Aiwa XR-EM20 Service Manual page 41

ADJUSTMENT (FRONT/DECK/TUNER/CD) - 2/8
<DECK SECTION>
MAIN PWB PART SIDE
L451
J231
1.TAPE SPEED ADJUSTMENT
Requirements
Measuring equipments : wow-flutter meter (frequency counter )
Test Tape: TTA-100 (3KHz)
Test point: C651(Lch),C652(Rch),GND
Adjustment point : Tape speed adjustment point (motor)
1) Connect Test point to the Wow - flutter meter.
2) Insert the test tape (TTA-100), play back center of the tape
and adjust the motor until it becomes 3,000Hz +3 / -2%.
2.WOW – FLUTTER CHECK
Requirements
Test tape: TTA-100 (3KHz)
Test point: C651(Lch),C652(Rch),GND
1) Connect the Test point to the Wow – flutter meter.
2) Set the indicator to JIS and the mode to W RMS (WTD)
of the Wow - flitter meter.
3) Play back thee center of the test tape (TTA-100) and check
that it is below 0.25%.
C651 C652
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-41-
HEAD
DECK MECHANISM
MOTOR
WOW&FLUTTER METER
Hz %
INPUT
TP
WOW&FLUTTER METER
Hz %
INPUT
TP
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