Advertisement
Mi TROUBLE SHOOTING (CD)
* Refer to Schematic Diagram & Waveform Diagram.
1. POWER NOT SENSIBLE
Check CD
power supply
Check RF 2229
(fusible resistor)
Check output
at pin3 of IC7805
(6V)
2. LEAD-IN NOT WORKING
x
Connect AC cord
~|
Check CD
Power source
(main PCB)
Check IC 7777, 7778
GND short
x
Check 5V pattern
and GND short
Check waveform of }—-——————>
Check DSP soldering
DSP pin 23, 24, 25
Check SSP soldering
Check soldering of
RF AMP
Check CLV adjustment
Check F. Bias (VR 1703)
adjustment
|
Check E.F Balance
adjustment (VR 1701)
=50—
Replace IC 7805
Advertisement
