Troubleshooting charts
- 23 -
No Power
Switch relay (Y802) doesn't operate.
NO
F801 short-circuits.
Replace F801.
Bridge rectifier (D805) short-circuits.
(The voltage of between Anode and Cathode to
D805 is 0.6V).
Replace D805.
Both AC lines of power cord don't short-circuit.
Replace the parts caused a short-circuit.
PWR SW of PW15 is High.
Check # 14 of I701.
Q804 doesn't defective.
Replace Q804.
Check Y802 (switch relay).
Check the parts caused a short-circuit to secondary circuits
Replace defective parts with a
new one.
NO
NO
NO
NO
NO
NO
ReplaceY802.
The following waveform is to pin 1 of I803 and I805.
370Vp-p
50~80KHz
Check the primary circuits of SMPS
IC, and replace defective parts with a
new one.
NO
END
Summary of Contents for DSC-34W70N
Page 48: ...10 Circuit Diagram 47 10 1 Power Circuit...
Page 49: ...48 Circuit Diagram 10 2 Main Circuit...
Page 50: ...Circuit Diagram 49 10 3 Audio Circuit...
Page 51: ...Circuit Diagram 50 10 4 3D Comb Filter Circuit...
Page 52: ...Circuit Diagram 51 10 5 Main Video Circuit...
Page 53: ...Circuit Diagram 52 10 6 Sub Video Circuit...
Page 54: ...Circuit Diagram 53 10 7 Scan Rate Converter...
Page 55: ...Circuit Diagram 54 10 8 RGB Processor...
Page 56: ...Circuit Diagram 55 10 9 AV Circuit...
Page 57: ...Circuit Diagram 56 10 10 Union Circuit...
Page 59: ...11 Exploded View 58...
