Technics SL-P250 - Page 40

CHECK OF PLAY OPERATION AFTER ADJUSTMENT
Checking Skip Search
. Play an ordinary musical program disc.
. Press the skip button to check for norma! skip search
operation (in both the forward and reverse directions).
Checking Manual Search
. Play an ordinary musical program disc.
. Press the manual search button to check for smooth
manual search operations at either fow or high speed
(in both the forward and reverse directions).
¢ Connection of servo gain adjuster
Audio-frequency oscillator
Servo gain adjuster
(SZZP1017F) Oscillator connection
terminals
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Oscilloscope
connection
terminals
~12V. GND +12V
® Chassis @
(Main) (Ground) (Main)
SL-P250 SL-P250
Mi BLOCK DIAGRAM OF SERVO CIRCUIT
OPTICAL PICKUP
Checking Using Defect Disc
1. Play the 0.7mm black dot and the 0.7mm wedge on the
defect test disc (SZZP1054C) and verify that no sound
skip or noise occurs.
. Play the middle tracks of the uneven test disc and verify
that no sound skip or noise occurs.
Conversion connector
(SZZP1032F )
TRAVERSE UNIT
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balance adj.
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SERVO CONTROLLER
VREF
TO D/A CONVERTER /AUDIO CIRCUIT
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