Keypad Led Not In Operation( Blue ) - Pantech G200 Service Manual

G200 Service Manual
2. Check to see if U107.4 pin Master Clock(13MHz). : CP109
NO Check U107 No. 1.2 pin and then check the PCB pattern, soldering

6.1.3 KEYPAD LED Not in Operation( blue )

1.Check to see if R129. 1 pin is around 2.8V(duty:80%, 256Hz) : CP110
NO Check R129 and Q102 and then replace those
2.Check to see if R123.124.125.126.127.128 is same with battery voltage : CP111
NO Check the PCB pattern between battery and the resistors.
NO Replace the resistors.
3.Check to see if D102.103.104.105.106.107.108.109.110.111.112.113 is well operated by multimeter :
CP112
NO Replace the LEDS.
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PANTECH
CP108
CP109
CP109
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