EN 18
3139 785 31500
Upgrade Software & Repair Chart
5.
NOTE1: To start debugging this section, playback a 0dB 1kHz sine wave from a test
disc on the external source which exhibits the problem.
NOTE2: All references are to Analog Board unless otherwise specified
Part 1
Check I316 & I319 = sine wave
&
Check I606 & I607= sine wave
Check Test Point
SYSCLK I608 = square pulse 12.28MHz
F609, F610, F611 = square Pulse
Replace the component in
between these 2 test point (Op
Amp 7300)
Check control line
I612 = 0V (low)
I611 = 1.7 V
I610 = 1.6V
Check supply voltage
I614 = 3.3V
OK
NOK
OK
OK
Replace Digital Board
Change ADC
NOK
NOK
Change ADC
NOK
Replace Analog Board
OK
Check connections on
connector 1600 and 1204
for visible disconnections
or loose connections
No visible problems with
connections
Fix the cable connections
Visible problems with
connections
Go to
Part1
and then
Part2
NOK
5.3.5 Audio No Sound (TV & External Source)