Grundig-Yacht-Boy-50-WR-5405-Service-Manual电路原理图.pdf

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1、Service DocumentExchange SetEs gelten die Vorschriften und Sicherheitshinweisegem dem Service Manual “Sicherheit“, Material-nummer 720108000001, sowie zustzlich die even-tuell abweichenden, landesspezifischen Vorschrif-ten!The regulations and safety instructions shall bevalid as provided by the “Saf

2、ety“ Service Manual,part number 720108000001, as well as therespective national deviations.SSServiceManualSicherheitSafetyMaterialnr./Part No.720108000001IK501YACHT BOY 50 WR5405Dieses Service Dokument ist nur in Datenform verfgbarThis Service Document is only available as datanderungen vorbehalten/

3、Subject to alterationMade by GRUNDIG in Germany HS-41 0404http:/YACHT BOY 50IK501(2) ALIGNMENT FOR FM SENSITIVITY a. Required Instruments FM/AM RF Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to the ON position. (2) Connect a SSVM to the speaker. (T

4、P2, TP3) (3) Connect the FM signal generator to the input terminal of the rod antenna (TP1, TP4) (4) Set the signal of the signal generator to the standard FM band, with frequency deviation to 22.5kHz modulation. (5) With the tuning gang fully closed, set the signal generator to 90 MHz and adjust L1

5、5 (stretch or squeeze) for a maximum reading on the SSVM. (6) With the tuning gang fully open, set the signal generator to 106 MHz and adjust VC1 for a maximum reading on the SSVM. FM L15 VC1 (7) Repeat steps 5 and 6 until the best sensitivity is obtained at both frequencies. c. Instrument Connectio

6、n L15VC1Signal GeneratorTest Point TP4Test Point TP1Test Point TP2Test Point TP3SSVMALIGNMENT INSTRUCTIONS (1) ALIGNMENT FOR FM FREQUENCY RANGE a. Required Instruments FM RF signal generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to the ON position. (2) Connec

7、t a SSVM to the TP2 and TP3. (3) Connect the FM signal generator to the input terminal of the rod antenna (TP1, TP4) (4) Set the signal of the signal generator to the standard FM band, with frequency deviation to 22.5 kHz modulation. (5) With the tuning gang fully closed, set the signal generator to

8、 87.35 MHz0.15 MHz and adjust L16 (stretch or squeeze) for a maximum reading on the SSVM. (6) With the tuning gang fully open, set the signal generator to 108.25 MHz0.25 MHz and adjust VC2E for a maximum reading on the SSVM. FM L16 VC2 (7) Repeat Steps 5 and 6 until the best sensitivity is obtained

9、at both frequencies. c. Instrument Connection VC2L16Signal GeneratorTest Point TP4Test Point TP1Test Point TP2Test Point TP3SSVMYACHT BOY 50IK501(3) ALIGNMENT FOR AM IF a. Required Instruments AM RF Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to th

10、e ON position. (2) Connect a SSVM to the TP2, TP3. (3) Connect the AM signal generator to the loop antenna. AM CF 1 (4) Set the signal generator to 460 kHz, with 30% modulation. Set the tuning gang fully closed, and adjust CF1 for a maximum reading on the SSVM. c. Instrument Connection CF1Test Point

11、 TP2Test Point TP3SSVM(4) ALIGNMENT FOR AM FREQUENCY RANGE a. Required Instruments AM RF Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to the ON position. (2) Connect a SSVM to the TP2, TP3. (3) Connect a AM RF signal generator to the loop antenna. (

12、4) Set the signal generator to 516.5 kHz with 30% modulation. Set the tuning gang fully closed, and adjust T2 for maximum reading on the SSVM. (5) Set the signal generator to 1630 kHz. Set the tuning gang fully open and adjust VC4 for a maximum reading on the SSVM. MW T2 VC4 (6) Repeat Steps 4 and 5

13、 until the best sensitivity is obtained at both frequencies. c. Instrument Connection T2VC4Test Point TP2Test Point TP3SSVMYACHT BOY 50IK501(5) ALIGNMENT FOR AM SENSITIVITY a. Required Instruments AM RF Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch t

14、o ON position. (2) Connect a SSVM to the TP2, TP3. (3) Connect the AM RF signal generator to the loop antenna. (4) Set the signal generator to 558 kHz, with 30% modulation. Set the tuning gang fully closed and adjust L17 for a maximum reading on the SSVM. (5) Set the signal generator to 1440 kHz. Se

15、t the tuning gang fully open and adjust VC3 for a maximum reading on the SSVM. MW L17 VC3 (6) Repeat steps 4 and 5 until the best sensitivity is obtained at both frequencies. c. Instrument Connection L17VC3Test Point TP2Test Point TP3SSVM(6) OSCILLATOR ALIGNMENT FOR REMAINDER OF SW BANDS a. Required

16、 Instruments AM RF Signal Generator SSVM b. Alignment Procedure Mode Pr ocedure (1) Set the power switch to ON position. (2) Connect a SSVM to the TP2, TP3. (3) Connect a signal generator with a 10pF dummy antenna. (TP1, TP4) (4) Set the signal generators frequency as noted below (use 1kHz, 30% modu

17、lation). 49m 16m (5) With the tuning gang fully closed, adjust the appropriate coils noted below for maximum reading on the SSVM. Mode Generator Frequency Adjustment 49m 5.8 MHz T4 41m 7.0 MHz T3 31m 9.3 MHz T6 25m 11.43 MHz T5 21m 13.43 MHz T7 19m 15 MHz T9 16m 17.32 MHz T1 c. Instrument Connection

18、 T7T5T1T6T4T3T910pFTest Point TP4Test Point TP1Signal GeneratorTest Point TP2Test Point TP3SSVMYACHT BOY 50IK501T4L1T1Q1TIMELIGHTAM SW2 SW4 SW6SW7AMIC2OSCQ4BufferSwitchQ6, Q7HPWORLDKEYSW103LCDQ106Q107OSCT2SW1ANTL2OSCT3SW3ANTL6OSCT7T5SW5ANTL5,L9OSCOSCT9SW7ANTL11,L7CF4AMPIFFML16IC3HPJACKCF2IFFMDetFMFM

19、/AMSwitchBattJACKVR1TC2FM OSCpowerLED101Q102SW1SW3 SW5SW1SW1L14,3POWERQ2, Q3IC1 TA2111FNSW2ANTSwitchAMPFM OSCQ101AMPIC101TC9318FAX101OSC OSCOSCT6Q9BufferR5, R7BAND DetSW2 SW4 SW6ANT ANT ANTL4,10 L8,12SW1D1SWITCHQ5, Q6SWITCHAMPBUZZTDA2822CF3AMCF1T8FMST/MOSwitchL15LIGHTQ103AM OSCSW1AMOSCTC1DC JACKYACH

20、T BOY 50IK501YACHT BOY 50IK501YACHT BOY 50IK501YACHT BOY 50IK501( 1 ) Weak sensitivity on FM mode Check whether the sensitivity is recovered if antenna is directly Yes Check the antenna terminal and connected to the point between antenna circuit. C17 and C35. No Yes Check IF waveform. Check CF3, CF2

21、, CF5. No Check C31 and L15. ( 2 ) Weak sensitivity in AM band Yes Is the reception in MW/SW band O.K.? Check the antenna circuit and antenna terminal. No No Y Check if band selectors are normal. Check whether If is normal. No Yes Check SW1. Check whether the circuit of the buffer is normal. o Yes N

22、o Check C24 and Q1. Check whether the antenna circuit is normal. (L3, C21) Yes Check T8 and IC1. TROUBLESHOOTING FLOW CHART( 3 ) Power can not be turned on Yes Check Con1 and Jw101. Check whether the pin 31 of IC101 is 3V DC. No Yes Check DC Jack and connecter wire. Check Q5 and Q8. ( 4 ) Display can not be Normal Yes Check whether MW, SW are ok. Check whether FM is ok. No No Check Q9, Q102, con1, Q106, Q107. Check Q4, Q101, con1, Q106, Q107. YACHT BOY 50IK5011. IC1-TA2111N 2. IC2-TDA2822 IC CIRCUIT BLOCK DIAGRAM3. IC101-TC9318FA