EN 82
7.
LX9000R
Circuit Diagrams and PWB Layouts
Start Service Test Program.
Hold
Open/Close button
depressed while plugging
mains cord in.
Then press
S
twice
and select
MDM TEST
.
PLAY
Button pressed?
Connect CD player to Line 1
Play track 15 of
*Audio SignalsTest Disc 1
Display shows
MDM error?
MDM
TEST
No
No
Display shows SW-version
of DSP 7705.
Replace MDM
module
At this moment the MDM module
is set to "Service mode"
Use a CD-player with
a coaxial digital out
Can sound be heard on ALL
Channels ?
No
Yes
Connect CD player to Dig in
Play track 15 of
*Audio SignalsTest Disc 1
Can sound be heard on ALL
Channels ?
No
Replace MDM
module
Connect CD player to
Optical In
Play track 15 of
*Audio SignalsTest Disc 1
Can sound be heard on ALL
Channels ?
No
Replace MDM
module
Use a CD-player with
an optical digital out
Does a valid
SPDIF -signal,
containing a sine-wave of 1kHz
appear on the Dig out?
No
Replace MDM
module
MDM is working properly
troubleshootMDM2000, 140603
Replace MDM
module
Yes
No
Yes
Yes
Display shows SW-version
of µP 7711.
Press PLAY
Button.
Press PLAY
Button.
Yes
Replace MDM
module
Yes
Yes
Yes
Yes
Yes
No
MULTI-CHANNEL DECODING MODULE - Troubleshooting
Is 5V present on pin 6 conn. 1802?
Is +12V present on pin 11 conn. 1802?
Is -12V present on pin 12 conn. 1802?
Check the relevant
components of the
missing voltage on the
Power supply boards
and ASP board.
Yes
Yes
Display shows
LIN error?
Replace MDM
module
No
Yes
No
*Audio Signals Test Disc 1 = SBC429
4822 397 30184
SPDIF - Sony Philips Digital Inter Face
Press PLAY
Button.
Press PLAY
Button.
Display shows
DIG error?
Replace MDM
module
No
Yes
Display shows
OPT error?
Replace MDM
module
No
Yes
MULTI-CHANNEL DECODING MODULE
MDM 2000 derivation for LX9000R
TABLE OF CONTENT
Trouble shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Assembly drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Partslist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Summary of Contents for LX9000R/22
Page 58: ...Diagnostic Software DVD EN 58 LX9000R 5 ...
Page 108: ...EN 108 7 LX9000R Circuit Diagrams and PWB Layouts DVIO BOARD top view ...
Page 109: ...EN 109 7 LX9000R Circuit Diagrams and PWB Layouts DVIO BOARD top view ...
Page 110: ...EN 110 7 LX9000R Circuit Diagrams and PWB Layouts DVIO BOARD top view ...
Page 111: ...EN 111 7 LX9000R Circuit Diagrams and PWB Layouts TEST POINTS OVERVIEW DVIO BOARD ...
Page 151: ...Circuit IC descriptions and list of abbreviations EN 151 LX9000R 9 Figure 9 11 ...
Page 152: ...Circuit IC descriptions and list of abbreviations EN 152 LX9000R 9 Figure 9 12 ...
Page 156: ...Circuit IC descriptions and list of abbreviations EN 156 LX9000R 9 IC7411 ...
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