Troubleshooting Guide - LG M4200N Service Manual

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NO POWER
(POWER INDICATOR OFF)
CHECK J601 VOLTAGE
(18V, 12V, 5V)?
YES
CHECK
J603 VOLTAGE
(12V, 24V) ?
YES
CHECK
X401
(14.318MHz) ?
YES
CHECK J601
10PIN
(SUB POWER) ?
YES
1. KEY PART IC CHECK
(U401, U402,U403)
2. CHECK KEY CONTROL
BOARD

TROUBLESHOOTING GUIDE

1. NO POWER
NO
NO
NO
NO
- 16 -
CHECK POWER BOARD
CHECK POWER BOARD
CHECK X401
CHECK MICOM(U402)
SUB POWER PORT

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M4200n-b10c.ah**lf)M4200n-b10c.ah**xf

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