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MULTI-CHANNEL DECODING MODULE - Troubleshooting
To start service test program hold Bass & Treble depressed while switching the mains on Virt. Mode Button pressed? Yes No Check the relevant components of the missing voltage on the monoboard No
MDM TEST
Does the MDM SW-version appear in the screen? Yes
No
Is 6V5 present on pin 6 conn. 1802? Is +12V present on pin 11 conn. 1802? Is -12V present on pin 12 conn. 1802? Yes Replace MDM module
Virt. Mode Button pressed? Yes Connect CD player to Coax 1 Play track 15 of *Audio SignalsTest Disc 1 Yes Can sound be heard on ALL Channels ? Yes No
At this moment the MDM module is set to "Service mode"
Use a CD-player with a coaxial digital out
Replace MDM module
Virt. Mode Button pressed?
SPDIF - Sony Philips Digital Inter Face
Yes Connect CD player to Coax 2 Play track 15 of *Audio SignalsTest Disc 1 Yes Can sound be heard on ALL Channels ? Yes No Replace MDM module
*Audio Signals Test Disc 1 = SBC429 4822 397 30184
Press Virt. Mode Button
Yes Connect CD player to Optical 1 In Play track 15 of *Audio SignalsTest Disc 1 Yes Can sound be heard on ALL Channels ? Yes No Replace MDM module Press Virt. Mode Button
Use a CD-player with an optical digital out
Yes
Yes
Press Virt. Mode Button Yes Connect CD player to Optical 2 In Play track 15 of *Audio SignalsTest Disc 1 Yes Can sound be heard on ALL Channels ? No Replace MDM module
Connect CD player to the Analog CD-input Play track 15 of *Audio SignalsTest Disc 1 Yes Use a CD-player with an optical digital out Can sound be heard on ALL Channels ? Yes Does a valid SPDIF -signal, containing a sine-wave of 1kHz appear on the coax out? Yes No Replace MDM module No Replace MDM module
