Sanyo HV-DX4EV, Service Manual

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9
TROUBLESHOOTING
8
TROUBLESHOOTING
No broadcasting signal
received
Is the output at IC501 pin# 61(CLK),
60 (DATA) normal?
Is SIF,Video output at TMI(RF101)
pin#16,19 normal?
Check IC 501.
Check IC301.
Check IC501.
YES
YES
NO
NO
NO
Is Video Signal input at IC501
pin#50?
Is there Video output at IC501
pin#52?
Check TMI (RF101) Block.
NO
Check Video Buffer Q670, Q671
C. No broadcasting signal received
YES
YES
YES
Cassette tape isn t inserted.
Is 5V voltage obtained at Loading
parts IC501 pin#2?
Is 14V voltage obtained at
Capstan Motor P501 pin#2?
Check at EVER 14V
Check Q850.
Connect Capstan and Loading Motor.
Check connector and Capstan Motor.
YES
NO
NO
NO
Is 13V voltage obtained at Each
parts of Loading Motor?
Replace Loading Motor.
Check D851 and POWER circuit.
D. No CASSETTE Loading
YES
YES
E. AUTO STOP in Playback mode
VCR stops automatically in
playback mode.
Check R544,C516 and P501
pin#11.
Check S501, S502 REEL Sensor.
Is D.PG/FG pulse at IC501
pin#90 normal ?
Is C. FG pulse at IC501 pin#87
normal ?
Is there REEL Pulse at IC501
pin#79, 80?
Check and replace IC501.
NO
YES
YES
YES
NO
Check C.FG(R543,C517) and
P501 pin#1.
NO