CDP-M7, DHC-MD7 - Sony Audio Service Manual (repair manual). Page 5

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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 and  TIME  button and  §OPEN/CLOSE  button simultaneously to turn on the power.

After turning on the power, press the  

p  button,  TIME  button, and  DISC 1  button simultaneously to perform the Fluorescent indicator tube

check.
The steps of the Fluorescent Indicator Tube check mode will proceed onto the next one by the above multiple pressing.
During the Fluorescent Indicator Tube check mode, press any button or rotate the selector knob to set the key check mode.
To end the mode, press the above three buttons simultaneously.

Key check mode

Press any key or rotate the SELECTOR knob

Multiple pressing

Multiple pressing

Multiple pressing

Multiple pressing

SERVICE BOX (PFJ-1)

POWER SW

JIG
(J-2501-078-A)

CN904
17P

CN902
7P

CN101 7P
SYSTEM CONTROL

FH-E939,838,937
CDP/TC

CORD WITH CONNECTOR 17P
(Provided with PFJ-1)

CORD WITH CONNECTOR 7P
(Provided with unit)

When the three buttons pressed to enter the Fluorescent Indicator Tube all lit mode are released together, the Fluorescent Indicator
Tube all lit mode will remain on. When released separately, the key check mode will be set soon after the Fluorescent Indicator Tube
all lit mode.
In ‘’multiple pressing”, if the three buttons are pressed and released together, the next mode will be set. If not, the key check mode will
be set.

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 “KEY=” number on the Fluorescent indicator tube increases in the + direction and decreases in the
– direction.

Fluorescent Indicator Tube all lit mode

µ

Segment pattern 1 mode

µ

Segment pattern 2 mode

µ

End of test mode

UNIT (CDP-M7)