Aiwa NSX-R10 Service Manual page 36

ELECTRICAL ADJUSTMENT -5/7
<Deck Section>
12.Tape Speed Adjustment (DECK 2)
Requirements
* Measuring instruments: Wow-flutter meter (frequency counter)
Test tape: TTA-100 (3 kHz)
Test point: HP OUT
Adjustment point: DECK MOTOR SFR
(1) Connect the HP OUT terminal of the unit to the wow-flutter meter.
(2) Insert the test tape (TTA-100) to DECK 2. Playback the middle part of the tape in the FWD
direction, and adjust DECK MOTOR SFR so that the level, 3,000 Hz Å} 45 Hz can be obtained.
13. Tape Speed Check (DECK 1)
Requirements: Same as Item 12
(1) Insert the test tape (TTA-100) to DECK 1. Playback the middle part of the tape, and
check that the range within Å} 55 Hz is obtained against the speed of DECK 2.
14.Wow-Flutter Check (DECK 1, DECK 2)
Requirements: Same as Item 12.
(1) Connect the HP OUT terminal of the unit to the wow-flutter meter.
(2) Switch the wow-flutter setting from INDICATOR to JIS, and from a mode to W RMS (WTD).
(3) Playback the middle part of the test tape (TTA-100), and check that the level is 0.25 % or below.
15.Head Azimuth Adjustment (DECK 1, DECK 2)
Requirements
* Measuring instrument: Oscilloscope
Test tape: TTA-300 (10 kHz)
Test point: TP8 (Lch), TP9 (Rch)
Adjustment point: Head azimuth adjustment screw
(1) Connect the CH1 of the oscilloscope probe to TP8 (Lch) and the CH2 to TP9 (Rch).
(2) Set the V mode of the oscilloscope to ADD.
(3) Insert the test tape (TTA-300) to DECK 1. Playback the middle part of the tape in the
FWD direction, and adjust the head azimuth adjustment screw so that the waveform
reaches maximum when 10 kHz is played.
(4) After adjustment, lock the screw by bonding (1600B).
(5) Apply the above steps (3) to (4) to DECK 2.
16.Playback Frequency Check (DECK 1, DECK 2)
Requirements
* Measuring instrument: Millivoltmeter
Test tape: TTA-300 (315 Hz / 10 kHz)
Test point: TP8 (Lch), TP9 (Rch)
(1) Connect the CH1 of millivoltmeter to TP8 (Lch) and the CH2 to TP9 (Rch).
(2) Insert the test tape (TTA-300) to DECK 1, and playback 315 Hz and 10 kHz.
(3) Check that the 10 kHz level is ranged within Å} 3 dB compared to the output reference
level of 315 Hz.
(4) Apply the above steps (2) and (3) to DECK 2.
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