DHC-MD7, MDS-M9 - Sony Audio Service Manual (repair manual). Page 4

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This unit is not able to operate on its own because it does not have its own power supply. During servicing, connect to other units.
Power is supplied when the  SYSTEM POWER  button of the amplifier (TA-M7) is turned ON.
If the other units are not available, use a service box (PFJ-1) and jig (J-2501-078-A).
In this case, press the  

p  button,  r REC  button, and  DISPLAY  button simultaneously to turn on the power.

Press the  

p  button,  r REC  button, and  SHUFFLE  button simultaneously to turn on the key/Fluorescent indicator tube/LED check mode.

During the check mode, press any button or rotate the  SELECTOR  knob to proceed onto the next step.

1 LED all-lit mode (displays KEY/FL/LED.)

2 Fluorescent indicator tube all lit mode

3 CHECK 1 lit mode (partially lit)

4 CHECK 2 lit mode (Partially lit)

5 Key check mode (Displays JOG = 0, KEY = 0)

Note 1) When the three buttons pressed to enter the LED all lit mode are released together, the LED all lit mode will remain on. When released

separately, the next Fluorescent indicator tube all lit mode will be set.

Note 2) The LEDs will light up sequentially after the all lit mode each time the buttons are pressed or the  SELECTOR  knob is rotated.
Note 3) In the key check mode, each time the button is pressed, the “KEY =” number on the Fluorescent indicator tube increases. When

the  SELECTOR  knob is rotated, the “JOG =” number on the Fluorescent indicator tube increases in the  

+  direction and decreases

in the  

=  direction.

Note 4) To end the above mode, remove the amplifier AC plug or turn OFF the PFJ-1 POWER switch.

The desired input switching can be performed by the following multiple pressing.

p  button,  r REC  button, and  REPEAT  button : Digital-in
p  button,  r REC  button, and  CONTINUE  button : Analog-in

CN101

SERVICE BOX (PFJ-1)

POWER SW

JIG
(J-2501-078-A)

Unit (MDS-M9)

Connector cable 17P
(Provided with PFJ-1)

Connector cable 7P
(Provided with unit)

CN902
7P

SYSTEM CONTROL

FH-E939, 838, 937
CDP/TC

CN904
17P

N

N

N

N