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Adcom GTP-740 Service Manual
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Adcom GTP-740 Service Manual

Adcom GTP-740 Service Manual

Dts/ac3 tuner pre-amplifier
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SERVICE MANUAL
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DTS/AC3 TUNER PRE-AMPLIFIER
GTP-740

TABLE OF CONTENTS

Alignment Procedures . . . . . . . . . . . . . . . . . . .2-3
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22
IC Block Diagram . . . . . . . . . . . . . . . . . . . . .23-36
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . .37-38
PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . .39-48
Schematic Diagram . . . . . . . . . . . . . . . . . . .49-68
Technical Specification . . . . . . . . . . . . . . . . .69-73
®
10 TIMBER LANE
MARLBORD
N.J. 07746, USA
PHONE: (732) 683-2356
FAX: (732) 683-2358
WEB: http://www.adcom.com

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Summary of Contents for Adcom GTP-740

  • Page 1: Table Of Contents

    DTS/AC3 TUNER PRE-AMPLIFIER GTP-740 TABLE OF CONTENTS Alignment Procedures ....2-3 Parts List ......4-22 IC Block Diagram .

  • Page 2: Alignment Procedures

    ALIGNMENT PROCEDURES GTP-740 FM SECTION AF Modulation: 1 kHz, 75kHz Deviation, MONO Mode Store Frequency: 98 MHz, 87.5 MHz, 108 MHz, 90 MHz, 106 MHz RF Level: 75-ohm Impedance, Open Circuit OSCILLATION TUNING VOLTAGE Connect DVM between M211 & GND.
  • Page 3 ALIGNMENT PROCEDURES GTP-740 AM SECTION AF 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.

  • Page 4: Parts List

    PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. AC3 ASSY PC BOARD 1700 AC3 PCB ASSY (A0150C) PCB-A0150C-AC3 AC3 PCB (A0150C) 1723-038A-0000 CAPACITOR J003(G)/CHA CC 25V 0.01U 20% RL 150E-103M-5-IF C065 CC 25V 0.47uF +80/-20% 0 150E-474Z-J-BD C007,C036,C039 CC 50V 100pF 5% 0805 1.2...
  • Page 5 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. J010 WAFER 8P P2.5 ST. 2102-081S-004 JACK J110,J112 1P RCA JACK BK AU HQ032- 2113-1169-1 CRYSTAL M103 X'TAL 12.288MHZ +/- 2300-1520-0 M150 X'TAL 46.080MHZ +/- 2300-1540-0 M111 X'TAL 18.432MHZ +-30PPM 2300-2670-0 SCREW...
  • Page 6 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. R109 RMG 1/10W 330R 5% 0805 4720-331J-J R002,R009,R016,R023,R030,R037 RMG 1/10W 3.9K 5% 0805 4720-392J-J R055 RMG 1/10W 47R 5% 0805 4720-470J-J R005,R006,R012,R013,R019,R020,R026,R027, RMG 1/10W 470R 5% 0805 4720-471J-J R033,R034,R040,R041,R079,R173,R191 R051,R090,R093,R094,R106,R190 RMG 1/10W 4.7K 5% 0805...
  • Page 7 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. C462,C468,C474 CM 50V 2200PF 5% RL 5X7 153F-222J-5-IM C710 CM 50V 0.022UF 5% RL 153F-223J-5-LQ C461,C467,C475 CM 50V 3900pF 10% RL 6x1 153F-392K-5-KW C733,C734,C736 CE 10V 1000uF 20% RL 157C-108M-5-S5 C488,C491 CE 16V 100uF 20% RL 5x11...
  • Page 8 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. RESISTOR R401,R403,R405,R407,R409,R411,R413,R415, RMF 1/8W 1K 1% AT 4711-102A-2 R417,R419,R422,R428,R429,R431,R432,R434, R435,R437,R438,R711,R716,R723 R423,R441,R442,R445,R451,R457,R459,R460, RMF 1/8W 10K 1% ATS 4711-103A-C R462,R468,R472,R474,R475,R479,R486,R488, R490,R491,R499,R722,R724,R727,R729,R733, R734,R735,R756-R767 R731 RMF 100K 1/8W 1% AT 4711-104A-2 R443,R465,R481,R495 RMF 1/8W 100K 1% ATS...
  • Page 9 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. MISCELLANEOUS J487/J ANTENNA WASHER 4131-7701-0 SOLDER TAG 4132-1061-0 CPU ASSY PC BOARD CPU PCB ASSY (A0150C) PCB-A0150C-CPU DSP PCB (A0150C) 1723-039A-0000 CAPACITOR C060,C159,C161-C166,C169,C171,C172,C178, CC 50V 0.1uF 20% 0805 1. 150F-104M-J-BD C188-C194 C053,C054...
  • Page 10 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. 1801 PCB AUDIO/PSU/JACK 1722-780A-0101 WAFER J491 4P ST.WAFER 2102-041S-004 JACK J490 PHONE JACK 2113-1011-0 S.VIDEO ASSY PC BOARD 1300 S.VIDEO PCB ASSY A0150C PCB-A0150C-SVDO 1301 PCB VIDEO/S-VIDEO/VOL 1722-790A-0102 CAPACITOR C343 CC 25V 0.068uF 10% RL 8x...
  • Page 11 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. R335,R336,R384 RMF 1/8W 100K 1% ATS 4711-104A-C R322 RMF 1/8W 1M 1% ATS 4711-105A-C R326 RMF 1/8W 1.2K 1% ATS 4711-122A-C R319,R331 RMF 1/8W 12K 1% AT 4711-123A-2 R315 RMF 1/8W 180R 1% AT...
  • Page 12 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. VIDEO ASSY PC BOARD 1200 VIDEO PCB ASSY A0150C PCB-A0150C-VDO 1201 PCB VIDEO/S-VIDEO/VOL 1722-790A-0102 CAPACITOR C628 CC 50V 100pF 10% RL 5x3. 150F-101K-5-IF C616,C617 CC 50V 1000pF 10% RL 5x5 150F-102K-5-II C372,C376,C379,C620,C629 CC 50V 0.1uF 10% RL 5x5...
  • Page 13 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. RESISTOR R641 RMF 1/8W 100R 1% AT 4711-101A-2 R638 RMF 1/8W 1K 1% AT 4711-102A-2 R633,R634 RMF 1/8W 10K 1% AT 4711-103A-2 R374,R612,R615,R639,R642,U322/U RMF 1/8W 10K 1% ATS 4711-103A-C R375 RMF 1/8W 100K 1% ATS...
  • Page 14 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. 1401 PCB VIDEO/S-VIDEO/VOL 1722-790A-0102 CAPACITOR C602,C603 CC 50V 0.1uF 10% RL 5x5 150F-104K-5-II C601,C605,C606 CE 16V 10uF 20% RL 4x7 157D-106M-5-GM WAFER J602 3 PIN ST. WAFER 2102-031S-004 J601 WAFER 5 PIN P2.5...
  • Page 15 CN ASSY 3P P2.5 L60 7009-9920-0 J502 CONN. ASSY 12P P2.5 L=70 7712-1070-2004 MISCELLANEOUS 1501 EL LIGHT BLUE (A1 TYPE) 2450-1156-0 1502 LCD DISPLAY GTP-740 2460-1280-0 1501 WSER FIBRA 1103A D3.3 2848-0032-0 1504 HOLDER LED 4132-6601-0 CHSHION D20X2 4152-1061-0 1503...
  • Page 16 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. C245/CHA,C263,C265 CC 50V 0.01uF 10% RL 5x5 150F-103K-5-II C203,C204,C213-C219,C226,C245,J202(1)/GND CC 50V 0.01uF 10% RL 11x 150F-103K-5-UU C210,C244,C264 CC 50V 0.1uF 10% RL 5x5 150F-104K-5-II C211,C222 CC 50V 22pF 10% RL 4x4 150F-220K-5-GG...
  • Page 17 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. U202 IC LA1266 FM/AM TUNER 3130-3390-0 U204 IC LA3401 PLL MPX 3130-3400-0 U201 IC LM7000 DTS SANYO 3130-3430-0 RESISTOR R280 RMF 1/8W 10K 1% ATS 4711-103A-C R278,R279 RMF 1/8W 2.7K 1% AT...
  • Page 18 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. RF COIL L211,L212 19KHZ FILTER COIL 5600-2236-S L207 AMZFT COIL (5565105200) 5600-2246-S L208 FM COIL PRIMARY 5600-2256-S L209 FM COIL SECONDARY 5600-2266-S L206 AM COIL 5564102600 5600-2276-S L205 AM OSC COIL 5564312800...
  • Page 19 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. RESISTOR R3,R4 RCFA 1/8W 20K 5% RL 9 4701-203J-5-09 R1,R2,R11-R14,R17-R19, RMG 1/10W 22K 5% 0805 4720-223J-J RMG 1/10W 330R 5% 0805 4720-331J-J R10,R5,R6,R7,R8,R9 RMG 1/10W 47R 5% 0805 4720-470J-J DIODE DUAL DIODE KDS226 KEC...
  • Page 20 PARTS LIST GTP-740 REF NO. DESCRIPTION PART NO. J851 4P ST.WAFER 2102-041S-004 J829 12P ST.WAFER 2102-121S-004 SCREW 0002 SCREW M3X8 (BLK) 2904-3008-3000 1108 SCREW BH 2.6X6 BLACK 2954-2606-3000 0001 T3X8MM SELF TAPPING 2954-3008-3000 U804,U806,U807 IC 7805 REG 5V 1.5A 3130-2020-3...
  • Page 21 TOP COVER W/O VENT, 1402-3541-0 0102 BOTTOM CHASSIS A0150C 1402-6630-2 0103 REAR PANEL A0151C 1402-6692-1 0101 FRONT PANEL, A0150C 1402-6700-1 0106 TUNER BRACKET GTP-740 1402-6710-0 0105 SUBFASCIA GTP-740 1402-6760-1 0128 AC INLET SOCKET 2113-0300-0 0113 POWER KNOB 2438-8301-0 0114 POWER KNOB HOLDER...
  • Page 22 REF NO. DESCRIPTION PART NO. 0117 POWER KNOB LENS 3714-4906-0 0110 LENS,VOLUME GTP-740 3715-4100-0 0123 REMOTE LENS 3715-4506-0 0108 DISPLAY LENS GTP-740 3715-4700-0 0118 LENS BUTTON ACTUATOR 3715-4800-0 0124 LENS,LEDX8 3715-4900-0 0125 LENS LEDX4 3715-5000-0 0151 HEX STANDOFF M3X30.4 4132-6691-0 0152 HEX STANDOFF M3X53.4...

  • Page 23: Ic Block Diagram

    IC BLOCK DIAGRAM GTP-740 AC3 ASSEMBLY AD1/CDIN AD0/CS SPI/I 2 C SDA/CDOUT VD+ VA+ U010: 74HC393 Voltage CMOUT Control Port Reference Volume DAC#1 AOUT1 Control LRCK Volume DAC#2 AOUT2 SCLK Control SDIN1 Volume DAC#3 AOUT3 SDIN2 Control SDIN3 Volume DAC#4...
  • Page 24 IC BLOCK DIAGRAM GTP-740 AC3 ASSEMBLY PAGE LOGIC U022: PSD312 P3-P0 A16-A18 PROG. A11-A15 PORT LOGIC IN A8-A10 EXP. CSIOPORT A19/CSI A19/CSI PC0- AD8-AD15 ALE/AS ALE/AS PAD A PAD B PORT CS8- 13 P.T. 27 P.T. CS10 RESET RESET ALE/AS...
  • Page 25 IC BLOCK DIAGRAM GTP-740 AC3 ASSEMBLY U021: MC68HC11A MODA/ MODB/ XTAL EXTAL E IRQ XIRQ/V RESET STBY PPE* INTERRUPT MODEL CONTROL LOGIC ROM OR EPROM CLOCK LOGIC (SEE TABLE) TIMER EPROM SYSTEM (SEE TABLE) M68HC11 CPU (SEE TABLE) SERIAL SERIAL...
  • Page 26 IC BLOCK DIAGRAM GTP-740 AUDIO ASSEMBLY U401: TC9163AN L-S1 R-S1 L-S2 R-S2 L-S3 R-S3 R-COM1 L-COM1 R-S4 L-S4 L-S5 R-S5 L-S6 R-S6 L-COM2 R-COM2 L-S7 R-S7 L-S8 R-S8 L-COM3 R-COM3 L-ST DATA SHIFT REGISTER AUDIO ASSEMBLY U402, U411: TC9164AN L-S1...
  • Page 27 IC BLOCK DIAGRAM GTP-740 AUDIO ASSEMBLY V DD V SS U403: TC9176 DATA DATA 20bit SHIFT REGISTER 15 R-OUT 1 L-OUT 1 L-IN 1 A-SW A-SW 14 R-OUT 1 A-SW A-SW A-SW A-SW A-SW A-SW A-SW A-SW A-SW A-SW A-SW...
  • Page 28 IC BLOCK DIAGRAM GTP-740 AUDIO ASSEMBLY U420, U421: 74HC573 CPU ASSEMBLY U017: CY7C109A Top View INPUT BUFFER 512 x 256 x 8 ARRAY TSOP I Top View (not to scale) POWER COLUMN DOWN DECODER CPU ASSEMBLY 16-Bit Bus U018: MC56009/88...
  • Page 29 IC BLOCK DIAGRAM GTP-740 CPU ASSEMBLY U003: 27C512-12 CPU ASSEMBLY U020: MC56007/66 16-Bit Bus 24-Bit Bus General Serial Serial External Purpose Audio Host Memory Program X Data Y Data Input/ Interface Interface Interface Memory* Memory* Memory* Output (SAI) (SHI) (EMI)
  • Page 30 IC BLOCK DIAGRAM GTP-740 CPU ASSEMBLY CPU ASSEMBLY U024: 74HC74 U023, U027, U028: TC74HC00AP S-VIDEO ASSEMBLY U307-U309: BA7602 IN2a 16 IN1a CTLa 15 GND OUTa 14 IN2b 13 V OUTb 12 CTLb OUTc 11 IN1b CTLc 10 GND IN2c 9 IN1c...
  • Page 31 IC BLOCK DIAGRAM GTP-740 S-VIDEO ASSEMBLY U305: PCA8515P/009 CONTROL V DD ADDERSS DISPLAY EXTERNAL/INTERNAL CHARACTER SIZE WRITE ADDERSS REGISTER BUFFER CHARACTER DATA SWITCHING REGISTER/ COUNTER V SS SELECTOR BUFFER CONTROL RESET I 2 C SLAVE SCL/SCLK HORIZONTAL PORT P04/ACM (VOB2)
  • Page 32 IC BLOCK DIAGRAM GTP-740 VIDEO ASSEMBLY U322: NJM2220S Comparator Switch SYNC DET M.M Time SYNC SYNC SSG SYNC SYNC DET Constant Input Output Input Output Smoothing 5V~10V Judgement Control VOL ASSEMBLY VIDEO ASSEMBLY U321: BA7046F U601: LB1642 Phase comparator Horizontal signal PHASE H.OSC...
  • Page 33 IC BLOCK DIAGRAM GTP-740 KEYBOARD ASSEMBLY U501: MSM9006-02 SEG1 48 DATA I/O SEG2 47 INT SEG3 46 RESET SEG4 45 TEST SEG5 44 V SS SEG6 43 OSC SEG7 42 V DD SEG8 41 SEG41/LED SEG9 40 SEG40/P01 SEG10 39 SEG39/P02...
  • Page 34 IC BLOCK DIAGRAM GTP-740 KEYBOARD ASSEMBLY U508: NJM78L05A TUNER ASSEMBLY U205: NJM78L05A TUNER ASSEMBLY U202: LA1266 Post FM - IF Q. D Butter Butter AM - IF Narrow S-Meter S-Meter Butter Driver TUNER ASSEMBLY U204: LA3401 Pilot sync detector Pilot sync...
  • Page 35 IC BLOCK DIAGRAM GTP-740 DTS ASSEMBLY U1: MC56009/88 MODC/NMI MODB/IRQB MODA/IRQA RESET GNDD MISO/SDA GNDS PCAP GNDP PINIT GNDD GNDQ GPIO3 GPIO2 EXTAL GPIO1 SCK/SCL GPIO0 MA17/MCS1/MRAS MA16/MCS2/MCAS GNDA Host Processor µC (8-bit) MOSI/HA0 MISO/SDA SAI TX SAI RX IEC1937...
  • Page 36 IC BLOCK DIAGRAM GTP-740 DTS ASSEMBLY U3: KM68257C-15 256X1024 28 VCC 21 A10 A0-A14 DECODER MEMORY ARRAY 27 WE 20 CE 26 A13 19 I/O7 25 A8 18 I/O6 24 A9 17 I/O5 23 A11 16 I/O4 22 OE 15 I/O3...

  • Page 37: Wiring Diagram

    WIRING DIAGRAM GTP-740 S-VIDEO BOARD VIDEO BOARD AC OUTLET BOARD CPU BOARD AC3 BOARD AUDIO BOARD POWER BOARD TUNER BOARD PHONE BOARD KEYBOARD VOL BOARD...

  • Page 38: Pcb Layout

    PCB LAYOUT GTP-740 AUDIO BOARD POWER BOARD...
  • Page 39 PCB LAYOUT GTP-740 AC3 BOARD - Top View AC3 BOARD - Bottom View...
  • Page 40 PCB LAYOUT GTP-740 KEYBOARD - Top View KEYBOARD - Bottom View...
  • Page 41 PCB LAYOUT GTP-740 S-VIDEO BOARD VOL BOARD PHONE BOARD VIDEO BOARD...
  • Page 42 PCB LAYOUT GTP-740 TUNER BOARD CPU BOARD - Top View CPU BOARD - Bottom View AC OUTLET BOARD...

  • Page 43: Schematic Diagram

    SCHEMATIC DIAGRAM GTP-740 AC3 & DSP...
  • Page 44 SCHEMATIC DIAGRAM GTP-740 TUNER (Front End & Data Ports)
  • Page 45 SCHEMATIC DIAGRAM GTP-740 S_VIDEO INPUTS SELECTOR & OSD CONTROLLER...
  • Page 46 SCHEMATIC DIAGRAM GTP-740 KEYBOARD...
  • Page 47 SCHEMATIC DIAGRAM GTP-740 COMPOSITE VIDEO & REMOTE...
  • Page 48 SCHEMATIC DIAGRAM GTP-740 AUDIO I/O...
  • Page 49 SCHEMATIC DIAGRAM GTP-740 CHANNELS OUTPUT...
  • Page 50 SCHEMATIC DIAGRAM GTP-740 AUDIO BOARD VOLUME MOTOR PORT...
  • Page 51 SCHEMATIC DIAGRAM GTP-740 POWER SUPPLY...
  • Page 52 SCHEMATIC DIAGRAM GTP-740 TUNER (Audio Outputs) S-VIDEO BALL SYSTEM ON/OFF SELECTOR...

  • Page 53: Technical Specification

    TECHNICAL SPECIFICATION GTP-740 FM SPECIFICATION Frequency Range: 87.5 to 108.1±0.02MHz Specification Details Freq. Unit Limit(AH) Limit(C) ≤17 ≤27 Input sensitivity (1KHz, 3% THD) 97.7MHz dBµ (U: mond. 75KHz) (C: mond. 40KHz) ≤43 ≤437 50dB quieting Stereo 97.7MHz dBµ ≤20 ≤28 (mod.
  • Page 54 TECHNICAL SPECIFICATION GTP-740 ≥35 IF Rejection 450KHz ≥20 Selectivity 1050KHz (+/-10KHz avg2) Search tuning Sensitivity 1000kHz dBµ 20±7 GENERAL AUDIO SPECIFICATION - 1 CD (SONY YEDS7) Surround Mode: FL /FR_2channel stereo Input source: Digital input Specification Details Track Unit Limit Output level (Vol max.)
  • Page 55 TECHNICAL SPECIFICATION GTP-740 ≥65 Signal to noise ratio (B, 6 for output) CCIR/ARM 100mV and play A27 config 1 and 2.) 200Hz Notch (FL, FR, C, SL, SR) and 400Hz HPF. ≥70 PAUSE Audio LPF ≥70 A-Wtd ≥75 Channel separation A, 31 (997Hz) (insert 20KHz L.P.F.)
  • Page 56 TECHNICAL SPECIFICATION GTP-740 Channel difference (L-ch & R-ch) 1kHz 0±0.65 Frequency response input=2V, output=2Vrms, 1kHz ref. 20Hz 0±0.8 20kHz 0±0.8 Headphone THD ≤0.08 input=2Vrms, output=4Vrms 1kHz w/20KHz LPF Headphone level output level (L-ch & R-ch) 1kHz 2.0±0.2 max. vol input=150mV...
  • Page 57 TECHNICAL SPECIFICATION GTP-740 Input mode: L=R input level=2V 300Hz 0±0.8 20kHz 0±0.8 Input mode: L=-R input level=2V 30Hz SL, SR -1.0±1.0 Input voltage 2.0V ≤0.08 w/ 80kHz LPF 1kHz S/N ratio Input level=2.0V, (A-WTD w/1k termination) ≥70 Input mode: L, R...

  • Page 58: Phone: (732)

    ® 10 TIMBER LANE MARLBORD N.J. 07746, USA PHONE: (732) 683-2356 FAX: (732) 683-2358 WEB: http://www.adcom.com Oct. 12, 2002...