32
TROUBLE SHOOTING
High voltage drive
Check F401 #10 (HVG B+135V)
If resistance between Q430 collector and
base is near, horizontal output TR has
been destroyed.Replace the TR.
Check R445
Check F401 (High
Voltage Generator)
font
Check F401 #7 (OVP) high voltage
control oscillating waveform
Check R447
Replace I421
No
No
Yes
Q891 Base 0V
Horizontal
Deflection
Check F401 #8 (HVG B+135V)
Voltage waveform of Q430 collector is
shown below.
When power isn’t supplied
END
1000 50Vp-p
NO
NO
END
NO
45VP-p
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Summary of Contents for DSJ-4710CRU
Page 14: ...13 IC Description All manuals and user guides at all guides com...
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Page 22: ...21 IC Description All manuals and user guides at all guides com...
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Page 25: ...24 IC Description All manuals and user guides at all guides com...
Page 26: ...25 IC Description All manuals and user guides at all guides com a l l g u i d e s c o m...
Page 27: ...26 IC Description All manuals and user guides at all guides com...
Page 28: ...27 IC Description All manuals and user guides at all guides com...
Page 29: ...28 IC Description All manuals and user guides at all guides com...
Page 30: ...29 IC Description All manuals and user guides at all guides com...
Page 52: ...51 8 Schematic Diagram 1 Block Diagram All manuals and user guides at all guides com...
Page 53: ...52 Schematic Diagram 2 Power All manuals and user guides at all guides com...
Page 54: ...53 Schematic Diagram 3 Convergence AMP All manuals and user guides at all guides com...
Page 55: ...54 Schematic Diagram 4 Convergence Module All manuals and user guides at all guides com...
Page 57: ...56 6 IF Module Schematic Diagram All manuals and user guides at all guides com...
Page 58: ...57 7 AV Main Schematic Diagram All manuals and user guides at all guides com...
Page 59: ...58 8 Micom Module Schematic Diagram All manuals and user guides at all guides com...
Page 60: ...59 9 Control Union Schematic Diagram All manuals and user guides at all guides com...
Page 62: ...61 2 Power PCB PRINTED CIRCUIT BOARD All manuals and user guides at all guides com...
Page 64: ...63 4 IF Module PCB PRINTED CIRCUIT BOARD All manuals and user guides at all guides com...
Page 65: ...64 5 CRT PCB PRINTED CIRCUIT BOARD All manuals and user guides at all guides com...
Page 67: ...66 1 DSJ 4710CRU 10 EXPLODED VIEW All manuals and user guides at all guides com...
Page 68: ...67 2 DSJ 4720CRU EXPLODED VIEW All manuals and user guides at all guides com...
Page 69: ...All manuals and user guides at all guides com...
