Sony RDR-VX500 Service Manual page 110

FAST FORWARD
(VCR Section)
DOESN'T OPERATE
LOAD TAPE AND
PRESS F.FWD BUTTON
F.FWD
NO
PRESS FF
INDICATOR IN
KEY IN REMOTE
THE DISPLAY
CONTROL
YES
YES
CHECK TIMER
CHECK CN604
NO
2pin 24V?
CHECK POWER BLOCK
4pin 5V?
5.9pin 3.2V?
YES
NO
CHECK CN604
CHECK IC601
5.9pin 3.2V
YES
NO
IC601 67pin
CHECK CAPSTAN MOTOR
FG pulse
YES
CHECK
MECHANISM
NO
CHANGE IC601, XT601
FWD SEARCH DOESN'T
(VCR Section)
OPERATE
NO
PLAY
SEE
(PLAY DOESN'T OPERATE)
OPERATION
YES
PRESS F.FWD FOR
FORWARD SEARCH
NO
IS CAPSTAN
CHANGE DECK
SPEED CHANGED?
YES
NO
NOISE BAR
(CONTROL PULSE)
LOCKING
IC601-76
YES YES
CHECK CAPSTAN
CHECK IC601
MOTOR
NO
SEARCH
CHANGE IC601
OPERATION
YES
END
NO
ADJUST
A/CE HEAD