Sanyo HV-DX4EV Service Manual page 6

TROUBLESHOOTING
C. No broadcasting signal received
No broadcasting signal
received
YES
NO
Is the output at IC501 pin# 61(CLK),
60 (DATA) normal?
YES
NO
Is SIF,Video output at TMI(RF101)
Check TMI (RF101) Block.
pin#16,19 normal?
YES
Is Video Signal input at IC501 NO
pin#50?
YES
Is there Video output at IC501
NO
pin#52?
YES
Check Video Buffer Q670, Q671
Check IC 501.
Check IC301.
Check IC501.
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D. No CASSETTE Loading
Cassette tape isn t inserted.
NO
Is 5V voltage obtained at Loading Check at EVER 14V
parts IC501 pin#2? Check Q850.
YES
NO
Is 14V voltage obtained at
Check D851 and POWER circuit.
Capstan Motor P501 pin#2?
YES
Is 13V voltage obtained at Each Connect Capstan and Loading Motor.
NO
Check connector and Capstan Motor.
parts of Loading Motor?
YES
Replace Loading Motor.
E. AUTO STOP in Playback mode
VCR stops automatically in
playback mode.
NO
Is there REEL Pulse at IC501
Check S501, S502 REEL Sensor.
pin#79, 80?
YES Is D.PG/FG pulse at IC501
pin#90 normal ?
YES
Is C. FG pulse at IC501 pin#87
normal ?
YES
Check and replace IC501.
TROUBLESHOOTING
NO
Check R544,C516 and P501
pin#11.
NO
Check C.FG(R543,C517) and
P501 pin#1.
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