Samsung MM-J5 Service Manual page 3

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