Hitachi DV-PF73U Service Manual page 29

FLOW CHART NO.6
Capstan Motor does not rotate.
Is 5V voltage supplied to Pin(2) of CL502?
Is over approximately 2.6V voltage supplied to
Pin(5) of CL502?
Is 12V voltage supplied to Pins(1,11) of CL502?
Replace the Capstan Motor Unit.
FLOW CHART NO.7
Drum Motor does not rotate.
Is 5V voltage supplied to Pin(2) of CL502?
Is over approximately 2.6V voltage supplied to
Pin(8) of CL502?
Is 12V voltage supplied at Pin(1,11) of CL502?
Replace the Capstan Motor Unit or Cylinder
Assembly.
FLOW CHART NO.8
Drum Motor rotates only for a few seconds.
Is the drum PG/FG signal inputted to Pin(47) of IC501?
Is the RF-SW signal outputted to Pin(18) of IC501?
Is 12V voltage supplied Pin(1,11) of CL502?
Replace the Capstan Motor Unit or the Cylinder
Assembly.
FLOW CHART NO.9
RF-SW signal is not outputted.
Is the Drum Motor rotating?
Is the drum PG/FG signal inputted to Pin(47) of IC501?
Replace IC501.
3-10
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
D-PG
5Vp-p
Yes
Yes
No
Check the P-ON+5V line and service it if detective.
No
Check the line between Pin(5) of CL502 and
Pin(28) of IC501, and service it if detective.
No
Check the AL+12V line and service it if detective.
No
Check the P-ON+5V line and service it if detective.
No Check the line between Pin(8) of CL502 and
Pin(29) of IC501, and service it if detective.
No
Check the AL+12V line and service it if detective.
No
Replace the Capstan Motor Unit or the Cylinder
Assembly.
No
Replace IC501.
No
Check the AL+12V line and service it if detective.
No
Refer to "FLOW CHART NO.7" <Drum Motor does
not rotate> and "FLOW CHART NO.8" <Drum
Motor rotates only for a few seconds>.
D-FG
2.5Vp-p
No
Replace the Capstan Motor Unit or the Cylinder
Assembly.