SECTION 4
SERVICE MODE
Service Mode (Service program)4. By pressing the ^ key, focus is turned ON from focus search-
The equipment is provided with a service program bing wuilt in thehile entering CLV-S (draw-in mode).
microcomputer, like conventional models.Without disc, focus searching is repeated continuously.
Service program operation methods are described in the follo5. By pressing the PLAw-Y MODE key, tracking servo, sled servo
ing.and CLV-A (servo in PLAY) are turned ON.
6. When 4. an 5. are performed, playing begins. No muting is
PLAY MODE
Tracking servo and sled ON in the service mode.
HOLD OFF n ON servo are turned ON7. By pressing the p key, all servos (focus, tracking and sled)
Be sure to turn OFF
are turned OFF. However, the disc motor revolves for a while
the HOLD switch
by inertia.
(If ON, all the LCD REPEAT/ENTER
indication and Tracking gain-up mode
LED are light up)while pressingY Step 3 (Resetting of service mode)
1. Be sure to disconnect the external power supply and remove
the solder bridge at the TEST terminals connected before in
setting.
2. The set thus becomes available for normal operation.
� MAIN BOARD� (Side A)
=(FR)
The optical pick-up
^ (PLAY/PAUSE)
is moved inwardly
Focus is tuned ON to
+ (FF)effect draw-in mode
The optical pick-up
is moved outwardly
p (STOP)
[All servos are turned OFF]
Descriptions in [ ] indicate major operations in the service
mode. For more informatrion, see Step 2.
Fig. 1 Layout of each key
Y Step 1 (Service mode setting methods)
1. Turn OFF the HOLD switch with external power supply dis-
connected (power is not applied to the set).
2. Solder across the TEST terminals (T%c, IC801AP802) (pin
(TEST) is grounded).
3. Connect an external power supply.
Thus, the set is switched to the service mode.
Y Step 2 (Operation in the service mode)
1. Once the service mode is effected, the LCD displays 5 indica-
tions each of which is repeatedly displayed.
However, the following operations can be activated even if LCD
indication is effected.
2. By pressing the + or = key, the optical pick-up is mov-
able inwardly or outwardly. However, if this is activated, track-
ing servo and sled servo are turned OFF, so it can be turned
ON by pressing the PLAY MODE key if required.
3. By pressing the REPEAT/ENTER key, the tracking gain-up
mode becomes active.
Fig. 2 Location of Test terminal
� 8 � |
ACEC
