Troubleshooting Guide - Sanyo VPC-A5 Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
LOW
IC302-7
(UNREG)
HIGH
LOW
IC301-9, 36, 59
(VDD)
HIGH
LOW
CHECK IC302-5,
IC301-53
(RESET)
HIGH
LOW
IC301-49 CHECK IC302-4,
(BAT OFF)
HIGH
NO
IC301
4 MHz OSCILLATION
YES
NO
IC301
32 kHz OSCILLATION
R3008, C3008, C3012
YES
NO
IC301 (SCAN IN)
PULSE INPUT POWER SW S3510
YES
CHECK IC301
CHECK PWA
CHECK IC302-6
RB305
RB305
CHECK X3001
CHECK X3002,
CHECK
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301
(SCAN IN)
PULSE INPUT
YES
IC301-19, 20
(P ON, P(A) ON)
HIGH
IC301-17, 24
YES
SERIAL
COMMUNICATION
OK
CHECK DMA BLOCK
– 20 –
CHECK
NO
SHUTTER SW S5452,
R3004
LOW
CHECK IC301,
PWA BLOCK
NO
CHECK IC301,
DMA BLOCK
NG
CHECK IC301