Sangean WR-2 User manual

WR-2
FM RDS/AM PLL SYNTHESIZED
RECEIVER
CONTENTS
Specification ………………………………………………………………………………………………………2-8
Block Diagram ………………………………………………………………………………………………………9
Alignment Instructions……………………………………………………………………………………………10-15
Test Points Diagram…………………………………………………………………………….……….……………16
Main PCB Top View…………………………………………………………………………….……….……………17
Main PCB Bottom View.………………………………………………………………………….……..………..…..18
Control PCB Top View……………………………………………………………………………….………….……19
Control PCB Bottom View……………………………………………………………………………………………20
Wiring Diagram..….………………………………………….………………….….……………..……….21
Troubleshooting Flow Chart..….………………………………………….……………….….……………..……22
Electrical Parts List………………………………………………………………………………....……………23-26
Mechanical Parts List………………………………………………………………….………….…………….27-28
Exploded Views.…………………………………………………………………………….…………….……………29
IC Circuit Block Diagram…………………………………………..…………….………………………………30-37
IC and Transistor Voltage Chart….……………………………..…………………………….…………………38-41
Semiconductor Lead Identifications……………………………………………………………………..……..…42
Main Schematic Diagram………………………………………….…………………………………………………43
Control Schematic Diagram……………………………………….…………………………………………………44

SPECIFICATION
FM. ELECTRICAL PERFORMANCE
Model: WR-2(CE) Brand: SANGEAN Temp: 25 ℃R. H. : 75 % Date:2005/5/20
Condition Value Test No.
Test Item Input Output freq Nom. Lim. 1. 2. Unit
S/N=6dB Min 87.5 ±0.1
Tuning Range S/N=6dB Max 108 ±0.1
MHz
Intermediate freq. S/N=6dB 10.7
±0.1
MHz
90 6 12
98 6 12
Max. Sensitivity S/N=6dB 106 6 12
dBμ
90 12 22
98 12 22
Usable Sensitivity S/N=30dB 106 12 22 dBμ
Image Rejection 127.4MHz R.O. 106 32 26
dB
I.F. Rejection 10.7MHz S/N=6dB 90MHz 60 50 dB
3db Limiting(1mV) 98MHz 10 16 dBμ
Min. output 60dBμ98MHz 0.5 3 mv
Auto Tuning Stop Sens. 98MHz 20 26 dBμ
Current consumption 60dBμ98MHz 320 *400 mA
Spurious rejection 103.35MHz
Rated
output
98MHz 90 50 dB
S/N Ratio 60dBμDIN Audio 98MHz 50 40 dB
Am. suppression 60dBμ98MHz 46 30
dB
Speaker8Ω98MHz 7 6
W
Mod75kHz
**Output Power 100Hz Load 32Ω10% THD 5+5 2+2 mW
T.H.D. (45KHz dev.) R.O. 98MHz 0.2 1 %
Over load capacity 10% THD 98MHz >106
dBμ
100 LOW 8 6
VR=MAX 10K HIGH 8 6 dB
100 LOW 10 8
Audio Fidelity(1K=0dB)
(W/Pre-emphasis)50uS
100/1K 10K/1K VR=5mW 10K HIGH 8 6
dB
Supply Voltage: AC 230V/50Hz R.O：50mW Load: 8 Ohm Modulation: Dev.22.5kHz @400Hz
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*Current consumption at light on and position is max
2

SPECIFICATION
FM. ELECTRICAL PERFORMANCE
Model: WR-2(USA) Brand: SANGEAN Temp: 25 ℃R. H. : 75 % Date: 2005/5/20
Condition Value Test No.
Test Item Input Output freq Nom. Lim. 1. 2. Unit
S/N=6dB Min 87.5 ±0.1
Tuning Range S/N=6dB Max 108 ±0.1
MHz
Intermediate freq. S/N=6dB 10.7
±0.1
MHz
90 6 12
98 6 12
Max. Sensitivity S/N=6dB 106 6 12
dBμ
90 12 22
98 12 22
Usable Sensitivity S/N=30dB 106 12 22 dBμ
Image Rejection 127.4MHz R.O. 106 32 26
dB
I.F. Rejection 10.7MHz S/N=6dB 90MHz 60 50 dB
3db Limiting(1mV) 98MHz 10 16 dBμ
Min. output 60dBμ98MHz 0.5 3 mv
Auto Tuning Stop Sens. 98.1MHz 20 26
dBμ
Current consumption 60dBμ98MHz 320 *400 mA
Spurious rejection 103.35MHz
Rated
output
98MHz 90 50 dB
S/N Ratio 60dBμDIN Audio 98MHz 50 40 dB
Am. suppression 60dBμ98MHz 46 30
dB
Speaker8Ω98MHz 7 6
W
Mod75kHz
**Output Power 100Hz Load 32Ω10% THD 5+5 2+2 mW
T.H.D. (45KHz dev.) R.O. 98MHz 0.2 1 %
Over load capacity 10% THD 98MHz >106
dBμ
100 LOW 7 5
VR=MAX 10K HIGH 8 6 dB
100 LOW 8 6
Audio Fidelity(1K=0dB)
(W/Pre-emphasis)75uS
100/1K 10K/1K VR=5mW 10K HIGH 8 6
dB
Supply Voltage: AC 120V/60Hz R.O：50mW Load: 8 Ohm Modulation: Dev.22.5kHz @400Hz
Remark:
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SPECIFICATION
MW ELECTRICAL PERFORMANCE
Model: WR-2(CE) Brand: SANGEAN Temp: 25 ℃R. H. : 75 % Date:2005/5/20
Condition Value Test No.
Test Item Input Output Freq. Nom. Lim. 1. 2. Unit
S/N=6dB Min. 522 ±1
Tuning Range S/N=6dB Max. 1629 ±1
kHz
Intermediate freq. S/N=6dB 450
±1
kHz
603 kHz 44 54
999 kHz 42 54
Max. Sensitivity S/N=6dB 1404kHz 40 48
dBμ/m
603 kHz 54 60
999 kHz 52 60
Usable Sensitivity S/N=20dB 1404kHz 48 56
dBμ/m
Image Rejection S/N=6dB 1404kHz 36 30
dB
I. F. Rejection (450KHz) S/N=6dB 603 kHz 60 50
dB
Selectivity(±10KHz) S/N=6dB 1404kHz 26 20
dB
Bandwidth(-6dB) S/N=6dB 7 +-3
KHz
T. H. D. ( 5mV ) R.O 2 4 %
Auto Tuning Stop Sens. 59 66 dBμ/m
S/N Ratio (RF 5mV) 32
dB
Current Consumption R.O 320 *400 mA
100
Hz
Audiofidelity
(-6dB) 1K=0dB 2
KHz
**Output power Mod 80%
at100Hz 94dBμ/m 10%THD 5
W
Over Load Capacity 80% 10%THD 100 >90
dBμ/m
A. G. C. F. O. M. 100dBμ/m
999kHz
50 40
dB
Whistle Modulation(5mV/M) 74dBμ/m 2IF/3IF <15
%
Supply Voltage: AC 230 V/50Hz R.O：50mW Load: 8 Ohm Modulation: Dev.30% @400Hz
Remark:
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4

SPECIFICATION
MW ELECTRICAL PERFORMANCE
Model: WR-2(UK) Brand: SANGEAN Temp: 25 ℃R. H. : 75 % Date:2005/5/20
Condition Value Test No.
Test Item Input Output Freq. Nom. Lim. 1. 2. Unit
S/N=6dB Min. 522 ±1
Tuning Range S/N=6dB Max. 1629 ±1
kHz
Intermediate freq. S/N=6dB 450
±1
kHz
603 kHz 44 54
999 kHz 42 54
Max. Sensitivity S/N=6dB 1404kHz 40 48
dBμ/m
603 kHz 54 60
999 kHz 52 60
Usable Sensitivity S/N=20dB 1404kHz 48 56
dBμ/m
Image Rejection S/N=6dB 1404kHz 36 30
dB
I. F. Rejection (450KHz) S/N=6dB 603 kHz 55 40
dB
Selectivity(±10KHz) S/N=6dB 1404kHz 26 20
dB
Bandwidth(-6dB) S/N=6dB 7 +-3
KHz
T. H. D. ( 5mV ) R.O 2 4 %
Auto Tuning Stop Sens. 59 66 dBμ/m
S/N Ratio (RF 5mV) 32
dB
Current Consumption R.O 320 *400 mA
100
Hz
Audiofidelity
(-6dB) 1K=0dB 2
KHz
**Output power Mod 80%
at 100Hz 94dBμ/m 10%THD 5
W
Over Load Capacity 80% 10%THD 100 >90
dBμ/m
A. G. C. F. O. M. 100dBμ/m
999kHz
50 40
dB
Whistle Modulation(5mV/M) 74dBμ/m 2IF/3IF <15
%
Supply Voltage: AC 230 V/50Hz R.O：50mW Load: 8 Ohm Modulation: Dev.30% @400Hz
Remark:
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5

SPECIFICATION
AUX-IN ELECTRICAL PERFORMANCE
Model: WR-2(ALL) Brand: ALL Temp: 25 ℃R. H. : 75 % Date: 2005/3/30
Condition Value Test No.
Test Item Input Output Freq. Nom. Lim. 1. 2. Unit
Output Power AUX IN=0.5V/100Hz
THD=10% 8 6
W
AUX IN
Dynamic Range
Output=R.0 (ATT=0)
THD=1%
AUX IN=100Hz 3 1
Vrms
I/S (Input Sensitivity) AUX IX=100Hz，ATT=0
OUT=7W
Volume=MAX 180 ±30 mV
DISTORTION AUX IN =I/S 1KHz
OUT=R.O 0.07 0.3 %
MIN OUTPUT AUX IN =I/S 1KHz
Volume=MIN 0.7 2
mV
S/N RATIO AUX IN =I/S 1KHz&GND
OUT=R.O 62 50
dB
100 8 6
Frequency Response AUX IN=0.5V/1KHz
OUT=50mW=0dB 10K 6 4
dB
AUX IN =I/S 1KHz 230 ±30
REC OUT LEVEL
(REC OUT IMPD=47K) FM DEV=22.5K@1KHz 120 ±30 mV
ATT1 -3.5 -3
ATT2 -7 -6
AUX ATT AUX=I/S 1KHz
ATT0=0dB
ATT3 -10.5 -9
dB
BASS/TREBLE
CONTROL
AUX_IN=I/S 1KHz
Output=R.0=0dB
BASS@100Hz
Treble@10KHz
BASS
-7 ~ +7 -10~+10 -8~+8 dB
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6

SPECIFICATION
MW ELECTRICAL PERFORMANCE
Model: WR-2(USA) Brand: SANGEAN Temp: 25 ℃R. H. : 75 % Date: 2005/5/20
Condition Value Test No.
Test Item Input Output Freq. Nom. Lim. 1. 2. Unit
S/N=6dB Min. 520 ±1
Tuning Range S/N=6dB Max. 1710 ±1
kHz
Intermediate freq. S/N=6dB 450
±1
kHz
600 kHz 44 54
1000 kHz 42 54
Max. Sensitivity S/N=6dB 1400kHz 40 48
dBμ/m
600 kHz 54 60
1000 kHz 52 60
Usable Sensitivity S/N=20dB 1400kHz 48 56
dBμ/m
Image Rejection S/N=6dB 1400kHz 36 30
dB
I. F. Rejection (450KHz) S/N=6dB 600 kHz 60 50
dB
Selectivity(±10KHz) S/N=6dB 1400kHz 26 20
dB
Bandwidth(-6dB) S/N=6dB 7 +-3
KHz
T. H. D. ( 5mV ) R.O 2 4 %
Auto Tuning Stop Sens. 59 66 dBμ/m
S/N Ratio (RF 5mV) 32
dB
Current Consumption R.O 320 400 mA
100
Hz
Audiofidelity
(-6dB) 1K=0dB 2
KHz
**Output power Mod 80%
at100Hz 94dBμ/m 10%THD 5
W
Over Load Capacity 80% 10%THD 100 >90
dBμ/m
A. G. C. F. O. M. 100dBμ/m
1000kHz
50 40
dB
Whistle Modulation(5mV/M) 74dBμ/m 2IF/3IF <15
%
EXTANT Sens S/N=20dB 1400kHz 19 26
dBμ/m
Supply Voltage: AC 120 V/60Hz R.O：50mW Load: 8 Ohm Modulation: Dev.30% @400Hz
Remark:
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7

SPECIFICATION
LW ELECTRICAL PERFORMANCE
Model: WR-2(UK) Brand: ROBERTS Temp: 25 ℃R. H. : 75 % Date:2005/3/14
Condition Value Test No.
Test Item Input Output Freq. Nom. Lim. 1. 2. Unit
S/N=6dB Min. 153 ±3
Tuning Range S/N=6dB Max. 279 ±3
KHz
Intermediate freq. S/N=6dB Min 450 ±3
KHz
162KHz 68
225KHz 66
Max. Sensitivity S/N=6dB 270KHz 64
dBμ/m
162KHz 62 68
225KHz 60 66
Usable Sensitivity S/N=20dB 270KHz 60 66
dBμ/m
Image Rejection S/N=6dB 270KHz 30 24
dB
I. F. Rejection S/N=6dB 162KHz 60 50
dB
Selectivity(±10KHz) S/N=6dB 270KHz 26 20
dB
Bandwidth (-6dB) S/N=6dB 6 4-9
KHz
T. H. D. 100dB 30 % 3 5 %
S/N Ratio (5mV) 74dBu/m 32 26 dB
**Output power Mod 80% 94dBu/m 10%T.H.D
225KHz
5
W
Supply Voltage: AC 230 V R.O：50mW Load: 8 Ohm Modulation: Dev.30% @400Hz
Remark:
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8

11
1
613
9
3
6 2 3
7 1
7
4
7
16 1
10
49 48
21
AGC
15
25
4 12
83 59
77
F-TERMINAL
7 17 14
22 23 24
CF28
AM OSC L5, D7
24 1
AM FIL. T1, CF1
19
AM/FM SW. Q2
13 2
IC3 BA09T
IC200 H7805
82 58 54 97 60
P.T
IR200
10
23
LR
IC201 4V Reg.
JK3 REC_OUT
FM OSC L1, D1
B.P.F FM TANK
T3, T4, TC3 TC4, D6, D8
FM ANT SW
FM_ANT
IC8 PT2308 H.P AMP JK200
HEADPHONE
Radio ON Q206, Q207
IC2 TA2099F FM IF & AM
AM ANT L2
POWER SW Q208, Q209
JK300
Key in Key in
STN LCD
JK1 AUX IN IC4 TDA7313D
AUDIO CONT. IC
IC1 LA1117 FM FRONT
Power SW. Q1, Q3, Q5
IC7 NJM4580D SOUND IC
IC203 BU1924F RDS IC
8 ohm Speaker
IC202 TC9324F μ-com
Power SW. Q11, Q12
VT. CONT. Q201, Q202
IC5 TDA7266L Power Amp
BLOCK DIAGRAM
9

1. ALIGNMENT FOR AM/LW IF
a. Required Instruments:
AM IF Sweep Generator with scope
b. Alignment Procedure
Mode Adjustment Procedure
(1) Press the power button to turn on the radio.
(2) Connect the input terminal of AM IF sweep generator in series with a
resistor of 1.2k ohm to the TP3 and TP4.
(3) Connect the RF output terminal of AM IF sweep generator to another test
point TP35.
(4) Adjust T1 to have a max. output with a marker frequency of 450 kHz on
AM T1
the sweep scope.
c. Instrument Connection
T1
TP4 TP3
100uF
IN OUT
1.2KΩ
TP3
RF
TP4 TP35
450KHz Marker
AM IF Sweep Generator
ALIGNMENT INSTRUCTIONS
10

2. ALIGNMENT FOR AM/LW TUNING VOLTAGE RANGE
a. Required Instruments:
DVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect the probe of DVM to the test point TP29 and TP4.
(3) Tune the AM frequency to 522 kHz.
AM L5
(4) Adjust L5 to have a reading of 1.2V ±0.04V.
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect the probe of DVM to the test point TP29 and TP4.
(3) Tune the LW frequency to 153 kHz.
LW L6
(4) Adjust L6 to have a reading of 1.2V ±0.04V.
c. Instrument Connection
L6
L5
TP4
TP29
DVM
11

3. ALIGNMENT FOR FM TUNING VOLTAGE
a. Required Instruments
DVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect the probe of DVM to the TP29 and TP4.
(3) Tune the FM frequency to 108MHz.
FM L1
(4) Adjust L1 to have a reading of 7.2V ±0.3V.
c. Instrument Connection
L1
TP4
TP29
DVM
12

WR-2L
4. ALIGNMENT FOR AM/LW SENSITIVITY
a. Required Instruments
AM Signal Generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect a SSVM to the speaker TP7 and TP8 terminals.
(3) Connect an AM signal generator together with standard loop dummy
antenna and feed 30% modulated signal to the AM ferrite bar antenna L2.
(4) Tune the generator frequency to 1404 kHz.
(5) Tune the AM frequency to 1404 kHz and adjust TC1 to have a max.
reading on SSVM.
(6) Return the generator frequency to 603 kHz.
(7) Tune the AM frequency to 603 kHz and adjust L2-1 to have a max.
reading on SSVM.
AM TC1
L2-1
(8) Repeat (4) to (7) as necessary to minimize tracking error.
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect a SSVM to the speaker TP7 and TP8 terminals.
(3) Connect an AM signal generator together with standard loop dummy
antenna and feed 30% modulated signal to the AM ferrite bar antenna L2.
(4) Tune the generator frequency to 270 kHz.
(5) Tune the AM frequency to 270 kHz and adjust TC2 to have a max.
reading on SSVM.
(6) Return the generator frequency to 162 kHz.
(7) Tune the AM frequency to 162 kHz and adjust L2-2 to have a max.
reading on SSVM.
LW TC2
L2-2
(8) Repeat (4) to (7) as necessary to minimize tracking error.
c. Instrument Connection
TC2
MW COIL
LW COIL
TC1
L2-2 L2-1
60 cm
The radio is located
perpendicularly to
the Loop Antenna
Loop Antenna
AM Signal Generator
TP8
TP7
DVM
13

WR-2
4-1. ALIGNMENT FOR AM SENSITIVITY
a. Required Instruments
AM Signal Generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect a SSVM to the speaker TP7 and TP8 terminals.
(3) Connect an AM signal generator together with standard loop dummy
antenna and feed 30% modulated signal to the AM ferrite bar antenna L2.
(4) Tune the generator frequency to 1404 kHz.
(5) Tune the AM frequency to 1404 kHz and adjust TC1 to have a max.
reading on SSVM.
(6) Return the generator frequency to 603 kHz.
(7) Tune the AM frequency to 603 kHz and adjust L2 to have a max. reading
on SSVM.
AM TC1
L2
(8) Repeat (4) to (7) as necessary to minimize tracking error.
c. Instrument Connection
L2 MW COIL
TC1
60 cm
The radio is located
perpendicularly to
the Loop Antenna
Loop Antenna
AM Signal Generator
TP8
TP7
DVM
14

5. ALIGNMENT FOR FM TUNING SENSITIVITY
a. Required Instruments
FM Signal Generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on radio.
(2) Connect a SSVM to speaker TP7 and TP8.
(3) Connect a FM signal generator to TP1 and TP2.
(4) Set the signal generator to 22.5 kHz deviation with 1 kHz modulation.
(5) Always tune the generator frequency to exactly same as the radio band
frequency before adjustment.
(6) Tune the FM frequency to 106MHz and adjust TC3 & TC4 to have a max.
audio output.
(7) Tune the FM frequency to 90MHz and adjust TC3 & TC4 to have a max.
audio output.
FM
T3
T4
TC3
TC4
(8) Repeat (6) to (7) as necessary to minimize tracking error.
c. Instrument Connection
TC4
TC3
T3
T4
TP2
TP1 SSG
TP8
TP7
DVM
15

TEST POINTS DIAGRAM
16

MAIN PCB TOP VIEW
17

MAIN PCB BOTTOM VIEW
18

CONTROL PCB TOP VIEW
19

CONTROL PCB BOTTOM VIEW
20