Hitachi DZ-GX5020A K Service Manual page 56

Troubleshooting > Trouble Diagnosis
DISC EJECT button does not operate.
Is recognition sound
No
heard when the DISC
EJECT button is
pressed?
Yes
Does "EJECT"
No
appear on the
LCD monitor?
Yes
Is motor drive sound
No
heard when the DISC
EJECT button is
pressed?
Yes
Replace the lock unit.
PHOTO button (focus lock) does not function.
Does focus lock
No
when PHOTO button
is pressed halfway?
Yes
Remove the MAN circuit
board, and solder a lead
wire to check points
Set to service position (A).
TL7047
Yes
(SHUTTER):
(*1)
0V
No
*1: When PHOTO button is pressed all the way.
PHOTO button faulty:
Replace the rear case.
Set to service position (A).
Replace the MAN
circuit board.
Replace the MAN
circuit board.
Yes
Does autofocus operate?
No
Refer to "Autofocus does
not operate".
Replace the MAN
circuit board.
4 - 28
No
TL7041 (EJECT_SW):
(*1)
0V
Yes
*1: When DISC EJECT button is pressed.
Replace IC4006.
List of check points
Circuit board
Symptom
(side)
TL7041 MAN (B)
Set to service position (A).
Remove the MAN circuit
board, and solder a lead
wire to check points
TL7046
Yes
(FOCUS_LOCK):
(*2)
0V
No
*2: When PHOTO button is pressed halfway.
PHOTO button faulty:
Replace the rear case.
List of check points
Circuit board
Symptom
(side)
TL7046 MAN (A)
TL7047 MAN (A)
Disc Eject button faulty:
Replace the rear case.
Lead wire
Location on
soldered
circuit board
or not
6E Need not
Replace the MAN
circuit board.
Lead wire
Location on
soldered
circuit board
or not
1E Need
1E Need