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Go back to the signal processing 
block.

Check IC801 and its peripheral 
circuits.

Check IC811 and its peripheral 
circuits as well as IC805 (AGC).

Check IC803 and its peripheral 
circuits.

Is there Y signal output at pin (17) of 
IC811?

Is there Y signal output at pin (40) of 
IC801?

Is there Y signal input at pin (21) of 
IC801?

Check IC801 and its peripheral 
circuits.

Is there horizontal sync pulse output 
at pin (9) of IC603?

Check the pulse shaping circuit of 
IC602 and IC603.

Check IC604 and its peripheral 
circuits, and go to "Trouble shooting 
table for PC I/F unit".

Is there horizontal sync pulse output 
at pin (56) of IC801?

Check IC801 and its peripheral 
circuits.

Check IC604 and its peripheral 
circuits, and go to "Trouble shooting 
table for PC I/F unit".

Is there vertical sync pulse output at 
pin (4) of IC801?

Are there signal inputs at 
SC1404, SC1405, SC1501 and 
SC1502? 
Are voltages applied to EA 
connectors and SC5502?

Check IC1401  and their 
peripheral circuits.

Are there signal outputs at
 pins (14) ,(16) and (18) of  
IC1401 ?

Are there signal inputs at pin 
(47) of IC1101, IC1201 and 
IC1301?

Check IC1101, IC1201, IC1301   
and their peripheral circuits.

Are there signal outputs at pins 
(17), (19), (21), (27), (29) and 
(31) of IC1101, IC1201 and 
IC1301?

If there is no signal at EA 
connector or SC5502, go to 
Checking the power unitblock.

If there is no signal at SC1404 
and SC1405, go to "Trouble 
shooting table for PC I/F unit".

If there is no signal at SC1501 
and SC1502, go to the video 
system block. 

Check IC1401  and their 
peripheral circuits.

Check IC1102, IC1202, IC1302   
and their peripheral circuits.

Are there signal outputs at pins 
(17), (19), (21), (27), (29) and 
(31) of IC1102,  IC1202, and 
IC1302?

If there is no signal input at 
pins (15) and (30) of  
SC1101, SC1102 and 
SC1103, check  IC1409 
and their peripheral 
circuits.

If there is no signal input at 
pins (1) and (31) of  SC1101, 
SC1102 and SC1103, check 
the switching circuit and 
amplifier circuit of IC1101, 
IC1201, IC1301, IC1102, 
IC1202, IC1302 and their 
peripheral circuits.

Are there signal inputs at 
SC1101, SC1201 and 
SC1301?

Check IC1406, IC1407, 
IC1408 and their 
peripheral circuits.

Check the R, G and B panels.

Check the input, the switching circuit 
of IC3303 and IC3304, and their 
peripheral circuit, SC3001, SC1502 
and etc.

Are there audio signal inputs at pin 
(2)  of IC1411?

Check the IC1411 control voltage, 
and its peripheral circuits.

Are there audio signal outputs at pin 
(2)  of P5508?

Check IC7301 and its peripheral 
circuits.

Are there audio signal outputs at pin  
(6) of IC7301?

Check IC7301 and its peripheral 
circuits, SP connectors and 
speakers.

If the voltage at pin (2) of IC7301 is 
not as specified, check Q5501, 
Q5502 and their peripheral circuits.

There is no voltage output at 
EA connector.

Is there any other output 
voltage failure?

Is EA connector disconnected 
or loose?

Is AC voltage (85-264V) 
applied across the PA 
connector?

Is Q704 open?

Is there short-circuit between 
collector and emitter of Q752?

Reconnect the EA connector.

Replace F701.

Which output voltage line fails?

Replace ICP751.

Replace R752.

Replace Q752.

Replace PC702.

Replace IC702, T701 or Q704.

P-FAN Vcc

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