- 1-1 -CONTENTSSECTION 1. GENERAL SERVICING
PRECAUTIONS.....................................................................................................................1-2
ESD
PRECAUTIONS..................................................................................................................................1-4
SPECIFICATIONS......................................................................................................................................1-5SECTION
2. ELECTRICAL
ADJUSTMENTS..........................................................................................................................................2-1
TROUBLESHOOTING................................................................................................................................2-3
WAVEFORMS OF MAJOR CHECK
POINT...............................................................................................2-8
BLOCK
DIAGRAM......................................................................................................................................2-9
SCHEMATIC DIAGRAMS
........................................................................................................................2-11
WIRING DIAGRAM
....................................................................................................................................2-19
PRINTED CIRCUIT
DIARGAM.................................................................................................................2-21
INTERNAL BLOCK DIAGRAM OF
ICs....................................................................................................2-31
REPAIRS REGARDING CD
MECHANISM..............................................................................................2-40SECTION
3. EXPLODED VIEWS CABINET AND MAIN FRAME
SECTION...................................................................................................3-1
TAPE DECK MECHANISM: AUTO REVERSE
DECK.................................................................................3-3
TAPE DECK MECHANISM: AUTO STOP
DECK(OPTIONAL)...................................................................3-5
CD
MECHANISM.........................................................................................................................................3-7
SECTION 4. SPEAKER
SECTION.................................................................................................4-1SECTION
5. REPLACEMENT PARTS
LIST..................................................................................5-1-
1-2 -SECTION 1. GENERALSERVICING PRECAUTIONSNOTES REGARDING
HANDLING OF THE PICK-UP1. Notes for transport and storage1) The
pick-up should always be left in its conductive bag until
immediately prior to use.2) The pick-up should never be subjected
to external pressure or impact.2. Repair notes1) The pick-up
incorporates a strong magnet, and so should never be brought close
to magnetic materials.2) The pick-up should always be handled
correctly and carefully, taking care to avoid external pressure
andimpact. If it is subjected to strong pressure or impact, the
result may be an operational malfunction and/ordamage to the
printed-circuit board.3) Each and every pick-up is already
individually adjusted to a high degree of precision, and for that
reasonthe adjustment point and installation screws should
absolutely never be touched.4) Laser beams may damage the
eyes!Absolutely never permit laser beams to enter the eyes!Also
NEVER switch ON the power to the laser output part (lens, etc.) of
the pick-up if it is damaged.5) Cleaning the lens surfaceIf there
is dust on the lens surface, the dust should be cleaned away by
using an air bush (such as usedfor camera lens). The lens is held
by a delicate spring. When cleaning the lens surface, therefore,
acotton swab should be used, taking care not to distort this.6)
Never attempt to disassemble the pick-up.Spring by excess pressure.
If the lens is extremely dirty, apply isopropyl alcohol to the
cotton swab. (Donot use any other liquid cleaners, because they
will damage the lens.) Take care not to use too much ofthis alcohol
on the swab, and do not allow the alcohol to get inside the
pick-up.Storage in conductive bag Drop impactNEVER look directly at
the laser beam, and dont letcontact fingers or other exposed
skin.MagnetHow to hold the pick-upaPressurePressureCotton
swabConductive Sheet- 1-3 -NOTES REGARDING COMPACT DISC PLAYER
REPAIRS 1. Preparations1) Compact disc players incorporate a great
many ICs as well as the pick-up (laser diode). Thesecomponents are
sensitive to, and easily affected by, static electricity. If such
static electricity is highvoltage, components can be damaged, and
for that reason components should be handled with care.2) The
pick-up is composed of many optical components and other
high-precision components. Care mustbe taken, therefore, to avoid
repair or storage where the temperature of humidity is high, where
strongmagnetism is present, or where there is excessive dust.2.
Notes for repair1) Before replacing a component part, first
disconnect the power supply lead wire from the unit2) All
equipment, measuring instruments and tools must be grounded.3) The
workbench should be covered with a conductive sheet and
grounded.When removing the laser pick-up from its conductive bag,
do not place the pick-up on the bag. (This isbecause there is the
possibility of damage by static electricity.)4) To prevent AC
leakage, the metal part of the soldering iron should be grounded.5)
Workers should be grounded by an armband (1M)6) Care should be
taken not to permit the laser pick-up to come in contact with
clothing, in order to preventstatic electricity changes in the
clothing to escape from the armband.7) The laser beam from the
pick-up should NEVER be directly facing the eyes or bare
skin.CLEARING MALFUNCTIONYou can reset your unit to initial status
if malfunction occur(button malfunction, display, etc.).Using a
pointed good conductor(such as driver), simply short the RESET jump
wire on the inside of thevolume knob for more than 3 seconds. If
you reset your unit, you must reenter all its settings(stations,
clock, timer)NOTE: 1. To operate the RESET jump wire, pull the
volume rotary knob and release it.2. If you wish to operate the
RESET jump wire, it is necessary to unplug the power
cord.ArmbandConductiveSheetResistor(1 Mohm)Resistor(1 Mohm)VOLUME
KNOBUPDOWNVOLUMERESET jump wireESD PRECAUTIONSElectrostatically
Sensitive Devices (ESD)Some semiconductor (solid state) devices can
be damaged easily by static electricity. Such componentscommonly
are called Electrostatically Sensitive Devices (ESD). Examples of
typical ESD devices are integratedcircuits and some field-effect
transistors and semiconductor chip components. The following
techniques shouldbe used to help reduce the incidence of component
damage caused by static electricity.1. Immediately before handling
any semiconductor component or semiconductor-equipped assembly,
drain offany electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear acommercially
available discharging wrist strap device, which should be removed
for potential shock reasonsprior to applying power to the unit
under test.2. After removing an electrical assembly equipped with
ESD devices, place the assembly on a conductivesurface such as
aluminum foil, to prevent electrostatic charge buildup or exposure
of the assembly.3. Use only a grounded-tip soldering iron to solder
or unsolder ESD devices.4. Use only an anti-static solder removal
device. Some solder removal devices not classified as "anti-static"
cangenerate electrical charges sufficient to damage ESD devices.5.
Do not use freon-propelled chemicals. These can generate electrical
charges sufficient to damage ESDdevices.6. Do not remove a
replacement ESD device from its protective package until
immediately before you areready to install it. (Most replacement
ESD devices are packaged with leads electrically shorted together
byconductive foam, aluminum foil or comparable conductive
materials).7. Immediately before removing the protective material
from the leads of a replacement ESD device, touch theprotective
material to the chassis or circuit assembly into which the device
will by installed.CAUTION : BE SURE NO POWER IS APPLIED TO THE
CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHERSAFETY PRECAUTIONS.8.
Minimize bodily motions when handing unpackaged replacement ESD
devices. (Otherwise harmless motionsuch as the brushing together of
your clothes fabric or the lifting of your foot from a carpeted
floor cangenerate static electricity sufficient to damage an ESD
device).- 1-4 -- 1-5 -SPECIFICATIONS1. AMP SECTION1) Power Output
(6 , 2 channel, T.H.D.
10%)......................................................................110W+110W2)
T.H.D............................................................................................................................................0.15%3)
Frequency Response (-3dB
down)....................................................................................42Hz~25kHz4)
Signal-to-noise
Ratio......................................................................................................................80dB5)
Input Sensitivity
AUX............................................................................................................40050mV6)
Channel Difference
1kHz.................................................................................................................3dB2.
TUNER SECTION1) FM/OIRT1) Frequency
Range.....................................................................................................87.5MHz~108MHz................................................................................................or
65.0MHz~74.0MHz & 87.5MHz~108MHz2) Intermediate
Frequency...........................................................................................................10.7MHz3)
Sensitivity
(70MHz/78.6MHz/83.0MHz/86.6MHz/90MHz/98MHz).................................................12dB4)
Signal-to-noise Ratio
98.1MHz(Mono/Stereo)......................................................................61dB/58dB5)
Image Rejection
106.1MHz............................................................................................................20dB6)
IF Rejection
90.1MHz....................................................................................................................65dB7)
Distortion
98.1MHz(Mono/Stereo)............................................................................................1.2/1.2%8)
Frequency Response
(-3dB).............................................................................................60Hz~10kHz9)
Stereo Separation
(100Hz/1kHz/10kHz)........................................................................................25dB2)
AM(MW)1) Frequency
Range........................................522KHz~1611KHz/530KHz~1610KHz/530KHz~1720KHz2)
Intermediate
Frequency.............................................................................................................450KHz3)
Usable
Sensitivity...........................................................................................................................55dB4)
Image Rejection
(1404kHz)...........................................................................................................23dB5)
IF Rejection
(603kHz)....................................................................................................................40dB6)
Selectivity
(1008kHz)...................................................................................................................23dB7)
Signal-to-noise Ratio
(1008kHz)....................................................................................................35dB8)
Distortion
(1008kHz)......................................................................................................................1.5%9)
Frequency Response
(1008kHz)...................................................................................100Hz~1900Hz3)
SW(OPTIONAL)1) Frequency
Range.........................................................................................................5.8MHz~18MHz2)
Intermediate
Frequency.............................................................................................................450kHz3)
Usable
Sensitivity...........................................................................................................................40dB4)
Signal To Noise
Ratio....................................................................................................................35dB5)
Distortion
..........................................................................................................................................3%4)
LW(OPTIONAL)1) Frequency
Range........................................................................................................153kHz~281kHz2)
Intermediate
Frequency.............................................................................................................450kHz3)
Usable
Sensitivity...........................................................................................................................65dB4)
Signal To Noise Ratio
(200kHz).....................................................................................................28dB5)
Distortion
(200kHz)...........................................................................................................................3%3.
TAPE DECK SECTION1) Tape Speed (MTT-111) / Normal
Speed..............................................................4.75(+2%,
-1%)cm/sec2) Wow Flutter (MTT-111)
..................................................................................................................0.25%3)
Fast Forward and Rewind Time
(C-60).........................................................................................120sec4)
Frequency Response (6dB
range).......................................................................................125Hz~8kHz5)
Signal-to-noise Ratio
(Playback/Record)................................................................................43dB/43dB5)
Distortion
(Playback/Record).......................................................................................................3%
/ 4%6) Crosstalk (Playback:
1kHz)...............................................................................................................55dB7)
Channel Separation (Playback:
1kHz)..............................................................................................50dB8)
Erase
Ratio.......................................................................................................................................55dB4.
COMPACT DISC PLAYER SECTION1) Frequency Response
(40Hz-18kHz)......................................................................................+0.5/-3.0dB2)
Signal-to-noise Ratio
(1kHz).............................................................................................................70dB3)
Dynamic Range
(1kHz).....................................................................................................................70dB4)
T.H.D.
(1kHz)....................................................................................................................................0.4%5)
Separation
(100Hz/1kHz/10kHz)...................................................................................45dB/45dB/40dB6)
Access Time Short /
Long.........................................................................................................2sec/5sec5.
GENERAL1) Power
requirement....................................................................................Refer
to the back panel of unit2) Power
consumption................................................................................................................About
400W3) Dimension (W x H x
D)...........................................................................................273
x 326 x 360 (mm)4) Weight
(net)......................................................................................................................................8.3kgNOTE
: Specification are subject to change without notice in the course
of product improvement.- 1-6 -- 2-1 -TAPE DECK ADJUSTMENT1. AZIMUTH
ADJUSTMENTFigure 1. Azimuth Adjustment Connection DiagramCH1
CH2Speaker OutPlayback ModeHeadTest TapeMTT-114L chR
chGNDDual-tracesynchroscopeElectronicVoltmeterL outR outUnitSECTION
2. ELECTRICALADJUSTMENTSThis set has been aligned at the factory
and normally will not require further adjustment. As a result, it
is notrecommended that any attempt is made to modificate any
circuit. If any parts are replaced or if anyone tamperswith the
adjustment, realignment may be necessary.IMPORTANT1. Check
Power-source voltage.2. Set the function switch to band being
aligned.3. Turn volume control to minimum unless otherwise noted.4.
Connect low side of signal source and output indicator to chassis
ground unless otherwise specified.5. Keep the signal input as low
as possible to avoid AGC and AC action.Deck Mode Test Tape Test
Point Adjustment Adjust forA Deck Playback MTT-114 Speaker OutDECK
ScrewMaximumAzimuth ScrewB Deck Playback MTT-114 Speaker Out
Azimuth Screw Maximum2. MOTOR SPEED ADJUSTMENTFigure 2.Motor Speed
Adjustment Connection DiagramHeadPlayback ModeUnitSpeaker OutGNDL
outR outRecord/PlaybackheadTest TapeMTT-111Frequency CounterDeck
Mode Test Tape Test Point Adjustment Adjust for RemarkNormal Speed
MTT-111 Speaker Out VR201 3kHz 1% A DeckHI-Speed MTT-111 Speaker
Out more than 5.4kHz HI-Speed Dubbing Mode- 2-2 -3. RECORD BIAS
ADJUSTMENTHeadUnitPN202GND Record/PlaybackheadTest
TapeMTT-5511Record/Playbackand Pause ModeFrequency CounterDeck Mode
Test Tape Test Point Adjustment Adjust forRec/Pause MTT-5511ERASE
HEADL20360kHz5kHz (Auto stop)WIRE(PN202) 85kHz5kHz(Auto
Reverse)Figure 3. Record Bias Adjustment Connection Diagram4. TUNER
ADJUSTMENTFigure 4. Tuner(S curve) Adjustment Connection
DiagramUnitSignal GeneratorGNDElectronicOSCILLOSCOPEFM
AntennaTerminal SpeakerItem Test Point Adjustment Adjust forAM IF
Speaker OutL101 Maximum- 2-3 -TROUBLESHOOTINGTurn power on.Is power
on?Does initial read work?Does it play?Does it output audio?Check
power supply circuit.(Check PN 701)Check laser circuit.Check focus
circuit.Check disc.Check tracking servo circuit.Check audio
circuit.OKYESYESYESYESNONONONO- 2-4 -Fails to initial read
1.3VABYESYESYESYESYESYESYESYESNONONO NO NO NONONONONODoes laser
light?Disc motor turns.Does RFwaveformappear?TP 801(RF)Does
trackingservo work?Lower envelopeof TP801(RF)waveform is flat.Does
signalappear atTP801(TEO)?Does signal appear at IC 803Pinand Pin
?Does GFS (IC802 pin 25)show as below?Is rotation normal?Is there
no dropout of RFsignal?Does TE2 signalappear at pinof
IC801?Defective IC801, pick upand/or openwire.Detective
pattern.Defective IC 801and/or IC 803Defective pick-upand/or
connector.Defective IC 801.Scratch in discinitial read
area.Defective pick-upadjustment focus offset.5326 27- 2-5
-ANONONONONONOLaser does not light.Is 3.5V applied to pinof IC
801?Is power supplied to laser Q801?(Q 801 collector: about
1.8V)Does laser current flow?1.0V across R801Is data transferred
fromMICOM IC ?Does voltage appear at IC803 pin 11, 12?Defective
MICOM.Defective MICOM.Defective connector.Defective IC 801, 803
Defective slide motor and/orconnector.Defective LMT SW
and/orconnector.Defective Q 801 and/or laser.Defective laser
and/orconnector.Did pickup return toinnermost circular?Does it stop
at inner pickcircular after shift?Is defect output from LMSW
applied to pin 2 ofPN803?R8011.0VR8011.0VYESYESYESYESOPEN
CLOSEYESYESYESYESYESYES70- 2-6 -BCDoes lens move up/down?Does IC
801 out focussearch signal?IC 801 pin (FEO)Is focus search
signalapplied to pin , ofCN801?Laser lights.Confirminitialread
withdiscDefective IC801 Defective IC803 Defective IC 801.Open
activator and/orconnector.Open connector and/ordefective IC
801.Incorrect turntable height.Degraded laser diode.Does TP 801 RF
signal appear even inlow level?Is laser output adjustment
correct?Does FOK(focus ok) signal
appear?YESYESYESYESYESYESTP801(RF)IC801 pin(FOK)NO NONONONONO4813
1640- 2-7 -FERISTAT(SENSE)CStart modeDoes FE1 signal appear? IC 801
pinDoes FZC signal (focus zero cross signal)appear at pinof IC 801,
ISTAT (SENSE)terminal?Does SMON signal appear at pinof IC 802?Does
SMPO signal appear at pinof IC 802?Is drive voltage applied to disk
motor?Defective IC 801.Open pick diodeDefective IC 801.Defective
Pattern between IC 801 andIC 802.Defective IC 801, 803
and/orperipheral circuit.Defective disk motor and/or
insulation.(Focus servo turnsON by FZC signalof FOK
mod.)NONONONOYESYESYESYESYES73753159- 2-8 -(CH1)(CH2)WAVEFORMS OF
MAJOR CHECK POINT1. HF signal (RF signal ) waveform(Test Point
TP801) during normal play 2. EFM signal (pinIC 801)waveformduring
Normal Play3. Focus coil drive waveform(Pin NO 1, 2 of IC 803) When
focus search failed or there is no disc on the tray Focus coil
drive waveform(pin NO 1, 2 of IC803) and FOK(pin NOof IC 801) when
focus search is accomplished4. Tracking coil drive waveform (pin
NO,of IC 803)and TEO during track traverse(1) When time division is
20nS/div(2) When time division 0.5nS/div.(During forward track
traverse)(3) When time division is 0.5nS/div.(During backward Track
Traverse)5. Feed motor drive waveform(pin NO 11, 12 of IC
803)During normal playCH1 : FOCUS COIL DRIVESIGNAL 2V/Div.CH2 :
FOAKCH1 : TEO(TP801)1V/Div.CH2 : TRACKING COIL DRIVESIGNAL
2V/Div.(((((CH1 : TEO(TP801)1V/Div.CH2 : TRACKING COIL DRIVESIGNAL
2V/Div.CH1 : TEO(TP801)1V/Div.CH2 : TRACK COIL DRIVESIGNAL
2V/Div.402633270.5V/Div.500nS/Div.(2V/Div.500nS/Div.(0.5V/Div.500nS/Div.OVOVOV(CH1)(CH2)(CH1)(CH2)(CH2)OVOVOVOVOVOVOVOVOV-
2-29 - POWER P.C. BOARD(optional, with POWER SAVING function)- 2-30
- CD MAIN P.C. BOARDLOCATION GUIDE- 2-31 -Pre
OutCh23.3F3.3F3.3F3.3F3.3F1000F1000F47F47F47F0.018F1000F3.3F47F1.2F100FR
. RVcc1000F47F0.018F10k10k150k150k1M2.2k2.2kRec INCh2RecINRec
INCh1ALCRec
OutCh2180k180kGvGvo180k180k1k1k1k1k100k10010k10k10300k9.1k100Pre
INCh2/B(Play Rec)Pre INCh2/A(Play only)Pre INCh1/B(Play Rec)Pre
OutCh1Pre INCh1/ACh1/B NFCh2/ACh1/ACh1/BGvoGvGvoGvVccMNNF
NFCh1Ch1Ch2GvcGVCh2ALCGNDRec151413121123241216 17 18 19 21
22INVref1VrefVref2A/BMetalOutPreOutRECOutRec OutCh1MixOutGND1
M/N6.8kAB1000pF1000pF6.8k 9.1k20109 8 7 6 4 3 5M/NREC SW REC SW GND
P/B SW P/B SW CONT GND GND VCC1 2 3 4 5 6 7 8 9 KA3082
KIA6289NINTERNAL BLOCK DIAGRAM OF ICs LA1837- 2-32 - KIA7805 P/PI ~
KIA7824P/PI3124R12R1C21R12Q1Q7Q13Q10Q6Q5Q4Q3Q11Q15Q14Q9Q
8Q16Q17QINPUTOUTPUTGND2Q1Z18R8R9R13R11R17R5R6R1R2RR16R20R19R14R10R7R
LC72723M+5V+5VVREFCIN FLOUT VREFVddaVssaMPXINTESTXIN
XOUTVssdVdddRDCLRDDAMODERSTRDS-IDREADYCLK(4.332MHz)SMOOTHINGFILTEROSCPLL(57kHz)DATADECODERRAM(128bit)RDS-IDDETECTCLOCKRECOVERY(1187.5Hz)ANTIALIASINGFILTERREFERENCEVOLTAGE57kHzBPF(SCF)TEST-
2-33 - TDA7440D STK 412-010L-IN1100K100K100K100K100K100K100K100K4 8
9 1827212220262425LOUTSCLSDADIG_GNDROUTVSAGNDRBRB14 1510 11 19 12
13 235GG6732INPUT MULTIPLEXER+GAINMUXOUTRINR TREBLE(R) BIN(R)
BOUT(R) CREF D98AU8830/30dB2dB STEPMUXOUTLVOLUME TREBLEI CBUS
DECODER + LATCHESBASSSPKR ATTLEFTVOLUME TREBLE BASSSUPPLYVREFSPKR
ATTRIGHTINL TREBLE(L) BOUT(L)
BIN(L)128L-IN2L-IN3L-IN4R-IN1R-IN2R-IN3R-IN4214TR1
TR2TR6TR9TR8TR10TR16C12D41TR11C11TR14
TR13R11TR41TR12D51D12R41D53D52D43D42SUBComparatorComparatorTR19TR18TR17TR15TR51TR7TR5TR20D2D1C2R1
C1R4R2TR4 TR3R5R6R7R3 R13R16R15R12R51R14R17151612 9 8 11 1013 18
176457231- 2-34 -B01 B02 B03 B04 I01
I02XINPDAINAOUTIFINXOUTFMINAMINCEDICLD0VDDVSSREFERENCEDIVIDERPHASEDETECTORCHARGE
PUMPUNLOCKDETECTORUNIVERSALCOUNTERDATA SHIFT REGISTERLATCH12bits
PROGRAMMABLEDIVIDERSWALLOW COUNTER1/16. 1/17
4bitsPOWERONRESETCCBI/F12 LC72131, 72131M
MSGEQ7AudioInAnti-AliasFilterClockOscillatorOutputMultiplexorCKINReset63HzBandpass160HzBandpass400HzBandpass1kHzBandpass2.5kHzBandpass6.25kHzBandpass16kHzBandpassPeakDetectorPeakDetectorPeakDetectorPeakDetectorPeakDetectorPeakDetectorPeakDetectorStrobeDC
Out- 2-35 - KA9258PIN DESCRIPTION 28 27 26 25 24 23 22 21 20 19 18
17 16 151 2 3 4 5 6 7 8 9 10 11 12 13
14LEVELSHIFTLEVELSHIFTLEVELSHIFT10K10K10K50K
50K10K10KREGULATORMUTE10K 10KTSDLEVELSHIFT10K10K10KPin No. Symbol
I/O Description1 DO1-1 O Drive Output2 DO1-2 O Drive Output3 DI1-1
I Drive Input4 DI1-2 I Drive Input 5 REGRegulator6 REO O Regulator
Output 7 MUTE I Mute8 GND1 - Ground9 DI2.1 I Drive Input10 DI2.2 I
Drive Input11 DO2.1 O Drive Output12 DO2.2 O Drive Output13 GND2 -
Ground14 OPOUT O OPamp OutputPin No. Symbol I/O Description15
OPIN(-) I OPamp Input(-)16 OPIN(+) I OPamp output(+)17 DO3-1 O
Drive Output(-)18 DO3-2 O Drive Output(+)19 DI3-I I Drive Input20
DI3-2 I Drive Input21 VCC1 - Supply Voltage 22 VCC2 - Supply
voltage 23 VREF I 2.5V Bias Voltage24 DI4.1 I Drive Input25 DI4.2 I
Drive Input26 DO4.1 O Drive Output(+)27 DO4.2 O Drive Output(-)28
GND3 - Ground- 2-36 -MICOM TO SERVO CONTROLAUTO SEQUENCERFOK
DETECTIONCIRCUITMIRROR DETECTIONCIRCUITSpindle Servo LPF(Double
Speed)Sled Servo Amplifier& Sled Kick
GEN.TrackingPhaseCompensation Block& Jump Pulse
GEN.FocusPhaseCompensation& Offset cancel circuit Micom
DataInterface LogicRF
Amp737465666367687969707178767532337724RF-RFOPD1PD2FEEIPDLDVRARFIRFASYEFMRFIDCBDCC1GC1OMLTTZCFE2FLBFGDFS3TE1FE1GC1ICH1OCH1IMUTEIRRCCH2OCH2IGC2IGC2O5
15 16 13 14 19 17 12 11 9
10401396252423454642444361625553504957484760FOKMCPMIRRORFSETSMEFSMONFS1
toFS4TM1 toTM6BAL1 toBAL5PS1 toPS4GA1
toGA5SMPDSPDL-SPDLOSL+SL-SLOTGUTG2LPFTTE2TEOTE-TDFCTFEOFE-FDFCT3 27
28 26 58 52 51 35 36 37 38 31 29 30 22 54 59APC AmpCenter Voltage
Amp.Focus Error AmpFE-BIAS AdjustmentTracking Error AmpE/F Balance
& GainControlRF Level AGC &EqualizerEFMComparatorDefect
DetectionCircuitTADJUSTMENT-FREE CONTROLBuilt-in Post Filter
Amp(L&R)LDONPIN DESCRIPTIONPin No. System Description1 MCP
Capacitor connection pin for mirror hold2DCB Capacitor connection
pin for defect Bottom hold3 FRSH. Capacitor connection pin for time
constant to generate focus search waveform4DCC2 The input pin
through capacitor of defect bottom hold output5DCC1 The output pin
of defect bottom hold6FSET The peak frequency setting pin for
focus, tracking servo and cut off frequency of CLV LPF7VDDA Analog
VCC for servo part8VCCP VCC for post filter9GC2I Amplifier negative
input pin for gain and low pass filtering of DAC output CH210GC2O
Amplifier output pin for gain and low pass filtering of DAC output
CH211CH2I The input pin for post filter channel212CH2O The output
pin for post filter channel213CH1O The output pin for post filter
channl114CH1I The input pin for post filter channel115GC1O
Amplifier output pin for gain and low pass filtering of DAC output
CH1 KB9223- 2-37 -Pin No. System Description16GC1I Amplifier
negative input pin for gain and low pass filtering of DAC output
CH117RRC The pin for noise reduction of post filter bias18VSSP VSS
for post filter19MUTEI The input pin for post filter muting
control20ISET The input pin for current setting of focus search,
track jump and sled kick voltage21VREG The output pin of
regulator22WDCK The clock input pin for auto sequence23SMDP The
input pin of CLV control output pin SMDP of DSP24SMON The input pin
for spindle servo ON through SMON of DSP25SMEF The input pin of
provide for an external LPF time constant26FLB Capacitor connection
pin to perform rising low bandwidth of focus loop27FS3 The pin for
high frequency gain change of focus loop with internal FS3
switch28FGD Reducing high freqency gain with capacitor between FS3
pin29LOCK Sled runaway prevention pin30TRCNT Track count output
pin31ISTAT Internal status output pin32ASY The input pin for
asymmetry control33EFM EFM comparator output pin34VSSA Analog VSS
for servo part35MCK Micom clock input pin36MDATA Micom data input
pin37MLT Micom data latch input pin38RESET Reset input pin39MIRROR
The mirror output for test40FOK The output pin of focus OK
comparator41SSTOP The pin for detection whether pick_up position is
innermost or not42SL+ The noninverting input pin of sled servo
amplifier43SLO The output pin of sled servo amplifier44SL- The
inverting input pin of sled servo amplifier45SPDL- The noninverting
input pin of spindle servo amplifier46SPDLO The output pin of
spindle servo amplifier47FE- The inverting input pin of focus servo
amplifier48FEO The output pin of focus servo amplifier49TE- The
inverting input pin of tracking servo amplifier50TEO The output pin
of tracking servo amplifier51ATSC The input pin for Anti-shock
detection52TZC The comaparator input pin for tracking zero crossing
detection53TE2 Tracking servo input pin54TE1 Tracking error
amplifier output pin55LPFT The input pin of tracking error low pass
filtering signal56DVDD The power supply pin for logic
circuit57TDFCT The capacitor connection pin for tracking defect
compensation58FE2 Focus servo input pin59FE1 Focus error amplifier
output pin60FDFCT The capacitor connection pin for focus defect
compensation61TGU The capacitor connection pin for high frequency
tracking gain switch62TG2 The pin for high frequency gain change of
tracking servo loop with internal TG2 switch63FEBIAS Focus error
bias voltage control pin64DVEE The DVEE pin for logic circuit65PD1
The negative input pin of RF I/V amplifier1 (A+C signal)66PD2 The
negative input pin of RF I/V amplifier2 (B+D signal)67F The
negative input pin of F I/V amplifier (F signal)68E The negative
input pin of E I/V amplifier (E signal)69PD The input pin for
APC70LD The output pin for APC71VR The output pin of (AVEE+AVCC)/2
voltage72VCC VCC for RF part73RF- RF summing amplifier inverting
input pin74RFO RF summing amplifier output pin75IRF The input pin
for AGC76ARF The output pin for AGC77RFI The input pin for EFM
comparating78CAGC The capacitor connection pin for AGC79EI Feedback
input pin of E I/V amplifier for EF Balance control80GND GND for RF
part- 2-38 -
KS9286SUBCODESYNCDETECTORSUBCODEOUTPUTEFMDEMODULATOR8BIT DATA
BUSADDRESSGENERATOREFMPHASEDETECTORDIGITALPLLDIGITALCLVSERVOCPUINTERFACEMODESELECTORDIGITALOUTPUTD/ACONVERTERDIGITALFILTER&
DE-EMPHINTERPOLATORECC16KSRAMTRACKCOUNTER23BITSHIFTREGISTERFRAME
SYNCDETECTORPROTECTORINSERTORX-TALTIMINGGENERATORSUBCODE-QREGISTERSQDT
302911665342727375767098373836616263657192033322669681214776760241722SDATSBCKS0S1LRCHOADATAOBCKOBCKIADATAILRCHIEMPHVREFL1VREFH1EFMICNTVOLDPFINDPFOUTDPDOSMEFSMONSMDPSMSDLOCKXOUTLCHOUTRCHOUTDATXTEST1TEST0XTALSELCDROMXINMDATMCKMLTTRCNT/ISTATSQCKPIN
DESCRIPTIONPin No. Symbol IO Description1AVDD1 - Analog VCC12 DPDO
O Charge pump output for Digital PLL3 DPFIN I Filter input for
Digital PLL4 DPFOUT O Filter output for Digital PLL5CNTVOL I VCO
control voltage for Digital PLL6 AVSS1 - Analog Ground17 DATX O
Digital Audio output data8XIN I Xtal oscillator input9 XOUT O Xtal
oscillator output10WDCHO O Word clock output of 48bit/Slot
(88.2KHz)11LRCHO O Channel clock output of 48 bit/Slot (44.1KHz),
88.2KHz when ESP ON12ADATAO O Serial audio data output of 48
bit/Slot (MSB first), double speed output when ESP ON13DVSS1 -
Digital Ground114BCKO O Audio data bit clock output of 48 bit/Slot
(2.1168MHz), 4.2336MHz when ESP ON15 C2PO O C2 Pointer for output
audio data16 VREFL2 I Input terminal2 of reference voltage L
(Floating)- 2-39 -Pin No. Symbol IO Description17 VREFL1 I Input
terminal1 of reference voltage L (GND connection)18 AVDD2 - Analog
VCC219 RCHOUT O Right-Channel audio output through D/A
converter20LCHOUT O Left-Channel audio output through D/A
converter21 AVSS2 - Analog ground222VREFH1 I Input terminal1 of
reference voltage H (VDD connection)23VREFH2 I Input terminal2 of
reference voltage H (Floating)24 EMPH O Emphasis/Non-Emphasis
output, H: Emphasis ON, L: Emphasis OFF25LKFS O The Lock Status
output of frame sync26S0S1 O Output of subcode sync signal
(S0+S1)27RESET I System reset at L28 /ESP I ESP function ON/OFF
control (L: ESP function ON, H: ESP function OFF)29SQCK I Clock for
output Subcode-Q data30SQDT O Serial output of Subcode-Q data31SQOK
O The CRC (Cycle Redundancy Check) check result signal output of
Subcode-Q32SBCK I Clock for output subcode data33SDAT O Subcode
serial data output34 DVDD1 - Digital VDD135 MUTE I Mute control
input (H: Mute ON)36MLT I Latch Signal Input from Micom (Scmit
Trigger)37 MDAT I Signal data input from Micom (Scmit Trigger)38MCK
I Signal clock Input from Micom (Scmit Trigger)39 DB8 I/O SRAM data
I/O port 8 (MSB)40 DB7 I/O SRAM data I/O port 741 DB6 I/O SRAM data
I/O port 642 DB5 I/O SRAM data I/O port 543 DB4 I/O SRAM data I/O
port 444 DB3 I/O SRAM data I/O port 345 DB2 I/O SRAM data I/O port
246 DB1 I/O SRAM data I/O port 1 (LSB)47C1F1 I/O Monitoring output
for C1 error correction (RA1)48 C1F2 I/O Monitoring output for C1
error correction (RA2)49 C2F1 I/O Monitoring output for C2 error
correction (RA3)50C2F2 I/O Monitoring output for C2 error
correction (RA4)51C2FL I/O C2 decoder flag (RA5, H: When one
processing C2 code is impossible correction status.)52/PBCK I/O
Output of VCO/2 (4.3218MHz) (RA6)53DVSS2 I/O Digital ground 254
FSDW I/O Window or unprotected frame sync (RA7)55 ULKFS I/O Frame
sync protection state (RA8)56 /JIT I/O Display of either RAM
overflow onncerflow for 4 frame jitter margin (RA9)57C4M I/O Only
monitoring signal (4.2336M .. RA10)58C16M I/O 16.9344MHz signal
output (RA11)59 /WE I/O Terminal for test60/CS I/O Terminal for
test61XTALSEL I Mode Selection1 (H: 33.8688MHz, L:
16.9344MHz)62TEST0 I TEST input terminal (GND connection)63CDROM I
Mode Selection2 (H: CD-ROM, L: CDP)64 SRAM I TEST input terminal
(GND connection)65TEST1 I TEST input terminal (GND connection)66
EFMI I EFM signal input67ADATAI I Serial audio data input of 48
bit/Slot (MSB first)68 /ISTAT O The internal status output69TRCNT I
Tracking counter input signal70 LOCK O Output signal of LKFS
condition sampled PBFR/16 (if LKFS is H, LOCK is H, if LKFS is
sampledL at least 8 times by PBFR/16, LOCK is L.)71 PBFR O Write
frame clock (Lock: 7.35KHz)72SMEF O LPF time constant control of
the spindle servo error signal73SMON O ON/OFF control signal for
spindle servo74DVDD2 - Digital VDD275 SMDP O Spindle Motor drive
(Rough control in the SPEED mode, Phase control in the PHASE
mode)76SMSD O Spindle Motor drive (Velocity control in the PHASE
mode)77BCKI I Audio data bit clock input of 48 bit/Slot
(2.1168MHz)78TESTV I TEST input terminal (GND connection)79DSPEED I
TEST input terminal (VDD connection)80LRCHI I Channel clock input
of 48 bit/Slot (44.1KHz)- 2-40 -REPAIRS REGARDING CD
MECHANISMIMPROVED METHOD - WHEN THE TRAY GEARS WERE DISTORTED1. How
to open the tray.In case of not suppling power push two hooks (H)
of the base, and them open the tray.2. How to improve the distorted
gears.(1) Do the hole "C" of the cam gear to face forward the
pick-up so the pick-up is down like figure.(2) Do the hole "B" of
main gear to face forward pick-up, too.(3) Set the last part of
main gear to point "A".(4) Push the tray to end.- 4-1 -SECTION 4.
SPEAKER SECTIONMODEL:
FE-876E850854867851852856857858854854859862865863861854860855864(
Regional )MODEL FE-876E RUNDATE : 02.MAY.2001LGEMS ,LGEPS ,LGEPR
,LGECB, LGEMK,LGEPL NSP : NON SVC PARTLOCA. NO. PART NO.
DESCRIPTION SPECIFICATION REMARKS850 3701RM0009A NET ASSY (FE-876E)
NET METAL GRILLE NSP851 3720RMF012A PANEL,FRONT FRONT
PANEL(FE-876E) NSP852 6400RMEB01A SPEAKER,TWEETER FE-876E
06N39EHC0339A EAW 60HM854 353M050C SCREW BH 3.5X16 FBK855 353M021A
SCREW WOOD,3.5X16, HEAD 6MM,FBK856 353M050G SCREW,DRAWING 2
D4.0L8.0MSWR3/FZY857 6400RCEY01A SPEAKER,GENERAL PIEZO EAW
(FE-868E)500 OHM 100858 6400RMEJ02A SPEAKER,WOOFER FE-876E
16L90EHC0337 EAW 60HM859 3110RM0007A CASE TOP CASE(FE-876) NSP860
4350RM0005A RING WF RING (FE-876E) NSP861 353M025Q SCREW WOOD,3X10
FBK862 353M025K SCREW TAPTITE, 3X12 FZMY863 6871RU4119A PWB(PCB)
ASSY,SUBSET FE-876E SPK NETWORK ASSY NSP864 4766SMN028A FELT
DUCT(F515/717E) BLACK865 3091RMW013A CABINET ASSY FE-876E ORIGINAL
NSP867 3530RMM005A GRILLE GRILLE METAL TW(FE-876E)2-92-10 BLOCK
DIAGRAMAC 4.6V FOR FIP2-112-12 SCHEMATIC DIAGRAMS AMP/POWER
SCHEMATIC DIAGRAM2-132-14 FRONT SCHEMATIC DIAGRAMNOTES : 1.
Resistance values are indicted in ohms unless otherwise specified
(K=1,000, M=1,000,000).2. Capacitance values are shown in
microfarads unless otherwise (P=MICRO-MICRO FARADS).3. Schematic
diagram for this model are subject to change for improvement
without prior notice.2-152-16 TUNER SCHEMATIC DIAGRAMNOTES : 1.
Resistance values are indicted in ohms unless otherwise specified
(K=1,000, M=1,000,000).2. Capacitance values are shown in
microfarads unless otherwise (P=MICRO-MICRO FARADS).3. Schematic
diagram for this model are subject to change for improvement
without prior notice.2-172-18 CDP SCHEMATIC DIAGRAM2-202-19
16P5P6P10P20P3P8P10P10PJK102JK601JK701JK602CN302PN801PN805PN803PN806CN806PN202PN201CN701PN701CN305PN302VR304T70110PCN703PN701PN80620PPN8044P2PPN802VR301CN702
3PPN702 3PPN301 17PVR302CN304WIRING DIAGRAMNOTES : 1. Wiring
diagram for this model are subject to change for improvement
without prior notice.2-212-22 PRINTED CIRCUIT DIAGRAM
AMP/TUNER/POWER/DECK P.C. BOARD(COMPONENT SIDE)
AMP/TUNER/POWER/DECK P.C. BOARD(SOLDER SIDE)2-232-24 2-252-26 FRONT
P.C. BOARD(COMPONENT SIDE)2-272-28 FRONT P.C. BOARD(SOLDER SIDE)-
3-1 - - 3-2 -SECTION 3. EXPLODED VIEWS CABINET AND MAIN FRAME
SECTION286287284458286264355267271262260454354352351A26A41257274291292272250310454305330451302354454454A43454A00285452288454451454301A46353278280279277452A48276303306451NOTE)Refer
to SECTION 5 REPLACEMENTPARTS LIST in order to look for the part
number of each part.3-33-4 TAPE DECK MECHANISM: AUTO REVERSE
DECK400011503401401009010501502507508013406409410036032038034035039029040031028027026014015403504024025023405A01402022016017018019020021505007008003004005001002404400400506037006LOCA.
NO PART NO. SPECIFICATIONA00 6730R-G007B CDM-H1323 CD CHANA01
6768R-UP01A 50-093-4249 PCB AS001 6768R-BP01B 02-084-4202
BELT/FELT002 6768R-BP01A 02-084-4204 BELT/FELT003 6768R-AP01D
50-239-4027 CWL44004 6768R-AP01E 50-239-4026 ARM005 6768R-SP01E
01-082-4654 SPRING 006 6768R-QP01A 50-093-4316 MOTOR007 6768R-GP01A
50-093-4063 GEAR 008 6768R-SP01F 01-082-4598 SPRING009 6768R-MP01C
50-219-4014 MOLD 010 6768R-SP01C 01-082-4652 SPRING011 6768R-SP01A
01-081-4601 SPRING013 6768R-SP01B 01-082-4651 SPRING014 6768R-SP01G
01-082-4597 SPRING015 6768R-AP01A 50-268-3016 ARM016 6768R-GP01C
50-093-4069 GEAR017 6768R-AP01C 50-239-4072 ARM 018 6768R-GP01D
50-222-4007 GEAR019 6768R-SP01H 01-081-4657 SPRING020 6768R-BP01C
02-083-4188 BELT/FELT021 6768R-LP01A 50-223-4254 PULLEY022
6768R-VP01A 50-093-4125 SOLENOID023 6768R-GP01B 50-221-3009 GEAR
024 6768R-AP01B 50-139-4292 ARM 025 6768R-JP01B 50-093-3361
PULLEY026 6768R-SP01D 01-080-4609 SPRING 027 6768R-DP01A
50-259-3342 LEVER 028 6768R-RP01A 22-027-41054 ROLLER029
6768R-MP01A 50-219-4033 MOLD 031 6768R-SP01L 01-080-4649 SPRING032
6768R-EP01A 50-093-4070 HEAD AY033 6768R-JP01A 50-093-3360
PULLEY034 6768R-SP01K 01-082-4650 SPRING035 6768R-PP01A 50-119-4046
PRESS036 6768R-PP01B 50-160-4108 PRESS037 6768R-JP01C 50-093-3315
PULLEY038 6768R-MP01D 50-219-4034 MOLD040 6768R-SP01M 01-080-4607
SPRING400 6768R-CP01A GSE10A2003 SCREW401 6768R-CP01B GSE20A2005
SCREW402 6768R-CP01C GSE10A2004 SCREW403 6768R-CP01D GSL10A1704
SCREW404 6768R-CP01E GSP10A2603 SCREW405 6768R-CP01F GSP11A2012
SCREW406 6768R-CP01G GSE20A2004 SCREW409 6768R-CP01L GSD10A2018
SCREW410 6768R-CP01M 03-300-4056 SCREW 501 6768R-WP01A GWM19S035035
WASHER502 6768R-WP01B GWM17S050035S WASHER503 6768R-WP01C
GWM40X075010 WASHER504 6768R-WP01D GWP21X045020 WASHER505
6768R-WP01E GWP12X030040S WASHER506 6768R-WP01H GWP23X040020
WASHER507 6768R-WP01F GWN21X040040 WASHER508 6768R-WP01G
GWM19X055035S WASHER3-53-6 TAPE DECK MECHANISM: AUTO STOP
DECK(OPTIONAL)400011503401401009010501502013406409408407032031030029028401027026014015403504024025023405A01402022016017018019020021505007008003004005001002404400400006LOCA.
NO PART NO. SPECIFICATIONA00 6730R-G007A CWL44FF25 TOKYO PIGEON
L-DOUBLA01 6768R-UP01A 50-093-4249 PIGEON UNIT PCB AS001
6768R-BP01B 02-084-4202 PIGEON BELT / FELT C002 6768R-BP01A
02-084-4204 PIGEON BELT / FELT C003 6768R-AP01D 50-239-4027 PIGEON
ARM CWL44004 6768R-AP01E 50-239-4026 PIGEON ARM CWL44005
6768R-SP01E 01-082-4599 PIGEON SPRING CWL4006 6768R-QP01A
50-093-4316 PIGEON MOTOR(ASSY)007 6768R-GP01A 50-093-4063 PIGEON
GEAR CWL44008 6768R-SP01F 01-082-4598 PIGEON SPRING CWL4009
6768R-MP01C 50-219-4014 PIGEON MOLD CWL44010 6768R-SP01C
01-082-4652 PIGEON SPRING CWL4011 6768R-SP01A 01-081-4601 PIGEON
SPRING CWL4013 6768R-SP01B 01-082-4651 PIGEON SPRING CWL4014
6768R-SP01G 01-082-4597 PIGEON SPRING CWL4015 6768R-AP01A
50-268-3016 PIGEON ARM CWL44016 6768R-GP01C 50-093-4069 PIGEON GEAR
CWL44017 6768R-AP01C 50-239-4072 PIGEON ARM CWL44018 6768R-GP01D
50-222-4007 PIGEON GEAR CWL44019 6768R-SP01H 01-081-4657 PIGEON
SPRING CWL4020 6768R-BP01C 02-083-4188 PIGEON BELT / FELT C021
6768R-LP01A 50-223-4254 PIGEON PULLEY / FLYW022 6768R-VP01A
50-093-4125 PIGEON SOLENOID CW023 6768R-GP01B 50-221-3009 PIGEON
GEAR CWL44024 6768R-AP01B 50-139-4292 PIGEON ARM CWL44025
6768R-JP01B 50-093-3361 PIGEON PULLEY / FLYW026 6768R-SP01D
01-080-4609 PIGEON SPRING CWL4027 6768R-MP01B 50-093-3036 PIGEON
MOLD CWL44028 6768R-RP01A 22-027-41054 PIGEON ROLLER CWL029
6768R-MP01A 50-219-4033 PIGEON MOLD CWL44030 6768R-HP01A
TC881CB067B PIGEON HEAD CWL44031 6768R-SP01J 01-081-4605 PIGEON
SPRING CWL4032 6768R-HP01B TC231F PIGEON HEAD CWL44033 6768R-JP01A
50-093-3360 PIGEON PULLEY / FLYW400 6768R-CP01A GSE10A2003 PIGEON
SCREW CWL44401 6768R-CP01B GSE20A2005 PIGEON SCREW CWL44402
6768R-CP01C GSE10A2004 PIGEON SCREW CWL44403 6768R-CP01D GSL10A1704
PIGEON SCREW CWL44404 6768R-CP01E GSP10A2603 PIGEON SCREW CWL44405
6768R-CP01F GSP11A2012 PIGEON SCREW CWL44406 6768R-CP01G GSE20A2004
PIGEON SCREW CWL44407 6768R-CP01H GSL20A2005 PIGEON SCREW CWL44408
6768R-CP01J 03-300-4127 PIGEON SCREW CWL44409 6768R-CP01K
GSL20A2008 PIGEON SCREW CWL44501 6768R-WP01A GWM19S035035 PIGEON
WASHER CWL502 6768R-WP01B GWM17S050035S PIGEON WASHER CW503
6768R-WP01C GWM40X075010 PIGEON WASHER CWL504 6768R-WP01D
GWP21X045020 PIGEON WASHER CWL505 6768R-WP01E GWP12X030040S PIGEON
WASHER CW- 3-7 - - 3-8 - CD
MECHANISM416151152155184185184A35421A30421168417417153159A26169154158157156418416419165162166420167177176164163175170171174416173172417NOTE)Refer
to SECTION 5 REPLACEMENTPARTS LIST in order to look for the part
number of each part.