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– 3 –
BP1
BP2
MDX-65
Master unit
(CDX-C880,
C880R, etc.)
BUS CONTROL INBUS CONTROL OUT
SECTION 1
SERVICE NOTE
1-1. TO PLACE THE SET INTO PLAYBACK MODE
The this set has no key control function and cannot be placed into
the Playback mode alone.
For key control, the this set is controlled through serial
communication with a master unit (car audio player, TV tuner or
source selector compatible with the Sony BUS system.)
To service the this set, the set should be connected as given below:
1-2. HOW TO CHECK THE SERVO BOARD
WAVEFORMS
1. Remove the panel (rear) assy, case (upper) and panel (front) assy.
Then, remove the main board from the mechanism deck. (See
page 8 of “SECTION 3. DISASSEMBLY”.)
2. Remove the chassis (OP) block from the mechanism deck. (See
page 10 of “SECTION 3. DISASSEMBLY”.)
3. Short each bridge points BP1 and BP2 on the main board by
solder bridge.
– main board (conductor side) –
4. Connect the power board with the main board by the main
flexible board. Connect the main board with the servo board by
the servo flexible board.
5. Connect to a master unit. With the master unit OFF, press the
preset buttons 4 n 5 n 1 (2 seconds or more each) in this
turn to enter the TEST mode.
6. Open the doors and insert a disc in the chassis (OP) assy. Use
the SOURCE button on the master unit to select to MD to
playback.
7. Check the waveforms at each point on the servo board.
Note: After this check is completed, remove solder between
shorted bridge points BP1 and BP2 and open these points.