Μ-Com Part Check-1; Μ-Com Part Check-2 - LG CM2630B Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
2. μ-COM PART CHECK-1
μ-com part check-1
Check
end voltage of IC907
(3.7 VA)
YES
Check
Voltage of IC101 Pin49
(3.7 VA)
YES
OK
3. μ-COM PART CHECK-2
μ-com part check-2
Check
if output of D100, D101 is
3.3 V.
YES
Check if IC101 Pin 9, 36, 59 are 3.3 V
YES
Check the operation.
X100: 12 MHz, X101: 32.768 kHz
YES
OK
NO
Check the periphery of IC907.
Check
NO
Pin1, Pin3 of IC100
(3.7 V)
Replace IC101.
NO
Replace D100, D101.
3-7
NO
NO
YES
Replace IC907.
Replace D102 or IC100.