FUNAI DRVR-B778S Service Manual page 39

FLOW CHART NO.6
Capstan Motor does not rotate.
Is 5V voltage supplied to Pin(2) of CN502?
Is over approximately 2.6V voltage supplied to
Pin(5) of CN502?
Is 12V voltage supplied to Pin(1,11) of CN502?
Replace the Capstan Motor Unit.
FLOW CHART NO.7
Drum Motor does not rotate.
Is 5V voltage supplied to Pin(2) of CN502?
Is over approximately 2.6V voltage supplied to
Pin(8) of CN502?
Is 12V voltage supplied at Pin(1,11) of CN502?
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(90) of IC501?
Is the RF-SW signal outputted to Pin(18) of IC501?
Is 12V voltage supplied Pin(1,11) of CN 502?
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(90) of IC501?
Replace IC501.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check the P-ON+5V line and service it if defective.
No
Check the line between Pin(5) of CN502 and
Pin(76) of IC501, and service it if defective.
No
Check the AL+12V(2) and AL+16V/+12V line, and
service it if defective.
No
Check the P-ON+5V line and service it if defective.
No Check the line between Pin(8) of CN502 and
Pin(77) of IC501, and service it if defective.
No
Check the AL+12V(2) and AL+16V/+12V line, and
service it if defective.
No
Replace the Capstan Motor Unit or the Cylinder
Assembly.
No
Replace IC501.
No
Check the AL+12V(2) and AL+16V/+12V line, and
service it if defective.
D-FG
5Vp-p
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>.
No
Replace the Capstan Motor Unit or the Cylinder
Assembly.
1-11-15
D-PG
D-FG
2.5Vp-p
E9G01TR