Troubleshooting Guide - Sanyo VPC-HD1A Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
PUSH THE POWER
SW FOR A WHILE
IC301-44
YES
(SCAN OUT2)
PULSE INPUT
NO
NO
IC303-7 5.3 V CHECK TCA, IC955,
(BOOST 5.3 V)
YES
LOW
IC301-9, 38, 62
(VDD)
HIGH
LOW
IC301-56
CHECK IC303, RB302
(RESET)
HIGH
LOW
IC301-52
(BAT OFF)
HIGH
NO
IC301-61
OSCILLATION
YES
NO
IC301-58
OSCILLATION
YES
CHECK IC301
NO PICTURE
X1101, IC111-1, MAIN CLOCK FOR SYSTEM OPERATION
NG
IC112-1 NO OPERATION IF ABSENT
CHECK OSCILLATION CHECK X1101 OSCILLATOR, IC111, IC112
OK
INCORRECT HANDSHAKING
NG
IC301-67, 66
BETWEEN 8-BIT CPU AND ASIC
(ASIC_SO, ASIC_SI)
CHECK EACH INTERFACE
OK
CHECK SOLDERING
OF MEMORY
EACH PIN
CHECK S3103
Q9562
CHECK IC303
CHECK RB302
CHECK X3001
CHECK X3002
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-32, 31
(SCAN IN 3, 4)
PULSE INPUT
CL521, CL502, CL503
(P ON, P(A) ON,
P(A) ON2)
SERIAL
COMMUNICATION
CHECK CP1 DMA
BLOCK
– 23 –
NO
CHECK D3115
YES
LOW
CHECK IC301, IC101,
PWA BLOCK
HIGH
NG
CHECK IC301,
CP1 DMA BLOCK
OK