Adcom-GTP740-pre-sm维修电路原理图.pdf
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1、details you can hearSERVICE MANUALDTS/AC3 TUNER PRE-AMPLIFIERGTP-740TABLE OF CONTENTSAlignment Procedures . . . . . . . . . . . . . . . . . . .2-3Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22IC Block Diagram . . . . . . . . . . . . . . . . . . . . .23-36Wiring Diagram . . .
2、. . . . . . . . . . . . . . . . . . .37-38PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . .39-48Schematic Diagram . . . . . . . . . . . . . . . . . . .49-68Technical Specification . . . . . . . . . . . . . . . . .69-7310 TIMBER LANEMARLBORDN.J. 07746, USAPHONE: (732) 683-2356FAX: (732) 68
3、3-2358WEB: http:/RadioFans.CN 收音机爱 好者资料库2ALIGNMENT PROCEDURESGTP-740FM SECTIONAF Modulation: 1 kHz, 75kHz Deviation, MONO ModeStore Frequency: 98 MHz, 87.5 MHz, 108 MHz, 90 MHz, 106 MHzRF Level:75-ohm Impedance, Open CircuitOSCILLATION TUNING VOLTAGEConnect DVM between M211 & GND.For A16 Front-end M
4、odule:Tune to 87.5 MHz, adjust FE4 (osc coil) to read 3 0.5 V.Tune to 108 MHz, adjust FE4 (osc coil) to read 20.5 0.5 V.For G55 or G58 Front-end Module:Tune to 87.5 MHz, adjust FE4 (osc coil) to read 1.6 0.5 V.Tune to 108 MHz, adjust FE4 (osc coil) to read 8.0 0.5 V.I.F.Connect DVM between M213 & M2
5、14.Apply 10.7 MHz, 90 dBm via 1 kW resistor to M212.Adjust L208 for 0 50mV reading on DVM.Adjust L209 for minimum distortion (THD).Repeat adjustment until no further improvement.SYNTHESIZER I.F. TRACKINGMaintain connection of DVM across M213 & M214.Disconnect 10.7 MHz tap to M212.Apply 98 MHz, 60 dB
6、m to antenna input.Tune to 98 MHz.Adjust C212 FOR 0 20mV reading on DVM.Fine adjust L209 for minimum distortion.Repeat adjustment until no further improvement.R.F.Apply 98 MHz, 7 dBm for AH, or 21 dBm for C, to antenna input.Check THD.If THD 3%, adjust FE1, FE2 & FE3 in the front-end module with non
7、-metallic tool for minimum THD.Check THD at 90 MHz & 106 MHz with 8 dBm input for AH, or 22 dBm for C.FM Stereo: 1 kHz, 67.5 kHz devi., 60 dBmV, Pilot signal 19 kHz, 7.5 kHz devi.STEREO SEPARATION & PILOT SUPPRESSIONSet modulated signal to Left only.Adjust R263 for minimum output at right channel.Se
8、t modulated signal to Right only.Adjust R263 for minimum output at left channel.Repeat until readings are the same.Turn off modulating signal, leaving the pilot tone.Adjust L211 & L212 for minimum outputs on right and left channels respectively.RadioFans.CN 收音机爱 好者资料库3ALIGNMENT PROCEDURESGTP-740AM S
9、ECTIONAF Modulation: 400 Hz, 30%.For AH version, store frequencies 603, 999, 1404 kHz.For C & B versions, store frequencies 600, 1000, 1400 kHz.Connect 22 pF ceramic to capacitor between signal generator and antenna terminal.OSCILLATION TUNING VOLTAGEConnect DVM between M211 & GND.Tune to 603/600 kH
10、z.Adjust L205 for 1.75 0.05 V reading on DVM.I.F.Apply 999/1000 kHz, set 45 dBm to antenna input.Tune to 999/1000 kHz.Adjust L207 for maximum output.R.F.Apply 603/600 kHz, 45 dBm.tune to 603/600 kHz.Adjust L206 for maximum output.Apply 1404/1400 kHz, 45 dBm.Adjust C220 for maximum output.Repeat unti
11、l no further improvement.RadioFans.CN 收音机爱 好者资料库AC3 ASSYPC BOARD1700AC3 PCB ASSY (A0150C)PCB-A0150C-AC3PCBAC3 PCB (A0150C)1723-038A-0000CAPACITORJ003(G)/CHACC 25V 0.01U 20% RL150E-103M-5-IFC065CC 25V 0.47uF +80/-20% 0150E-474Z-J-BDC007,C036,C039CC 50V 100pF 5% 0805 1.2150F-101J-J-BDC104,C110,C116,C1
12、98CC 50V 0.01U 10% 0805150F-103K-J-BDC001,C002,C005,C006,C008-C012,C015,C016,CC 50V 0.1uF 20% 0805 1.150F-104M-J-BDC018,C021,C046,C060-C062,C111-C113,C115,C117,C120,C121,C154,C155,C156,C160,C168,C170,C175,C177,C197,C199,C200C150CC 50V 15pF 5% 0805 1.2x150F-150J-J-BDC130,C134,C138,C142,C146,C152CC 50
13、V 220pF 10% 0805 1.150F-221K-J-BDC047CC 50V 2200pF 10% 0805 1150F-222K-J-BDC151CC 50V 33pF 5% 0805 1.2x150F-330J-J-BDC048,C063,C064CC 50V 330pF 10% 0805 1.150F-331K-J-BDC129,C133,C137,C141,C145,C149CC 50V 3900PF 10% 0805150F-392K-J-BDC101,C103,C106CC 50V 0.47U 20% RM150F-474M-7-IJC128,C132,C136,C140
14、,C144,C148CC 50V 5600pF 10% 0805150F-562K-J-BDC102CC 50V 82pF 5% 0805 1.2x150F-820J-J-BDC150/U101TRIMCAP 5.2-30P1551-0210-0C108CE 10V 100uF 20% RL 5x11157C-107M-5-IUu050(1)/gndCE 10V 1000U 20% RL 8x16157C-108M-5-O5AC014CE 10V 470uF 20% RL 8x12157C-477M-5-OWC080,C126,C127,C131,C135,C139,C143,C147,CE
15、16V 10uF 20% RL 4x7157D-106M-5-GMC157C013,C019CE 16V 100uF 20% RL 5x11157D-107M-5-IUC022CE 16V 22uF 20% RL 5x5157D-226M-5-IIC107CE 16V 47uF 20% RL 5x11157D-476M-5-IUR094/CE 25V 1000uF 20% RL157E-108M-5-X&C180,C181CE 25V 47uF 20% RL 5x11157E-476M-5-IUC017,C038CE 50V 1uF 20% RL 4x7157F-105M-5-GMC003CT
16、C 0/60 10pF 5% 080515CH-100J-J-BDLCOILL002COIL 10UH 10% BL7.01801-100K-ML100COIL 68UH 20% BL71801-680M-MWAFER/SOCKETJ001A,J002AWAFER 10PIN P2.54 DUAL2101-0831-0U022PLCC SOCKET 44 PIN (4X112101-0841-0J0193 PIN ST. WAFER2102-031S-004J009,J012,J0224P ST.WAFER2102-041S-004J0045P ST.WAFER2102-051S-004J01
17、1,J0206P ST. WAFER2102-061S-004J001WF T8 DE 7PIN COULOMB2102-071S-0044PARTS LISTGTP-740REF NO.DESCRIPTIONPART NO.RadioFans.CN 收音机爱 好者资料库5PARTS LISTGTP-740J010WAFER 8P P2.5 ST.2102-081S-004JACKJ110,J1121P RCA JACK BK AU HQ032-2113-1169-1CRYSTALM103XTAL 12.288MHZ +/-2300-1520-0M150XTAL 46.080MHZ +/-23
18、00-1540-0M111XTAL 18.432MHZ +-30PPM2300-2670-0SCREWSCREW M3X6 BINDING (BLK)2904-3006-3000ICU105,U109IC UPC4560C-DUAL OP. AMP3130-2010-0U090,U111,U112,U113IC AD7123130-3830-0U013,U107IC 74HC04 HEX INVERTERS3130-5840-0Q111IC M51943A SYSTEM RESET3130-5860-0U021IC MC68HC11A1 8-BIT3130-6220-0U104IC MC145
19、77 VIDEO OP AMP3130-6230-0U019IC 74HC393 DUAL 4-BIT3130-6260-0U050IC PD4606AAC3 RF3130-6270-0U010IC CS4226 20 BITS AD &3130-6280-0U051IC CY7C188 32KX9 STATIC3130-6320-0U101IC MAX903 HS VOLT.3130-6340-0U022IC PSD312 FIELD PGM UCOM3130-7890-0U012IC SN74HC04 (T.I.)3130-8720-0RESISTORC020,R065,R067,R078
20、,R084,R086,R119,R125RMG 1/10W 0R 5% 08054720-000J-JR166,R179RMG 1/10W 1R 5% 08054720-010J-JR118,R127RMG 1/10W 100R 5% 08054720-101J-JR001,R008,R015,R022,R029,R036,R068,R089,RMG 1/10W 1K 5% 08054720-102J-JR100,R105,R110,R114,R128,R130,R138,R155,R174,R175,R178,R183,R184R000,R054,R059,R101,R102,R111,R1
21、12,R113,RMG 1/10W 10K 5% 08054720-103J-JR116,R123,R139,R141,R142,R143,R148,R153,R156,R177,R181,R193,R194,R195,R196,R197C004RMG 1/10W 100K 1% 08054720-104A-JR007,R014,R021,R028,R035,R042,R172,R200RMG 1/10W 100K 5% 08054720-104J-JR151RMG 1/10W 1M 5% 08054720-105J-JR180RMG 1/10W 120R 5% 08054720-121J-J
22、R004,R011,R018,R025,R032,R039RMG 1/10W 1.2K 5% 08054720-122J-JR003,R010,R017,R024,R031,R038,R122RMG 1/10W 12K 5% 08054720-123J-JR107RMG 1/10W 150R 5% 08054720-151J-JR088,R171RMG 1/10W 1.5K 5% 08054720-152J-JR103,R115,R117RMG 1/10W 220R 5% 08054720-221J-J/C199,R043-R048,R108,R124,R140,R182,R198RMG 1/
23、10W 2.2K 5% 08054720-222J-JR049,R150RMG 1/10W 22K 5% 08054720-223J-JR120,R121,R199RMG 1/10W 220K 5% 08054720-224J-JR187,R189RMG 1/10W 24K 5% 08054720-243J-JREF NO.DESCRIPTIONPART NO.RadioFans.CN 收音机爱 好者资料库6PARTS LISTGTP-740R109RMG 1/10W 330R 5% 08054720-331J-JR002,R009,R016,R023,R030,R037RMG 1/10W 3
24、.9K 5% 08054720-392J-JR055RMG 1/10W 47R 5% 08054720-470J-JR005,R006,R012,R013,R019,R020,R026,R027,RMG 1/10W 470R 5% 08054720-471J-JR033,R034,R040,R041,R079,R173,R191R051,R090,R093,R094,R106,R190RMG 1/10W 4.7K 5% 08054720-472J-JR050,R060,R063,R095,R126,R131,R132,R145,R192RMG 1/10W 47K 5% 08054720-473
25、J-JR071-R077RMG 1/10W 5.1K 5% 08054720-512J-JR176RMG 1/10W 68R 5% 08054720-680J-JR188RMG 1/10W 6.8K 5% 08054720-682J-JR144RMG 1/10W 68K 5% 08054720-683J-JR061,R064RMG 1/10W 75R 5% 08054720-750J-JR092,R129RMG 1/10W 7.5K 5% 08054720-752J-JR104RMG 1/10W 82R 5% 08054720-820J-JDIODEQ110/Q109DIODE IN4001
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