Cassette Deck; To Adjust Tape Speed; To Adjust Playback Level/Rec - Samsung MAX-S720 Service Manual

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
Pre-Setup
Condition
1) Deck 1:MTT-111
SPK OUT
NOR 2) Press PLAY
1
(connected
SPEED
SW button
Control
to the frequency
3) Deck 2:Same
counter)
as above
Recording /Play head
AZIMUTH control screw AZIMUTH control screw
(FWD Play)
(RVS Play)
Figure 1-6
SET
(MAIN PCB)
Audio OSC.
IN TP
AUX IN SPK OUT
Samsung Electronics
MAIN PCB Frequency Counter
SPK OUT
output
Figure 1-5
To Adjust
Standard
Turn VSR1 to
3KHz
left and right
(FRONT PCB)
Oscilloscope
MAIN PCB VTVM
SPK OUT
(GND)
In Out
Figure 1-7
VTVM
Oscilloscope
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 :
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
Item
Step
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
Alignment and Adjustments
Pre-Setup
Standard
To Adjust
After putting MTT -
- T urn the control
114N into Deck 1
screw to as shown Max output
- Press FWD PLAY
in Figure 1-6. and same phase
(both channels)
button.
Standard
Pre-Setup To Adjust
After putting MTT -
114N into Deck 2
- T urn the control
MAX OUTPUT
- Press FWD PLAY
screw to as shown in and same phase
Figure 1-6. (both channels)
button.
After putting MTT -
5512 into Deck 2
CHECK TO
- T urn JSR2L,JSR2R
1) Press REC PLAY button.
7mV(±0.5mV)
to the right and left
2) T APE PCB JCW3 ,connected
to VTVM
Remark
After
adjustment
secure it with
REGION
LOCK.
Remark
After adjust-
ment secure
it with
REGION
LOCK.
1-3