LG L3200A Service Manual - Page 14
Troubleshooting Guide
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TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) 1 2 CHECK J601 VOLTAGE NO (18V, 12V, 5V)? 3 YES 4 CHECK NO J602 VOLTAGE 5 (24V, 33V) ? YES CHECK 6 X401 NO (14.318MHz) ? YES CHECK 7 J601 NO (SUB POWER) ? YES CHECK KEY CONTROL BOARD Waveforms 1 J601-18V 2 J601-12V CHECK POWER BOARD CHECK POWER BOARD CHECK X401 CHECK MICOM(U402) SUB POWER PORT(R634) 3 J601-5V - 14 -
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- 14 -
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK POWER BOARD
CHECK J601 VOLTAGE
(18V, 12V, 5V)?
NO
NO
NO
NO
CHECK POWER BOARD
CHECK
J602 VOLTAGE
(24V, 33V) ?
CHECK KEY
CONTROL BOARD
YES
YES
YES
YES
CHECK X401
CHECK
X401
(14.318MHz) ?
CHECK MICOM(U402)
SUB POWER PORT(R634)
CHECK
J601
(SUB POWER) ?
1
2
3
4
6
7
5
1
3
Waveforms
J601-18V
J601-12V
J601-5V
2