Sangean WFR-20 Service Manual
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Sangean WFR-20 Service Manual

Sangean WFR-20 Service Manual

Wi-fi internet radio
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See also: Operating Instructions
WFR-20
Wi-Fi Internet Radio
CONTENTS
Specification .....................................................................................................................2
Block Diagram .....................................................................................................................3
Main PCB Top View.................................................................................................................4
Main PCB Bottom View..............................................................................................................5
Control PCB Top View.................................................................................................................6
Control PCB Bottom View............................................................................................................7
Wiring Diagram...............................................................................................................8
Troubleshooting Flow Chart......................................................................................................9-12
Electrical Parts List.............................................................................................................13-15
Mechanical Parts List...............................................................................................................16
Exploded Views........................................................................................................................17
IC Circuit Block Diagram......................................................................................................18-21
IC and Transistor Voltage Chart..............................................................................................22-25
Semiconductor Lead Identifications...........................................................................................26
Main Schematic Diagram.......................................................................................................27
Control Schematic Diagram.......................................................................................................28

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Summary of Contents for Sangean WFR-20

  • Page 1: Table Of Contents

    WFR-20 Wi-Fi Internet Radio CONTENTS Specification ………………………………………………………………………………………………………2 Block Diagram ………………………………………………………………………………………………………3 Main PCB Top View…………………………………………………………………………….……….……………4 Main PCB Bottom View.………………………………………………………………………….……..………..…..5 Control PCB Top View…………………………………………………………………………….……….……………6 Control PCB Bottom View.………………………………………………………………………….……..………..…7 Wiring Diagram..….………………………………………….………………….….……………..………….8 Troubleshooting Flow Chart..….………………………………………….……………….….……………..…….9-12 Electrical Parts List………………………………………………………………………………..……………13-15 Mechanical Parts List……………………………………………………………………….………….…………….16 Exploded Views.…………………………………………………………………………….…………….……………17 IC Circuit Block Diagram…………………………………………..…………….………………………………18-21 IC and Transistor Voltage Chart….……………………………..…………………………….…………………22-25...

  • Page 2: Specification

    Specification AUX-IN & LINE OUT ELECTRICAL PERFORMANCE Temp: 25 ℃ Model: WM201 Brand: ROBERTS R. H. : 75 % Date:2007/6/14 Condition Value Test No. Test Item Unit Input Output Freq. Nom. Lim. AUX IN= 1V/100Hz Output Power SP/HP THD=10% Output=R.0 (ATT=0) AUX IN THD=3% Dynamic Range...

  • Page 3: Block Diagram

    BLOCK DIAGRAM...

  • Page 4: Main Pcb Top View

    MAIN PCB TOP VIEW...

  • Page 5: Main Pcb Bottom View

    MAIN PCB BOTTOM VIEW...

  • Page 6: Control Pcb Top View

    CONTROL PCB TOP VIEW...

  • Page 7: Control Pcb Bottom View

    CONTROL PCB BOTTOM VIEW...

  • Page 8: Wiring Diagram

    WIRING DIAGRAM...

  • Page 9: Troubleshooting Flow Chart

    TROUBLESHOOTING FLOW CHART ( 1 ) Power can not be turned on Check whether the pin 36 of IC4 Check EN301. is 3.3V DC. Check whether the pin 2 of CN1 is Check whether the pin 2 of J302 is 3.3V DC.
  • Page 10 ( 3 ) Wired does not work Check whether JK5 (RJ45 jack) can Check whether IC5 can normally normally work. work. Check whether the pin37&39 of IC4 change JK5(RJ45 jack). transmit correct data. Check whether the W302 circuit can Check Q303, Q306 circuit. normally work.
  • Page 11 ( 4 ) LCD does not display Check whether the pin17 of LCD is 3.3V DC and the boost circuit can Check the Q301 circuit. normally work. Check whether the J303 (module) Check MODULE. can normally work Power off or factory reset, then power on again.
  • Page 12 ( 6 ) Aux in can not work Check whether W303 circuit is Check JK3. Normal. Check whether IC301 can normally Check IC301 circuit. Work. Check whether J301(module) can normally work. Check whether IC302 circuit is Normal. ( 7 ) Line out can not output Check whether IC303 can normally Check W304 and JK4.

  • Page 13: Electrical Parts List

    ELECTRICAL PARTS LIST WFR-20 PART NO. DESCRIPTION Q'TY REMARK 1013560-A CH IC XC6203E332PR IC 2,304, 1014280-A CH IC XC62FP6002PRN IC 305, 1015490-A CH IC AD8256A-KG IC 302, 1015500-A CH IC AK4387ET TSSOP16 IC 303, 1015510-A CH IC AK5357ET TSSOP16 IC 301,...
  • Page 14 ELECTRICAL PARTS LIST WFR-20 PART NO. DESCRIPTION Q'TY REMARK 441081KT0-A EL 108M 6.3V 8x11.5-T C 396,415, 441083KT-A EL 108M 16V 10x16-S C 4,40,41, 4433890T-A EL 338M 16V 13x25(5) C 3,13,38, 4900023T0-A EL 228M 25V 13x25 105℃ C 12, 4B47612-A CH TA 476M 6.3V 3.2x1.6...
  • Page 15 ELECTRICAL PARTS LIST WFR-20 PART NO. DESCRIPTION Q'TY REMARK 6132137-A CH RD 1/16W 1.2KF-C R 304, 6132149-A CH RD 1/16W 12KF-C R 302,305, 6132154-A CH RD 1/16W 33KF-C R 308, 6132155-A CH RD 1/16W 39KF-C R 306, 6132164-A CH RD 1/16W 220KF-C...

  • Page 16: Mechanical Parts List

    MECHANICAL PARTS LIST WFR-20 Ref no PART NO. DESCRIPTION Q'TY APP./DWG NO. REMARK 20P1010-A LED FILTER A4-RD22-06 20P1020-A JACK COVER A3-RD22-10 20R1000-A LCD LENS HOLDER A4-R1-01 A4-R1-02 20R1010-A LIGHT LENS 21P5060-A TOOTHED LOCK WASHERS 22P1000-A HEMELON A4-RD22-17 23K7010-A DOUBLE TAPE...

  • Page 18: Ic Circuit Block Diagram

    IC CIRCUIT BLOCK DIAGRAM IC1 – BA05FP IC2 & IC304 – XC6203E332PR...
  • Page 19 IC4 – RTL8150L IC5 – 93LC46BT - I/SN...
  • Page 20 IC301 – AK5357ET IC302 – AD8256A-KG...
  • Page 21 IC303 – AK4387ET IC305 – XC62FP6002PRN...

  • Page 22: Ic And Transistor Voltage Chart

    IC AND TRANSISTOR VOLTAGE CHART IC1 – BA05FP IC2 – XC6203E332PR IC5 – 93LC46BT-I Radio Radio WLAN 1.58 4.92 0.44 4.92 0.44 IC4 – RTL8150L WLAN WLAN WLAN 1.21 3.04 1.21 3.04 3.17 0.44 4.92 0.44 3.15 0.68 0.35 3.15 2.29 0.21 3.04...
  • Page 23 IC301 – AK5357ET IC303 – AK4387ET Radio AUX Radio AUX Radio AUX Radio AUX 1.64 1.64 1.64 1.68 1.64 1.64 1.64 1.64 2.35 1.64 1.64 2.35 1.64 1.64 1.64 1.64 2.35 3.28 3.28 3.28 3.28 IC302 – AD8256A-KG Radio AUX Radio AUX Radio AUX Radio AUX...
  • Page 24 Module voltage J301 Radio J302 WLAN J302 WLAN J303 Radio 3.28 3.28 3.28 3.28 3.25 3.25 3.25 1.57 1.64 1.65 3.25 3.25 3.25 0.82 1.56 0.15 3.28 3.28 3.28 1.64 3.28 3.28 3.28 3.28 1.57 0.15 3.28 3.28 3.28 0.21 2.45 1.64 1.64...
  • Page 25 Transistor Radio WLAN WLAN 0.69 3.28 4.89 0.72 Q302 Q305 10.84 10.84 3.28 4.88 4.96 0.52 0.52 1.35 4.89 3.26 4.87 4.95 3.27 3.28 0.52 0.52 Q303 4.86 3.28 0.50 0.50 3.28 1.35 4.92 11.45 11.45 4.85 4.92 Q304 11.37 11.37 4.86 4.92...

  • Page 26: Semiconductor Lead Identifications

    SEMUCONDUCTOR LEAD IDENTIFICATIONS Transistors 2SC1623 2SB772 SI2315DS 2SC4145 (E:Emitter C:Collector B:Base S:Source G:Gate D:Drain) Diodes RLS4148 ZENER 9.1V 1N5817 ＋ ＋ ～ － － W04M 1.5A BRIDGE 2A/50V (A:Anode C:Cathode)

  • Page 27: Main Schematic Diagram

    MAIN SCHEMATIC DIAGRAM...

  • Page 28: Control Schematic Diagram

    CONTROL SCHEMATIC DIAGRAM...

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