Hitachi DVPF2E, Service Manual

Page: 31 / 112

E1-8-10
FLOW CHART NO.10
Drum Servo is not functioning.
FLOW CHART NO.11
Capstan Servo is not functioning.
Is the Capstan Servo functioned normally in REC and PLAYBACK mode?
Is 12.0MHz oscillation inputted
to Pin(38) of IC501?
Is the drum C-FG signal
inputted to Pin(87) of IC501?
Is the drum C-CONT signal
inputted to Pin(76) of IC501?
Refer to "1) If the PLAYBACK
mode is not functioning."
If the PLAYBACK mode
is not functioning. 1)
If the REC mode is
not functioning.
2)
No
No
No
No
No
No
No
No
No
No
No Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Is there 12.0MHz oscillation at Pin(38) of IC501? Check X501 and their periphery.
Replace IC501.
Check the line between Pin(77) of IC501 and
Pin(2) of CL502.
Check the cable connected to CL502.
If it is normal, replace the Capstan Motor Unit.
Replace IC501.
In REC mode
In PLAYBACK mode
Is the drum FG signal inputted to Pin(89) of IC501?
Is the RF-SW signal outputted to Pin(18) of IC501?
Is the D-CONT signal outputted to Pin(77) of IC501?
Is the D-CONT signal outputted
to Pin(77) of IC501?
Replace
IC501. Replace IC501.
Is the D-CONT signal outputted to Pin(2) of CL502?
Replace the Capstan Motor Unit or the Cylinder
Assembly.
Refer to "FLOW CHART NO.9 (RF-SW signal
does not be outputted.)"
Check X501 and its periphery.
Check the line between CL502
and Pin(87) of IC501.
Readjust the height of
AC Head.
Replace AC Head.
Is PLAYBACK-CTL signal outputted
to Pin(97) of IC501?
Replace the Capstan
Motor Unit.