Hitachi DZ-GX20A Service Manual page 60

Troubleshooting > Trouble Diagnosis
Power does not turn on.
Remove the MAN circuit
board and solder a lead
wire to check points.
Set to service position (A).
No
Are fuses F0501-0504
conducting?
Yes
No
TL0508 (REG ON1):
(*1)
3.2V DC
Yes
*1: When power switch is set to "VIDEO",
"DISC PHOTO" or "CARD PHOTO".
No
TL0509 (C1.2V):
1.2V DC
Yes
No
TL0510 (C1.8V):
1.8V DC
Yes
1
Replace the fuses.
3
No
IC0501-33, 34: 7V DC
Yes
Replace Q0501 or Q0502.
No
IC0502-32, 33: 7V DC
Yes
Replace Q0506 or Q0507.
4 - 35
List of check points
Circuit board
Symptom
(side)
F0501 - 0504 MAN (B)
TL0508 MAN (B)
TL0509 MAN (A)
TL0510 MAN (A)
TL0511 MAN (A)
TL0512 MAN (B)
TL0514 MAN (B)
TL0515 MAN (A)
TL0516 MAN (A)
TL0517 MAN (A)
TL0522 MAN (B)
TL0523 MAN (A)
TL0524 MAN (B)
TL0525 MAN (A)
TL7002 MAN (B)
TL7003 MAN (B)
TL7004 MAN (B)
IC0501-30 MAN (B)
IC0501-31 MAN (B)
IC0501-32 MAN (B)
IC0501-33 MAN (B)
IC0502-26 MAN (B)
IC0502-27 MAN (B)
IC0502-30, 31 MAN (B)
IC0502-32, 33 MAN (B)
Replace IC0501.
Replace IC0502.
Lead wire
Location on
soldered
circuit board
or not
5D Need not
5E Need not
1F Need
1F Need
1E Need
6E Need not
5D Need not
2A Need
1E Need
3E Need
5E Need not
3B Need
4C Need not
1B Need
6D Need not
6D Need not
6D Need not
4E Need not
4E Need not
4E Need not
4E Need not
5E Need not
5E Need not
5E Need not
5E Need not