
3-37
3-36 3-3
6
4. System Circuit Diagram
8
7
6
3 4
5
5
1
2
9
WAVEFORM
(FROM/T
O A
VCP)
Q501, Q503 are defective.
µ-COM is unstable.
IC505 is defective.
VCR will not operate.
RC501 is defective.
Remote control’s Pulse will not received.
X501 is defective.
CLOCK SETTING will not operate.
X502 is defective.
µ-COM will not operate.
ES501, ES502, LD501 are
defective.
Auto Rew will not working.
RS501,RS502,Q514,
Q515 are defective.
Auto stop occures.
R575, R576, R577,
R578 are defective.
Deck will not operate.
IC504 is defective.
Reset is defective.
Set dead.
* IC501 Waveform Photographs
V.HSW
(IC501 Pin 105)
1V/10mS
REC/PB MODE
DV.SYNC
(IC501 PIN 109)
1V/100uS
QUE/REV MODE
CTL(+)
(IC501 Pin 3)
1V/10mS
CTL(-)
(IC501 Pin4)
1V/10mS
DFG/FG
(IC501 PIN 103,104)
1V/10mS
REC/PB MODE
CFG
(IC501 Pin9)
1V/10mS
V.IN
(IC501 Pin 17)
500mV/20uS
V.OUT
(IC501 Pin 19)
500mV/20uS
EE/PB MODE
C.SYNC
(IC501 Pin 111)
1.0V/100uS
EE/PB MODE
Содержание VHR-H803E
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