Samsung SCM-7270 Service Manual page 15

4-2 Cassette Deck
Samsung Electronics
4-2-1 Additional Test Equipment : Testing Tape
1. MTT-111(or equivalent) : Test tape on which 3 KHz signal is recorded.(Tape speed adjustment)
2. MTT-114(or equivalent) : Test tape on which 10 KHz signal is recorded. (Azimuth adjustment)
Pre-Setup
Item Pre-Setup
Condition
Tape speed
Insert MTT-111 to
(normal
Figure 4-6
Deck A or B
speed)
adjustment
Press PLAY button
Insert MTT-114 to
AZIMUTH
(DECK A,B)
Deck A and Deck B
Figure 4-8
adjustment
Press PLAY button
Speaker
Terminal
SET
Figure 4-6
Recording /Play head
AZIMUTH control knob
Figure 4-7
Speaker
Terminal
SET
(GND)
Figure 4-8
4-2-2 Recording Bias Adjustment
1. Connect frequency counter KC434 and press the REC button.
2. Adjust KT431(BIAS OSC COIL) until frequency counter reads 85 ±0.2KHz.
Alignment and Adjustments
To Adjust Remarks
CSVR801
3 KHz
Maximum
output and identical
Figure 4-7
phase of L,R
channel.
Set the screw
after adjustment
Frequency Counter
IN
REVERSE PLAY
Oscilloscope
VTVM
V H
In Out
4-3