Page 1
ADJUSTMENTS
1. TEST & ADJUSTMENT POINT
C
Figure 1.
G
A
B
D
1
Page 2
2. FM ADJUSTMENT
Figure 2.
(1) The impedance of FM antenna terminal is 75
Ω.
Therefore, connect coaxial cable (3C-2V etc.) between FM SG and antenna terminal when wiring.
Item
Type
Open indication
type
Load or close
indication type
FM SSG
Attenuator
Indication
0dB
60dB
0dB
54dB
Available
Power
Rato
5.2dBf
65.2dBf
11.2dBf
65.2dBf
Antenna
Terminal
Voltage
6dB/uV
66dB/uV
12dB/uV
66dB/uV
(2) There are two kind in indication of FM SG output attenuator
1) Attenuator with marking of 75Ωopen ... open indication type.
2) Attenuator with marking of 75Ωload or close ... load or close indication type.
(3) FM SG output level in this FM adjustment are described as open indication type. The left table shows
relations among FM SG attenuator indication (dB), available power ratio (dBf) and antenna terminal voltage
(dB/uV) in each indication type.
NOTE:
1. BAND Switch .................................................................................................................................. FM
2. BALANCE .................................................................................................................................... Center
3. TREB/BASS .................................................................................................................................. Center
4. Connect as shown in figure 2.
5. Refer to figure 1 for Adjustmenu Points.
STEP SUBJECT
1 Discriminator
FM Search
2
Level Adj.
FEED SIGNAL
FROM TO
98MHz 60dB
No Dev.
FM SSG
98Mhz
Wonted Stop
Level (dB)
FM SSG
ANT Jack
or
Point C
Same as
above
MEASURE OUTPUT ADJUSTMENT ADJUST FOR REMARK
Between Point A & Point
B, DC Volt Meter.
Between Point D & GND
DC Volt Meter
T101 DC 0V ±10mV
VR101 DC 1.6V ±0.1V
2
Page 3
3. AM(MW) ADJUSTMENT
Figure 3.
NOTE:
1. BAND Switch ................................................................................................................... AM(MW)
2. Connect as shown in figure 3.
3. Refer to figure 1 for Adjustment Points.
STEP SUBJECT
520 or 522kHz
1
Tuning Voltage
Adj.
2 IF Coil Adj.
3 603kHz RF Adj.
FEED SIGNAL
FROM TO
No Input
603kHz
ANT input, 30dB,
400Hz(30%MOD)
AM SSG.
603kHz
ANT input, 30dB,
400Hz(30%MOD)
AM SSG.
ANT
Jack or
Point C
Same as
above
MEASURE OUTPUT ADJUSTMENT ADJUST FOR REMARK
FL Display
(Reception Frequency)
Between Point G & GND,
DC Volt Meter.
Output L or R ch,
VTVM & Oscilloscope
FL Display
(Reception Frequency)
Output L or R ch,
VTVM & Oscilloscope
Tuning
(Up/Down)
Switch
L206 DC 1.2V ±0.1V
T201 & T202 Max. Output
Tuning
(Up/Down)
Switch
L204 & L205
522kHz
Max. Output
3
Page 4
4. LW ADJUSTMENT
Figure 4.
NOTE:
1. BAND Switch ............................................................................................................................ LW
2. Connect as shown in figure 4.
3. Refer to figure 1 for Adjustment Points.
STEP SUBJECT
144kHz
1
Tuning Voltage
Adj.
160kHz
2
RF Adj.
FEED SIGNAL
FROM TO
No Input
160kHz
ANT input, 30dB,
400Hz(30%MOD)
AM SSG.
Same as
above
MEASURE OUTPUT ADJUSTMENT ADJUST FOR REMARK
FL Display
(Reception Frequency)
Between Point G & GND,
DC Volt Meter.
FL Display
(Reception Frequency)
Output L or R ch,
VTVM & Oscilloscope
Tuning
(Up/Down)
Switch
L253 DC 1.4V ±0.1V
Tuning
(Up/Down)
Switch
L251 & L252 Max. Output
144kHz
4
Page 5
5. CASSETTE DECK ADJUSTMENT
(1) Before this adjustment, clean PLAYBACK head surface.
(2) For this adjustment, use test tape MTT-114.
(3) VOLUME .......................................................................................................................................... Maximum
(4) BALANCE .............................................................................................................................................. Center
(5) TREB/BASS ........................................................................................................................................... Center
(6) Connect as shown in figure 5.
Figure 5.
Screw Driver
Pinch Roller
Head
Head Azimuth
Adjustment Screw (REW)
Head Azimuth
Adjustment Screw (FWD)
Figure 6.
STEP SUBJECT MEASURE OUTPUT SETTING ADJUSTMENT ADJUST FOR REMARK
P.B. Head Adj.L-CH, R-CH, VTVM and
Scope See figure 5.
Playback(FWD &
REW) the TEST
TAPE MTT-114
Adjust the
azimuth
adjusting screw
(in figure 6.)
MAX. Output
both channels
on FWD and
REW PLAY
After this
adjustment, lock
the screw with
paint
5
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