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Adcom GTP-506 Service Manual
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Adcom GTP-506 Service Manual

Adcom GTP-506 Service Manual

Stereo tuner pre-amplifier
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SERVICE MANUAL
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STEREO TUNER PRE-AMPLIFIER
GTP-506

TABLE OF CONTENTS

Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
IC Block Diagram . . . . . . . . . . . . . . . . . . . . .19-22
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . .23-24
PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . .25-34
Schematic Diagram . . . . . . . . . . . . . . . . . . .35-50
Technical Specification . . . . . . . . . . . . . . . . .51-52
®
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-506

  • Page 1: Table Of Contents

    STEREO TUNER PRE-AMPLIFIER GTP-506 TABLE OF CONTENTS Adjustment ......2-3 Parts List ......4-18 IC Block Diagram .

  • Page 2: Adjustment

    ADJUSTMENT GTP-506 Preparation 2. OUTPUTS 1. INPUT - Connect the non-inductive type resistor of 8 ohms - FM mono: 1kHz, 75kHz devi., 60dB/µV to all speaker terminals otherwise noted. - FM stereo: 1kHz, 67.5kHz devi., 60dB/µV Pilot signal 19kHz 7.5kHz devi.
  • Page 3 ADJUSTMENT GTP-506 3. FM MEASUREMENT ANTENNA ANTENNA Fig. 1 TERMINAL TERMINAL DISTORTION UNIT SINGAL ANALYZER GENERATOR TP-141 VOLTMETER MILLIVOLT METER OSCILLOSCOPE ANTENNA OUTPUT TERMINAL TERMINAL Fig. 2 DISTORTION UNIT STEREO SIGNAL ANALYZER GENERATOR GENERATOR OSCILLOSCOPE VOLTMETER 4. RDS MEASUREMENT ANTENNA TERMINAL Fig.

  • Page 4: Parts List

    PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. IR INPUT 1 ASSEMBLY 1200 IR INPUT 1 ASSEMBLY PCB-A0190C-IR1 METAL MATERIALS 1201 L-BRACKET 4152-0451-0 1202 3X6MM B-TITE (BLK.ZN) 2954-3006-3000 1203 SCREW M3X10 (BLK) 2904-3010-3000 1204 M3 NUT 2640-3022-0540 1206 ME 2*8 4.0MM BK/RH JHC023-00...
  • Page 5 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. WAFER J503A WAFER 8P P2.5 ST. 2102-081S-004 JACKS M520-M524 PHONE JACK D3.5 BK JY-3537-01-140 2113-1179-0 METAL MATERIALS M525,M526 BRACKET, GROUNDING 4132-6221-0 RESISTORS R508,R513,R521 RCF 1/4W 150R 5% AT 4705-151J-2 R524,R525 RCF 1/4W 150R 5% AT...
  • Page 6 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. R337 RMG 1/10W 6.8K 1% 0805 4720-682A-J R338-R353 RMG 1/10W 1.2K 1% 0805 4720-122A-J R354 RMG 1/10W 3.3K 1% 0805 4720-332A-J R355,R356 RMG 1/10W 6.2K 1% 0805 4720-622A-J R357,R358 RMG 1/10W 3.3K 1% 0805...
  • Page 7 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. RELAYS M225,M226 RELAY V23105-A5303-A201 SIEMENS 4500-0920-0 TRANSISTORS Q209 TR KTC3875Y 4853-875Y-3 Q210 TR KTA1504Y 4851-504Y-3 Q214,Q215 TR 2SC2878 (A,B) RL 4860-0770-5 Q218,Q219 TR 2SD1012F/G HFE 160-560 4851-012F-5 Q310,Q313,Q314 TR FET J112 4860-8770-0...
  • Page 8 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. HOUSING WIRE J602A CONN.ASSY 2P P2.5 L60 AWG26 7702-1060-2004 SWITCH M502 SWITCH, PUSH 2P2T UNLOCK SPPJ2-EN-PLB 5200-3539-0 KEY BOARD ASSEMBLY KEY BOARD ASSEMBLY PCB-A0190C-KEY KEY BOARD ASSEMBLY PCB-A0191C-KEY MATEL MATERIAL 1101 HOLDER LED...
  • Page 9 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. RESISTORS R601,R602 RMG 1/10W 4.7K 5% 0805 4720-472J-J R603 RMG 1/10W 2.2K 5% 0805 4720-222J-J R604 RMG 1/10W 1.2K 5% 0805 4720-122J-J R605 RMG 1/10W 820R 5% 0805 4720-821J-J R606 RMG 1/10W 470R 5% 0805...
  • Page 10 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. U601 IC M35500AFP VFD CONTROLLER MITSUBISHI 3131-6760-0 U605 IC 4094 8-BIT SIPO SR 3S 3130-3600-0 MAIN ASSEMBLY MAIN ASSEMBLY PCB-A0190C-MAIN MAIN ASSEMBLY PCB-A0191C-MAIN PCB BOARD 1009 PCB MAIN A0190C 1724-680A-0003 METAL MATERIALS...
  • Page 11 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. DIODES / RECTIFIER D1001-D1003 RLS-73 DIODE 4840-1080-3 D101-D105 BRIDGE RECTIFIER RB152 100V 1.5A 4840-0490-0 D108 DZ 1/2W 12V 5% TEMIC AT 4837-12V6-2 D109 DZ 1/2W +-5% 3.3V TEMIC AT 4837-3V36-2 D110 DZ 1/2W 12V 5% TEMIC AT...
  • Page 12 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. Q201-Q208 TR KTC3875Y 4853-875Y-3 q209a TR 2SC2878 (A,B) RL 4860-0770-5 Q212 TR KTC3875Y 4853-875Y-3 Q213 TR KTA1504Y 4851-504Y-3 q213a TR 2SC2878 (A,B) RL 4860-0770-5 Q216,Q217 TR 2SC2878 (A,B) RL 4860-0770-5 Q301-Q306 TR KTC3875Y...
  • Page 13 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. R509,R510 RMG 1/10W 1K 5% 0805 4720-102J-J R511 RMG 1/10W 4.7K 5% 0805 4720-472J-J R512 RMG 1/10W 1.5K 5% 0805 4720-152J-J R514,R515 RMG 1/10W 1K 5% 0805 4720-102J-J R516 RCF 1/4W 4.7R 5% RL...
  • Page 14 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. PCB BOARD 1602 POWER SWITCH PCB A0191C/A0181C 1725-110A-0000 POWER ASSEMBLY POWER ASSEMBLY PCB-A0190C-PWR POWER ASSEMBLY PCB-A0191C-PWR PCB BOARD 1501 PCB KEYBOARD/RM1/TUNER/ MISC 1724-670A-0002 CAPACITOR C131 CAP400V 4700P DE7150F472MVA1KC 8910-0049-0 METAL MATERIALS J805,J810,J812...
  • Page 15 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. C981 CC 50V 0.022µF 10% 0805 150F-223K-J-BD C982 CTC 0/30 100pF 5% 0805 1.2X2.5 15CG-101J-J-BD C991 CC 50V 1000pF 10% 0805 1.2X2.0 150F-102K-J-BD DIODES D901,D902 DZ 1/2W 5.0-5.2V AT 4837-4C20-2 D980 DIODE 1N4148 ATS...
  • Page 16 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. R911 RMG 1/10W 100R 5% 0805 4720-101J-J R912 RMG 1/10W 22R 5% 0805 4720-220J-J R913 RMG 1/10W 33R 5% 0805 4720-330J-J R915 RMG 1/10W 10K 5% 0805 4720-103J-J R916 RMG 1/10W 1K 5% 0805...
  • Page 17 3005-0360-1 MODEL LABEL SET,BLANK APPLE SERIES 3005-0512-0 CASING MATERIALS 0101 REAR PANEL 1403-5211-0 0102 TOP COVER 502/506 1402-3572-0 0103 BOTTOM CHASSIS GTP-506 CE A0191C 1403-5202-0 0104 FRONT BRACKET,CE 1403-5231-0 0105 FRONT PANEL, 506CE 1403-5222-0 0106 METAL WASHER M3X0.4X8 BZ 2600-3004-0803...
  • Page 18 PARTS LIST GTP-506 REF NO. DESCRIPTION PART NO. 0158 CONN.ASSY 6P P=2.5 L=200MM (SH) 7012-5350-0 0159 CONN.ASSY 16P P=2.5 L=100MM 7012-5280-0 0160 CONN.ASSY 16P P=2.5 7012-5280-0 0161,0162 CONN.ASSY 4P P=2.5 L=100MM (SH) 7012-5340-0 0164 SHRINKAGE TUBE ID=5 UL/CSA 1660-0620-0 0164 3X6MM B-TITE (BLK.ZN)

  • Page 19: Ic Block Diagram

    IC BLOCK DIAGRAM GTP-506 U301: CS3310 AINL AOUTL MUTE ZCEN Control AGNDL Register AGNDR SDATAI Serial to Parallel SDATAO Register SCLK AOUTR AINR DGND U206-U207, U304-U307, U333: U202-U204, U302-U303: 7AA TC9273F AMPLIFIER 1 AMPLIFIER 2 OUTPUT 27 S1 INVERTING INPUT OUTPUT –...
  • Page 20 IC BLOCK DIAGRAM GTP-506 U101, U105, U109: 7815FA U114: NJM78M56FA INPUT OUTPUT SERIES PASS ELEMENT CURRENT GENERATOR PROTECTION STARTING REFERENCE ERROR VILTAGE AMPLIFIER CIRCUIT THERMAL PROTECTION OUTPUT INPUT U606: EEPROM 24C02 DOUT SENSE AMPS SHIFT REGISTERS WORD ADDRESS COLUMN BUFFERS...
  • Page 21 IC BLOCK DIAGRAM GTP-506 U901: LA1837 3 rd 5 th DECODER ANTI-BIRIDE RF.AMP BUFF MUTE P-DET STEREO Ø AM IF PILOT 304kHz COMP S-METER AM/FM S-METER S-CURVE IF-BUFF TUNING STEREO DRIVE DRIVE AM IF U903: LC7218 REFERENCE PHASE DETECTOR DIVIDER...
  • Page 22 IC BLOCK DIAGRAM GTP-506 U504: LM2901N U116: LB1642 OUT2 14 OUT3 OUT1 13 OUT4 INput logic 12 GND IN1(-) 11 IN4(+) IN1(+) 10 IN4(-) 9 10 IN2(-) 9 IN3(+) IN2(+) 8 IN3(-) U602: UPD78P058 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61...

  • Page 23: Wiring Diagram

    WIRING DIAGRAM GTP-506 REP BOARD IR2 BOARD ROOM2 BOARD ROOM1 BOARD IR1 BOARD MAIN BOARD TUNER1 BOARD TUNER2 BOARD AC OUTLET BOARD POWER BOARD ROOM3 BOARD BLACK BROWN REG BOARD TRANSFORMER VOL BOARD KEY BOARD SWITCH BOARD PHONE BOARD...

  • Page 24: Pcb Layout

    PCB LAYOUT GTP-506 TUNER BOARD IR 1 BOARD IR2 BOARD Bottom View Top View POWER BOARD Top View Bottom View Top View Bottom View POWER SWITCH BOARD REG BOARD...
  • Page 25 PCB LAYOUT GTP-506 KEY BOARD Top View Bottom View VOL BOARD REP BOARD Top View Bottom View...
  • Page 26 PCB LAYOUT GTP-506 MAIN BOARD ( Top View)
  • Page 27 PCB LAYOUT GTP-506 MAIN BOARD ( Bottom View)
  • Page 28 PCB LAYOUT GTP-506 ROOM1 BOARD ROOM23 BOARD Top View Bottom View PHONE BOARD (UL Only) Top View Bottom View AC OUTLET BOARD SWITCH BOARD (UL Only) Top View Bottom View...
  • Page 29 SCHEMATIC DIAGRAM GTP-506...
  • Page 30 SCHEMATIC DIAGRAM GTP-506 MAIN CPU...
  • Page 31 SCHEMATIC DIAGRAM GTP-506 MAIN INP...

  • Page 32: Schematic Diagram

    SCHEMATIC DIAGRAM GTP-506 MAIN REP...
  • Page 33 SCHEMATIC DIAGRAM GTP-506...
  • Page 34 SCHEMATIC DIAGRAM GTP-506 ROOM 1...
  • Page 35 SCHEMATIC DIAGRAM GTP-506 ROOM 2...
  • Page 36 SCHEMATIC DIAGRAM GTP-506 TUNER...

  • Page 37: Technical Specification

    TECHNICAL SPECIFICATION GTP-506 GENERAL AUDIO SPECIFICATION Specification Details Units Nom. Lim./Tol. Remark Headphone output at 0.1% Vp-p >9 THD with CD IN 500mV at 1 KHz, (600 ohm load, Audio LPF) Headphone Freq. Response +/- 0.8 CD IN 500mV at 1 KHz for ref.
  • Page 38 TECHNICAL SPECIFICATION GTP-506 ≤ 3 Capture ratio (40dBµ) ≥ 48 10. AM Suppression 98MHz @ 60dBµ 100% mod FM, 30% mod AM ≥ 60 11. Pilot suppression 98 MHz ≥ 60 98 MHz 12. Frequency response In between 20Hz & 15KHz dB 0 ±...