Automatic Adjustment - Technics SL-1200MK7PP Service Manual

7.3.

Automatic Adjustment

This adjustment is automatically performed based on the learning function of the microcomputer.
The following items of measurement/adjustment are automatically performed.
• Rotation accuracy (The reference voltage value)
• Start-up time
• FG Wow and flutter
• Stop angle
• Save adjustment data
<Status Check before Adjustment>
• Check if the unit is in the following conditions.
Turntable Unit
Slip Mat Ass'y
Record
Tone Arm
 Note for adjustment
• Place the unit on a flat vibration-free table, etc. for adjustment.
<Automatic Adjustment Procedure>
1. Start up the Service Mode. (See "7.1. Service Mode Startup Procedure".)
• At startup of the Service Mode, check the following conditions.
LED of Speed select button [45]
1. Press and hold the [START/STOP] button for 3 seconds or more.
• Confirm that the turntable rotates, pauses once, and rotates again.
(The adjustment is automatically performed. The LED of the [33] button flashes during adjustment.)
• The turntable automatically stops when the data is acquired.
(When the LED of the [33] button illuminate, the adjustment is complete. [Adjustment time: approx. 1 minute])
Notes:
• If the LED of the [33] button turns off or flashes, or rotates backward (anticlockwise) even if 2 minutes has elapsed after adjust-
ment, the adjustment is not complete normally. Perform readjustment.
(For readjustment, press and hold the [START/STOP] button again for 3 seconds or more.)
• Do not touch the main unit while rotating.
• Do not press and hold the [45] button for 3 seconds or more in the Service Mode.
(Doing so will erase the result.)
Item
Attached to the main unit
Attached to the main unit
Not present
Fixed to the arm rest
Item
Flashing
Condition
Condition
29
Remarks
Remarks