Troubleshooting Guide - Sanyo VPC-CG10BK Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
PUSH THE POWER
SW FOR A WHILE
HIGH
IC301-25
CHECK POWER SW
KEY_POWER INPUT
LOW
LOW
IC301-9, 36, 59
(VDD)
HIGH
LOW
IC301-53
(RESET)
HIGH
LOW
IC301-49
(BAT OFF)
HIGH
NO
IC301-55
OSCILLATION
YES
CHECK IC301
NO PICTURE
MAIN CLOCK FOR SYSTEM OPERATION
IC101-AE12 (XOUT) NG
NO OPERATION IF ABSENT
CHECK
CHECK X1102 OSCILLATOR
OSCILLATION
OK
IC301-63, 64 INCORRECT HANDSHAKING
NG
(ASIC_SDO, BETWEEN 8-BIT CPU AND ASIC
ASIC_SDI) CHECK EACH INTERFACE
OK
CHECK SOLDERING
OF MEMORY
EACH PIN
CHECK IC302
CHECK IC302
CHECK IC302
CHECK X3002
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-24, 51
KEY INPUT
IC501-D6, F6 (PON)
IC504-4(PON2)
Q5004-Gate (PAON1)
IC503-4(PAON2)
SERIAL
COMMUNICATION
CHECK CP1 DMA
BLOCK
- -
23
NO
CHECK UNIT SW
YES
CHECK IC101, IC301,
LOW
PWA BLOCK,
CAA BLOCK
HIGH
NG
CHECK IC301,
CP1 DMA BLOCK
OK