Hitachi DZ-GX20A Service Manual page 56

Troubleshooting > Trouble Diagnosis
Autofocus does not operate.
Yes
Does manual focus
operate?
No
Yes
Does zoom operate?
No
Remove the MAN circuit
board and solder a lead
wire to check points
Set to service position (A).
TL0514
No
(C5V_CAM/LEN5V):
4.8V DC
Yes
No
TL0515 (LEN3V):
3.6V DC
Yes
No
TL0513 (C3V_CAM):
3.2V DC
Yes
Replace IC1301
Replace the MAN
circuit board.
Replace the lens unit.
List of check points
Circuit board
Symptom
(side)
TL0513 MAN (B)
TL0514 MAN (B)
TL0515 MAN (A)
IC0501-30 MAN (B)
IC0502-27 MAN (B)
IC0502-30, 31 MAN (B)
No
IC0501-30: 7V DC
Yes
Replace Q0503.
No
IC0502-27: 7V DC
Yes
Replace Q0510.
No
IC0502-30, 31: 7V DC
Yes
Replace Q0508 or Q0509.
4 - 31
Lead wire
Location on
soldered
circuit board
or not
6C Need not
5D Need not
2A Need
4E Need not
5E Need not
5E Need not
Replace IC0501.
Replace IC0502.
Replace IC0502.