Sony D-V8000, Service Manual

Page: 20 / 78

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SECTION 4
SERVICE MODE (TEST MODE)
• In this set, there are two test modes; CD-DA Test Mode and
VIDEO CD Test Mode.
4-1. How to Enter the Test Mode
1. Disconnect external power (no current is applied to the set).
2. Bridge the SOL701 (TEST) on the MAIN Board with a sol-
der. (IC701
(∞
(TEST) pin is shorted to the ground.)
3. Connect the external power.
4. The CD-DA Test Mode is activated. (LCD display varies in 5-
ways, and its 5-way display is repeated.)
5. Before connecting external power in step 3, if
π
(POWER
OFF) key was pressed, the mode is switched to VIDEO CD
Test Mode.
(On the LCD, all segments are displayed, and the TV monitor
becomes 100% white.)
4-2. How to Release the Test Mode
1. Always disconnect external power, and break the solder bridge
of SOL701 (TEST) on the MAIN Board.
2. Thus, the set become ready for normal operation.
4-3. Each key Function in Test Mode
1. CD-DA Test Mode
2. VIDEO CD Test Mode
– MAIN Board – (Side A)
Fig. 1 Test terminal location and connecting position
Switches Description
π
Stop processing
(POWER OFF)
Press once: Initialize, Average Correct
fl
Press twice: Auto Focus
(PLAY/PAUSE)
Press 3 times: Focus Auto Gain
Press 4 times: Tracking Auto Gain
Press 5 times: All Servo ON, Mute OFF
g
Repeat once more the processing currently
SELECT selected with
fl
(PLAY/PAUSE) key.
±
Move optical pick-up toward outside track
(NEXT)
≠
Move optical pick-up toward inside track
(PREV)
ˆ
Turn off the Mute
(RETURN)
ESP
Turn on/off the ESP (fast speed play, when
ON)
REPEAT/
Tracking Gain up/normal switching
ENTER
+
Raise K13* by one step after Focus Auto
Gain
MENU Raise K23** by one step after Tracking
Auto Gain
–
Lower K13* by one step after Focus Auto
Gain
MENU Lower K23** by one step after Tracking
Auto Gain
Switches Description
π
Go to CD-DA Test Mode
(POWER OFF)
g
Video system reset (return to 100% white
screen)
SELECT
CN701
CN501
J901
Monitor IN
TV monitor
Video OUT
SOL701
(TEST)
* Coefficient of Focus Gain
** Coefficient of Tracking Gain