Samsung MM-ZS8 - Cassette Deck Tape Speed Calibration; Cassette Deck Playback Level and Bias Adjustment

Alignment and Adjustments
1-2 Samsung Electronics
Alignment and Adjustments
(GND)
VTVM
2-1. To Adjust Tape Speed
1) Measuring tape: i) MTT-111 (or equivalent)
(Tapes recorded with 3kHz)
ii) MTT-5512 (or equivalent)
2) Connect the SPK OUT of the MAIN PCB to the fre-
quency counter as in figure 1-5.
1) Before the actual adjustment, clean the play/recording
head.
2) Measuring tape :
i) MTT-114N(or equivalent 10kHz AZIMUTH control)
ii) MTT-5512
3) The cassette deck is connections as shown in figure 1-7.
Notes
Notes
NOR
SPEED
Control
1
SPK OUT
(connected
to the frequency
counter)
Fixed
3KHz
Remark
Standard
To Adjust
Pre-Setup
Item
Step
Pre-Setup
Condition
1) Deck :MTT-111
2) Press PLAY
SW button
AZIMUTH
1
SPK OUT
(VTVM is
connected to
the scope)
- Turn the control
screw to as shown
in Figure 1-6.
Max output
and same phase
(both channels)
After
adjustment
secure it with
REGION
LOCK.
Remark
Standard
To Adjust
Pre-Setup
Item
Step
Pre-Setup
Condition
After putting MTT-
114N into Deck 1
- Press FWD PLAY
button.
1
2
- Turn the control
screw to as shown in
Figure 1-6.
MAX OUTPUT
and same phase
(both channels)
CHECK TO
7mV(±0.5mV)
Remark
Standard
To Adjust
Pre-Setup
Item
Step
Pre-Setup
Condition
After putting MTT-
5512 into Deck 2
1) Press REC PLAY button.
2) TAPE PCB JCW3 ,connected
to VTVM
Recording
Bias
Voltage
2-2. To Adjust PlayBack Level/REC
2. Adjust Deck 2 Play Level/ REC BIAS
1. Adjust Deck 1 Play Level
SPK OUT
Figure 1-7
In Out
MAIN PCB
Oscilloscope
2. Cassette Deck
±1%
range
Figure 1-8
Audio OSC.
SET
(MAIN PCB)
Oscilloscope
AUX IN
VTVM
IN
SPK OUT
IN OUT
TP
AZIMUTH
Figure 1-6
Recording /Play head
AZIMUTH control screw
(RVS Play)
AZIMUTH control screw
(FWD Play)
SPK OUT
(VTVM is con-
nected to the
scope)
Fig 1-8
- Turn JSR2L,JSR2R
to the right and left
After adjust-
ment secure
it with
REGION
LOCK.
After putting MTT-
114N into Deck 2
- Press FWD PLAY
button.
MAIN PCB
output
SPK OUT
Frequency Counter
Figure 1-5