SAMSUNG max870, max878 Alignment and Adjustments
Samsung Electronics
4. Alignment and Adjustments
4-1 Tuner
4-1
FM THD Adjustment
Output
Output
450kHz
60 dB
Minumum Distortion (0.3% below)
(Figure 4-1)
SSG FREQ.
Adjustment
point
(TL3)
98 MHz
FM DETECTOR COIL
FM Search Level Adjustment
Adjust IVR1 so that “TUNED” of FLT is
lighted (Figure 4-2)
Figure4-2 FM Auto Search Level Adjustment
*Adjust FM S.S.G level to 23dB
Figure4-1 IF CENTER and THD Adjustment
SSG FREQ.
Adjustment
point
(TSR2)
98 MHz
BEACON
SENSITIVITY
SEMI-VR(5KΩ)
FM S.S.G
GND
23 dB
FM S.S.G
Output
GND
Speaker
Terminal
FM
Antenna
Terminal
Distortion Meter
Input
SET
Input
output
Oscilloscope
FM IN
FM Antenna
SET
5 kΩ
TSR1
AM TUND
TL3
FM T.H.D
TSR2
FM TUND
Alignment and Adjustments
4-2 Samsung Electronics
4-2-1 To Adjust Tape Speed
1) Measuring tape: i) MTT-111 (or equivalent)
(Tapes recorded with 3kHz)
ii) MTT-5512 (or equivalent)
2) Connect the cassette deck to the frequency counter
as in figure 4-3.
1) Before the actual adjustment, clean the play/recording
head.
2) Measuring tape :
i) MTT-114NA(or equivalent 12.5kHz AZIMUTH control)
ii) MTT-150(or equivalent : Dolby level 200nwb/m)
3) Dolby NR SW OFF
4) The cassette deck is connections as shown in figure 4-5.
Notes
Notes
NOR
SPEED
Control
1
2
OUT
(connected
to the frequency
counter)
Turn JSR5 to
left and right
3KHz
6KHz
Turn JSR6
to left and
right
Remark
Standard
To Adjust
Pre-Setup
Item
Step
Pre-Setup
Condition
Same as above
1) Deck 1:MTT-111
2) Press PLAY
SW button
3) Deck 2:Same
as above
1) Deck 1:MTT-111
2) Deck 2:MTT-5512
3) Press Hi Speed
dubbing SW button
HI SPEED
Control
AZIMUTH
1
2
TP1 OUT
(VTVM is
connected to
the scope)
1) T urn the control
screw to as shown
in Figure4-4.
2) Adjust the right
control screw to
playback REV . Mode
Max output
and same phase
(both channels)
After
adjustment
secure it with
REGION
LOCK.
150mV
L-CH:T urn JSR1L
to the right and
left
R-CH:T urn J SR1R to
the right and left
See the
diagram for
adjustment
locations.
Remark
Standard
To Adjust
Pre-Setup
Item
Step
Pre-Setup
Condition
Same as
above
After putting MTT 114NA into Deck 1
1) Press FWD PLAY
button.
2) Press REV PLAY
button.
PLAY MTT-150
on Deck 1.
PlayBack
out Level
AZIMUTH
1
2
TP1 OUT
(VTVM is
connected to
the scope)
1) T urn the control
screw to as shown
in Figure4-4.
2)Adjust the right
control screw to
playback REV . Mode
Max output
and same phase
(both channels)
After
adjustment
secure it with
REGION
LOCK.
150mV
L-CH:T urn JSR2L
to the right and
left
R-CH:T urn JSR2R to
the right and left
See the
diagram for
adjustment
locations.
Remark
Standard
To Adjust
Pre-Setup
Item
Step
Pre-Setup
Condition
Same as
above
After putting MTT 114NA into Deck 2
1)Press FWD PLAY
button.
2)Press REV PLAY
button.
PLAY MTT-150
on Deck 2.
PlayBack
out Level
4-2-2 To Adjust PlayBack Level
@ Adjust Deck 2 Play Level
! Adjust Deck 1 Play Level
TP1
Cassette Deck
output
LINE OUT
Frequency Counter
Figure 4-3
Figure 4-4
LINE OUT
TP1
Recording /Play head
FWD PLAY
REVERSE PLAY
AZIMUTH control screw
Figure 4-5
In Out
Cassette Deck
Oscilloscope
(GND)
VTVM
4-2 Cassette Deck
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