Electrical Adjustments; Tape Speed Adjustment - Sanyo RD 203 Service Manual

ELECTRICAL ADJUSTMENTS
@ Audio Signal Generator
| ® Input Level Control .......0.. 0.2.00 0008- Maximum
Sy eet tapes
@
Audio Signal Generator Output .......
1kHz OdB (1V)
* 3kHz test tape (Example: TEAC MTT- 111) for Tape
| Speed Adjustment NOTE:
* 10kHz test tape (Example: TEAC MTT-114) for Head
Azimuth Adjustment
* Test Tape for DOLBY Level Calibration (Example:
TEAC MTT-150) in Playback Gain Adjustment
The electrical adjustments should be performed in the order as
described below.
TAPE SPEED ADJUSTMENT
Connect the frequency counter to the left or right channel LINE OUT.
HEAD AZIMUTH ADJUSTMENT
Wave Forms: Overlapped
Potentiometer inside Motor
and the VTVM to both channel LINE OUT.
Position of Tape Switch
PLAYBACK GAIN ADJUSTMENT
Connect the VTVM to LINE OUT.
Position of Tape Switch
MTT-150
Normal
(DOLBY Level
Calibration Tape)
RECORDING BIAS ADJUSTMENT
Connect the audio signal generator and the attenuator to the LINE IN, and the VTVM to the LINE OUT.
—
RECORDING GAIN ADJUSTMENT
Connect the audio signal generator and the attenuator to the LINE IN, and the VTVM to the LINE OUT.
Azimuth Adjusting Screw
P101 (Left)
P201 (Right)
Output:
14kHz = 1kHz
Deviation +1dB
P103 (Left)
P203 (Right)
1kHz and 14kHz
at 7.1 mV (—43dB)
1kHz at 178mV
— (—15dB) -
335mvV (—9.5dB)