Sangean WFR-20 Manual de usuario

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

Specification

AUX-IN & LINE OUT ELECTRICAL PERFORMANCE

Model: WM201 Brand: ROBERTS Temp: 25 ℃R. H. : 75 % Date:2007/6/14

Condition Value Test No.

Test Item Input Output Freq. Nom. Lim. 1. 2.

Unit

4.5 3.5 W

Output Power SP/HP AUX IN= 1V/100Hz

THD=10% 2.8 2

AUX IN

Dynamic Range

Output=R.0 (ATT=0)

THD=3%

AUX IN=1K 1 0.5 V

I/S (Input Sensitivity) AUX IN=100Hz，ATT=0

THD=10%

Volume=MAX 200 ±50 mV

0.1 0.4

DISTORTION SP/HP AUX IN =I/S 1KHz

OUT=50mW/1mW 0.1 0.4 %

0.2 1

MIN OUTPUT SP/HP AUX IN = GND

Volume= 1step 0.1 0.5 mV

S/N RATIO AUX IN =I/S 1KHz&GND

OUT=R.O with 20kHz LPF 65 55 dB

100 8 5

Frequency Response AUX IN=I/S/1KHz

OUT=50mW=0dB 10K 8 5

LINE OUT LEVEL

(REC OUT IMPD=10K) MP3 1KHz 128kbps 1000 ±80 mV

LINE OUT S/N

(REC OUT IMPD=10K) MP3 1KHz 128kbps

with 20kHz LPF 65 55 dB

LINE OUT THD MP3 1KHz 128kbps 0.1 0.4 %

MP3 1KHz 128kbps 65 55 dB

Channel Separation

with 20kHz LPF AUX IN=I/S/1KHz 65 55 dB

127Hz 0 ±2

LINE OUT Frequency Response 10007Hz 0 ±2 dB

Supply Voltage: AC230V/50Hz SP/HP R.O.: 50mW/1mW Load: 8/32 Ohm Modulation:

1KHz/30% Mod

Remark:

( )首件產品 ( )客戶抽測:

( )成品 ( )例行抽測 ( )業務樣品:

( )半成品 ( )新機種 ( )工程變更:

Approved by Released/Tested by

BLOCK DIAGRAM

MAIN PCB TOP VIEW

MAIN PCB BOTTOM VIEW

CONTROL PCB TOP VIEW

CONTROL PCB BOTTOM VIEW

WIRING DIAGRAM

TROUBLESHOOTING FLOW CHART

( 1 ) Power can not be turned on

Yes

Check EN301.

Check whether the pin 36 of IC4

is 3.3V DC.

Yes

Check whether the pin 2 of CN1 is

3.3V DC.

Check whether the pin 2 of J302 is

3.3V DC.

No Yes

Check whether the pin 3 of IC2 is

3.3V DC.

Check IC304.

Check T1.

( 2 ) Wireless does not work

Yes

Check whether the wireless adaptor

can normally work.

Check whether the wired is selected

or inserted.

Yes

Check whether the pin1 of W301 is

about 5V DC

Check whether module1 can work

normally.

Yes

Check whether the pin4 of W305 is

5V DC.

Check Q303, Q306.

Check T1.

Check whether the pin3 of IC1 is

5V DC.

( 3 ) Wired does not work

Yes

Check whether JK5 (RJ45 jack) can

normally work.

Check whether IC5 can normally

work.

Yes

change JK5(RJ45 jack).

Check whether the pin37&39 of IC4

transmit correct data.

Yes

Check whether the W302 circuit can

normally work.

Check Q303, Q306 circuit.

Check whether J302 can normally

work, especially pin 24, 26.

Check whether IIS circuit can

normally work.

Check whether wireless is selected

for software.

Yes

Check whether wireless is selected.

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