LG 55SL8500-ZA (CHASSIS:LD91K) Service Manual ▷ View online
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4. Analog TV Video Problem
Check RF Cable
MAIN B’D L821 = 5V ?
YES
MAIN B’D C894 = 3.3V ?
NO
Replace MAIN B’D IC809
YES
NO
Replace MAIN B’D IC808
MAIN B’D C870= 1.8V ?
Replace MAIN B’D IC811
YES
NO
MAIN B’ D X1202 Clock
31.875MHz ?
Replace MAIN B’D IC1200
YES
NO
MAIN B’ D X1201 Clock
20.25MHz ?
Replace MAIN B’D IC1203
YES
NO
Replace Main board IC100
YES
3. Digital TV Video Problem
Check RF Cable
MAIN B’D L821 = 5V ?
YES
MAIN B’D C894 = 3.3V ?
NO
Replace MAIN B’D IC809
YES
NO
Replace MAIN B’D IC808
MAIN B’D C870= 1.8V ?
Replace MAIN B’D IC811
YES
NO
MAIN B’D L1211 = 1.2V ?
Replace MAIN B’D IC1202
YES
NO
MAIN B’D X1202 Clock
31.875MHz ?
Replace MAIN B’D IC1200
YES
NO
MAIN B’D X1201 Clock
20.25MHz ?
Replace MAIN B’D IC1203
YES
NO
Replace Main board IC100
YES
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5. AV1(SCART CVBS) No Video Problem
Check Signal format
Is it supported?
Check the SCART Cable
YES
MAIN B’D JK1100 Check
Replace MAIN B’ D JK1100
YES
NO
Check MAIN B’D R1117
Video Signal ?
NO
YES
Check MAIN B’D C210
Video Signal ?
Replace
MAIN B’D C210
NO
Replace MAIN B’D IC 100
YES
6. AV1(SCART RGB) No Video Problem
Check Signal format
Is it supported?
Check the SCART Cable
YES
Check MAIN B’D JK1101
Replace MAIN B’D JK1101
YES
NO
YES
Check MAIN B’D C200 (RED)
C201 (GREEN)
C202 (BLUE)
Video Signal ?
Replace
MAIN B’ D C200, C201, C202
NO
YES
Check MAIN B’ D R211 (RED)
R212 (GREEN)
R213 (BLUE)
Video Signal ?
Replace
MAIN B’D R211, R212, R213
YES
Replace MAIN B’D IC 100
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7. AV2 No Video Problem
Check Signal format
Is it supported?
Check the SCART Cable
YES
MAIN B’D JK1101 Check
YES
NO
Check MAIN B’D R1133
Video Signal ?
NO
YES
Check MAIN B’ D C211
Video Signal ?
Replace
MAIN B’D C211
NO
Replace MAIN B’D IC 100
YES
Replace JACK B’D JK1101
8. AV3(CVBS) No Video Problem
Check Signal format
Is it supported?
Check the CVBS Cable
YES
MAIN B’ D P402 Check
Replace MAIN B’D P402
YES
NO
Check MAIN B’D R400
Video Signal ?
NO
YES
Check MAIN B’D C217
Video Signal ?
Replace MAIN B’D C217
NO
Replace MAIN B’D IC 100
YES
9. AV1 No Video Out Problem
Check Spec (Refer to User Manual)
Is it supported?
Check the SCART Cable
YES
Check the Trouble Shooting Guide
Analog TV No video
YES
Check MAIN B’D R1182
Video Signal ?
NO
Check MAIN B’D C1107
Video Signal ?
NO
MAIN B’D JK1100 Check
YES
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10. AV2 No Video Out Problem
Check Spec (Refer to User Manual)
Is it supported?
Check the SCART Cable
YES
YES
Check MAIN B’D C1122
Video Signal ?
NO
MAIN B’D JK1101 Check
YES
MAIN B’D C1109
Video signal ?
NO
Replace MAIN B’D IC 100
11. Component No Video / No Color Problem
Check Signal format
Is it supported?
Check the Component Cable
YES
MAIN B’D JK400 Check
Replace MAIN B’D JK400
YES
NO
Check MAIN B’ D R419
Video Signal ?
YES
NO
Check MAIN B’D C215, C209 (Y)
C214 (RED)
C216 (BLUE)
Video Signal ?
Replace
MAIN B’D C215 or C209 or C214 or C216
NO
Replace MAIN B’D IC 100
YES
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