Sony_ICF-S79_ICF-S79L_ICF-S79V_serv.pdf

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1、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 disco

2、nnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. 2 This section is extracted from instruction manual. SECTION 1 GENERAL 3 4 Note: Follow the disassembly procedure in the numerical order given. REAR CABINET SECTION 2 DISASSEMBLY 2 six screws (BTP 3

3、25) 1 battery case lid 4 rear cabinet 5 antenna lead 5 BATT lead (red) 3 two claws 5 BATT lead (white) FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L887.5 MHz (TV 2 ch)2.3 0.1 V (1.0 0.1 V) Confirm108.0 MHz8.5 0.5 V (12.5 0.5 V) Note: Not use the FM RF signal generator

4、 in this adjustment. ( ): ICF-S79V FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L687.5 MHz (TV 2 ch (59.75 MHz) CT4108.0 MHz ( ): ICF-S79V ICF-S79L only LW FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. CT5153 kHz2.3 0.1 V Confirm279 kHz8.5 0.5 V Note

5、: Not use the AM RF signal generator in this adjustment. ICF-S79L only LW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L5 (LW side)162 kHz CT2243 kHz AM (MW) FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L9531 kHz (530 kHz)2.8 0.1 V Confirm1,602 kHz (1,

6、710 kHz)9.5 0.5 V Note: Not use the AM RF signal generator in this adjustment. ( ): ICF-S79V AM (MW) TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L5 621 kHz (590 kHz) CT31,395 kHz (1,490 kHz) : ICF-S79L ( ): ICF-S79V AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T

7、2455 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 V FM/TV Section Setting: BAND switch:

8、 FM1 or TV ICF-S79V only TV FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L2WEATHER 2 ch1.0 0.1 V ConfirmTV 13 ch10 0.5 V Note: Not use the FM RF signal generator in this adjustment. ICF-S79V only TV TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1WEATHE

9、R 2 ch (162.40 MHz) CT1TV 13 ch (215.75 MHz) ICF-S79V only TV IF ADJUSTMENT Adjust for a maximum reading on level meter. T110.7 MHz AM RF SSG 30% amplitude modulation by 400 Hz signal Output level: as low as possible Put the lead-wire antenna close to the set. + level meter speaker terminal set FM R

10、F SSG 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible + level meter speaker terminal set FM lead wire antenna terminal 0.01F + digital voltmeter MAIN board TP (VT) 6 Adjustment and Connection Location: FM antenna ground (JW17) L8 FM FREQUENCY COVERAGE L9 AM (MW) FREQUE

11、NCY COVERAGE L5CT3 AM (MW) 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 CT2L5 LW TRACKING (ICF-S79L only) MWLWL5

12、IC1 IC2 TP (VT) MAIN BOARD (Component Side) MAIN BOARD (Conductor Side) Note on Printed Wiring Board: : parts extracted from the component side. : indicates side identified with part number. : internal component. : Pattern from the side which enables seeing. 7 8 ICF-S79/S79L/S79V MarkCenter frequenc

13、y red10.70 MHz blue10.67 MHz orange10.73 MHz black10.64 MHz white10.76 MHz HOW TO CHANGE THE CERAMIC FILTERS This model is used two ceramic filters of CF1, CF3. You must use same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must change two

14、pieces together since its supply two pieces in one package as a spare parts. mark CF1 CF3 SECTION 4 DIAGRAMS 4-1.PRINTED WIRING BOARDS Semiconductor Location D1G-1Q1F-1 D2F-1Q2E-4 D3E-2Q3I-6 D4E-4Q4G-7 D5H-2Q5E-6 D6H-7Q6B-7 D7G-6Q7H-6 D8F-7Q9E-5 D9E-2Q10D-6 D10B-2Q11C-2 D11B-2Q12A-2 D12C-7Q13D-7 D13

15、C-7Q14C-7 D14H-7Q15D-2 Q16D-1 IC1F-2Q17A-3 IC2E-7 IC3C-7 IC4C-6 IC5C-6 IC6B-5 Ref. No.LocationRef. No.Location 9 10 ICF-S79/S79L/S79V Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors

16、 are in and 1/4 W or less unless otherwise specified. : internal component. : panel designation. B+ : 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 under no-signal (detune

17、d) 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 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscill

18、oscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. : FM : AM (MW/LW) 4-3.SCHEMATIC DIAGRAM (ICF-S79V) See page 11 for Waveforms and IC Block Diagrams. 11 12 Note on Schematic Diagram: All capacitors are in F unless otherwise

19、noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. : internal component. : panel designation. : B+ Line. : adjustment for repair. Power voltage is dc 4.5 V and fed with regulated dc power supply from

20、 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 M). Voltage variations may be noted due to normal production tolerances. Waveforms are tak

21、en with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. : FM : AM : TV ICF-S79/S79L/S79V 13 Waveforms 1 IC6 (XIN) 2 Vp-p 13.3 s 2 IC6 # # (COM0 COM3) 3 Vp-p 32 ms 3 IC6 # $ (LCD0 LCD13) 3 Vp-p 32 ms 4 D11 ANODE 440

22、 ns 30 Vp-p 5 Q11-1 COLLECTOR 6 Vp-p 360 ns IC Block Diagrams IC1TA7358P (ICF-S79V only) 123456789 RF AMP REGULATORBIAS MIXOSC RF IN BYPASS RF OUT MIX GND MIX OUT OSC OUT OSC VCC 123456789101514131211 FM DISCRIMINATOR AF POWER AMPAM FEFM IF TUNING METER AM IF DET AGC FM FE 23222120242519181716292827

23、2630 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 AFC AM OSC VOL NF FM DISCRI GND GND 14 Pin No.Pin NameI/OFunction 1INIT OUTOInitialize signal output for the destina

24、tion select 2POWERORadio power on/off control signal output “H”: power on 3MUTEOMute on/off control signal output “L”: mute on 4AL LEVELOBeep sound level variable output terminal Not used (open) 5NCONot used (open) 6 to 9KS0 to KS3OKey strobe signal output terminal 10 to 13KR0 to KR3IKey return sign

25、al input terminal 14BAND1OBand select signal output terminal *1 15BAND2O Band select signal output terminal *1 Used for ICF-S79L/S79V only (ICF-S79: not used (open) 16V AMPPower supply terminal for buffer amplifier 17NCONot used (open) 18GNDGround terminal 19EOOPLL error signal output terminal 20VCO

26、LIAM (MW) or LW VCO input terminal 21VCOHIFM, TV or WEATHER VCO input terminal 22VREG1Power supply terminal (connected to the coupling capacitor) 23VDDPower supply terminal (+2.2 V) 24XOUTOSystem clock output terminal (75 kHz) 25XINISystem clock input terminal (75 kHz) 26VREG2Power supply terminal (

27、connected to the coupling capacitor) 27VLCD0 28CAP0 29CAP1 30VLCD2 31 to 34COM0 to COM3OCommon drive signal output to the liquid crystal display (LCD1) 35 to 48LCD0 to LCD13OSegment drive signal output to the liquid crystal display (LCD1) 49LCD14OSegment drive signal output terminal Not used (open)

28、50CEIPower failure detection signal input from the IC5 Normally: “H” 51INTINot used (fixed at “L”) 52BEEPOBeep sound drive signal output terminal 53VDETIPower failure detection signal input from the IC4 Normally: “H” 54PB1IInitialize signal input for the destination select Fixed at “L” 55PB2I Initia

29、lize signal input for the destination select ICF-S79/S79L: initialize mode at “H”, ICF-S79V: fixed at “L” 56PB3I Initialize signal input for the destination select ICF-S79L: initialize mode at “H”, ICF-S79/S79V: fixed at “L” MAIN BOARD IC6 PD17071GB-517-1A7 (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY

30、 CONTROLLER, KEY CONTROL) Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage *1 Band select signal FM (TV L) TV H/ WEATHER AM (MW)LW BAND1 (pin !)“L”“L”“H”“H” BAND2 (pin !)“L”“H”“L”“H” 4-4.IC PIN FUNCTION DESCRIPTION 15 SECTION 5 EXPLODED VIEW Items mar

31、ked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference num- ber in the exploded views are not supplied. Accessories and packing materials are given in the last of the electrical pa

32、rts list. NOTE: -XX and -X mean standardized parts, so they may have some difference from the original one. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts ColorCabinets Color Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark not supplied not su

33、pplied not supplied LCD1 SP1 11 1 2 3 4 6 7 8 9 10 12 13 14 15 1617 18 1X-3374-190-1 CABINET (FRONT) ASSY (S79V) 1X-3374-190-2 CABINET (FRONT) ASSY (S79L) 1X-3374-190-3 CABINET (FRONT) ASSY (S79) 23-016-880-01 PLATE (BUTTON), SHEET (S79V) 23-016-880-11 PLATE (BUTTON), SHEET (S79/S79L) * 33-016-863-0

34、1 CHASSIS * 4A-3679-918-A MAIN BOARD, COMPLETE (S79) * 4A-3679-919-A MAIN BOARD, COMPLETE (S79V) * 4A-3679-921-A MAIN BOARD, COMPLETE (S79L) 63-016-875-01 SHEET (BATTERY) (A) 73-016-869-01 TERMINAL (+), BATTERY 83-016-861-01 CABINET (REAR) 93-016-871-01 TERMINAL (+.) (A), BATTERY 103-016-872-01 TERM

35、INAL (+.) (B), BATTERY 113-016-870-01 TERMINAL (), BATTERY 127-685-152-19 SCREW +BTP 3X25 TYPE2 N-S 133-016-876-01 SHEET (BATTERY) (B) 143-368-852-01 FOOT 153-016-862-01 LID, BATTERY CASE 163-016-867-01 SPRING, SP 173-016-873-01 SPRING, RING 183-016-864-01 KNOB (VOL) SP11-504-918-11 SPEAKER (7.7CM)

36、LCD11-801-854-11 DISPLAY PANEL, LIQUID CRYSTAL 16 SECTION 6 ELECTRICAL PARTS LIST Ref. No.Part No.DescriptionRemark NOTE: Due to standardization, replacements in the parts list may be different from the parts speci- fied in the diagrams or the components used on the set. -XX and -X mean standardized

37、 parts, so they may have some difference from the original one. RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipat

38、ed when order- ing these items. SEMICONDUCTORS In each case, u: , for example: uA. .: A. .uPA. . : PA. . uPB. .: PB. .uPC. . : PC. . uPD. .: PD. . CAPACITORS uF: F COILS uH: H Ref. No.Part No.DescriptionRemark KEY When indicating parts by reference number, please include the board. KEY BOARD (INCLUD

39、ED MAIN BOARD) * S1011-554-303-21 SWITCH, TACTILE (RADIO ON) S1021-554-303-21 SWITCH, TACTILE (PRESET TUNIG/PRESET TIMER 1) S1031-554-303-21 SWITCH, TACTILE (PRESET TUNIG/PRESET TIMER 2) S1041-554-303-21 SWITCH, TACTILE (PRESET TUNIG/PRESET TIMER 3) S1051-554-303-21 SWITCH, TACTILE (PRESET TUNIG/PRE

40、SET TIMER 4) S1061-554-303-21 SWITCH, TACTILE (PRESET TUNIG/PRESET TIMER 5) S1071-554-303-21 SWITCH, TACTILE (BAND) S1081-554-303-21 SWITCH, TACTILE (WEATHER) (S79V) S1091-554-303-21 SWITCH, TACTILE (TIMER SET/ON/OFF) S1101-554-303-21 SWITCH, TACTILE (TUNE/TIMER ADJUST +) S1111-554-303-21 SWITCH, TA

41、CTILE (TUNE/TIMER ADJUST ) S1121-554-303-21 SWITCH, TACTILE (CLOCK) S1131-554-303-21 SWITCH, TACTILE (OFF) * *A-3662-876-A MAIN BOARD, COMPLETE (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 BPF11-236-711-21 FIL

42、TER, BAND PASS (S79/S79L) BPF11-239-813-21 FILTER, BAND PASS (S79V) BPF21-233-521-11 FILTER, BAND PASS (S79V) C11-163-141-00 CERAMIC CHIP0.001uF5%50V (S79V) C21-163-141-00 CERAMIC CHIP0.001uF5%50V (S79V) C31-163-009-11 CERAMIC CHIP0.001uF10%50V (S79V) C41-163-217-11 CERAMIC CHIP1PF0.25PF50V (S79V) C

43、51-163-141-00 CERAMIC CHIP0.001uF5%50V (S79V) C61-163-141-00 CERAMIC CHIP0.001uF5%50V (S79V) C71-163-085-00 CERAMIC CHIP2PF0.25PF50V (S79V) C81-163-231-11 CERAMIC CHIP15PF5%50V (S79V) C91-163-141-00 CERAMIC CHIP0.001uF5%50V (S79V) C101-163-217-11 CERAMIC CHIP1PF0.25PF50V (S79V) C111-163-009-11 CERAM

44、IC CHIP0.001uF10%50V (S79V) C121-163-009-11 CERAMIC CHIP0.001uF10%50V (S79V) C131-124-584-00 ELECT100uF20%10V (S79V) C141-164-232-11 CERAMIC CHIP0.01uF50V (S79V) C151-164-232-11 CERAMIC CHIP0.01uF50V (S79V) C161-164-232-11 CERAMIC CHIP0.01uF50V (S79V) C191-216-295-00 CONDUCTOR, CHIP (2012) C211-163-

45、118-00 CERAMIC CHIP110PF5%50V (S79L) C221-163-133-00 CERAMIC CHIP470PF5%50V (S79L) C231-163-141-00 CERAMIC CHIP0.001uF5%50V C241-163-141-00 CERAMIC CHIP0.001uF5%50V C251-216-295-91 CONDUCTOR, CHIP (2012) C261-104-396-11 ELECT10uF20%16V C271-163-141-00 CERAMIC CHIP0.001uF5%50V (S79V) C271-216-295-00

46、CONDUCTOR, CHIP (2012) (S79/S79L) C281-164-232-11 CERAMIC CHIP0.01uF50V C291-163-085-00 CERAMIC CHIP2PF0.25PF50V C301-163-141-00 CERAMIC CHIP0.001uF5%50V C311-163-125-00 CERAMIC CHIP220PF5%50V C321-163-085-00 CERAMIC CHIP2PF0.25PF50V C331-163-009-11 CERAMIC CHIP0.001uF10%50V MAIN 17 Ref. No.Part No.

47、DescriptionRemarkRef. No.Part No.DescriptionRemark C341-164-232-11 CERAMIC CHIP0.01uF50V C351-163-131-00 CERAMIC CHIP390PF5%50V C361-163-229-11 CERAMIC CHIP12PF5%50V C371-163-128-00 CERAMIC CHIP300PF5%50V (S79L) C381-163-251-11 CERAMIC CHIP100PF5%50V C391-164-232-11 CERAMIC CHIP0.01uF50V C401-164-23

48、2-11 CERAMIC CHIP0.01uF50V C411-164-346-11 CERAMIC CHIP1uF16V C421-164-232-11 CERAMIC CHIP0.01uF50V C431-163-251-11 CERAMIC CHIP100PF5%50V C441-164-232-11 CERAMIC CHIP0.01uF50V C451-126-163-11 ELECT4.7uF20%50V C461-104-396-11 ELECT10uF20%16V C471-163-037-11 CERAMIC CHIP0.022uF10%25V C481-164-346-11

49、CERAMIC CHIP1uF16V C491-163-809-11 CERAMIC CHIP0.047uF10%25V (S79L) C501-123-618-11 ELECT22uF20%6.3V C511-126-925-11 ELECT470uF20%10V C521-164-004-11 CERAMIC CHIP0.1uF10%25V C531-135-091-00 TANTALUM CHIP 1uF20%16V C541-126-925-11 ELECT470uF20%10V C561-104-396-11 ELECT10uF20%16V C571-164-346-11 CERAMIC CHIP1uF16V C581-163-235-11 CERAMIC CHIP22PF5%50V C591-164-346-11 CERAMIC CHIP1uF16V