Sharp VC-H961U - Page 43

43
VC-A560U(A)/A560U/A560U(B)
VC-H960U/H960U(B)/H961U
1 2
FLOW CHART NO.16
Capstan servo does not function.
Only PB mode inoperative
YES
Only REC mode inoperative
YES YES NO
YES
NO NO
NO
NO
NO
Check peripheral circuit of pin(41) of IC701, C715, C7716 and R708.
Is there 14.318MHz oscillation at pin (32) and (33) of IC701?
Check peripheral circuit of X701.
YES
YES
YES
Does pin(24) of IC701 operate normally?
Check "1"
Check "2"
Check capstan motor unit and/or replace.
Is there CAP- ERROR at pin(28) of IC701?
Replace IC701.
Replace A/C head.
YES
YES
YES
NO
NO
NO
Is there CAP- ERROR signal at pin (28) of IC701?
NO NO
NO
Replace IC701.
Does PB CTL signal appear at pin (58) of IC701?
Replace IC701.
Is there REC CTL signal output at pin(57) and (56) of IC701?
Does PB CTL signal appear at pin(58) of IC701?
Does A/C head operate normally?
Adjust the height of the A/C head.
Does the capstan FG signal appear at pin (49) of IC- 701?
Check the capstan FG signal line bet- ween pin(1) of P701 and pin(49) of IC701.
Check peripheral circuit of AC connector.
Is the V-SYNC signal(reference) at pin(41) of IC701?
Are REC and/or PB mode inoperative?
YES