EN 17
3139 785 31500
5.
Upgrade Software & Repair Chart
NOTE1: To start debugging this section, playback in repeat mode a 1kHz 0dB sine wave from a test CD
NOTE2: All references are to Analog Board unless otherwise specified
Check Test Point
I613 = 11.2V –12V
I624 = 3.3V
I615 = high
Check Test Points on
Analog Board
I603, I604, I605, I609 =
square pulse
Monitor Test Point
F603 = <0.6V (low)
Monitor Test Point
I600 = -5V (high)
Monitor Test Point
I601 = 5V (high)
Monitor Test Point
I618 & I620 = 1KHz
2Vrms Sine Wave
Monitor Test Point
I616 & I617 = 3.3V
Monitor Test Point
F408 = 5V (high)
OK
OK
OK
OK
NOK
NOK
Check Voltage at Connector
1400 (Analog Board)
Pin 1 = 12.00v
Pin 3 = 5.00 v
Pin 5 = 3.30v
Pin 7 = -5.00v
Pin 9 = 32.00v
Pin 11 = -26.00v
OK
NOK
Replace Analog
Board
Replace Digital
Board
Replace Analog
Board
Change Audio
DAC, item 7603
on Analog Board
Change Audio
DAC, item 7603
on Analog Board
Change Digital
Board
Change transistor
item 7602
Change transistor
item 7600
Change PSU
OK
OK
OK
Check cables on connector 1600 and 1400
on analog board for visible disconnections or
loose connections
No visible problems
with connections
Fix the cable connections
Visible problems with
connections
5.3.4 Audio No Sound (Playback)