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ICF-S79

FM/AM SYNTHESIZED RADIO

ICF-S79L

FM/MW/LW SYNTHESIZED RADIO

ICF-S79V

TV/WEATHER/FM/AM SYNTHESIZED RADIO

MICROFILM

US Model

ICF-S79V

AEP Model

ICF-S79/S79L

UK Model

ICF-S79L

SPECIFICATIONS

SERVICE MANUAL

ICF-S79/S79L/S79V

Photo: ICF-S79V

Notes on chip component replacement

•

Never reuse a disconnected chip component.

•

Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

Содержание Shower Mate ICF-S79

Страница 1: ...THESIZED RADIO MICROFILM US Model ICF S79V AEP Model ICF S79 S79L UK Model ICF S79L SPECIFICATIONS SERVICE MANUAL ICF S79 S79L S79V Photo ICF S79V Notes on chip component replacement Never reuse a disconnected chip component Notice that the minus side of a tantalum capacitor may be dam aged by heat ...

Страница 2: ... 2 This section is extracted from instruction manual SECTION 1 GENERAL ...

Страница 3: ... 3 ...

Страница 4: ...llow the disassembly procedure in the numerical order given REAR CABINET SECTION 2 DISASSEMBLY 2 six screws BTP 3 25 1 battery case lid 4 rear cabinet 5 antenna lead 5 BATT lead red 3 two claws 5 BATT lead white ...

Страница 5: ...5 kHz 1 490 kHz ICF S79L ICF S79V AM IF ADJUSTMENT Adjust for a maximum reading on level meter T2 455 kHz 5 Repeat the procedures in each adjustment several times and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors SECTION 3 ELECTRICAL ADJUSTMENTS AM LW MW Section Setting BAND switch AM MW or LW 0dB 1 µV FM TV Section Setting BAND switch FM1 or TV I...

Страница 6: ... TRACKING TV TRACKING ICF S79V only T1 TV IF ICF S79V only L2 TV FREQUENCY COVERAGE ICF S79V only CT5 LW FREQUENCY COVERAGE ICF S79L only TV antenna ground JW20 FM TV antenna input JW18 CT1 L1 T2 AM IF FM TRACKING L6 CT4 CT2 L5 LW TRACKING ICF S79L only MW LW L5 IC1 IC2 TP VT MAIN BOARD Component Side MAIN BOARD Conductor Side ...

Страница 7: ... use same type of color marked ceramic filters in order to meet same specifications Therefore the ceramic filter must change two pieces together since it s supply two pieces in one package as a spare parts mark CF1 CF3 SECTION 4 DIAGRAMS 4 1 PRINTED WIRING BOARDS Semiconductor Location D1 G 1 Q1 F 1 D2 F 1 Q2 E 4 D3 E 2 Q3 I 6 D4 E 4 Q4 G 7 D5 H 2 Q5 E 6 D6 H 7 Q6 B 7 D7 G 6 Q7 H 6 D8 F 7 Q9 E 5 D...

Страница 8: ...fed with regulated dc power supply from battery terminal Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark FM TV 2 6 ch AM MW LW 4 2 SCHEMATIC DIAGRAM ICF S79 S79L See page 11 for Waveforms and IC Block Diagrams Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production tolerances Waveforms are taken wi...

Страница 9: ... B Line adjustment for repair Power voltage is dc 4 5 V and fed with regulated dc power supply from battery terminal Voltages and waveforms are dc with respect to ground un der no signal detuned conditions no mark FM TV 2 6 ch AM TV 7 13 ch Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production tolerances Waveforms are taken with a oscilloscope...

Страница 10: ... BIAS MIX OSC RF IN BYPASS RF OUT MIX GND MIX OUT OSC OUT OSC VCC 1 2 3 4 5 6 7 8 9 10 15 14 13 12 11 FM DISCRIMINATOR AF POWER AMP AM FE FM IF TUNING METER AM IF DET AGC FM FE 23 22 21 20 24 25 19 18 17 16 29 28 27 26 30 GND GND AF OUT VCC RIPPLE FILTER AF IN DET OUT AFC AGC AFC AGC IF GND METER N C FM IF IN AM IF IN FM AM BAND SELECT FM AM IF OUT N C FE GND AM RF IN FM RF REG OUT FM OSC FM RF IN...

Страница 11: ...kHz 26 VREG2 Power supply terminal connected to the coupling capacitor 27 VLCD0 28 CAP0 29 CAP1 30 VLCD2 31 to 34 COM0 to COM3 O Common drive signal output to the liquid crystal display LCD1 35 to 48 LCD0 to LCD13 O Segment drive signal output to the liquid crystal display LCD1 49 LCD14 O Segment drive signal output terminal Not used open 50 CE I Power failure detection signal input from the IC5 N...

Страница 12: ...3 4 6 7 8 9 10 12 13 14 15 16 17 18 1 X 3374 190 1 CABINET FRONT ASSY S79V 1 X 3374 190 2 CABINET FRONT ASSY S79L 1 X 3374 190 3 CABINET FRONT ASSY S79 2 3 016 880 01 PLATE BUTTON SHEET S79V 2 3 016 880 11 PLATE BUTTON SHEET S79 S79L 3 3 016 863 01 CHASSIS 4 A 3679 918 A MAIN BOARD COMPLETE S79 4 A 3679 919 A MAIN BOARD COMPLETE S79V 4 A 3679 921 A MAIN BOARD COMPLETE S79L 6 3 016 875 01 SHEET BAT...

Страница 13: ...OMPLETE S79 A 3662 879 A MAIN BOARD COMPLETE S79V A 3662 888 A MAIN BOARD COMPLETE S79L INCLUDING KEY BOARD 3 016 863 01 CHASSIS BAND PASS FILTER BPF1 1 236 711 21 FILTER BAND PASS S79 S79L BPF1 1 239 813 21 FILTER BAND PASS S79V BPF2 1 233 521 11 FILTER BAND PASS S79V CAPACITOR CHIP CONDUCTOR C1 1 163 141 00 CERAMIC CHIP 0 001uF 5 50V S79V C2 1 163 141 00 CERAMIC CHIP 0 001uF 5 50V S79V C3 1 163 ...

Страница 14: ...163 108 00 CERAMIC CHIP 43PF 5 50V C81 1 163 099 00 CERAMIC CHIP 18PF 5 50V C82 1 163 038 00 CERAMIC CHIP 0 1uF 25V C83 1 163 038 00 CERAMIC CHIP 0 1uF 25V C84 1 164 232 11 CERAMIC CHIP 0 01uF 50V C85 1 163 038 00 CERAMIC CHIP 0 1uF 25V C86 1 164 232 11 CERAMIC CHIP 0 01uF 50V C87 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C90 1 164 232 11 CERAMIC CHIP 0 01uF 50V C92 1 163 251 11 CERAMIC CHIP 100PF ...

Страница 15: ...RANSISTOR DTA144TKA T146 Q7 8 729 901 73 TRANSISTOR 2SC2412K S79L Q9 8 729 027 60 TRANSISTOR DTC144TKA T146 Q10 8 729 921 72 TRANSISTOR 2SD1781K R S79L Q11 8 729 402 19 TRANSISTOR XN6501 Q12 8 729 402 19 TRANSISTOR XN6501 Q13 8 729 904 87 TRANSISTOR 2SB1197K R Q14 8 729 027 60 TRANSISTOR DTC144TKA T146 Q15 8 729 216 22 TRANSISTOR 2SA1162 G S79V Q16 8 729 901 73 TRANSISTOR 2SC2412K S79V Q17 8 729 1...

Страница 16: ... 1 216 097 00 METAL CHIP 100K 5 1 10W R71 1 216 097 00 METAL CHIP 100K 5 1 10W R72 1 216 097 00 METAL CHIP 100K 5 1 10W R73 1 216 097 00 METAL CHIP 100K 5 1 10W R74 1 216 097 00 METAL CHIP 100K 5 1 10W R75 1 216 097 00 METAL CHIP 100K 5 1 10W R76 1 216 097 00 METAL CHIP 100K 5 1 10W R77 1 216 097 00 METAL CHIP 100K 5 1 10W R78 1 216 097 00 METAL CHIP 100K 5 1 10W R79 1 216 097 00 METAL CHIP 100K 5...

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