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.
2. Operation in Service Mode
When the Service mode is set, the LCD on the remote commander
displays the following.
Remote commander LCD display
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
•
>
N
/
.
buttons on the set and
>
N
/
.
knobs on
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.
•
x
button on the set and remote commander
All servos (focus/tracking/sled) off
•
>
N
/
.
buttons on the set and
>
N
/
.
knobs on
remote commander
Optical pick-up movement (outward or inward)
Tracking/sled servo off
•
[PRT/ENT]
button on remote commander
Tracking gain up mode
•
[VOL +]
/
[VOL --]
buttons on the set and
[VOL +]
/
[VOL --]
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
– MAIN Board (Component Side) –
Service mode
All lit
888
Microcomputer
version display
VD101
DDDD
BASS12
Fig. 2
R813
R808
C811
C810
C804
C807
C805
C809
R812
R811
R807
VDR8
FB803
D803
K
A
A
C440
+
C464
C806
+
D805
SL806
(OPEN)
SL807
(TEST)
•
0000
Remote Commander LCD display
(play mode)
Remote Commander LCD display
(For the rest, turn the power off and then turn it on again)
Up0000
