Test Mode - Sony NW-E3 Service Manual

Setting the Test Mode
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
Note : Push each key for less than 3 seconds.
2. Entering method by shorting the test point.
3 2
IC820
5
Solder brige the test point SL701 (TEST) on the main board and turn on the power.
Releasing the TEST mode
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.
Configuration of Test Mode
The test mode has the configuration given below.
Bx : Stop/play key
(+) : VOLUME + key
(–) : VOLUME – key
LCD
Check
Bx
Ver. /
destination
display
Bx
All display
lit
Bx
All display
off
Bx
SECTION 3

TEST MODE

MAIN BOARD (SIDE A)
Q831
1
(+)
Flash memory
bad block
check
(–)
(–)
Low voltage
check
(–)
Cukoo I/F
(+)
Connection
check
Test mode
(
Short : Test mode
SL701
Open : Normal mode
(TEST)
(+) (+)
Destination
setting
(–) (–)
(+) (+)
High DC
detection
check
(–) (–)
(–)
USB
check
(+)
– 9 –
)
(+)
Contrast
adjustment
Low DC
detection
check
(–)
(+)