Sangean MS-103 User manual

MODEL: MS-103 FM/MW/SW1/SW2-10
MODEL: MS-103L FM/MW/LW/SW1-9
12 BAND RECEIVER
AKRLNK.
SIO/FO5
Service
Manual
SANGEAN |
PELL

CONTENTS
SPEC
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ATION:
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TUNER
ALIGNMENT
INSTRUCTION
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8-11
TEST
EQUIPMENT
CONNECTION
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TUNER
ADJUSTMENT
POINTS
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12
DISASSEMBLY
DIAGRAM
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13
SCHEMATIC.
DIAGRAM
(1038)
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SCHEMATIC
DIAGRAM
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PCB
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DIAGRAM
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16
PCB
BOTTOM
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DIAGRAM
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PCB
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DIAL
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STRINGING
DIAGRAM.
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DISASSEMBLY
INSTRUCTION
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— 1 eee

SPECIFICATIONS
FM ELECTRICAL PERFORMANCE
Tuning range
Intermediate freq. ; +0.1
Nominal
Bure ee
gonna = [26 a
Useable sens. (S/N 30db) 98MHz 20 | 26 ft
90MHz
Calibration 98MHz
480
7 ewe 200 [400 ie
Audio fidelity (—6db)
98MHz 4000 3600
3db Limiting (10mV) 98MHz
a ro)
N
N}]M
a};o
| db
ToewiHe [20 |
oowHe Pe |
geMHz
Output power at 10% T.H.D. 98MHz 150 120
Power consumption at R.O. 98MHz 110
98MHz
2eMHe
Am. suppression 98MHz
genre
S/N Ratio (mV) 98MHz
Supply voltage : DC 3V R. O. : SOmW Load : 8 ohm
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Modulation : 1kHz 22.5kHz Dev.
SW: ELECTRICAL PERFORMANCE (only MS-103)
Test Item Condition
. Min.
Tuning range
Max.
Intermediate freq.
2.75MHz
| Max. sens. 4.0MHz
5.0MHz
2.75MHz
4.0MHz
5.O0MHz
2.5MHz
Calibration 4.0MHz
5.0MHz
5.0MHe
2.0MHz
4.oNe
Supply voitage : DC 3V R. O. : 5SOmW Load : 8 ohm
Nominal
afa ain
a; wWiNy
Useable sens. (S/N 20db)
| ze |
nN
oO
w N
mfo aln
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cp
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Modulation : 1kHz 30% Mod.
j
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|
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MW ELECTRICAL PERFORMANCE
|
Min
Tuning
range
-
Max.
1640
1620
kHz
460
Intermediate
freq.
+3.5
kHz
Max.
sens.
1000kHz
56
1400kHz
o
dby
nn
na {o)
Useable
sens.
(S/N
20db)
1000kHz
58
db.
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Sp] NM
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ajay s o Oo; oO1o
H
kHz
x) x
<
NUN
600kH2
Calibration 1000kKHz na
1400kHz +40
250
Freq. Response (—6db) 1000kHz
2400 2000
;
N
=
< N
TOOoKTE 55
T.H.D. (5mV) 1000kHz
Whistle modulation (5mV) 21F/3IF
Lowest battery voltage 1000kHz
Tuning indicator sens
S/N Ratio (SmV)
Supply voltage : DC 3V R. O. : 50mWw
x
xix
nN o
&
1000kHz 58
1000kHz 32
Load : 8 ohm Modulation : 1kKHz 30% Mod.
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nN Oo
LW ELECTRICAL PERFORMANCE (only MS-103L)
Test Item Condition | Nominal | Limit
Tuning range Max 38 281
Intermediate freq.
170kHz
Max. sens. 220kKHz
270kHz
170kHz
220kHz
270kHz
170kHz
Calibration 220kHz
270kHz
Supply voltage : DC 3V R. O. : 50mW Load : 8 ohm
a
>) nN
Useable sens. (S/N 20db)
Ny Q
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={M] Oo; an oO
fal
‘
Modulation : 1kHz 30% Mod.
Nh
N
i

ao ELECTRICAL PERFORMANCE
7.0 - 7.52 7.05 - 7.45
11.50 - 12.20 11.60 - 12.10
Tuning range 13.50 - 13.91
kH,
See Sws 17.40 - 17.98
See sw9g 21.40 - 21.95
Intermediate freq. a
(SW4) SW5: 11.8MHz
Max. sens.
(SW5) SW6: 13.7MHz
(SW8) SWS: 21.8MHz
(SW9) SW10: 25.8MHz
(SW1) SW2: 6.1MHz
Useable sens. (SW5) SWE: 13.7MHz
(SW6) SW7: 15.3MHz
(SW7) SW8: 17.8MHz
(SW8) SW9: 21.8MHz
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(SW9) SW10: 25.8MHz
Nh ©
Calibration
Image rejection
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(SW4) SW5: 1:1.8MHz
(SW5) SWE: 13.7MHz
(SW6) SW7: 15.3MHz
(SW7) SW8: 17.8MHz
(SW9) SW10: 25.8MHz
R. ©. : 5SOmWw Load : 8 ohm Modulation : 1kKHz 30% Mod.
Tuning Ind. sens.
Supply voitage : DC 3V
Note: MS-103->SW2-10
MS-103L—>SW1-9

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TUNER ALIGNMENT INSTRUCTION
FM SECTION
Tuning Ga g
FM
Signal
Generator
87.35+0.15MHz
4
Adjust
for
Max.
o
itp
t
to
Ant.
terminal
output
Tuning
gang
;
108+0.25
MHz
fully
open
VT4
Adjust
for Max.
output
TRACKING
cee
MW SECTION
feseee il S0MHz Tune to signal L3 Adjust for Max. output
Circuit Alignment Equipment Connection Dial Setting Adjustments
106MHz Tune to signal VT3 Adjust for Max. output
AM Signal Generator
IF 4 460kHz
with loop Ant. output
meter (VTVM) across
8 ohm load (Fig.1)
Tuning gang :
AM Signal Generator 2 515kHz fully closed L6 Adjust for Max. output
with loop Ant. output Tuning gang "
BAND 3 1650kHz fully open VT2 Adjust for Max. output
TRACKING
LW SECTION (only MS-103L)
600kHz L1 Adjust for Max. output
ee | 4400kHz VT1 Adjust for Max. output
Circuit Alignment Equipment Connection
AM Signal Generator
with loop Ant. output
meter (VTVM) across
8 ohm load (Fig.3)
FM Signal Generator
to Ant. terminal output
meter (VTVM) across
8 ohm load (Fig.3)
Tuning gnag
T1 Adjust for Max. output
fully closed
meter (VTVM) across
8 ohm load (Fig.1)
AM Signal Generator
with loop Ant. output
meter (VTVM) across
8 ohm load (Fig.1)
Tuning gang .
145kHz L5 Adjust for Max. output
fully closed
Tuning gang
285kHz fully open VT5 Adjust for Max. output
fe ff hagas an a
BAND
TRACKING
meter (VTVM) across
8 ohm load (Fig.1)
AM Singal Generator
with loop Ant. output
meter (VTVM) across
8 ohm load (Fig.1)
170kHz L2 Adjust for Max. output
270kHz Tune to signal VT6 Adjust for Max. output
es ees Hepeat SER saat
Dial Setting Adjustments

49M BAND SECTION
AM Signal Generator
with
12pf
dummy
Ant.
5.85MHz
Tuning
Gang
L16
Adjust
for
output
meter
(VTVM)
(1kHz
Moa)
fully
closed
Max.
output
across
8
ohm load
(Fig.2)
AM Signal Generator
with
12pf
dummy
Ant.
6.1MHz
L7
Adjust
for
TRACKING
output
meter
(VTVM)
(1KHz
Mod)
Max.
output
across 8 ohm load
(Fig.2)
41M BAND SECTION
Circuit Alignment Equipment Connection
AM Signal Generator
with 12pf dummy Ant.
output meter (VTVM)
across 8 ohm load
(Fig.2)
AM Signal Generator
with 12pf dummy Ant.
output meter (VTVM)
across 8 ohm load
(Fig.2)
Dial Setting Adjustments
L17 Adjust for
Max. output
Tuning Gang
fully closed
7.05MHz
(1kHz Mod)
L8 Adjust for
Max. output
7.3MHz
(1kHz Moa)
TRACKING
31M BAND SECTION
Circuit Alignment Equipment Connection | step | Gen. Freq | Dial Setting Adjustments
AM Signal Generator
with 12pf dummy Ant.
output meter (VTVM)
across 8 ohm load
(Fig.2)
AM Signal Generator
with 12pf dummy Ant.
output meter (VTVM)
across 8 ohm load
(Fig.2)
L18 Adjust for
Max. output
9.45MHz
(1kKHz Mod)
Tuning Gang
fully closed
LQ Adjust for
Max. output
Tune to
signal
9.7MHz
(1kHz Mog)
TRACKING
AM Signal Generator
with 12pf dummy Ant. 11.60MHz Tuning Gang L19 Adjust for
output meter (VTVM) (1kHz Mod) fully closed Max. output
across 8 ohm load
(Fig.2)
AM Signal Generator
with 12pf dummy Ant. 11.80MHz Tune to L10 Adjust for
TRACKING output meter (VTVM) (1kHz Mod) signal Max. output
across 8 ohm load
(Fig.2)
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