Trouble Diagnosis Table - Hitachi DZMV238EAU Service Manual

11.3 Trouble diagnosis table

Find the pertinent symptom and note the check points corresponding to the symptom in the order listed.
Refer to the circuit board diagrams and test land (TL) location diagram in the following section for the locations of check points
on circuit boards.
Letters in brackets [ ] in check point columns show the circuit board where the check point is located and the side of the
board.
Symptom
No power
No POWER when use
battery
No sound from
speaker
No audio from audio
output jack
Microphone sound
cannot be recorded
*1 : Solder lead wire, etc. to check point for measurement.
1 - 24
Check
Check point
position
1 F0501
1 F0502
1 F0503
1 F0504
1 TL0501
1 IC1502-6 (*1) [MAN-B]
1 TL0503
1 TL0504
1 TL0505 (*1)
1 TL0508
1 TL0506
1 TL0510 (*1)
1 TL0512
1 F0001
1 TL0004
2 PG6103
(speaker connector)
2 Terminals on speaker
(PG6103-1,2)
2 IC6101-25,56 [AUD-B]
2 PG6104
TL6109
Detail of check
[REF-A] Continuity check
[REF-A]
[REF-A]
[REF-A]
[REF-A] Hi when power
turns on
Approx. 3V DC
(SYS3V)
[REF-A] Approx. 1.6V DC
(CAM1.5V)
[REF-A] Approx. 1.9V DC
(CAM1.8V)
[REF-B] Approx. 3.2V DC
(CAM3V)
[REF-A] Approx. 5.1V DC
(CAM5V)
[REF-A] Approx. 3V DC
(DRV3V)
[REF-B] Approx. 5V DC
(DRV5V)
[REF-A] Approx. 15V DC
[REF-A] Continuity check
[REF-A] Low when attached
battery
[AUD-A] Check connections
Audio signal
Audio signal
[AUD-A] Check connections
[AUD-B] Audio signal
Troubleshooting due to check results
NG: F0501 (fuse) faulty.
Replace F0501.
NG: F0502 (fuse) faulty.
Replace F0502.
NG: F0503 (fuse) faulty.
Replace F0503.
NG: F0504 (fuse) faulty.
Replace F0504.
NG: IC1506 faulty.
Replace MAN circuit board
NG: IC1502 faulty.
Replace MAN circuit board.
NG: IC0501 or its peripheral circuits
faulty.
NG: F0001 (fuse) faulty.
Replace F0001.
NG: Replace JK0001 or DCJ circuit
board.
NG: Connector connections faulty.
OK: Replace L case (speaker).
NG: IC6101 or its peripheral circuits
faulty.
NG: IC6101 or its peripheral circuits
faulty.
OK: Check parts on AVJ circuit board.
NG: Connector connections faulty.
OK: Replace microphone.
NG: Check IC6101 their peripheral
circuits.