Table of Contents
Advertisement
TROUBLESHOOTING TABLE
LC-26GA5E
LC-32GD9E
LC-32GA5E
LC-37GD9E
<When EXT1 is used for external input>
Troubleshooting Table (continued)
TROUBLESHOOTING TABLE
No EXT1-Composite output of the external
input system.
Checklist:
1) Is "INPUT SOURCE" button
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"? ··· Set it to an appropriate level.
D-TUNER UNIT:
3) Check the connection to the external device ··· Connect it correctly as per the operation manual for the device.
Is data FED[0:7] sent from pins (3),(4),(5),(6),(8),(9),(10) and (11)
of P202?
Is composite video
Check external
signal sent to pin
connection, input
NO
DIGITAL UNIT:
(20) of SCART1
setting, SCART1
Are video signals (R/G/B,CVBS) sent from
(J1101)?
(J1101) and
C4639/C4640/C4641/C4625?
peripheral circuits.
YES
Are video signals (R/G/B,CVBS) send from the
Is composite video
Check
C4636/C4637/C4638 and emitters of Q4607?
signal (VIN_1)
NO
CONNECTOR
sent to input
(SC2702/P1101),
terminal pin (6) of
SCART1 (J1101)
MAIN UNIT:
IC2702 (SW)?
and peripheral
Is video signal (CVBS) sent from pin (2) of IC2705(SW).
circuits.
YES
Are video signals (R/G/B,CVBS) fed from pins (179),(180),(181)
Is composite video
and (184) of IC3002?
Check IC2702
signal
NO
(SW) and
(CVBS1=VIN2)
peripheral circuits.
sent to input
terminal pin (190)
Are scrambled images not displayed?
of IC3002 (VCT)?
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)?
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)?
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
DIGITAL UNIT:
Is audio signal fed to pins (5) and (10) of IC4604 (OP-AMP)?
Is audio signal sent from pins (7) and (8) of IC4604(OP-AMP)?
Check IC1705 and peripheral parts.
MAIN UNIT:
Is audio signal sent to pin (3) and (13) of IC2704 (SW)?
No picture on the display (3)
No EXT1-RGB output of the external input
system.
No video output during DTV reception. Colors of Images are not right.
on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT1".
NO
YES
Is RGB signal sent
to pins (15), (11)
NO
and (7) of SCART1
(J1101)?
YES
YES
NO
Is RGB signal
(R1/G1/B1=VIN_6/
YES
5/9) sent to input
terminal pins
NO
(187), (175) and
(182) of IC3002
YES
(VCT)?
YES
YES
YES
NO
YES
YES
No audio output during DTV reception. Sound is low.
YES
NO
YES
Replace LCD-CONT-UNIT.
NO
YES
NO
YES
(Continued)
No EXT1-Y/C output of the external input
(Continued)
system.
Check R272 and R273.
Check external
Is Y/C signal sent
connection, input
to pins (20) and
NO
setting, SCART1
(15) of SCART1
Check R4011(AC8pin),R4013(AC9pin) and IC4001(D-Processor).
(J1101) and
(J1101)?
peripheral circuits.
Check Q4601... Q4607 and their peripheral circuits.
Check
Is Y/C signal
NO
CONNECTOR
(VIN1=Y1/C1) sent
(SC2702/P1101),
to input terminal
SCART1 (J1101)
pins (190) and
Check power supply and pin (1) of IC2705(SW).
and peripheral
(187) of IC3002
circuits.
(VCT)?
DIGITAL UNIT:
Check 5V output of pin (1) of IC4702.
Check 5V of pin (6) of Q4401.
NO
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.
NO
Check CONNECTOR (P2305, CN1) and
Harness Wire (LV).
NO
Is LCD5V supplied to pins (31) - (28) of
CONNECTOR (P2305)?
Check R4002(AD2pin) and IC4001(D-Processor).
Check power supply of IC4604(OP-AMP) and its peripheral circuits.
YES
Is IC1705 supplying LCD 5V?
Check power supply and pins (9) and (10)of IC2704(SW) and
audio signal input of pins (4) and (11) of IC2704.
Change IC1705.
34
31
46
LC-32/37GD8E/RU
LC-32/37BT8E/RU
Check external
connection, input
NO
setting, SCART1
(J1101) and
peripheral circuits.
YES
Check
NO
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
YES
YES
NO
Check HARNESSWIRE (LV).
NO
Advertisement
Table of Contents
