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ELECTRICAL ADJUSTMENT -4/5
DECK ADJUSTMENT
Equipment and tools required Measuring equipment � Wow-flutter meter � Oscillosope � Tset tape:TTA-100/TTA-300(or TTA-310,320) 1. Tape Speed Adjustment Requirements Measuring equipments : wow-flutter meter (frequency counter ) Test Tape: TTA-100 (3KHz) Test point: HP OUT Adjustment point : MOTOR SFR 1) Connect HP OUT to the Wow - flutter meter. 2) Insert the test tape (TTA-100) to Deck2, FWD play back center of the tape and adjust the MOTOR SFR until it becomes 3,000Hz ± 20Hz. 2. Wow � flutter Check Requirements Test tape: TTA-100 (3KHz) Test point: HP OUT Adjustment point : MOTOR SFR 1) Connect the HP OUT to the Wow � flutter meter. 2) Set the indicator to JIS and the mode to W&F(or RMS,UN WTD) of the Wow - flitter meter. 3) Play back thee center of the test tape (TTA-100) and check that it is below 0.35%.
HP OUT
WOW & FLUTTER METER
MOTOR
Hz IN PUT
%
SFR
3. Head Azimuth Adjustment Requirements Measuring equipment: Oscilloscope Test Tape: TTA-300 (10KHz) Test point: HP OUT/SP OUT Adjustment point: Head azimuth screw 1) Connect the Test point to the oscilloscope of CH1(Lch) and CH2 (Rch). 2) Set the V mode of the oscilloscope to ADD. 3) Insert the test tape (TTA-330) to Deck1 ,FWD play back the center of the tape and adjustment the head azimuth screw until the waveform of the oscilloscope has reached the maximum when playing back at 10KHz. 4) After the adjustment, bond lock (1600B) the screw.
CH1 TP8 TP9
OSCILLOSCOPE
OUTPUT
CH2
RPH
Head azimuth screw
-38-
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