DOWNLOAD Sharp LC-32GD8EK (serv.man10) Service Manual ↓ Size: 336.25 KB | Pages: 17 in PDF or view online for FREE

Model
LC-32GD8EK (serv.man10)
Pages
17
Size
336.25 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Tables
File
lc-32gd8ek-sm10.pdf
Date

Sharp LC-32GD8EK (serv.man10) Service Manual ▷ View online

43
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
28
LC-32/37GD8E/RU
LC-32/37BT8E/RU
No sound from external input devices (2)
No sound from an external 
input device connected to 
EXT1 (SCART1).
No sound from an external 
input device connected to 
EXT2 (SCART2).
No sound from an 
external input device 
connected to EXT3.
No sound from EXT4 
(AUDIO) connecting an 
external input device.
No sound from EXT5 
(AUDIO) connecting an 
external input device.
YES
<EXT1>
Is IN1-L audio signal sent 
from pin (6) of SCART1 
terminal (J1101) to pin 
(14) of IC3002 (VCT)?
Is IN1-R audio signal sent 
from pin (2) of SCART1 
terminal (J1101) to pin 
(13) of IC3002 (VCT)?
<EXT2>
Is IN2-L audio signal sent 
from pin (27) of SCART2 
terminal (J1101) to pin 
(12) of IC3002 (VCT)?
Is IN2-R audio signal sent 
from pin (23) of SCART2 
terminal (J1101) to pin 
(11) of IC3002 (VCT)?
<EXT3>
Is IN3-L audio signal 
sent from pin (3) of 
J1201 terminal to pin 
(16) of IC3002?
Is IN3-R audio signal 
sent from pin (5) of 
J1201 terminal to pin 
(15) of IC3002?
Is the audio signal 
properly sent from pins 
(28) and (27) of IC3002?
Check IC3002 or 
peripheral circuits.
Is the audio signal of 
pins (1) and (7) of IC303 
(OP-AMP) sent properly?
Check IC303 or 
peripheral circuits.
<EXT4>
Is D-SUB-L audio signal 
sent from J2702 to pin 
(15) of IC2704?
Is D-SUB-R audio signal 
sent from J2702 to pin 
(2) of IC2704?
Is D-SUB-L audio signal 
sent to pin (10) of 
IC3002?
Is D-SUB-R audio signal 
sent to pin (9) of 
IC3002?
<EXT5>
Is HDMI-L audio signal 
sent from J2701 to pin 
(14) of IC2704?
Is HDMI-R audio signal 
sent from J2701 to pin 
(5) of IC2704?
Check pins (6) and 
(2) of SCART1 and 
connection to an 
external input 
device.
Check pins (27) and 
(23) of SCART2 and 
connection to an 
external input 
device.
Check pins 3 
(J1201) and 5 
(J1201) of EXT3 
and connection to 
an external input 
device.
Is HDMI-L audio 
signal sent to pin 
(10) of IC3002?
Is HDMI-R audio 
signal sent to pin (9) 
of IC3002?
Is the audio output 
signal of pins (13) and 
(16) of IC302/IC301 
(MAIN-AMP) normal?
Check IC302/IC301 
(MAIN-AMP),
HEADPHONE and 
peripheral circuits.
Check CONNECTOR 
(P301) and Speaker 
(right and left).
YES
YES
NO
NO
Check output of pins 
(13) and (3) of 
IC2704 and 
peripheral circuits.
NO
Check that Option-
HDMI Setup-Audio 
select is set to 
"Analog".
YES
YES
YES
OK
NO
YES
YES
YES
NO
YES
NO
NO
TROUBLESHOOTING TABLE
 (Continued)
Troubleshooting Table (continued)
44
 LC-26GA5E
 LC-32GA5E
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
29
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
No sound except from speakers (3)
Check audio input signal of pin (31) of IC3002 (VCT), pins (18) 
and (33) of the power line, pins (84) and (83) of I2C-LINE, and 
peripheral circuits.
NO
NO
NO
NO
No audio output from the 
headphones
No audio output from EXT1 
(SCART) terminal.
NO
Is there audio output on pins 
(2) and (3) of the headphone 
terminal (J1301)?
Checklist:
1) Is the MUTE button on the remote control set to ON? ··· Set to OFF.
2)
 Check the connection to external devices. ··· Is there any improper connection?
Is audio input/output signal of 
pins (3) and (5)/(1) and (7) of 
IC303 (OP-AMP) normal?
NO
NO
YES
YES
NO
YES
NO
NO
NO
YES
YES
Is audio output signal (SPK-
OUT L/R) properly sent from 
pins (28) and (27) of IC3002 
(VCT)?
Check the connection to 
EXT1 (J1101) and external 
devices.
Check the connection to 
EXT2 (J1101) and external 
devices.
Is S-MUTE-LINE [IC1710 (pin 
100)] or S2-MUTE-LINE 
[IC3003 (pin 26)] at H?
(Check Q1102/Q1101 
operation.)
Is audio signal sent from pins 
(22) and (21) of IC3002?
Check the audio signal 
output line from pins (22) and 
(21) of IC3002 to 
Q1103/Q1104/Q1201/Q1202.
Check the connection to 
AUDIO OUTPUT terminal 
(J1201) and external devices.
Is S-MUTE-LINE [IC1710 (pin 
100)] at H?
(Check Q1204/Q1203 
operation.)
Is audio signal sent to pins 
(3) and (1) of EXT1 (J1101)?
Is S-MUTE-LINE [IC1710 
(pin 100)] at H?
(Check Q1106/Q1105 
operation.)
Is audio signal sent from 
pins (24) and (23) of 
IC3002?
Check the audio signal 
output line from pins (24) 
and (23) of IC3002 to pins 
(3) and (1) of EXT1.
Check the power supply 8/5 
V pins (18) and (33) of 
IC3002 and peripheral 
circuits.
Is audio signal sent to pins 
(24) and (22) of EXT2 
(J1101)?
Is audio signal sent to pins 
(13) and (15) [L/R (white) 
(red)] of AUDIO OUTPUT 
terminal (J1201)?
No audio output from EXT2 
(SCART) terminal.
No audio output from AUDIO 
OUTPUT terminal.
 Is the MUTE button on the 
 remote control set to ON? 
 ... Set to OFF.
29
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
No sound except from speakers (3)
Check audio input signal of pin (31) of IC3002 (VCT), pins (18) 
and (33) of the power line, pins (84) and (83) of I2C-LINE, and 
peripheral circuits.
NO
NO
NO
NO
No audio output from the 
headphones
No audio output from EXT1 
(SCART) terminal.
NO
Is there audio output on pins 
(2) and (3) of the headphone 
terminal (J1301)?
Checklist:
1) Is the MUTE button on the remote control set to ON? ··· Set to OFF.
2)
 Check the connection to external devices. ··· Is there any improper connection?
Is audio input/output signal of 
pins (3) and (5)/(1) and (7) of 
IC303 (OP-AMP) normal?
NO
NO
YES
YES
NO
YES
NO
NO
NO
YES
YES
Is audio output signal (SPK-
OUT L/R) properly sent from 
pins (28) and (27) of IC3002 
(VCT)?
Check the connection to 
EXT1 (J1101) and external 
devices.
Check the connection to 
EXT2 (J1101) and external 
devices.
Is S-MUTE-LINE [IC1710 (pin 
100)] or S2-MUTE-LINE 
[IC3003 (pin 26)] at H?
(Check Q1102/Q1101 
operation.)
Is audio signal sent from pins 
(22) and (21) of IC3002?
Check the audio signal 
output line from pins (22) and 
(21) of IC3002 to 
Q1103/Q1104/Q1201/Q1202.
Check the connection to 
AUDIO OUTPUT terminal 
(J1201) and external devices.
Is S-MUTE-LINE [IC1710 (pin 
100)] at H?
(Check Q1204/Q1203 
operation.)
Is audio signal sent to pins 
(3) and (1) of EXT1 (J1101)?
Is S-MUTE-LINE [IC1710 
(pin 100)] at H?
(Check Q1106/Q1105 
operation.)
Is audio signal sent from 
pins (24) and (23) of 
IC3002?
Check the audio signal 
output line from pins (24) 
and (23) of IC3002 to pins 
(3) and (1) of EXT1.
Check the power supply 8/5 
V pins (18) and (33) of 
IC3002 and peripheral 
circuits.
Is audio signal sent to pins 
(24) and (22) of EXT2 
(J1101)?
Is audio signal sent to pins 
(13) and (15) [L/R (white) 
(red)] of AUDIO OUTPUT 
terminal (J1201)?
No audio output from EXT2 
(SCART) terminal.
No audio output from AUDIO 
OUTPUT terminal.
Troubleshooting Table (continued)
45
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
30
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
YES
The unit does not enter the DTV mode. Or, the DTV menu does 
not appear.
NO
MAIN UNIT:
Check around the pin (1) of  IC1710(FPGA).
Go to "The unit does not enter the DTV mode. Or, the DTV menu 
does not appear."
No video output during DTV reception.
Go to "No video output during DTV reception."
YES
NO
No audio output during DTV reception.
Go to "No audio output during DTV reception."
YES
DTV troubleshooting
NO
Digital UNIT:
Is a voltage supplied from IC4701(3.3V-REG)/IC4704(1.8V-REG)?
D-TUNER UNIT:
Is a voltage of 5V supplied from IC205(SW) and IC206(SW)?
Is a voltage applied to pin(20) (I2CSEL) of P202? 
(High=3.3V)
YES
Do X4001/X4002 oscillate?
Check peripheral circuits of IC4701/IC4704 and pin(7) of IC4701. 
Check peripheral circuits of X4001/X4002.
Check peripheral circuits of IC205/IC206.
NO
YES
NO
Is CLK/DATA signal sent to pins (21) and (22) of P202 and pins (1) 
and (13) of IC204 (COFDM).
YES
Check peripheral circuits of IC202(COFDM)/ IC4001(D-Processor).
NO
YES
NO
YES
Does X202 oscillate?
Check IC202(COFDM)/IC4001(D-Processor).
Check peripheral circuits of X202.
NO
YES
The unit does not enter the DTV mode. Or, the DTV menu does not appear.
Troubleshooting Table (continued)
46
 LC-26GA5E
 LC-32GA5E
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
31
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
NO
YES
Check power supply and pins (9) and (10)of IC2704(SW) and 
audio signal input of pins (4) and (11) of IC2704.
Check Q4601... Q4607 and their peripheral circuits.
NO
Check R272 and R273.
Are scrambled images not displayed?
YES
No video output during DTV reception. Colors of Images are not right. 
NO
DIGITAL UNIT:
Is audio signal fed to pins (5) and (10) of IC4604 (OP-AMP)?
Are video signals (R/G/B,CVBS) send from the 
C4636/C4637/C4638 and emitters of Q4607?
Check power supply and pin (1) of IC2705(SW).
NO
YES
MAIN UNIT:
Is video signal (CVBS) sent from pin (2) of IC2705(SW).
YES
Are video signals (R/G/B,CVBS) fed from pins (179),(180),(181) 
and (184) of IC3002?
YES
NO
MAIN UNIT:
Is audio signal sent to pin (3) and (13) of IC2704 (SW)?
YES
Is audio signal sent from pins (7) and (8) of IC4604(OP-AMP)?
Check R4002(AD2pin) and IC4001(D-Processor).
Check power supply of IC4604(OP-AMP) and its peripheral circuits.
NO
YES
NO
YES
No audio output during DTV reception. Sound is low.
D-TUNER UNIT:
Is data FED[0:7] sent from pins (3),(4),(5),(6),(8),(9),(10) and (11) 
of P202?
DIGITAL UNIT:
Check 5V output of pin (1) of IC4702.
Check 5V of pin (6) of Q4401.
NO
YES
Check R4011(AC8pin),R4013(AC9pin) and IC4001(D-Processor).
DIGITAL UNIT:
Are video signals (R/G/B,CVBS) sent from 
C4639/C4640/C4641/C4625?
34
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
<When EXT1 is used for external input>
No EXT1-Composite output of the external 
input system.
Checklist:
1) Is "INPUT SOURCE" button        on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT1".
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"? ··· Set it to an appropriate level.
3) Check the connection to the external device ··· Connect it correctly as per the operation manual for the device.
No EXT1-RGB output of the external input 
system.
No EXT1-Y/C output of the external input 
system.
NO
Is composite video 
signal sent to pin 
(20) of SCART1 
(J1101)?
Check external 
connection, input 
setting, SCART1 
(J1101) and 
peripheral circuits.
Is RGB signal sent 
to pins (15), (11) 
and (7) of SCART1 
(J1101)?
NO
Check external 
connection, input 
setting, SCART1 
(J1101) and 
peripheral circuits.
Is Y/C signal sent 
to pins (20) and 
(15) of SCART1 
(J1101)?
NO
Check external 
connection, input 
setting, SCART1 
(J1101) and 
peripheral circuits.
YES
YES
YES
NO
Is composite video 
signal (VIN_1) 
sent to input 
terminal pin (6) of 
IC2702 (SW)?
Check 
CONNECTOR 
(SC2702/P1101),
SCART1 (J1101) 
and peripheral 
circuits.
Is RGB signal 
(R1/G1/B1=VIN_6/
5/9) sent to input 
terminal pins 
(187), (175) and 
(182) of IC3002 
(VCT)?
NO
Check 
CONNECTOR 
(SC2702/P1101),
SCART1 (J1101) 
and peripheral 
circuits.
Is Y/C signal 
(VIN1=Y1/C1) sent 
to input terminal 
pins (190) and 
(187) of IC3002 
(VCT)?
NO
Check 
CONNECTOR 
(SC2702/P1101),
SCART1 (J1101) 
and peripheral 
circuits.
YES
NO
Is composite video 
signal
(CVBS1=VIN2)
sent to input 
terminal pin (190) 
of IC3002 (VCT)?
Check IC2702 
(SW) and 
peripheral circuits.
YES
NO
YES
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and (140) - (129) and (128) of IC3002 
(VCTP), and is CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?
Check pins (192), (170) and (133) of BU3.3V 
power line and pins (185), (169) and (142) of 
BU1.8V power line of IC3002 (VCTP), and 
peripheral circuits.
YES
YES
Replace LCD-CONT-UNIT.
YES
NO
NO
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - (24) and (25) of CONNECTOR 
CN1 in LCD-CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
Check CONNECTOR (P2305, CN1) and 
Harness Wire (LV).
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
No picture on the display (3)
 Check HARNESSWIRE (LV).
 Is IC1705 supplying LCD 5V?
   NO
 Check IC1705 and peripheral parts.
   YES
   NO
 Change IC1705.
 Is LCD5V supplied to pins (31) - (28) of 
 CONNECTOR (P2305)?
   YES
Troubleshooting Table (continued)
Page of 17
Display

Sharp LC-32GD8EK (serv.man10) Service Manual ▷ Download

  • DOWNLOAD Sharp LC-32GD8EK (serv.man10) Service Manual ↓ Size: 336.25 KB | Pages: 17 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp LC-32GD8EK (serv.man10) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp LC-32GD8EK (serv.man10) LCD. Information contained in Sharp LC-32GD8EK (serv.man10) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.