Read Sharp LC-37GA9EK (serv.man8) Service Manual online
40
LC-26GA5E
LC-32GA5E
LC-32GA9E/LC-32BV9E
LC-37GA9E/LC-37BV9E
Troubleshooting Table (continued)
36
LC-32/37GA9E
LC-32/37BV9E
TROUBLESHOOTING TABLE
(Continued)
NO
NO
NO
YES
YES
Is composite video signal sent to
pin (1) of A/V-IN-TERMINAL
(J1201)?
pin (1) of A/V-IN-TERMINAL
(J1201)?
Check external connection,
input setting, A/V-IN-TERMINAL
(J1201) and peripheral circuits.
input setting, A/V-IN-TERMINAL
(J1201) and peripheral circuits.
YES
Is composite video signal (IN3-
CVBS) sent to input terminal pin
(4) of IC1201 (SW)?
CVBS) sent to input terminal pin
(4) of IC1201 (SW)?
Check A/V-IN-TERMINAL
(J1201) and peripheral circuits.
(J1201) and peripheral circuits.
Is composite video signal
(CVBS=VIN7) sent to input
terminal pin (184) of IC3002
(VCT)?
(CVBS=VIN7) sent to input
terminal pin (184) of IC3002
(VCT)?
Check CONNECTOR
(SC2703/P1102), IC3002 (VCT)
and peripheral circuits.
(SC2703/P1102), IC3002 (VCT)
and peripheral circuits.
NO
NO
YES
YES
Is Y/C signal sent to pins (11)
and (7) of S-TERMINAL
(J1201)?
and (7) of S-TERMINAL
(J1201)?
Check external connection,
input setting, S-TERMINAL
(J1201) and peripheral circuits.
input setting, S-TERMINAL
(J1201) and peripheral circuits.
YES
YES
Is Y3 signal (IN3-Y) sent to input
terminal pin (6) of IC1201 (SW)?
terminal pin (6) of IC1201 (SW)?
Is Y/C signal (VIN7/VIN8) sent to
input terminal pins (184) and
(183) of IC3002 (VCT)?
input terminal pins (184) and
(183) of IC3002 (VCT)?
Check S-TERMINAL (J1201)
and peripheral circuits.
and peripheral circuits.
NO
Check CONNECTOR
(SC2703/P1102), IC3002 (VCT)
and peripheral circuits.
(SC2703/P1102), IC3002 (VCT)
and peripheral circuits.
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)?
CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?
NO
Check pins (192), (170) and
(133) of BU3.3V power line and
pins (185), (169) and (142) of
1.8V power line of IC3002
(VCTP), and peripheral circuits.
(133) of BU3.3V power line and
pins (185), (169) and (142) of
1.8V power line of IC3002
(VCTP), and peripheral circuits.
YES
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)?
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
NO
Check CONNECTOR (P2305,
CN1) and Harness Wire (LV).
CN1) and Harness Wire (LV).
YES
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
NO
Is LCD5V supplied to pins (31)
– (28) of CONNECTOR
(P2305)?
Check Harness Wire (LV).
– (28) of CONNECTOR
(P2305)?
Check Harness Wire (LV).
YES
Replace LCD-CONT-UNIT.
<When EXT3 is used for external input>
No EXT3 output of the external
input system.
input system.
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT3".
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.
1) Is "INPUT SOURCE" button on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT3".
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 EXT3-Y/C output of the
external input system.
external input system.
No picture on the display (5)
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