SECTION 4
SERVICE MODE (TEST MODE)
Y In this set, there are two test modes; CD-DA 2.Test Mode andVIDEO CD Test Mode
VIDEO CD Test Mode.
SwitchesDescription
p
How to Enter the Test ModeGo to CD-DA Test Mode
(POWER OFF)
1. Disconnect external power (no current is applied to the set).
2. Bridge the SOL701 (TEST) on the MAIN Board with a sol-
gVideo system reset (return to 100% white
der. (IC701 (° (TEST) pin is shorted to the ground)
SELECTscreen)
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)� MAIN Board � (Side A)
5. Before connecting external power in step 3, if p (POWER
TV monitor
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)
Monitor IN
Video OUT
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.J901
Each key Function in Test ModeCN501
1. CD-DA Test Mode
SwitchesDescription
p
Stop processing
(POWER OFF)
Press once: Initialize, Average Correct
Press twice: Auto Focus
^
Press 3 times: Focus Auto Gain
(PLAY/PAUSE)
Press 4 times: Tracking Auto Gain
Press 5 times: All Servo ON, Mute OFF
gRepeat once more the processing currentlyCN701
SELECTselected with ^ (PLAY/PAUSE) key.
+
Move optical pick-up toward outside track
(NEXT)
=
Move optical pick-up toward inside track
SOL701
(PREV)
(TEST)
ö
Turn off the Mute
(RETURN)
Fig. 1 Test terminal location and connecting position
Raise K13* by one step after Focus Auto
+Gain
MENURaise K23** by one step after Tracking
Auto Gain
Lower K13* by one step after Focus Auto
�Gain
MENULower K23** by one step after Tracking
Auto Gain
* Coefficient of Focus Gain
** Coefficient of Tracking Gain
� 7 � |
ACEC
