HCD-EP303 - Diagramasde.comdiagramasde.com/diagramas/audio/HCD-EP303 sm.pdf · HCD-EP303 US Model Canadian Model AEP Model UK Model ... such as the Simpson 229 or RCA ... 9, 10) ENTER/PGM
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HCD-EP303US Model
Canadian ModelAEP Model
UK ModelE Model
Australian Model
SERVICE MANUAL
COMPACT DISC DECK RECEIVERSony CorporationHome Audio Company
HCD-EP303 is the amplifler, CDplayer, tape deck and tuner section inCMT-EP303.
SPECIFICATIONS
Ver 1.1 2002. 11
CD Model Name Using Similar Mechanism HCD-EP30/EP40
SECTION CD Mechanism Type CS-21SC-1280
TAPE DECK Model Name Using Similar Mechanism HCD-EP30/EP40
SECTION Tape Transport Mechanism Type TCM125-2
— Continued on next page —
Amplifier section
AUDIO POWER SPECIFICATIONS:(U.S.A. model only)POWER OUTPUT AND TOTALHARMONIC DISTORTION:
with 4 Ω loads both channels driven, from 120- 10,000 Hz; rates 6 W per channel minimumRMS power, with no more than 10% totalharmonic distortion from 250 mW to ratedoutput.
Canadian model:Continuous RMS power output (reference)
6 + 6 W(4 Ω at 1 kHz, 10% THD)
European model:DIN power output (rated) 4.5 + 4.5 W
(4 Ω at 1 kHz, DIN)Continuous RMS power output (reference)
6 + 6 W(4 Ω at 1 kHz, 10% THD)
Music power output (reference)13 + 13 W
Other model:The following measured at AC 230 V or AC 120 V,50/60 HzDIN power output (rated) 4.5 + 4.5 W
(4 Ω at 1 kHz, DIN)Continuous RMS power output (reference)
6 + 6 W(4 Ω at 1 kHz, 10% THD)
OutputsPHONES: Accepts headphones of(stereo mini jack) 8 Ω or moreSPEAKER: Accepts impedance of 4 to
16 Ω
CD player sectionSystem Compact disc and digital
audio systemLaser Semiconductor laser
(λ=780 nm)Emission duration:continuous
Frequency response 20 Hz - 20 kHz (±0.5 dB)
Tape player sectionRecording system 4-track 2-channel stereoFrequency response 50 - 13 000 Hz (±3 dB),
using Sony TYPE Icassette
2
HCD-EP303
TABLE OF CONTENTSTuner sectionFM stereo, FM/AM superheterodyne tuner
FM tuner sectionTuning range 87.5 - 108.0 MHzAntenna FM lead antennaIntermediate frequency 10.7 MHz
AM tuner sectionTuning rangePan-American model: 530 - 1 710 kHz
(with the interval set at10 kHz)531 - 1 602 kHz(with the interval set at9 kHz)
European model: 531 -1 602 kHz(with the interval set at9 kHz)
Other models: 531 - 1 602 kHz(with the interval set at9 kHz)530 - 1 710 kHz(with the interval set at10 kHz)
Antenna Built-in ferrite bar antennaIntermediate frequency 450 kHz
GeneralPower requirementsNorth American model: 120 V AC, 60 HzEuropean model: 230 V AC, 50/60 HzAustralian model: 230 V AC, 50/60 HzMexican model: 120 V AC, 60 HzArgentine model: 220 - 230 V AC, 50/60 HzOther models: 230 V AC, 50/60 Hz
Power consumptionU.S.A. model: 25 WCanadian model: 25 WEuropean model: 30 W
0.5 W (in the standbymode)
Other models: 30 W
Dimensions (w/h/d): Approx. 145 × 240 × 252 mm
Mass: Approx. 2.9 kg
Design and specifications are subject to changewithout notice.
7. EXPLODED VIEWS ······················································ 327-1. Cabinet Section ··························································· 327-2. Front Panel Section -1 ················································ 337-3. Front Panel Section -2 ················································ 347-4. CD Cabinet Section ···················································· 35
8. ELECTRICAL PARTS LIST ······································· 36
3
To Exposed Metal Parts on Set
0.15 µF 1.5 kΩACVoltmeter(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
This appliance is classified as a CLASS 1 LASER product. TheCLASS 1 LASER PRODUCT MARKING is located on the rearexterior.
The following caution label is located inside the unit.
CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous radiationexposure.
HCD-EP303
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITHMARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSLIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY PARTS WHOSE PART NUMBERSAPPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSPUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORTÀ LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LESDIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONTCRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONYDONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OUDANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
Notes on chip component replacement• Never reuse a disconnected chip component.• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing• Keep the temperature of soldering iron around 270˚C
during repairing.• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY CHECK-OUTAfter correcting the original service problem, perform the followingsafety checks before releasing the set to the customer:Check the antenna terminals, metal trim, “metallized” knobs,screws, and all other exposed metal parts for AC leakage. Checkleakage as described below.
LEAKAGE TESTThe AC leakage from any exposed metal part to earth ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5 mA (500 microamperes).Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers’ instructions to use theseinstruments.
2. A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of aVOM or battery-operated AC voltmeter. The “limit” indicationis 0.75 V, so analog meters must have an accurate low-voltagescale. The Simpson 250 and Sanwa SH-63Trd are examplesof a passive VOM that is suitable. Nearly all battery operateddigital multimeters that have a 2V AC range are suitable. (SeeFig. A)
4
HCD-EP303SECTION 1
SERVICING NOTES
• MODEL IDENTIFICATION– Bottom View –
NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.
NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATIONCHECK1. Press the ?/1 button to the power ON with no disc inserted
and press the CD button.2. Open the lid for CD.3. Turn on SW600 as following figure.4. Confirm the laser diode emission while observing the objecting
lens. When there is no emission, Auto Power Control circuit orOptical Pick-up is broken.Objective lens moves up and down five times for the focussearch.
SW600
PART No.
at least 30 mm.
CASSETTE board
MAIN board
HEADPHONEboard
at least 30 mm
heatsink
MODEL PART No.AEP, UK models 4-235-972-0<
EXCEPT AEP, UK models 4-241-498-0<
TO PREVENT ‘TAPE OSCILLATION SOUND AT VOLUME’MAXIMUM SETTING (W/O TAPE)
Headphone wire dressing:a.) Draw the wire from Main board to Headphone board along the
bottom side of heatsink.b.) The wire must be kept away from the top side of Cassette board
5
HCD-EP303SECTION 2GENERAL This section is extracted
from instruction manual.
Main unit
R – Z
Remote sensor q;REPEAT (8)SHUFFLE (8)TAPE (12)TIMER indicator (15)TUNER (10, 11, 13)TUNER MEM (10)TUNING +/– (10, 11)VOLUME control
more than 5.89 mN•mREW CQ-201B (more than 60 g•cm)
(more than 0.83 oz•inch)
Type Signal Used for
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
P-4-A063 6.3 kHz, –10 dB Head Azimuth Adjustment
Record/Playback Head Azimuth AdjustmentProcedure:1. Mode: Playback
level metertest tape P-4-A063(6.3 kHz, –10 dB)
set
HEADPHONE boardPHONES jack (JK401)
32 Ω+–
2. Turn the adjustment screw and check output peaks. If the peaksdo not match for L-CH and R-CH, turn the adjustment screwso that outputs match within 1dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to theparts adjusted.
Screwposition
L-CHpeak
within1dB
Outputlevel
L-CHpeak
R-CHpeak
within1dB
Screwposition
R-CHpeak
test tape P-4-A063(6.3 kHz, –10 dB)
L-CH
R-CH
HEADPHONE boardPHONES jack (JK401)
oscilloscope
V H+ +
– –
screen pattern
in phase
good wrong
45 ° 90 ° 135 ° 180 °
32 Ω
32 Ω
set
13
HCD-EP303
Tape Speed AdjustmentSetting:Function: TAPE
Procedure:1. Playback WS-48A (tape center) in the FWD state.2. Adjsut the volume in CAPSTAN/REEL motor (M201) so that
the frequency counter reading becomes 3,000 Hz.
Specified Value: 2,910 to 3,090 Hz
3. Confirm that the frequency at the beginning and that at the endof tape winding are between 2,955 to 3,045 Hz.
Adjustment Location:
frequency countertest tape WS-48A(3 kHz, 0 dB)
set
HEADPHONE boardPHONES jack (JK401)
–+
32 Ω
CAPSTAN/REELmotor (M201)
Tape SpeedAdjustment
Adjustment Location: Record/Playback Head.
Note: Refer to “3-8. Cassette Lid” (see page 11)
adjustment screw
14
HCD-EP303
TUNER SECTION 0 dB=1 µV
[AM]Setting:Function : TUNERBand switch : AM
[FM]Setting:Function : TUNERBand switch : FM
• Repeat the procedures in each adjustment several times, and the frequencycoverage and tracking adjustments should be finally done by the trimmercapacitors.
AM RF signal generator
30% amplitudemodulation by400 Hz signalOutput level: as low as possible
Put the lead-wireantenna close to the set.
+–
level meter
set
32 Ω
HEADPHONE boardPHONES jack (JK401)
FM RF signalgenerator
22.5 kHz frequencydeviation by 400 HzsignalOutput level: as low as possible
+–
level meter
set
32 Ω0.01 µF
MAIN boardFM ANT
HEADPHONE boardPHONES jack (JK401)
digital voltmeter
100 kΩMAIN boardTP10 (FM VT)TP11 (AM VT)
no mark : Except AEP, UK models< > : AEP, UK models
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation530 kHz
1.5 ± 0.2 V<531 kHz>
T1021,710 kHz 7.7 ± 0.3 V
<1,602 kHz> <7.3 ± 0.3 V>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L110 600 kHz <603 kHz>
TC102 1,400 kHz <1,404 kHz>
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L104 87.6 MHz 2.1 ± 0.2 V
Confirmation 108 MHz 7.0 ± 0.4 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L103 89.9 MHz
TC101 105.9 MHz
Adjustment Location: MAIN board (See page 15)
15
HCD-EP303
Adjustment Location and Connecting Points
– MAIN BOARD (Component Side) –
L104 FM FrequencyCoverage Adjustment
T102AM Frequency Coverage Adjustment
AM Tracking L110Adjustment TC102
FM Tracking TC101Adjustment L103
– MAIN BOARD (Conductor Side) –
TP10(FM VT)
TP11(AM VT)
IC101
16
HCD-EP303SECTION 6DIAGRAMS
6-1. Circuit Boards Location
MAIN board
LED board
HEADPHONE board
CASSETTE board DISPLAY board
POWER board
1717
HCD-EP303
Note on Schematic Diagram:• All capacitors are in µF unless otherwise noted. p: pF.
50 WV or less are not indicated except for electrolyticsand tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.• 2 : nonflammable resistor.• C : panel designation.
Note on Printed Wiring Board:• W : indicates side identified with part number.• : Pattern from the side which enables seeing.(The other layers' patterns are not indicated.)
• Indication of transistor
• A : B+ Line.• H : adjustment for repair.• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-tion tolerances.
• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.no mark : FM< > : CD (STOP)
• Circled numbers refer to waveforms.• Signal path.
F : FMf : AME : PB (TAPE)a : REC (TAPE)J : CD PLAY
• AbbreviationE51 : Chilean and Peruvian model.MY : Malaysia model.SP : Singapore model.AR : Argentine model.MX : Mexican model.AUS : Australian model.
Note:The components identi-fied by mark 0 or dottedline with mark 0 are criti-cal for safety.Replace only with partnumber specified.
Note:Les composants identifiés parune marque 0 sont critiquespour la sécurité.Ne les remplacer que par unepiéce portant le numérospécifié.
6-12. IC Pin Function Description• IC601 µPD753016AGC-F37-3B9 SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER (DISPLAY BOARD)
I/O
O
O
O
I
O
O
O
O
—
O
O
O
O
I
O
O
I
I
I
I
I
O
O
O
O
I
O
O
I
—
I
O
—
I
O
I
I/O
—
I
I
I
O
Description
Segment drive signal output to the liquid crystal display (LD621)
Common drive signal output to the liquid crystal display (LD621)
Bias output for the liquid crystal display drive
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
Power on/off control signal output for the tuner section “L ”:power on
Audio line muting on/off control signal output “L ”:muting on
Power on/off control signal output for the CD section “L ”:power on
LED drive signal output of the TIMER indicator (D619)“L ”:LED on
Ground terminal
Reset signal output to the CD section “L ”:reset
Not used (pull up)
PLL serial data transfer clock signal output to the FM/AM PLL (IC102)
PLL serial data output to the FM/AM PLL (IC102)
FM and AM signal meter voltage detection input from the LA1823 (IC101)
Serial data transfer clock signal output to the LC75392 (IC203)
Serial data output to the LC75392 (IC203)
FM stereo detection signal input from the LA1823 (IC101)“L ”:stereo
Serial data transfer clock signal input from the CD section
Serial data transfer clock signal input from the RDS decoder (IC604) (not used)
Remote control signal input from the remote control receiver (RM601)
Recording on detection signal input
Audio line muting on/off control signal output “H ”:muting on
PLL chip enable signal output to the FM/AM PLL (IC102)“H ” active
Chip enable signal output to the LC75392 (IC203)“H ” active
Not used (open)
Serial data input from the RDS decoder (IC604) (not used)
System power on/off control signal out “H ”:power on
Mega bass on/off selection signal output “H ”:mega bass on
CD lid open/close detection switch (SW600)input terminal “L ”:CD lid is closed
Power supply terminal
Power failure detection input terminal “L ”:power failure,“H ”:power on
Not used (open)
Internal connection terminal (connected to power supply)
Main system clock input terminal (6 MHz)
Main system clock output terminal (6 MHz)
PLL serial data input from the FM/AM PLL (IC102)
Two-way data bus with the CD section
Not used (open)
Not used (fixed at “H ”)
Key return signal input from the key matrix “L ” input when key pressing
System reset signal input from the reset signal generator (IC603)“L ”:reset
For several hundreds msec.after the power supply rises,“L ” is input,then it changes to “H ”
Segment drive signal output to the liquid crystal display (LD621)
Pin Name
S12 to S31
COM0 to COM3
BIAS
VLC0 to VLC2
TUNER
TAPE
CD
TIMER STATUS
VSS
CD-RESET
SURROUND
PLL CL
PLL DI
TUNER SD
CLOCK
DATA
STEREO
CD CLOCK
RDS CLOCK
REMOTE
SYNCRO
MUTE
PLLCE
CE
SHRST
RDS DATA
PSW
BASS BOOST
DPSW2/SLEND
VDD
XT1
XT2
IC
X1
X2
PLLDO SELECT
CD DATA
NC
12/24H SELECT
KEY R0 to KEY R4
CPU RESET
S0 to S11
Pin No.
1 to 20
21 to 24
25
26 to 28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64 to 67
68
69 to 80
NOTE:• -XX, -X mean standardized parts, so they may
have some differences from the original one.• Items marked “*” are not stocked since they
are seldom required for routine service. Somedelay should be anticipated when ordering theseitems.
• The mechanical parts with no reference numberin the exploded views are not supplied.
• Hardware (# mark) list and accessories andpacking materials are given in the last of this partslist.
32
HCD-EP303SECTION 7
EXPLODED VIEWS
The components identified by mark 0 ordotted line with mark 0 are critical for safety.Replace only with part number specified.
Les composants identifiés par une marque0 sont critiques pour la sécurité.Ne les remplacer que par une pièce portantle numéro spécifié.
• AbbreviationCND : Canadian model.E51 : Chilean and Peruvian model.MY : Malaysia model.SP : Singapore model.
AR : Argentine model.MX : Mexican model.AUS : Australian model.
7-1. Cabinet Section
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
12
5
12
11
9
8
7
6
#1
#1 #4
#2
#2
#2
#2 #3
#5
Front panel sectionTR401
F401F402
CD cabinet section
#3
#3
#1
3
1 3-451-162-00 WASHER2 4-235-952-01 AC CORD HOLDER3 1-500-712-11 CORE, FERRITE (AEP,UK)5 A-4676-971-A MAIN BOARD, COMPLETE (AEP,UK)5 A-4729-806-A MAIN BOARD, COMPLETE (EXCEPT AEP,UK)
06 1-555-750-00 CORD, POWER (AEP,E51,MY,SP)06 1-696-535-11 CORD, POWER (UK)06 1-696-966-31 CORD, POWER (AUS)06 1-783-525-31 CORD, POWER (MX)06 1-783-820-11 CORD, POWER (US,CND)
56 4-240-240-01 CASS LID WINDOW57 4-240-274-01 CASS LID58 4-240-246-01 CASS LID BKT.59 4-235-981-01 CASS LID SPRING60 4-240-247-01 MAIN PWB MOUNT ING BKT.A
0TR401 1-437-816-11 TRANSFORMER, POWER (EXCEPT US, CND, MX)
0TR401 1-437-818-11 TRANSFORMER, POWER (US, CND, MX)
POWER
The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.
Les composants identifiés parune marque 0 sont critiquespour la sécurité.Ne les remplacer que par unepièce portant le numéro spécifié.
Ver 1.1 2002.11
43
HCD-EP303
MEMO
HCD-EP303
REVISION HISTORY
Clicking the version allows you to jump to the revised page.Also, clicking the version at the upper right on the revised page allows you to jump to the next revisedpage.
Ver. Date Description of Revision
1.0 2002.03 New
1.1 2002.11 Correction of parts supply classification of tape mechanism deck