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 built in theing while 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 follow-5. By pressing the PLAY MODE key, tracking servo, sled servo
ing.and CLV-A (servo in PLAY) are turned ON.
HOLD OFF ? ON
6. When 4. an 5. are performed, playing begins. No muting is
Be sure to turn OFF
the HOLD switchON in the service mode.
(If ON, all the LCD7. By pressing the p key, all servos (focus, tracking and sled)
indication and are turned OFF. However, the disc motor revolves for a while
LED are light up)
by inertia.
p (STOP)
All servos are turned OFFY Step 3 (Resetting of service mode)
1. Be sure to disconnect the external power supply and remove
+ (FF)
the solder bridge at the TEST terminals connected before in
The optical pick-up
is moved outwardlysetting.
2. The set thus becomes available for normal operation.
= (FR)
^ (PLAY/PAUSE)
The optical pick-up
Focus is tuned ON to
is moved inwardly
effect draw-in mode� MAIN BOARD � (Side A)
REPEAT/ENTERPLAY MODE
Tracking gain-up modeTracking servo and sled
while pressingservo are turned ON
Descriptions in [ ] indicate major operations in the service
mode. For more information, 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, IC801AP807) (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-
TAP807
ing servo and sled servo are turned OFF, so it can be turned
(TEST)
ON by pressing the PLAY MODE key if required.
3. By pressing the REPEAT/ENTER key, the tracking gain-up
Fig. 2 Location of Test terminal
mode becomes active.
� 10 � |
ACEC
