NW-MS77DR - Sony Audio Service Manual (repair manual). Page 4

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Procedure 1: In HOLD state, while pushing  Nx  button,

push [RESET] button.

Procedure 2: Insert the memory stick written “testmode.ind” to

NW-MS77DR.

• Preparation “testmode.ind”
Create a random text file in the root directory of Memory Stick
Duo on Windows, file it as the name “testmode” and rename it as
“testmode.ind”.

After starting up test mode, the following contents can be
checked.

•   Nx  button

The KEY test mode is activated. All key inputs are completed,
then  Nx    button is pressed, restart. (Be aware that the
initialization is included on all key input.)

•  [MENU] button

EL1 (blue) lights on/off.

•   >  /  .  

h [GROUP +] / [GROUP -]

EL2 (green) lights on/off.

•   >  button

Charge control port=H (CN504 3, 4, 5 pin), ACCESS LED
lights on.

•   .  button

Charge control port=L (CN504 3, 4, 5 pin), ACCESS LED
lights off.

•  [GROUP +]  button

All LCD lights on.

•  [GROUP -] button

All LCD lights off.

•  [VOL +]  button

BEEP turns on.

•  [VOL -]  button

BEEP turns off.

•  [SOUND]  button

Initialized. (Turns to the factory preset state, time, volume
setting and so on.)
The music data, files and so on in the memory are not changed.