Service Note - Sony MDS-M9 Service Manual

Power Supply During Servicing
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.
[Connection Diagram]
SERVICE BOX (PFJ-1)
POWER SW
FH-E939, 838, 937
CDP/TC
KEY/Fluorescent Indicator Tube/LED Check Mode
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.
Input Switching by Multiple Pressing
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
SECTION 1

SERVICE NOTE

JIG
(J-2501-078-A)
CN904
17P
Connector cable 17P
(Provided with PFJ-1)
— 4 —
CN101
CN902
7P
SYSTEM CONTROL
Connector cable 7P
(Provided with unit)
Unit (MDS-M9)