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3. Audio Signal Processing Stage
Audio inputs for DVI and VGA terminal are sent from terminal <PC1 AUDIO> to pins 1 and 30 of IC9501<AUDIO SE-
LECTOR & VOLUME CONTROL>. Audio inputs for BNC terminal are sent from terminal <VIDEO AUDIO> to pins 4
and 27 of IC9501. Audio inputs for RCA terminal are sent from terminal <PC2 AUDIO> to pins 2 and 29 of IC9501. The
input selection is carried out by the IIC bus signal "IICSCL/IICSDA" applied on pins 13 and 14, and selected signals
are output from pins 10 and 21. IC801<CPU> outputs the IIC bus signal from pins 216 and 217, and sends to IC9501.
The input selection, sound volume and sound quality are controlled at IC9501 by the IIC bus signal.
The signals applied on pins 2 and 5 of IC5001<AUDIO OUTPUT> are amplified and output from pins 10 and 7 as the
signal to drive the speakers. The "AUDIO_MUTE" signal is output from pin 50 of IC4802<I/O EXPANDER> and ap-
plied to pin 3 of IC5001 through Q5004. When the level of pin 3 becomes "L", the sound mute is on.
[NO SOUND]
Points of Repair
Check that it does not reproduce the sound with all the input mode.
If no sound with a certain input mode, the problem may be between input terminal and IC9501<AUDIO SELEC-
TOR>.
If no sound with all the input mode, check the below check list.
- Check that the output signal is correct at pins 10 and 21 of IC9501.
- Check that the output signal is correct at pins 2 and 5 of IC5001.
- Check that the mute signal is correct at pin 3 of IC5001. MUTE on: "L"
- Check that the output signal is correct at pins 7 and 10 of IC5001.
Chassis Description & Troubleshooting
Summary of Contents for PLC-XF60
Page 104: ... 104 IC Block Diagrams TC4052BFT Selector IC9005 TB1274AF RGB Matrix IC3101 ...
Page 105: ... 105 IC Block Diagrams TC90A69F PAL Y C Separator IC2101 TE7780 I O Expander IC4801 IC4802 ...
Page 106: ... 106 IC Block Diagrams MAS1390 G Sensor IC5711 NJW1141 Audio Selector Controller IC9501 ...
Page 157: ...MM7 XF6000 157 Mechanical Parts List L15 R G Optical Filter WV Optical Filter WV S05 S05 ...
Page 158: ...MM7 XF6000 158 Mechanical Parts List 1 2 0 5 L03 Integrator In Integrator In ...
Page 160: ...MM7 XF6000 160 Mechanical Parts List L09 Mirror R Mirror R S05 S05 ...
Page 161: ...MM7 XF6000 161 Mechanical Parts List L13 Optical Filter R Optical Filter R ...
Page 162: ...MM7 XF6000 162 Mechanical Parts List 162 Relay lens Out L08 Relay Lens Out ...
Page 165: ...MM7 XF6000 165 Mechanical Parts List ...
Page 166: ... MM7A Oct 2004 BB 400 Printed in Japan SANYO Electric Co Ltd ...
Page 170: ...Diagrams Drawings MM7 XF6000 ...