Troubleshooting charts
- 20 -
HVD1
High Voltage Drive signal is output
to pin 3 of I401.
31.5 / 33.75KHz
12Vp-p
Check 200VB to
PA14M.
To No Power
NO
High Voltage Drive signal is output
to source of Q407.
31.5 / 33.75KHz
200Vp-p
60Hz
20Vp-p
100V
FBT B+ to #12 of PW16P is about
100V 20Vp-p
END
Check emitter
of Q401.
NO
Check Q810.
Check EHT Drive signal to
base of Q808.
31.5 /33.75KHz
12Vp-p
The voltage waveform of Q810's
drain is the following.
650Vp-p
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...
