Sangean WR-2 Service Manual Download Page 12 | Manualshive

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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

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Summary of Contents for WR-2

Page 1: ...ain 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 C...

Page 2: ...6 dB Min output 60dB 98MHz 0 5 3 mv Auto Tuning Stop Sens 98MHz 20 26 dB Current consumption 60dB 98MHz 320 400 mA Spurious rejection 103 35MHz Rated output 98MHz 90 50 dB S N Ratio 60dB DIN Audio 98M...

Page 3: ...db Limiting 1mV 98MHz 10 16 dB Min output 60dB 98MHz 0 5 3 mv Auto Tuning Stop Sens 98 1MHz 20 26 dB Current consumption 60dB 98MHz 320 400 mA Spurious rejection 103 35MHz Rated output 98MHz 90 50 dB...

Page 4: ...56 dB 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 St...

Page 5: ...56 dB 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 St...

Page 6: ...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...

Page 7: ...ion 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 dB m S...

Page 8: ...Hz 66 Max Sensitivity S N 6dB 270KHz 64 dB m 162KHz 62 68 225KHz 60 66 Usable Sensitivity S N 20dB 270KHz 60 66 dB m Image Rejection S N 6dB 270KHz 30 24 dB I F Rejection S N 6dB 162KHz 60 50 dB Selec...

Page 9: ...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...

Page 10: ...rminal 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...

Page 11: ...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 t...

Page 12: ...ments 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...

Page 13: ...SVM 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 gener...

Page 14: ...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...

Page 15: ...l 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...

Page 16: ...TEST POINTS DIAGRAM 16...

Page 17: ...MAIN PCB TOP VIEW 17...

Page 18: ...MAIN PCB BOTTOM VIEW 18...

Page 19: ...CONTROL PCB TOP VIEW 19...

Page 20: ...CONTROL PCB BOTTOM VIEW 20...

Page 21: ...WIRING DIAGRAM 21...

Page 22: ...it C22 and C34 No Yes Check IF waveform Check CF2 CF3 T2 2 Weak sensitivity in AM band Yes Is the reception in MW band O K Check the antenna circuit and antenna terminal No Yes Check IF waveform Check...

Page 23: ...CH DIODE 1SS367 1 D 200 1041241TA DIODE FR204 T 3 D 10 300 301 1043140 CH VARICAP SVC383 S 1 D 7 1043180 CH VARICAP SVC220 3 D 1 6 8 1046071 A CH DIODE WAP202U 1 D 204 1046180 CH DIODE HBAV99 2 D 4 11...

Page 24: ...T1 EL 105M 50V 5x11 1 C 104 444756PT1 EL 475M 50V 5x11 3 C 21 65 76 441066PT1 EL 106M 50V 5x11 2 C 44 47 444763PT1 EL 476M 16V 5x11 3 C 9 96 116 441072PT1 EL 107M 10V 5x11 3 C 89 92 103 441075KT1 EL 1...

Page 25: ...5 R 18 23 46 82 238 6100133 CH RD 1 16W 560J C 1 R 229 6100134 CH RD 1 16W 680J C 1 R 37 6100136 CH RD 1 16W 1KJ C 14 R 17 39 40 57 63 79 99 100 104 106 226 228 236 273 6100138 CH RD 1 16W 1 5KJ C 1...

Page 26: ...6160194 CH RD 1 10W OJ A 2 JP 2 28 6500440 CH RP 2 2KJx4 C 9 R 217 219 221 222 225 232 235 241 8000040 W JUMP 10 10 0 6mm 12 JP 1 4 9 14 16 18 21 23 26 29 8000061 W JUMP 20 10 0 6mm 6 JP 3 7 11 15 22...

Page 27: ...1A LCD LENSx2 26 23M5000 BAR ANT SPONGE 1 A4 M5 13 27 23M7000 EVA SPACER 227x4 2 A4 WR2 24A 28 23M7010 EVA SPACER 107x4 2 A4 WR2 25A 29 23M7030 DOUBLE TAPE 3 A4 WR2 22A 30 23M7040 DOUBLE TAPE 35x5 11...

Page 28: ...P 2 6x12 NI 2 PHONE JACK PCBx2 56 9103102 SCREW PTP 3X10 NI 2 AC JACKx2 57 9153082 SCREW PTPW 3x8 NI 2 TRANSx2 58 9163082 SCREW PTB 3 0x8 NI 10 SPEAKERx4 C PCBx4 BOSS HOLDERx2 59 9163142 SCREW PTB M3x...

Page 29: ......

Page 30: ...1 IC1 LA1177 2 IC2 TA2099F IC CIRCUIT BLOCK DIAGRAM 30...

Page 31: ...3 IC3 BA09T 4 IC4 TDA7313D 31...

Page 32: ...5 IC5 TDA7266L 6 IC6 TC7S66FU 32...

Page 33: ...7 IC7 NJM4580D 8 IC8 PT2308 33...

Page 34: ...9 IC200 H7805AM 10 IC201 XC62AP4002 34...

Page 35: ...11 IC202 TC9324F 35...

Page 36: ...12 IC203 BU1924F 13 IC204 XC61CN2002MR 36...

Page 37: ...14 IC205 XC61CN3502MR 37...

Page 38: ...3 6 8 0 0 20 1 9 2 2 8 4 5 22 3 5 9 8 5 9 1 8 1 8 21 2 0 2 0 9 4 5 23 4 5 10 0 0 22 2 0 2 0 10 4 5 24 4 5 11 7 4 7 4 23 8 9 9 0 11 4 5 25 4 5 12 1 3 1 3 24 2 0 2 0 12 4 5 26 0 13 4 5 27 4 1 14 4 5 28...

Page 39: ...5 2 0 2 0 2 0 2 0 2 0 49 4 0 4 0 4 0 4 0 4 0 83 4 0 4 0 4 0 4 0 0 16 2 0 2 0 2 0 2 0 2 0 50 0 0 0 0 4 0 84 4 0 4 0 4 0 4 0 4 0 17 2 0 2 0 2 0 2 0 2 0 51 0 0 0 0 4 0 85 4 0 4 0 4 0 4 0 4 0 18 2 0 2 0 2...

Page 40: ...U1924F IC204 XC61CN2002MR IR200 PNA4312M PIN FM PIN FM PIN FM 1 0 1 4 1 VCC 5 0 2 0 2 0 1 GND 0 3 2 16 3 4 0 OUT 4 0 4 2 13 5 4 0 6 0 1 7 0 1 8 2 15 9 0 1 10 0 1 11 0 1 12 4 31 13 1 6 14 2 13 15 0 16...

Page 41: ...9 0 E 0 1 0 1 0 1 0 1 Q12 C 0 2 E 7 3 7 3 B 4 1 4 1 0 18 0 1 E 0 B 7 7 7 8 Q204 C 0 1 0 1 3 46 4 4 B 4 0 Q4 C 8 8 8 8 E 4 1 0 2 4 1 0 1 Q13 C 0 1 E 0 0 B 0 1 0 1 0 1 0 1 E 1 1 B 0 1 3 9 Q205 C 0 1 2 6...

Page 42: ...3 A C UNR5211 UNR5113 C 2SK433B G UNR5210 UNR5110 C BAV99 SVC220 WAP200U 2SC4081 2SB1295 SVC383 A Anode C Cathode FR204 1SS367 E Emitter C Collector B Base 3SK263 2SC4154 2SC1623 2SA812 Transistors Di...

Page 43: ...MAIN SCHEMATIC DIAGRAM 43...

Page 44: ...CONTROL SCHEMATIC DIAGRAM 44...

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