Aiwa XR-M161HS(S) Service Manual page 26

ELECTRICAL ADJUSTMENT-3/13 (K MODEL)
4. REC. BIAS FREQUENCY ADJUSTMENT
Requirement
• Measuring equipment: frequency counter
Test point : TP9
Adjustment point : L301
1) Connect the TP9 to the frequency counter.
2) Set the recording condition to the main unit.
3) Adjust the L301 until it becomes 85KHz±5KHz.
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FREQUENCY COUNTER
Hz
TP9
GND