Troubleshooting Guide - Sanyo VPC-E6 Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
SET THE MAIN
SWITCH ON
IC301-51
YES
(SCAN IN4)
PULSE INPUT
NO
NO
IC302-7 4.7 V
CHECK IC531, Q5301
(BOOST 4.7 V)
YES
LOW
IC301-59
(VDD)
HIGH
LOW
IC301-53
CHECK IC302, RB305
(RESET)
HIGH
LOW
IC301-49
CHECK IC302, RB305
(BAT OFF)
HIGH
NO
IC301-58
OSCILLATION
YES
NO
IC301-55
OSCILLATION
YES
CHECK IC301
NO PICTURE
NG
CLK (48 MHz)
OSCILLATION
OK
INCORRECT HANDSHAKING
NG
IC301-63, 64
BETWEEN 8-BIT CPU AND ASIC
(ASIC_SO, ASIC_SI)
CHECK EACH INTERFACE
OK
CHECK CP1
CHECK S3302
CHECK IC302
CHECK X3001
CHECK X3002
CHECK X1102
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-17, 20
(SCAN IN 0, 1)
PULSE INPUT
IC301-40
(P ON)
SERIAL
COMMUNICATION
CHECK CP1 DMA
BLOCK
– 20 –
NO
CHECK S3301
YES
LOW
CHECK IC301
HIGH
NG
CHECK IC301,
CP1 DMA BLOCK
OK