Sony D-EJ855 Service Manual page 4

D-EJ855
SERVICE MODE
In the Service mode, this set can check the following.
1. Service Mode Setting Method
To set the service mode, perform as follows.
1) Make sure that the power is not turned on.
2) Check for the following states:
Open/close detection switch (S804) ...... OFF
Solder bridge at SL806 (OPEN) ............ OPEN
[AVLS]
switch (S802) ........................... NORM
[HOLD]
switch (S801) .......................... OFF
[G PROTECTION]
switch (S803) ....... 1
•
3) Short the solder bridge at the SL807 (TEST) on the MAIN
board (see Fig. 2).
4) Turn the power on.
– MAIN Board (Component Side) –
Fig. 2
4
R812
+
C806
K
R811
C807
C805
C809
A
A
R808
VDR8
C804
D805
R807
SL806
SL807
(OPEN)
(TEST)
2. Operation in Service Mode
When the Service mode is set, the LCD on the remote commander
displays the following.
Remote commander LCD display
Microcomputer
VD101
version display
888
All lit
DDDD
Service mode
3. Operation of Buttons and Knobs in Service Mode
The following operation can be checked by operating the buttons
and knobs on the set and remote commander.
3-1 . Case without Setting a CD
•
/ buttons on the set and
> N .
remote commander
Optical pick-up movement (outward or inward)
Tracking/sled servo off
Note: Do not look directly at the laser beam from the optical pick-up.
Do not move forcibly the optical pick-up exceeding the most-out-
side or most-inside track.
3-2 . Case with Setting a CD
Cheking method:
1) Make sure that the power is not turned on.
2) Leave a solder bridge of the SL807 (TEST) on the MAIN board
shorted.
3) Turn the power on, and then set a CD and play it with the X
button on the remote commander.
Remote Commander LCD display
0000
•
button on the set and remote commander
x
All servos (focus/tracking/sled) off
•
/ buttons on the set and
> N .
remote commander
Optical pick-up movement (outward or inward)
Tracking/sled servo off
•
[PRT/ENT]
button on remote commander
Tracking gain up mode
Remote Commander LCD display
Up0000
(For the rest, turn the power off and then turn it on again)
•
[VOL +] [VOL --]
/ buttons on the set and
knobs on remote commander
2-step volume setting
•
[PLAYMODE]
button on remote commander
CLV speed becomes 1 to 4 times each time the button is pressed
Tracking/sled servo on
BASS12
/ knobs on
> N .
(play mode)
/ knobs on
> N .
[VOL +] [VOL --]
/