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A
Only PB mode inoperative.
I
Check X8801, C8810
and C8811.
I
Check the capstan FG
signal line between EC
connector and IC8801
(through lC7702).
I
I
Does PB CTL signal
appear at pins (71) and
,
Does CFL amplifier circuit
of IC8801 (pins (73) to
Replace lC8801.
(Does the noise appear
at pin (73) when touch
NO )
Is the harness EF-MH
Replace the harness EF-
normal ?
I
Does the A/C head
N O _
Replace AIC head.
operate normally ?
I
Adjust the height of the
-
-
CAPSTAN SERVO TROUBLESHOOTING
I
Capstan servo does not function.
I
Are REC and /or PB
mode inoperative ?
YES
oscillation at oins (38)
and (39) of I&801:! '
I
Is 2.5V at pin (4) of
MC connector ?
YES
r
NO
Does there appear the
capstan FG signal at
pin (68) of IC8801 ?
YES
Is there capstan
N O ~
control signal at pin
YES
Are pins(S), (6) and
I
YES
Is pin (2) of IC8801
normal ?
I
Check "@I.
I
Check "a..
I
In case of NO GOOD
Replace the capstan
motor.
I
Only REC mode inoperative.
pins (70) and (69) of
up to the 2.5V line.
Is there REC CTL
YES
signal output at pin
Replace IC8801.
Check the composite
Replace IC770 1.
sync. signal line
between pin (25) of
to pin (93) of IC8801.
Replace IC8801.
FLOW CHART NO. 1-12
0
B
I
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