NW-E8P - Sony Audio Service Manual (repair manual). Page 8

8

To enter the test mode, two methods are available :
1. Entering method with key input.

Turn the HOLD switch to ON. While holding down the Bx key, press the following keys in the following order :
VOLUME + 

t VOLUME – t VOLUME – t VOLUME + t VOLUME – t MEGA BASS t MEGA BASS t DISPLAY

 Push each key for less than 3 seconds.

2. Entering method by shorting the test point.

Solder brige the test point SL701 (TEST) on the main board and turn on the power.

1. When test mode was entered with key input, turn off the power supply.
2. When test mode was entered by shorting the test point, turn off the power supply and open the solder brige of SL701 (TEST) on the main

board.

Test mode
Short : Test mode
Open : Normal mode

(

    )

1

4

LCD

Check

Ver. /

destination

display

All display

lit

(+)

(–)

All display

off

Flash memory

bad block

check

Bx

Bx

(+)

(–)

(+)

(–)

Destination

setting

Contrast

adjustment

(–)

Low voltage

check

(–)

Bx

Bx

(–)

High DC
detection

check

Low DC

detection

check

(+)

Supply 0.9V DC to battery 
terminal and press (–) key.

Supply 1.24V DC to battery 
terminal and 7V DC to USB 
connector and press (+) key.

Supply 1.24V DC to battery 
terminal and 4V DC to USB 
connector and press (+) key.

The test mode has the configuration given below.

Bx

: Play/stop key

(+)

: VOLUME + key

(–)

: VOLUME – key

C

C703

C704

R764

R769

R7

7

R705

R703

R767

R783

R7

7

R7

7

JC722

X701

TP702

TP3 TP701

TP703

(TEST)

IC820

CN701

USB

CONNECTOR

4

4

1

1

1

2

2

3

3

5

5

5

13

(13)

1-681-242-

P701

D781

MAIN BOARD   (SIDE B)