Troubleshooting Guide - Sanyo VPC-Z380E Service Manual

4. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
CLOSED
BARRIER SW
OPEN
NO
IC301-34 (SCAN IN 0)
CHECK POWER SW,
PULSE INPUT
CN303, R3020, D3014
YES
LOW
IC302-7 (UNREG)
CHECK ST1, CA2
HIGH
LOW
IC301-25
(VDD)
HIGH
LOW
IC301-21
CHECK IC302, R3051
(RESET)
HIGH
LOW
IC301-20
(BAT OFF)
HIGH
NO
IC301-23
OSCILLATION R3008, C3003, C3004
YES
NO
IC301-26
OSCILLATION
R3004, C3001, C3002
YES
CHECK IC301
NO PICTURE
CLK (60MHz) MAIN CLOCK FOR SYSTEM OPERATION
YES
NO OPERATION IF ABSENT
INPUT TO
CHECK X1001 OSCILLATOR AND IC111
IC102-18 (CLK IN)
NO
CLK (30 MHz)
NG
BASIC CPU BLOCK
INPUT TO
CHECK ASIC PIN 22
IC101-154 (XTAL 1)
OK
ALWAYS APPEARS WHEN CPU, ETC. IS ACCESSED
NG
IC102-113 (ZAS)
CHECK IF CPU IS READKING PROGRAM, AND
CHECK ADDRESS AND DATA BUS OF IC121
OK
REQUEST FOR USE OF DATA BUS FROM
NG
IC101-68
ASIC TO CPU NO DMA TRANSMISSION IF ABSENT
(ZBREQ)
CHECK IC102-110
OK
RECEIVES ZBREQ SIGNAL AND GIVES PERMISSION
NG
IC102-111
TO ASIC FOR USE OF DATA BUS
(ZBGRNT)
NO DMA TRANSMISSION IF ABSENT / CHECK IC101-70
OK
INCORRECT HANDSHAKING BETWEEN 4-BIT
NG
IC101-141, 142
CPU AND RS-232C
(IRL1, 2)
CHECK EACH INTERFACE
OK
CHECK SOLDERING OF
EACH CPU, ASIC AND
MEMORY PIN
NORMAL
BARRIER SW ON
CHECK IC302
CHECK R3052
CHECK X3001,
CHECK X3002,
TAKING INOPERATIVE
PUSH SUTTER
BUTTON
IC301-36, 37
(SCAN IN 2, 3)
PULSE INPUT
CN305-8, 11
(P ON, P(A) ON)
IC301-6, 7, 8
HIGH
SERIAL
COMMUNICATION
CHECK CA2
FOCUS INOPERATIVE
AFTER LENS ADJ.
THE LENS IS IN
FOCUS
CHECK IC911
CHECK CN903
CHECK LENS
− 19 −
CHECK S3029,
NO
R3022, R3023,
D3015, D3016
YES
LOW
CHECK IC301,
Q3005, Q3006, ST1
HIGH
NO
CHECK
IC301, CA2, ST1
YES
CHECK IC301,
NG
R3015, R3032,
Q3003, CA2
OK
OK
NORMAL
NG
NG
CHECK IC102-107
(PPCS)
OK
NG
CHECK IC908,
Q9072, Q9073
OK