VC-V50S
VC-V80T
VC-V91T
41
1
2
FLOW CHART NO.16 CAPSTAN SERVO TROUBLESHOOTING
Capstan servo does not function.
Are REC and/or
PB mode
inoperative?
Only PB mode inoperative
YES
YES
Only REC mode inoperative
Check COMPOSIT-
SYNC signal line.
Is the C-SYNC
signal(reference)
at appear pin(78)
of IC801?
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Is there REC CTL
signal output at
pins(20) and (21)
of IC801?
Does the capstan
FG signal appear
at pin(14) of
IC801?
Is there 8.00MHz
oscillation at
pins(62) and (63)
of IC801?
Check peripheral
circuit of X801.
Check between
capstan FG signal
line and AE-MC
harness.
Is there capstan
error signal at
pin(45) of IC801?
Is pin(47) of IC801
in high inpedance?
Check "
1
"
Check "
2
"
Replace IC801.
Check capstan
motor unit and/or
replace.
Is there capstan
error signal at
pin(45) of IC801?
Does PB CTL
signal appear at
pin(80) of IC801?
Replace IC801.
Replace AA-MH
harness.
Replace A/C head.
Is AA-MH harness
good?
Does A/C head
operate normally?
Adjust the height
of the A/C head.
YES
YES
YES
YES
YES
NO
NO
NO
NO