44
VC-A582U
VC-A582U(A)
VC-H982U
1
2
FLOW CHART NO.17 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 composite-
Sync signal line.
(C770-1, R770)
Does the V-SYNC
signal appear at
pin (50) of IC701?
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Replace IC701.
Is there REC CTL
signal output at
pins (74) and (75)
of IC701?
Does the capstan
FG signal appear
at pin (67) of
IC701?
Is there oscillated
14.2MHz at
pins (38) and (37)
of IC701?
Check peripheral
circuit of X701.
Check between
capstan FG signal
line and the
AC-MC harness.
Is there capstan
error signal at pin
(34) of IC701?
Does pin (32) of
IC701 operate
normally?
Check "
1
"
Check "
2
"
Replace IC701.
Check capstan
motor unit and/or
replace.
Is there capstan
error signal at pin
(34) of IC701?
Does PB CTL
signal appear at
pin (76) of IC701?
(TP204)
Replace IC701.
Replace AA-MH
harness
Replace A/C head.
Is AA-MH harness
good?
Does A/C head
oprate normally?
Adjust the height
of the A/C head.
YES
YES
YES
YES
NO
NO
NO
NO
Summary of Contents for VC-A582U
Page 50: ...50 VC A582U VC A582U A VC H982U ...