17
Fig5
6. VIDEO AMP. CIRCUIT
A. VIDEO PRE. AMP.
The video pre-amp IC is U201(LM1269). The input signal is 0.7Vpp, then pre-amp IC U201
amplify the video signal to 3~4Vpp. The U201 is controlled by up via I
2
C bus, Fig5 is the
block diagram.
B. VIDEO AMPLIFIER
The video amplifier is U203(LM2467), it amplify video signal to about 40Vpp. Video
output signal add to cathode by AC coupling, Fig6 is the block diagram.. The DC bias is
controlled by the IC U204(LM2480), Fig7 is the block diagram..
Fig 6 is the block diagram
Содержание AC701
Страница 6: ...6 2 CONTROL AND CONNECT LAYOUT A Main PCB ...
Страница 7: ...7 B VIDEO PCB ...
Страница 11: ...11 Fig2 ...
Страница 15: ...15 Fig3 ...
Страница 16: ...16 Fig4 ...
Страница 18: ...18 Fig6 Fig7 ...
Страница 19: ...19 7 TROUBLESHOOTING A POWER SUPPLY CHECK ...
Страница 20: ...20 B MONITOR CHECK FLOW CHART B 1 No Raster ...
Страница 21: ...21 B 2 No Picture ...
Страница 22: ...22 B 3 No Vertical Deflection rester become a horizontal line ...
Страница 23: ...23 APPENDIX A PARTS LISTS ...
Страница 35: ...35 APPENDIX B P C B ASSEMBLY ...
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Страница 53: ...53 APPENDIX C DISPLAY UNIT ASSEMBLY ...
Страница 54: ...54 ...
Страница 57: ...57 APPENDIX D CRT YOKE ASSEMBLY ...
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