Troubleshooting Guide - Sanyo VPC-CA6OR Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
PUSH THE POWER
SW FOR A WHILE
HIGH
IC301-51
KEY INPUT
LOW
NO
IC302-7 5.3 V CHECK CP2, IC531,
(BOOST 5.3 V)
YES
LOW
IC301-9, 36, 59
(VDD)
HIGH
LOW
IC301-53
CHECK IC302, RB312
(RESET)
HIGH
LOW
IC301-49
(BAT OFF)
HIGH
NO
IC301-58
OSCILLATION
YES
NO
IC301-55
OSCILLATION
YES
CHECK IC301
NO PICTURE
MAIN CLOCK FOR SYSTEM OPERATION
IC101-W1 (XOUT)
NG
NO OPERATION IF ABSENT
CHECK
CHECK X1102 OSCILLATOR
OSCILLATION
OK
INCORRECT HANDSHAKING
NG
IC301-64, 63
BETWEEN 8-BIT CPU AND ASIC
(ASIC_SO, ASIC_SI)
CHECK EACH INTERFACE
OK
CHECK SOLDERING
OF MEMORY
EACH PIN
CHECK UNIT SW
F5001
CHECK IC302
CHECK RB312
CHECK X3001
CHECK X3002
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-44, 52
KEY INPUT
IC501-18, 29
(P ON, PA ON)
IC511-1 (PA ON3)
SERIAL
COMMUNICATION
CHECK CP1 DMA
BLOCK
– 22 –
NO
CHECK UNIT SW
YES
LOW
CHECK IC101, IC301,
PWA BLOCK
HIGH
NG
CHECK IC301,
CP1 DMA BLOCK
OK