Cassette Deck; Recording Bias Adjustment; Tape Azimuth Adjustment; Tape Speed Adjustment - Samsung RCD-M70 Service Manual

1-2 Cassette Deck

1-2-1. Recording BIAS adjustment

1) Connect frequency counter to KC433 (See Fig.1-6)and press the Record button.
2) Adjust KT431 (BIAS OSC COIL) until frequency counter reads 50KHz.

1-2-2. Tape AZIMUTH adjustment

1) Connect the equipments as per Fig.1-8 to adjust the tape azimuth with
test tape (recorded at 6.3KHz : MTT-113N)
2) Play the test tape after inserting in DECK.
3) Adjust the azimuth ajustment screw of left side of record/play head for maximum
output and for the same channel phase. (see Fig.1-7)

1-2-3. Tape speed adjustment

1) Connect the equipments as shown in Fig.1-8 adjust the tape speed with
test tape (recorded at 3KHz : MTT-111N)
PRE/REC PART
KC433
Fig.1-6 Recording bias adjustment
Adjustment
R/P head
Adjustment screw
Fig.1-7 Azimuth speed adjustment
UNIT
UNDER TEST
Fig.1-8
Samsung Electronics
Alignment and Adjustments
50KHz
FREQUENCY
COUNTER
VTVM
OSCILLOSCOPE
FREQUENCY
3000Hz
COUNTER
1-3