Grundig-Yacht-Boy-80-Service-Manual电路原理图.pdf

Service DocumentExchange SetEs gelten die Vorschriften und Sicherheitshinweisegemäß dem Service Manual “Sicherheit“, Material-nummer 720108000001, sowie zusätzlich die even-tuell abweichenden, landesspezifischen Vorschrif-ten!The regulations and safety instructions shall bevalid as provided by the “Safety“ Service Manual,part number 720108000001, as well as therespective national deviations.SSServiceManualSicherheitSafetyMaterialnr./Part No.720108000001IK501YACHT BOY 80 WR5408 PLLDieses Service Dokument ist nur in Datenform verfügbarThis Service Document is only available as dataÄnderungen vorbehalten/Subject to alterationMade by GRUNDIG in Germany HS-41 0404http:/www.grundig.comYACHT BOY 80IK501ALIGNMENT INSTRUCTIONS (1) ALIGNMENT FOR AM IF a. Required Instruments AM IF Sweep Generator with Scope b. Alignment Procedure Mode Adjustment Procedure (1) Turn on the radio. (2) Connect the input of the AM IF sweep generation in series with a resister of 1.2K Ohm to the test point TP2 and TP7. (3) Connect the RF output of the AM IF sweep generation in series with a resister of 2.2K ohm to another test point TP3. AM T2 (4) Adjust T2 to have a max. output and best center marker frequency to 450kHz. c. Instrument Connection T2IN OUT1.2K 2.2KRFFM IF Sweep Generator450KHz MarkerTest Point TP2Test Point TP3(2) ALIGNMENT FOR FM IF a. Required Instruments FM IF Sweep Generator with Scope b. Alignment Procedure Mode Adjustment Procedure (1) Turn on the radio. (2) Connect the input of the FM IF sweep generation in series with a resister of 1.2k Ohm to the test point TP4 and TP7. (3) Connect the RF output of the FM IF sweep generation in series with a resister of 2.2k ohm to another test point TP5. (4) Adjust T1 have a max. output and best symmetrical S curve with respect to the FM T1 Center marker frequency of 10.7MHz. c. Instrument Connection T1RF1.2KIN2.2KOUTTest Point TP4Test Point TP5FM IF Sweep Generator10.7MHz MarkerYACHT BOY 80IK501(3) ALIGNMENT FOR FM VOLTAGE TUNING RANGE a. Required Instruments DVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON. (2) Set “ 108 MHz”. (3) Connect at to the test point TP6 and TP7. (4) Adjust L2 for show on 8.5V. L2 (5) Set “87.5MHz” and check on DVM between 2.2V 2.7V. c. Instrument Connection L2Test Point TP6DVM(4) ALIGNMENT FOR AM VOLTAGE TUNING RANGE a. Required Instruments DVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON. (2) Set “ 520 kHz”. (3) Connect at to the test point TP6 and TP7. (4) Adjust T10 for show on 1.10V. T10 VC4 (5) Set “1710 kHz” and adjust VC4 for DVM show on 8.5V. c. Instrument Connection VC4T10Test Point TP6DVMYACHT BOY 80IK501(5) ALIGNMENT FOR LW VOLTAGE TUNING RANGE a. Required Instruments DVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON. (2) Set “ 153 kHz”. (3) Connect at to the test point TP6 and TP7. (4) Adjust T11 for show on 1.20V. T11 VC5 (5) Set “279 kHz” and adjust VC5 for DVM show on 5.00. c. Instrument Connection VC5T11Test Point TP6DVM(6) ALIGNMENT FOR FM SENSITIVITY a. Required Instruments FM Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON. (2) Connect a SSVM to the test point TP8 and TP9. (3) Connect the output of the FM signal generator to the test point TP5 and TP7. (4) Set FM 90 MHz. (5) Adjust L1 to have a max. Audio output. (6) Set FM 106 MHz. (7) Adjust VC1 to have a max. Audio output. L1 VC1 (8) Repeat steps 4-7 until best sensitivity on these two frequency is formed. c. Instrument Connection L1VC1Test Point TP5FM Signal GeneratorTest Point TP8SSVMYACHT BOY 80IK501(7) ALIGNMENT FOR AM SENSITIVITY a. Required Instruments AM Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON. (2) Connect a SSVM to the test point TP8 and TP9. (3) Connect the output of the FM signal generator to the test point TP8 and TP9. (4) Set AM 600 kHz. (5) Adjust L19A to have a max. Audio output. (6) Set AM 1400 kHz. (7) Adjust VC2 to have a max. Audio output. L19A VC2 (8) Repeat steps 4-7 until best sensitivity on these two frequency is formed. c. Instrument Connection AL19VC2Loop AntennaThe radio is locatedperpendicularly tothe Loop Antenna60 cmAM Signal GeneratorTest Point TP8SSVM(8) ALIGNMENT FOR LW SENSITIVITY a. Required Instruments AM Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON. (2) Connect a SSVM to the test point TP8 and TP9. (3) Connect the output of the AM signal generator to a standard loop antenna. (4) Set LW 162 kHz. (5) Adjust L19B to have a max. Audio output. (6) Set LW 270 kHz. (7) Adjust VC3 to have a max. Audio output. L19B VC3 (8) Repeat steps 4-7 until best sensitivity on these two frequencies is formed. c. Instrument Connection B L19VC3Loop AntennaThe radio is locatedperpendicularly tothe Loop Antenna60 cmAM Signal GeneratorTest Point TP8SSVMYACHT BOY 80IK501(9) ALIGNMENT FOR SW 2ND LOCAL OSC a. Required Instruments Frequency counter with higher impedunce probe b. Alignment Procedure Mode Adjustment Procedure (1) Turn the radio ON. (2) Turn the frequency for away from any station to avoid interference. (3) Connect the test probes of frequency counter to TP10 and TP7. AM T8 (4) Adjust T8 to have a reading of 20.9898 20.9902 MHz. Coution : a loading effect could emerge in the circuit if inserted with a lower impedance probe of frequency Counter. c. Instrument Connection T8Freq. CounterTest Point TP10(10) ALIGNMENT FOR SW SENSITIVITY a. Required Instruments AM Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Turn on the radio. (2) Tune the radio band frequency to 15.100 MHz. (3) Feed a signal with modulation from the AM signal generator output to tese point TP5 and connect a SSVM to the speaker (TP8). (4) Tune the generator frequency to exactly the same as that of the radio frequency Displayed. (5) Adjust T6, T7 and T9. T6 T7 T9 (6) Remove steps (5) until test sensitivity. c. Instrument Connection T6AT7T9Test Point TP5AM Signal GeneratorTest Point TP8SSVMYACHT BOY 80IK501(11) ALIGNMENT FOR SW SENSITIVITY a. Required Instruments AM Signal Generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to the ON position. (2) Set the band to SW. SSB switch to ON, and clarify.ur to center position. (3) Feed a signal without modulation from the signal generator to the EXT ANT jack, And connect a SSVM to the test point TP8. (4) Tune the radio frequency to exactly the same as that of the signal generator. VC6(5) Adjust VC6 to have a minimum reading on the SSVM. c. Instrument Connection VC6Test Point TP5AM Signal GeneratorTest Point TP8SSVMYACHT BOY 80IK501YACHT BOY 80IK501YACHT BOY 80IK501