DVD/CD RECEIVER SERVICE MANUAL MODEL: LH-T6745 LH-T6745D LHS-T6745C, LHS-T6745W, LHS-T6745T SERVICE MANUAL LH-T6745 (LH-T6745D LHS-T6745C, LHS-T6745W, LHS-T6745T) CD-R/RW
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Transcript
-
DVD/CD RECEIVERSERVICE MANUAL
MODEL: LH-T6745LH-T6745DLHS-T6745C, LHS-T6745W, LHS-T6745T
SE
RV
ICE
MA
NU
AL
LH
-T6745 (L
H-T
6745D L
HS
-T6745C
,LH
S-T
6745W,L
HS
-T6745T
)
CD-R/RW
-
- 1-1 -
[CONTENTS]
❍ SECTION 1.GENERAL• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
❍ SECTION 2. AUDIO PART
• ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
• WIRNG DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
• PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
❍ SECTION 3.DVD PART
• DVD PART ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
• DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING . . . . . . . . . . . . . . . . .3-8
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
• DVD PART SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25
❍ SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
❍ SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
❍ SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
-
- 1-2 -
SECTION 1. GENERAL❏ SERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage
1) 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 and
impact. 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, a cottonswab 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.(Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too muchof this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
Storage in conductive bag Drop impact
NEVER look directly at the laser beam, and don’t let contact fingers or other exposed skin.
Magnet
How to hold the pick-up
Conductive Sheet
Cotton swab
Pressure
Pressure
-
- 1-3 -
NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components
are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, componentscan 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 must betaken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnet-ism 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 Ω)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent sta-
tic 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.
Resistor(1 Mohm) Conductive
Sheet
Resistor(1 Mohm)
Armband
-
- 1-4 -
❏ ESD 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 conductive sur-face 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 ALLOTHER SAFETY 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 can gen-erate static electricity sufficient to damage an ESD device).
CAUTION. GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, ISINTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DAN-GEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OFELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.
-
- 1-5 -
❏ SPECIFICATIONS
-
- 1-6 -
MEMO
-
- 2-1 -
❏ ELECTRICAL TROUBLESHOOTING GUIDE
INSERTPOWER CORD.
TURN ONTHE RED LED?
IS POWER ON?
CHECK POWER PLUGAND POWER SUPPLY CIRCUIT.
DOES INITIALREAD WORK?
DOES IT PLAY?
YES
NO
YES
YES
OK
NO
YES
NO
NO
CHECK POWER SUPPLY CIRCUIT.
CHECK LASER CIRCUIT.
CHECK TRACKING SERVO CIRCUIT.
TURN POWER ON.
CHECK FOCUS CIRCUIT.
CHECK DISC.
DOES IT OUTPUTAUDIO?
YES
NO CHECK AUDIO CIRCUIT.
1. Power check flow
SECTION 2. AUDIO PART
-
- 2-2 -
2.AUDIO µ.COM CIRCUIT
POWER ON
Does it appearDVD Error at
FLD?
Does AV 1/2, TV, AUDIO, OPTICAL IN, COAXIAL IN, FM87.5
appear at FLD?
CheckConnector(PN902)if
is normally.
Check power partof Main B/D.
Check oscillatorof x101.
Check if IC101PIN1 is High.
Check if IC101PIN11 is High.
Check if IC101 PIN17, 46, 72, 90 is high
(5V).
Check if IC101PIN26 is High.
Replace IC101.
Does CD/DVDappear at FLD?
Reconnet it.
Refer to SMPS
OK.
Refer to oscillatorCircuit.
Check DVD Reset Waveform.
Check IC101 Reset Wavefrom.
Check 5V line.
Check Power dection Circuit.
Does LOADINGappear at FLD?
Does no Disc orTime appear at FLD?
Check if DVD an Audio Micom Interface is OK.
Check power.
Check DVD Module.
Check SMPS.
-
- 2-3 -
3.FRONT CIRCUIT (1/2)
POWER ON
TURN ONTHE GREEN LED?
IS DIGITRONON NORMALLY?
Check IfAll Buttens
Are OK.
Check IfThe volume is
OK.
Check IfThe headphone
is OK.
Check IfThe Remocon
is OK.
FRONT B/D OK.
When it is needed to reconnect FFC cable into PN103/PN104,short ZD 902 + and screw(chassis GND) near to ZD902.PN104 pinsPIN2 : -27.5VPIN3 : -23.0VPIN4 : 5.0VPIN11 : -34.0V
Check IFTHE PN103/PN104
IS OK?
Check IF theFRONT POWER
IS OK(*2)
RECONNECT.(REFER TO NOTICE *1)
REFER TO SMPS PART.
Check IFThe VFD001 PINS
ARE OK.
CHECK PATTERNAND RESOLDERING.
-
- 2-4 -
4.FRONT CIRCUIT (2/2)
Check ifThe Power part of the
Front is OK.
Check ifThe Power part of the
Front is OK.
Check ifR036~R040
OK.
Check ifPN104 pin13, 15
waveform OK.
Check ifR032, R033
OK.
REFER TOMICOM CIRCUIT.
REPLACER036~R040.
REFER TOPOWER(SMPS).
REFER TOPOWER(SMPS).
REFER TOMICOM CIRCUIT.
REPLACER032, R033.
Check ifthe power part of the
Front is OK.
Check ifThe PN104 pin17
is Low.
REFER TOPOWER (SMPS).
REFER TOPOWER (SMPS).
REFER TOPOWER (SMPS).
REFER TOPOWER (SMPS).
Check if Headphone jackin JK001 is OK.
REFER TOMICOM CIRCUIT. CHECK MAN B/D.
Check ifthe power part of the
Front is OK.
Check ifthe RMC001 volume
is OK(5V).
Check ifthe Remocon
Waveform of the PN104 pin7.
Replace RMC001.Check RMC
Circuit.
-
❏ BLOCK DIAGRAM
2-5 2-6
-
2-7 2-8
❏ SCHEMATIC DIAGRAMS
• FRONT SCHEMATIC DIAGRAM
-
2-9 2-10
• MICOM SCHEMATIC DIAGRAM
-
2-11 2-12
• I//O SCHEMATIC DIAGRAM
-
2-13 2-14
• DSP SCHEMATIC DIAGRAM
-
2-15 2-16
• AMP SCHEMATIC DIAGRAM
-
2-17 2-18
• SMPS-WIDE SCHEMATIC DIAGRAM
-
2-19 2-20
• POWER SCHEMATIC DIAGRAM
-
2-21 2-22
❏ WIRING DIAGRAMS
-
2-23 2-24
❏ PRINTED CIRCUIT DIAGRAMS
• MAIN P.C. BOARD (COMPONENT SIDE)
-
2-25 2-26
• MAIN P.C. BOARD (SOLDER SIDE)
-
2-27 2-28
• FRONT P.C.BOARD (SOLDER SIDE)
• FRONT P.C.BOARD (COMPONENT SIDE)
-
2-29 2-30
• POWER P.C.BOARD
-
2-31 2-32
MEMO MEMO
-
- 3-1 -
Power ON
Does CD/DVDappear at FLT?
Does LOADINGappear at FLD?
Does no Disc or Time appear at FLD?
Check if DVD an AudioMicom lnterface is OK.
Check power.
Check DVD Module.
Check Connector PN504.
Check voltageeach pin for PN504.
Check mainboard regulator
Reconnect it.
Reconnect it.
Reconnect it.
Does AUXFM87.5 appear
at FLD?
Does it appearDVD Error at
FLD?
CheckConnector(PN650)if
is normally.
CheckConnector PN653.
CheckConnector PN654.
1. Power check flow
❏ ELECTRICAL TROUBLESHOOTING GUIDE
SECTION 3. DVD PART
-
- 3-2 -
2. System operation flow
Power On
1. 8032 initializes SERVO, DSP & RISC registers2. Write RISC code to SDRAM3. Reset RISC
Show LOGO
Tray Closed?
Tray Close to Closed position
NO
SLED at InnerSide ?
SLED Moves to Inner Positi on
NO
YES
YES
Reci eveOPEN/CLOSE
Key?
1. Execute Pressed Key & IR Key2. System operation Routine Loop
NO
1. Stop Playback & Open Tray2. Display tray open message & LOGO
ReceiveCLOSE Key?
NO
YES
YES
1. Judge whether have disc and disc type2. Jump to related disc reading procedure
-
- 3-3 -
3. Test & debug flow
TEST
Check the AC VoltagePower PCBA(110V or 220V)
NO Replace power PCBA orAC transformer.
YES
Switch on the Power PCBA
Is the DC Voltageoutputs OK?
(5V,1.8V,3.3V,8V,12V)Repair or Replace Power PCBA
NO
Make sure the main PCBA don'tshort on VCCs and switch it on.
YES
Is 3.3V and 1.8V DCoutputs normal on main
PCBA?
Check the regulators or related diodes.NO
YES
Connect to PC RS232 Cable andupdate the FLASH memory code.
Update FLASHsuccessfully?
A
YES
NO
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD,RWR.
4. Check RS232 SIGNALS.
5. Check FLASH Memory related circuit.
-
- 3-4 -
A
RESET or Power On.
NO NO
YES
NO
YES
NO
YES
YES
B
NO
NO
NO
YES
YES
NO
NO
YESYES
YES
Show LOGO? Flash Memory operatesproperly?
Check connection lines between FLASH& MT1389 and the FLASH access timewhether is suitable or not.
SDRAM works properly?Check connection lines betweenSDRAM & MT1389 and the SDRAMis damaged.
MT1389 VIDEO outputsproperly?
Check the related circuit of MT1389.
Have TV signal output? Check the filtering and amp circuit ofTV signal.
Check AV cable connectionto TV set.
Does Tray moveinside when it is notat closed position?
Normal TROUT &TRIN signals?
Check the load OPEN & CLOSEswitch
Normal TRCLOSE &TROPEN signal?
Normal LOAD+ &LOADsignal?
Check the cable connectionbetween main PCBA and loader.
Check the Tray control IO pins onMT1389 & IP4504.
Check the Tray control amplifyingcircuit on Motor driver.
-
- 3-5 -
B
NO NO
NO
NO
NO NO
NO
YES YES
YES
YES
YESYES
YES
Doesthe SLED move
to inner side when it is atoutter position?
Motor Driver STBYPin is High?
Check the connection line ofSTBY signal.
Is FMSO DC Level higherthan 1.4V?
Check the related circuit ofFMSO.
SL+ and SL- outputproperly?
Check the amp circuit on motordriver.
Check the cable connection withMECHA.
Do not put in disc and trayclose.
C
Optical Lens hasmovements for searching
Focus?
Proper FOSO outputsto motor driver?
Check FOSO connection onMT1389 and motor dirver.
Proper F+ & F- outputs?Check the amp circuit on motordirver.
Check cable connect on withpick-up head.
-
- 3-6 -
D
C
YES
NO
YESYES
NO NODoes spindle rotate? Proper DMSO signal on
MT1389
Check DMSO relatedcircuit on MT1389.
SP+ & SP- outputproperly?
Check the spindle controlamp circuit of motordriver.
Check the cable connectionbetween spindle and main PCBA.
YES
YES
NO NO
Laser turns on whenreading disc?
NO NO
YES
NO
YES
YES
NO
LD01 or LD02 outputproperly?
Check the laser power circuiton MT1336 and connecting topower transistor.
Collector voltage ofpower transistor is OK?
Check the related circuit onlaser power transistor
Check cable connection betweentransistor ouput and pick-uphead.
Put disc in? Laser off
Disc ID is correct? Proper RFL signalon MT1389?Check the related circuiton MT1389 RFL signal.
Check LDO1 & LDO2 signal
YES
-
- 3-7 -
YES
NO
YES
YES
D
NO NO
NO
YES
NO
E
YES
Normal TEO Signal onMT1389?
Check the relatedcircuit on MT1389Track On OK?
Properly TRSO signalon MT1389?
T+ & T- outputproperly?
Check the TRSOconnection on MT1389
and motor dirver.
Check the tracking controlamp circuit on motor
driver.
Check cable connection onpick-up head.
Disc is play ? Check RFO & RFLVL signal waveform.
NO NO
YESYES
YES
Focus ON OK?Proper signals onA,B,C,D of MT1389
Check connections betweenMT1389 and pick-up head.
Check FEO signalon MT1389
Check FOSO signal on MT1389
Check the FOSO connection onMT1389 and motor driver.
YES
NO
-
- 3-8 -
Normal IR.VFD & Frontpannel key functions?
Communications betweenIR.VFD Front pannelkey & MT1389
is normally?
Check communication lines onMT1389.
NO
YES
Check the cable connection onFront pannel.
TEST END
YES
Normal Audio outputwhen disc playback?
Audio PWM IC receivedcorrect data stream?
Check connection between MT1379& Audio PWM IC.
Normal Audio PWM ICout?
Check the relatedcircuit of Audio PWM IC.
Check Audio filter,amplify,mutecircuit.
NO NO
NO
YES
YES
YES
E
NO
-
- 3-9 -
FIG 1-1
FIG 1-2
❏ DETAILS AND WAVEFORMS ON SYSTEM TESTAND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL
1) MT1379 main clock is at 27MHz(X501)
2) MT1336 reset is high active
-
- 3-10 -
FIG 1-3
FIG 1-4
3) RS232 waveform during procedure(Downloading)
4) Flash R/W enable signal during download(Downloading)
-
- 3-11 -
FIG 2-1
FIG 3-1
2. SDRAM CLOCK
1) MT1379 main clock is at 27MHz(X501)
3. TRAY OPEN/CLOSE SIGNAL
-
- 3-12 -
FIG 4-1
FIG 5-1
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)
5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)
-
- 3-13 -
FIG 6-1
FIG 7-1
6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)
7. DISC TYPE JUDGEMENT W VEFORM
-
- 3-14 -
FIG 7-2 (DVD)
FIG 7-3 (CD)
-
- 3-15 -
FIG 7-4 (CD)
FIG 8-1 (DVD)
8. FOCUS ON W VEFORM
-
- 3-16 -
FIG 8-2 (CD)
FIG 9-1
9. SPINDLE CONTROL W VEFORM (NO DISC CONDITION)
-
- 3-17 -
10. TRACKING CONTROL RELATED SIGNAL(System checking)
FIG 10-1 (DVD)
FIG 10-2 (CD)
-
- 3-18 -
FIG 11-1 (DVD)
FIG 12-1
11. MT1389 AUDIO OPTICAL AND COAXIAL INPUT (SPDIF)
12. MT1389 VIDEO OUTPUT WAVEFORM1)100%
-
- 3-19 -
ADAT0~3
FIG 12-2
FIG 13-1
2) COMPOSITE VIDEO SIGNAL
13. MT1389 AUDIO OUTPUT TO PWM IC
-
- 3-20 -
FIG 14-1
14. AUDIO OUTPUT FROM PWM IC
-
- 3-21 -
❏ BLOCK DIAGRAM1. Overall Block Diagram
M
M
DIS
C
SP
IND
LE
MO
TO
R
LO
AD
ING
MO
TO
R
DECK MECHANISM
DV
D :
A,B
,C,D
,RF
0C
D :
A,B
,C,D
,E,F
,RF
0C
DM
DI,D
VD
MD
IP
ICK
UP
KE
Y In
pu
t
6MH
z
B/P
b
IC60
2M
X29
LV
160T
2/4M
16/3
2BIT
FL
AS
H R
OM
M-RESET
ROMAD[0:19]ROMRDROMWR
MD[00:15]
FL
FR
CVBS
R/P
rG
/YR
LR
RC
EN
TE
RW
OO
FE
R
TV_DAC[0:3] Y C
FL
FR
RL
RR
CE
NT
ER
WO
OF
ER
VF
+
AC
90V
~240
V50
HZ
/60H
z
VF
-
-27V
A
5V
VD
33,V
D33
D
12V
27M
Hz
PW
RC
TL
3.3V
-M1
IC60
6K
S24
C02
EE
PR
OM
IC70
1~4
DIG
ITA
LP
OW
ER
ICR
C90
1R
/C
IC90
3R
ES
ET
IC
LOAD[+,-]
FOCUS[+,-]TRACK[+,-]
SPINDLE[+,-]
SL
ED
(FE
ED
ING
)M
OT
OR
SLED[+,-]MV
D33
D
VD
33D
VD
18/V
D33
3V3M
IC60
5M
M16
23X
FB
EV
IDE
O B
UF
FE
R
RS
232_
TX
D
IECDAOUT
CO
AX
IAL
SP
DIF
D2_
T[1:
3]S
CA
RT
_16:
9R
GB
_SE
L
3V3M
CD
LD,D
VD
LD,S
VR
EF
21
5V/8
V
HO
ME
SW
INS
W,O
UT
SW
ROMDATA[0:7]
5.2V
A
IC10
1A
UD
IO M
ICO
M
M_R
EQ
PO
WE
RB
OA
RD
VFD_RXDS_REQ
5.2V
A
8V
DM
UT
E
IIC/V
FD
/DA
C_S
CK
IC60
34M
16B
IT4B
ank
SD
RA
M
VD
33D
MA
[00:
11]
DM
CLK
CS
JB
A0
BA
1D
QM
WE
JC
AS
JR
AS
J
IIC/V
FD
/DA
C_T
XD
IC60
1M
TK
MT
1389
+12
V
+12V
5V
YC_MIX
VID
EO
_SW
SE
R[0
:2],D
AC
_ML1
OP
EN
,CLO
SE
,SLE
GP
,SP
IND
LE,F
OC
US
,TR
AC
K,S
VR
EF
DA
C_R
ST
CD_DVD, VR_CD,VR_DVD CD_DVD_CT
XS
FG
N,X
SF
GP
CN
601
RS
232
Do
wn
load
RS232_RXD
3.3V
3.3V
-M
U7
VD
18
IC30
1P
S98
18(P
WM
IC)
IC20
1IP
4504
Mo
tor
Dri
veD
RV
SB
OPU_SEL
JAC
K
TR
IGG
ER
-27V
A/V
F+/
VF
-D
IG90
1F
LD
DIS
PL
AY
Pic
k-u
p
RF
+M
PE
G IC
-
- 3-22 -
2. SERVO Block Diagram
IC20
1IP
4504
Mo
tor
Dri
ver
DV
D: A
,B,C
,D, R
FO
C
D: A
,B,C
,D, E
, F,R
FO
SP
+, S
P-
M/D
PIC
KU
P
FO
SO
,TR
SO
,FM
SO
DM
SO
,,TR
OP
EN
AD
INF
+, F
-, T
+, T
-
SL+
, SL-
LOA
D+,
LO
AD
-
LD0
1, L
DO
2, I
OA
MD
I 1
AL
PC
V20
, PIC
KS
EL
LIM
IT,T
RIN
,TR
OU
T
TR
CLO
SE
ST
BY
,V1P
4
IC60
34M
x 1
6bit
SD
RA
MMA
[0:1
1]D
QM
0 ,D
QM
1W
E#,
CA
S#,
RA
S#
CS
#,B
A0,
BA
1S
DC
LKS
DC
KE
DQ[0:15]
FL
AS
HR
OM
PR
D#,
PW
R#
PC
E#AD
[0:7
]
A[0
:20]
EE
PR
OM
SC
L, S
DA
RS
232C
(MT
K)
RX
D, T
XD
X50
127
MH
zX
-TA
L
IC60
1M
T13
89D
VD
PL
AY
ER
ON
E C
HIP
-
- 3-23 -
3. MPEG & MEMORY Block Diagram
IC60
6E
EP
RO
M
IC60
1 (M
PE
G +
DS
P +
RF
)M
T13
89
IC60
2F
LAS
H M
EM
OR
Y(1
6 M
)
VID
EO
Inte
rfac
e
AU
DIO
Inte
rfac
e
AU
DIO
MIC
OM
IC60
3S
DR
AM
64M
DCLK,WE,CAS,RASCS,DCKE,MA[0:10]
DQM0,DQM1
DQ[0:15]
X50
127
MH
z
SC
L,S
DA
Y2(
Y),
Y3(
Col
or)
Y4(
Y),
Y5(
Cb)
,Y6(
Cr)
AS
PE
CT
(16:
9)
AC
LK,A
LRC
K,A
BC
K
MU
TE
,VS
CK
,VS
DA
AS
DT
A[0
:3]
AS
TB
,SC
L,S
DA
AS
PD
IFPWR,PCE,PRD
A[0:20]
AD[0:7]
VFD_SCKVFD_TXDM_REQ
SC
KO
,TX
DO
,M-R
EQ
URST,S_REQVFD_RXD
-
- 3-24 -
4. VIDEO & AUDIO Block DiagramIC
605
VID
EO
6dB
Am
p
IC60
1A
UD
IO D
AC
(2C
H)
IC30
1A
UD
IO D
AC
(5.1
CH
)
IC60
2(O
P A
mp)
LPF
&B
uffe
r
IC70
1D
igita
lP
OW
ER
IC
IC30
3 D
igita
lP
OW
ER
IC
IC30
4D
igita
lP
OW
ER
IC
CV
BS
CO
MP
ON
EN
T (R
.G.B
) / (Y
.Pb
.Pr
)
SU
PE
R V
IDE
O (Y
/C)
(R.G
.B)
/ (Y
.Pb.
Pr
)
(Y/C
)
DA
C R
ES
ET
AC
LK
SC
L
SD
A
DA
C R
ES
ET
AC
LK
SC
L
SD
A
AD
AT
A1
AD
AT
A2
AD
AT
A3
A/V
JAC
K
MP
EG
MP
EG
MP
EG
5.1C
H B
OA
RD
FR
ON
T
R
RE
AR
R
FR
ON
T
L
RE
AR
L
CE
NT
ER
WO
OFE
R
AU
DIO
L
AU
DIO
R
AD
AT
A3
-
3-25 3-26
❏ DVD PART SCHEMATIC DIAGRAMS
• MPEG SCHEMATIC DIAGRAM
-
3-27 3-28
• SERVO SCHEMATIC DIAGRAM
-
4-1 4-2
SECTION 4. EXPLODED VIEWS• CABINET AND MAIN FRAME SECTION
A50
250
305
263
A47
262
A44
260261
285
280
284
281
A26
322A46
TU101
288
A43A
283
282A43
NOTE) Refer to “SECTION 6 REPLACEMENTPARTS LIST” in order to look for the part number of each part.
-
4-3 4-4
• DECK MECHANISM EXPLODED VIEW
LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION
A26 6721RJ0856S DECK ASSEMBLY,AUDIO DECK/MECHA DP-7T-HZ-SAMSUNG DL
A01 4861R-0016D CLAMP ASSEMBLY DECK/MECHA DISC DP-7C(7A) -HZ
A02 3041R-M040A BASE ASSEMBLY MAIN DP-7T-HZ
A03 3041R-M063D BASE ASSEMBLY SLED DP-7T(A)-HZ -SAMSUNG DL3
001 3300R-0547A PLATE CLAMP
002 5016H-1016B MAGNET CLAMP(LDM-R608,10*5,1*1.5T)
003 4860R-0021A CLAMP UPPER DP7
004 4930R-0402A HOLDER CLAMP DP-7A
010 6850R-GK22Z CABLE,FLAT P=1.0 FFC UL2896(0.05X0.65) 11
011 3210R-M002A FRAME UP/DOWN MOLD DP7C
011A 6850R-JW16B CABLE,FLAT P=1.0 FFC UL2896(0.035X0.7) 23
012 5040R-0075B RUBBER DAMPER DP7 (CHUNG PUNG 30)
012 5040R-0075D RUBBER DAMPER DP7 (YAMAUCHI 30)
013 4400R-0006B BELT DECK/MECHA DP2-5, DP7C,DP7A OT
014 4470R-0055A GEAR PULLEY
015 6871RJ4415A PWB(PCB) ASSEMBLY,JACK PWB(PCB) TOTAL LOADING-HZ
015A 4681R-1023G MOTOR ASSEMBLY DECK/MECHA LOADING-HZ
015B 4560R-0008A PULLEY MOTOR
015C 4680HP2001A MOTOR(MECH) RF-300CH-11440(SHAFT 6.05L)M/C
015C 4680R-E009A MOTOR(MECH) FEEDING RF300EH-1D390 MABUCHI
017 4470R-0056A GEAR LOADING
018 4974R-0023A GUIDE UP/DOWN
020 3040R-D005A BASE MAIN DP-7T MOLD (SLIM)
021 4680R-C011A MOTOR(MECH) SPINDLE JCL9B68 SANKYO FOR COM
022 4681R-0034D MOTOR ASSEMBLY DECK/MECHA FEEDING DP-7C(7A) -
024 4470R-0131A GEAR PINION DP7C
024A 5006R-0044A CAP SKEW-T DP7C
024B 5006R-0043A CAP SKEW DP7C
025 4470R-0130A GEAR MIDDLE DP7C
026 3390R-0026A TRAY DVD DP-7T MOLD DISC
028 4370R-0082B SHAFT DECK/MECHA PU R DP-7C OTHER
029 4370R-0082A SHAFT PU DP-7C
030 4471R-0013D GEAR ASSEMBLY DECK/MECHA RACK DP-7C(7A) -HZ
031 6716DPH007B PICK UP,DVD SOH-DL3 SAMSUNG PLAYER H/HIGHT
430 1SZZH-1003A SCREW,DRAWING + D2.0 6MM SWRCH16A/NIY 4.5MM
431 1SZZH-1007B SCREW,DRAWING + D2.0 6MM SWRCH16A/ZNBK 4MM 1
433 1SZZR-0050A SCREW,DRAWING + 1 D2.0 L4.5 SWRCH16A/ZNY S-T
435 1SZZR-0011A SCREW,DRAWING MACHINE
-
- 5-1 -
SECTION 5. SPEAKER PART
❏ MODEL: LHS-T6745W
952
953
954
956
955
951
950
A900
LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION REMARKS
950 5208RM0059A DUCT SPK LHS-T6540W MOLD CHROME PLA NSP
951 3720RMM013A PANEL,AUDIO SPK LHS-T6540W MOLD FRONT (SIL NSP
952 3701RM0110A NET ASSEMBLY SPK LHS-T6540W NET ASSY NSP
953 6400WSMK03A SPEAKER,WOOFER CW-210B150L-1 SAMMI WOOFER 4 O NSP
954 3091RMW107A CABINET ASSEMBLY SPK LHS-T6540W CABINET ASSY NSP
955 4766RM0110A FELT 63*115*2T BLACK DUCT EVA NSP
956 6871RU9251A PWB(PCB) ASSEMBLY,SUBSET(AUDIO ASSY FE-5000WE ROUND 2P TERMIN NSP
957 3610RM0009A FOOT LXS-330, EVA(BLACK) PHI15X1T, NSP
A900 6401RM0170A SPEAKER ASSEMBLY MSF-90SB90L SAMMI LHS-T6745W S
WIRE90 6871RU9271K PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-T6540W SUBWOOFER 5M ORANGE
-
- 5-2 -
❏ MODEL: LHS-T6745C
A700
751
752
753
750
757
756
754
755
LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION REMARKS750 3530RMP044B GRILLE LHS-E6740C PRESS BK 0.6T NSP751 3720RMM015A PANEL,AUDIO SPK LHS-E6740T/C MOLD FRONT NSP752 6400DSMX02A SPEAKER,TWEETER DT-11ND-1 SAMMI TWEETER(DOME) NSP753 6400WSMC05A SPEAKER,WOOFER MSF-90SB90L SAMMI WOOFER 6 OHM NSP754 3110RMP072A CASE LHS-E6740C MOLD REAR NSP755 6871RU0038A PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-C640/T6745/E740 STANDARD 2 NSP756 3040RMP036A BASE LHS-E6740C MOLD BOTTOM STAND NSP757 3610RM0044A FOOT SPK LHS-T6540T/C OTHER EVA PHI NSP
A700 6401RM0169A SPEAKER ASSEMBLY MSF-90SB90L SAMMI LHS-T6745C SWIRE70 6871RU9271C PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-D6230T CENTER WIRE(5M)/ (G
-
- 5-3 -
❏ MODEL: LHS-T6745T
A800
852
850
851
853
856
854
855
856
LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION REMARKS850 3530RMP044A GRILLE LHS-E6740T PRESS BK 0.6T NSP851 3720RMM015A PANEL,AUDIO SPK LHS-E6740T/C MOLD FRONT NSP852 6400DSMX02A SPEAKER,TWEETER DT-11ND-1 SAMMI TWEETER(DOME) NSP853 6400WSMC05A SPEAKER,WOOFER MSF-90SB90L SAMMI WOOFER 6 OHM NSP854 3110RMP073A CASE LHS-E6740T MOLD REAR NSP855 6871RU0038A PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-C640/T6745/E740 STANDARD 2 NSP856 3040RMP037A BASE LHS-E6740T MOLD BOTTOM STAND NSP857 3610RM0044A FOOT SPK LHS-T6540T/C OTHER EVA PHI NSP
A800 6401RM0168A SPEAKER ASSEMBLY MSF-90SB90L SAMMI LHS-T6745T SWIRE80 6871RU9271A PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-D6230T FRONT WIRE(5M) R CHWIRE81 6871RU9271B PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-D6230T FRONT WIRE(5M)/ L CWIRE82 6871RU9271D PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-D6230T REAR WIRE(10M) R/CHWIRE83 6871RU9271E PWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-D6230T REAR WIRE(10M)/ L/C
-
- 5-4 -
MEMO
SECTION 4. EXPLODED VIEWS. CABINET AND MAIN FRAME SECTION. DECK MECHANISM EXPLODED VIEWSECTION 5. SPEAKER PARTMODEL: LHS-T6745W. MODEL: LHS-T6745C. MODEL: LHS-T6745T
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