Rotel RX-975 Technical Manual
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Rotel RX-975 Technical Manual

Am/fm stereo receiver
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Table of Contents

Specification........................2
Wiring Diagram....................3
Disassembly Diagram............4
Parts List............................6-14
Chassis Layout....................15
Adjustment.........................16-17
PCB Assembly....................18-20
Schematic Diagram..............21-26
THE ROTEL CO., LTD.
SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,
TOKYO 150-0045, JAPAN
ROTEL
Quality uncompromised
AM/FM STEREO RECEIVER
RX-975
Serial No.
Beginning
R
Y-319A-99092C/R-R

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  • Page 1: Table Of Contents

    AM/FM STEREO RECEIVER RX-975 Manual Table of Contents Specification…………………...2 Wiring Diagram…………….….3 Disassembly Diagram..…...….4 Disassembly Diagram List..….5 Parts List……………………….6-14 Chassis Layout..…………...…15 Adjustment………………….…16-17 PCB Assembly…………….….18-20 Schematic Diagram……….….21-26 THE ROTEL CO., LTD. Serial No. SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU, Beginning TOKYO 150-0045, JAPAN Y-319A-99092C/R-R...

  • Page 2: Specification

    Specification Audio Continuous Amplifier Power: 100 watts/channel (20-20 kHz, <0.05%, 8ohms) Total Harmonic Distortion: <0.05 % at rated power Intermoduration Distortion (60 Hz : 7 kHz): <0.05 % at rated power Frequency Response: Line Level: 10 - 70 kHz, ± 3dB Phono: 20 - 20 kHz, ±...

  • Page 3: Wiring Diagram

    Wiring Diagram...

  • Page 4: Disassembly Diagram

    Disassembly Diagram...

  • Page 5: Disassembly Diagram List

    Disassembly Diagram List PARTS NO. DESCRIPTION PARTS NO. DESCRIPTION 8553000211 WINDOW DISPLAY. ACRYL 3.0t 2168602114 IC KIA7915P REG. 8545000211 KNOB ROTARY, AL A6063S-T5 2168602019 IC KIA7815P REG. 8543000211 KNOB MAIN, AL A6063S-T5 2028316100 TRANSISTOR 2SC4833A-Y 8602000311 FRONT PANEL, AL A6063S-T5 2028016100 TRANSISTOR 2SA1859A-Y 8535000110...

  • Page 6: Parts List

    Parts List PART NO. DESCRIPTION SYMBOL NO. AMP PCB 4002001200 ASSEMBLY 4002001200 Assembled PCB 2008207101 TRANSISTOR 2SA1360(O/Y) QL207,QR207 2008607106 TRANSISTOR 2SC3423(O/Y) QL209,QR209 2028016100 TRANSISTOR 2SA1859A-Y QL212,QR212 2028316100 TRANSISTOR 2SC4883A-Y QL211,QR211 2648601470 COIL INDUCTOR 0.5UH LL201,LR201 3049259573 RES WW 0.25 2W J RL235,RL245-247,RR235,RR245-247 3479347181 CAP E SG 470UF/63V...
  • Page 7 Parts List PART NO. DESCRIPTION SYMBOL NO. 3029682970 RES MF 6K8 1/8W J R250,RL244,RR244 3029683970 RES MF 68K 1/8W J R247 3029751970 RES MF 750 1/8W J RL206,RL207,RR206,RR207 3029820970 RES MF 82 1/8W J 3479310071 CAP E SG 10uF/50V CL210,CL216,CR210,CR216 3479310971 CAP E SG 1uF/50V C218...
  • Page 8 Parts List PART NO. DESCRIPTION SYMBOL NO. 3519103915 CAP C AXIAL 0.01UF/16V J C611,613 3519473935 CAP C AXIAL 0.047UF/50V J C617,618 3519821935 CAP C AXIAL 820PF/50V J C619-622,625,626 4658000110 SW TACT SKHVBED010 S601-604,609-610,612-633 HEAD PHONE PCB 4002001050 ASSEMBLY 4002001050 Assembled PCB 3029471570 RES MF 470 2W J R854-855...
  • Page 9 Parts List PART NO. DESCRIPTION SYMBOL NO. 4628000110 SW PWR SDDLB15700 SPEAKER PCB 4002001040 ASSEMBLY 4002001040 Assembled PCB 3029100570 RES MF 10 2W J R451-452 4408100910 TERMINAL SPK 8P(RBRB,RBRB) 4428502646 CNT PLUG ST JE202A-1 T-2 P3.96 CT452,453 4428503416 CNT PLUG ST GIL-S-3P-S2T2-EF CP802 4428503646 CNT PLUG ST JE202A-1 T-3 P3.96...
  • Page 10 Parts List PART NO. DESCRIPTION SYMBOL NO. 3479347031 CAP E SG 47UF/16V C404,409,411,413 3479347121 CAP E SG 470UF/10V C401,416 3519101935 CAP C AXIAL 100PF/50V J C405-407 3519103915 CAP C AXIAL 0.01UF/16V J C403,C408,410,412 INPUT AUDIO PCB 4002000400 ASSEMBLY 4002000400 Assembled PCB 2168017132 IC LC78211 ANALOG SWITCH U302...
  • Page 11 Parts List PART NO. DESCRIPTION SYMBOL NO. 3029221970 RES MF 220 1/8W J R361,365, 3029332970 RES MF 3K3 1/8W J R356-359 3479310971 CAP E SG 1uF/50V C366 3479347041 CAP E SG 47uF/25V C363-365,367 3479347971 CAP E SG 4.7uF/50V CL/R362 3519101935 CAP C AXIAL 100PF/50V J C368,CL/R350-361 MAIN PCB 4002001100 ASSEMBLY...
  • Page 12 Parts List PART NO. DESCRIPTION SYMBOL NO. 3029393970 RES MF 39K 1/8W J R139,R140 3029471970 RES MF 470 1/8W J R131,R132 3029472970 RES MF 4K7 1/8W J R103,R105,R143,R144 3029474970 RES MF 470K 1/8W J R135,R136 3029562970 RES MF 5K6 1/8W J R147,R148 3029564970 RES MF 560K 1/8W J...
  • Page 13 Parts List PART NO. DESCRIPTION SYMBOL NO. 2208606104 TRANSISTOR KTC3198Y-AT Q701,702 2238006103 TRANSISTOR KRA107M Q704,705,706,709 2238422100 TRANSISTOR DTC323TSTP QL708,QR708 2258599519 DIODE ZENER T-72 UZ5V1 ZD701 3029101970 RES MF 100 1/8W J R716,734,739 3029102970 RES MF 1K 1/8W J R710,717-719, 3029103970 RES MF 10K 1/8W J R707,727,731 3029104970...
  • Page 14 Parts List PART NO. DESCRIPTION SYMBOL NO. 3528180210 CAP C RADIAL 18PF/50V(CH) J C708,709 3679223120 CAP MYLAR 0.022UF/100V J C730 3679332120 CAP MYLAR 0.0033UF/100V J C731 3679393120 CAP MYLAR 0.039UF/100V J C732 HEAT SINK ASSEMBLY 2008622110 TRANSISTOR 2SC4137 FOR BIAS QL210,QR210 2028116108 TRANSISTOR 2SA1386A W/ACC...

  • Page 15: Chassis Layout

    Chassis Layout...

  • Page 16: Adjustment

    24dB ~ ~ ~. (Repeat the above 2)~3) if not OFF in lower than 24 dB) 4) Push RX-975’s TUNE UP and DOWN button “long” at Signal Generator Output Level 26 dB and start Auto Search. Confirm if search stops at FM Frequency 98.1 MHz. (confirm both of High Frequency to 98.1 MHz search, Low Frequency to 98.1 MHz search)
  • Page 17 3) Confirm if ‘TUNED’ turns OFF when decreasing the output level of AM Signal Generator slowly from 84 dB to 80 dB. 4) Push RX-975’s TUNE UP or DOWN button “long” at AM Signal Generator Output Level 84 dB and start Auto Search.
  • Page 18 NOTE...

  • Page 19: Pcb Assembly

    PCB Assembly (1/3) AMP PCB 4002001200...
  • Page 20 PCB Assembly (2/3) FRONT 4002001000...
  • Page 21 PCB Assembly (3/3)
  • Page 22 Schematic Diagram(1/6) AMP PCB 4002001200...

  • Page 23: Schematic Diagram

    Schematic Diagram(2/6) Front PCB 4002001000...
  • Page 24 Schematic Diagram(3/6) 4002001040 4002001030 4002001020 4002001060 4002001010 4002001050...
  • Page 25 Schematic Diagram(4/6) 400200400 400200410 INPUT AUDIO PCB INPUT VIDEO PCB...
  • Page 26 Schematic Diagram(5/6) Main PCB 4002001100...
  • Page 27 Schematic Diagram(6/6) Tuner PCB 4002001300...

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