CDP-EX77, CDP-EX770, DHC-EX77MD, DHC-MD77, MHC-EX66 - Sony Audio Service Manual (repair manual). Page 3

– 3 –

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-EX66/EX77) 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 STOP button and  TIME button simultaneously to turn on the power.

FH-E939, 838, 937
CDP/TC

POWER SW

SERVICE BOX (PFJ-1)

JIG
(J-2501-078-A)

CN904
17P

CN902
7P

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

CORD WITH CONNECTOR 7 P
(Provided with unit)

CN101 7P
SYSTEM CONTROL

UNIT (CDP-EX77)

After turning on the power, press the STOP button, TIME button, and DISC 1 button simultaneously to perform the Fluorescent indi-
cator 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.

Note 1) When the three buttons pressed to enter the Fluorescent Indicator Tube all lit mode are released together, the Fluorescent Indica-

tor 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.

Note 2) 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 de-
creases in the – direction.

Fluorescent Indicator Tube all lit mode     

Multiple pressing

Segment pattern 1 mode     

Multiple pressing

Segment pattern 2 mode     

Multiple pressing

End of test mode

Key check mode

Press any key or roted the  SELECTOR  knob

Multiple pressing