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
IEIC
ATION:
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BLOCK
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7
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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DISASSEMBLY
INSTRUCTION
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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
a (o7) oe)
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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)
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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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ajay s o Oo; oO1o
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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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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
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Useable sens. (S/N 20db)
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Modulation : 1kHz 30% Mod.
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N
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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
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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)
ATONE Dah NEDA RARE SADR LR eS eA ASAIN EARS alienate BE a iN a na a He Et AOC aN NBL Ae up i

21M BAND SECTION
Circuit
Alignment
Equipment
Connection
|
Step
|
Gen.
Freq.
|
Dial
Setting
AM Signal Generator
with
12pf
dummy
Ant.
13.55MHz
Tuning
Gang
L20
Adjust
for
output
meter
(VTVM)
(1kHz
Mod)
fully
closed
Max.
output
across
8
ohm load
(Fig.2)
AM Signal Generator
with
12pf
dummy
Ant.
13.7MHz2
L11
Adjust
for
TRACKING
output
meter
(VTVM)
(1kHz
Mod)
Max.
output
across 8 ohm load :
(Fig.2)
19M BAND SECTION
Circuit Alignment Equipment Connection 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)
15.1MHz
(1kHz Mod)
Tuning Gang
fully closed
L21 Adjust for
Max. output
15.3MHz
2 ({4kHz Mod)
Tune to L12 Adjust for
Max. output
TRACKING signal
16M BAND SECTION
AM Signal Generator
with 12pf dummy Ant. 17. 45MHz Tuning Gang L22 Adjust for
output meter (VTVM) (1kHz Moa) fully closed Max. output
across 8 ohm load
(Fig.2)
AM Signal Generator
_ | with 12pf dummy Ant. 17.8MHz Tune to L13 Adjust for
TRACKING output meter (VTVM) (1kHz Mod) signal Max. output
across 8 ohm load
(Fig.2)
13M BAND SECTION
Circuit Alignment Equipment Connection | step | Gen. Freq. _| Dia! 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)
21.45MHz.
(1kHz Mod)
L23 Adjust for
Max. output
Tuning Gang
fully closed
21.8MHz
(1kHz Mod)
Tune to
signal
L14 Adjust for
Max. output
TRACKING
i
|
|
|
|
i
i
\
i
i
|
|
|
|

11M BAND SECTION
AM Signal Generator
with 12pf dummy Ant. 25.67MHz Tuning Gang L24 Adjust for
BAND output meter (VTVM) {1kHz Mod) fully closed Max. output
across 8 ohm load :
(Fig.2)
AM Signal Generator
with 12pf dummy Ant. 25.8MHz Tune to L15 Adjust for
TRACKING output meter (VTVM) (1kHz Mod) signal Max. output
across 8 ohm load
(Fig.2)
SW: SECTION _ (only MS-103)
Circuit
Alignment
Equipment
Connection
Step
Dial
Setting
1 2.2MHz Tuning gang L5 Adjust for Max. output
fully closed
BAND
5.3MHz
Tuning
gang
VT5
Adjust
for
Max.
output
TRACKING
AM Signal Generator
with 12pf dummy Ant.
output meter (VTVM)
across 8 ohm load
(Fig.2)
2.5MHz Tune to signa} | L2 Adjust for Max. output
AM Signal Generator
with 12pf dummy Ant.
output meter (VTVM)
across 8 ohm load
(Fig.2)
Hf
i
3
§

TEST EQUIPMENT CONNECTION
FIGURE
1.
BAND
/
LW
BAND
“TROGANG.
URE
|}
MW.
IF.
TRACKING
+
VIVM
SCOPE
Teno y |
ae 30
FIGURE
2,
SW_BAND/TRACKING
;
49M-11MBAND
/T
RACKING
S
COPE
ET
=) (ZA g
wot $6 eigls
4ohm = load =
AM SG
Counter 3 oe O
| Freq, 4
Counter SWAN
FIGURE 3, FM BAN D/ TARCKING
SET VTVM SCOPE
FM
SG
ee
ee
Al
(a@
a
ThA oe 5 ort. ol O70
4ohm = 2S =
TUNER ADJUSTMENT POINTS
in| © | @l2][5][o] ra|lo|
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15 jon SW) fot nid
[2
11m
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DISASSEMBLY
DIAGRAM
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+
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(2 2
aa
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TEST EQUIPMENT CONNECTION
VIVM
C fe0en) | SE = va
| mse 10 Ba 7 IS
50n at 15 ofeto
= 4ohmz load =
FIGURE 2,SW BAND/TRACKING ; 49M-11 MBAND /TRACKING
AM SG SCOPE
Counter
| Freq. | | Car
Counter = SWAN Lohr: =. ‘oad be
IGURE 3, |
FIGURE
3.
FM
BAND
/TRACKING
VTVM
SCOPE
j O777O
me O;
- 4ohm =- toad =
SET
a | SI
i ane =)
TUNER ADJUSTMENT POINTS |
|
|

DISASSEMBLY
DIAGRAM
1 '
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DISASSEMBLY DIAGRAM) = REMARK
2046000 Middle Chassis A1-103-0113
A2-103-0098
A3-103-0368
A3-103-0367
A4-103-0990
A4-103-0991
A4-711-0596
RD-043
A4-103-0998
A4-103-0999
A4-103-0994
A4-103-1000
A4-103-1001
A4-103-1008
A4-101-0955
A4-101-10114
a] A4-711-0610
A4-789-0650
A4-789-0656
2046010
2046020
2046030
2046040
2014000
2146001
2146010
2146020
2146030
2146040
2146050
2146060
2145060
2145080
2114050
2116020
2116090
2246010
2346000
2346020
2346040:
2346050
2307000
2335040
2346060
3014600
Pointer Base
Dial Drum
Transfer Lever
VR Shaft
Pulley II
Réd Ant MS-103
Battery Conductor @
Battery SpringO
Speaker Grill
Tuning Shaft
Pulley Pin K
Fastener
12
Speaker Fixed-Bar 1
Dial Spring
Rod Ant Contact
3
Dial String 0.4/384
A4-103-1002
A4-103-1089
Aa. 103-1094
A4-103-1099
A4-701-0376
A4-212-0902 47 Dial Plate-Chassis
A4-103-1126 48 Mian PCB-Back Cover
A1-103-0112 ,
A2-103-0097
A1-103-0114
A4-103-0983
A4-103-0984
A4-103-0985
A4-103-0896
A3-103-0365
A3-103-0366
A4-103-0997
A4-103-0993
A4-101-0971/0976
NO
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apuafalorapua
Double Face Tape(II)
Ant Bar Sponge(l)
Ant Bar Sponge (II)
Battery Sponge
Double Side Tape
Space Sponge
Front Cabinet
Dial Plate-Chassis
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BS
1
1
8
3034600
3044600
3084600
3094600
3104600
3114600
3124600
3214600
3224600
3264500
Back Cover
Battery Cover
nN
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Volume Knob
w oO
Power Knob
Main Band Knob
SW Band Knob
Name Plate
ID Plate
Hand Strap
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