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TROUBLE SHOOTING TABLE
Circuits to be checked:
» Power circuit.
» Micon circuit.
» Protector circuit
» Peripheral circuit of
Bus Line.
Normal
No
Does 5V appear at pin (33) of IC1000?
No
Check L1002 and
Check IC1000,
the sub power
Q1008, Q1750,
circuit consisting
Q1751 and
IC2700, D2700
IC1002.
and etc.
14-1
(Continued)
A
Check F2700.
Blown out
Replace the Fuse.
Is the Fuse again blown out?
Yes
Check the power circuit
consisting of IC1702, T1700
and sub power circuit
Yes
consisting of IC2700, D2700
and etc.
TROUBLE SHOOTING TABLE
2
E
PROM
(IC1001)
AV-SW
(IC451)
VCD1
(IC2801)
SECAM
(IC2901)
B
PDC
(IC1500)
DCF
(IC5461)
DEM
(IC2300)
PLL1
(TU201)
VCD2
(IC4902)
PIP
(IC4901)
SSP
(IC2302)
Other pattern:
Other I
2
C bus control ic or unit.
(It has SDA and SCL PORT.)
(Continued)
Lights up
turn off
14-2
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