Rotel RX-975 Service manual

Quality uncompromised

ROTEL

R

Technical

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

AM/FM STEREO RECEIVER

RX-975

THE ROTEL CO., LTD.

SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,
TOKYO 150-0045, JAPAN

Serial No.
Beginning

Y-319A-99092C/R-R

Specification

Audio

Continuous Amplifier Power: 100 watts/channel
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

Signal to Noise Ratio (IHF”A” weighted): 92 dB
Input Overload: Line Inputs: 5 V

Preamplifier Output Voltage: 1.1 V
Input Sensitivity / I mpedance: Line Level: 200 mV / 47kohms

Tone Controls ( Bass / Treble): ± 8 dB at 100Hz /10 kHz

Video

Frequency Response: 3 Hz-10 MHz, ± 3dB
Signal to Noise Ratio: 92 dB
Input Impedance: 75kohms
Output Level: 1 volt

FM Tuner

(20-20 kHz, <0.05%, 8ohms)

Phono: 20 - 20 kHz, ± 1.5dB

Phono input: >120 mV

Phono: 3.1 mV / 47 kohms

Usable Sensitivity: 14.2 dBf
50 dB Quieting Sensitivity: 20.2 dBf (mono)

45.3dBf (stereo)

Signal to Noise Ratio (at 65 dBf): 70 dBf (mono)

65 dBf (stereo)

Harmonic Distortion (at 65 dBf): 0.3% (mono)

0.5% (stereo)
Frequency Response: 30 Hz- 14kHz, ± 1.5dB
Capture Ratio: 2.0 dB
Alternative Channel Selectivity 47 dB (± 400kHz)
Spurious Response Ratio: 80 dB
Image Response Ratio: 65 dB
IF Response Ratio: 80 dB
AM Suppression Ratio: 52 dB
Stereo Separation (100Hz/ 1 kHz/ 10 kHz): 40 dB/ 45 dB/ 35 dB
Output Level: 550 mV
Antenna Input: 75 ohms

unbalanced

AM Tuner

Sensitivity: 500 uV/m
Selectivity: 25 dB
Image Response Ratio: 35 dB
Signal to Noise Ratio: 40 dB
Output Level: 160 mV
Antenna Input: Loop Antenna

General

Power Consumption: 350 watts
Power Requirements (AC): 115Volts, 60 Hz (USA version)
230 Volts, 50 Hz (European version)
Weight: 11.5 Kg / 25.4 lb.
Dimensions (W x H x D): 450 x 158 x 400 mm
173/4” x 61/4” x 153/4”

2

Wiring Diagram

3

Disassembly Diagram

4

Disassembly Diagram List

NO. PARTS NO. DESCRIPTION NO. PARTS NO. DESCRIPTION

1 8553000211 WINDOW DISPLAY. ACRYL 3.0t 52 2168602114 IC KIA7915P REG.
2 8545000211 KNOB ROTARY, AL A6063S-T5 53 2168602019 IC KIA7815P REG.
3 8543000211 KNOB MAIN, AL A6063S-T5
4

8602000311 FRONT PANEL, AL A6063S-T5
5 8535000110 FILTER, ACRYL 1.0t 56 2028416122
6 8545000311 BEZEL RING, ABS BLACK
7 8521000110 FRONT BODY, ABS BLACK 58 2008622110 TRANSISTOR 2SC4137 FOR BIAS
8 8545000110 POWER BUTTON, ABS BLACK
9 8523000120 SIDE CAP(RIGHT), ABS BLACK

10 8523000110 SIDE CAP(LEFT), ABS BLACK
11 4628000110 POWER SWITCH, TV-5
12 4438000210 PHONE JACK 9P(GOLD)
13 6505000210 PHONE BRAKET 0.6t
14 4658000110 TACT SWITCH
15 2408000180 REMOCON SENSOR CRV1M352-B
16 6515000110 HOLDER FIP, ABS BLACK
17 2328000304 FIP SVR-12MM18(35S/12G)
18 3218000210 VR ROTARY, ENCODER
19 3218000110 VR MAIN, ENCODER
20 7502000210 POWER HEAT SINK, AL A6063S-T5
21 6505000110 BRAKET HEAT SINK, SECC1.0t
22 436102101535 ASS'Y POSISTOR
23 6133100110 FOOT, ABS BLACK
24 6715000110 BUMPON
25 6121600110 MAIN CHASSIS, SECC1.2t
26 6515000210 SPACER PCB, ABS BLACK
27 6715000410 SPONGE, 80x20x9t
28 6528000210 CLAMP WIRE
29 6122000110 TOP COVER, VCM 0.95t
30 6715000210 SPONGE, 260X20X1t
31 6715000510 SPONGE, 90x40x12t
32

2828000067

33 6122600110 FRAME T/F, SECC 1.0t
34 7505000210 REG TR HEAT SINK(24X30), AL
35 4438101120 RCA JACK 4P(WR,WR)
36 4438300110 JACK RCA(MINI)
37

4448000110

38

2828000037

39 4408100910 SPEAKER TERMINAL 8P(RBRB,RBRB)
40 4438100720 RCA JACK 1P(Y), VIDEO
41 4438100520 RCA JACK 3P(Y), VIDEO
42 4438100320 RCA JACK 6P(WWW,RRR)
43 4438100120 RCA JACK 2P(W,R)
44 4438100220 RCA JACK 4P(WW,RR)
45 4408000310
46 6102000211
47 4448000310
48 4308000410
49 4408200110 TERMINAL G.N.D
50 4428000110 JUMPER PLUG
51 7505000110 REG TR HEAT SINK(15X30), AL

POWER TRANS(022 T-1068N01)

AC OUTLET

STANDBY TRANS(120V/60Hz)

ANT TERMINAL(SCREW)

BACK CHASSIS, SECC1.0t

AC INNET

INNET CORD AC POWER

54
55

57

2028316100
2028016100

2028116108

TRANSISTOR 2SC4833A-Y

TRANSISTOR 2SA1859A-Y
TRANSISTOR 2SC3519A W/ACC
TRANSISTOR 2SA1386A W/ACC

5

Parts List

Q,Q,Q,Q,Q,Q

,,,,,

6

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 CL208,CL209,CR208,CR209
436502102167 CTJ 0210 201,210 DL #18 P7.92 CN203
436502252166 CTJ 0225 201,210 DL #18 P3.96 CN202
436502302166 CTJ 0230 201,210 DL #18 P3.96 CN201
4428502526 CNT PLUG ST MO 5267-02 CP204,CP602
4428505526 CNT PLUG ST MO 5267-05 CP201
7505000110 H/SINK REG TR 15X30
2058322101 DIODE 1N4148 D206,DL201,DL202,DR201,DR202
2208206104 TRANSISTOR KTA1268(GR/BL)
2208206105 TRANSISTOR KTA1266Y Q218,QL203,QL204,QR203,QR204
2208606104 TRANSISTOR KTC3198Y-AT Q219,Q220,QL217,QR217
2208606108 TRANSISTOR KTC3200(GR/BL) QL206,QL208,QR206,QR208
2238006104 TRANSISTOR KRC107M Q221
2258128002 DIODE 1N4004 DL203,DL204,DR203,DR204
2258599919 DIODE ZENER T-72 UZ9V1 ZD201
3029100470 RES MF 10 1W J RL243,RR243
3029102970 RES MF 1K 1/8W J R249,RL201,RR201
3029103970 RES MF 10K 1/8W J RL210,RR210

3029104970 RES MF 100K1/8W J R246
3029122970 RES MF 1K2 1/8W J RL223,RR223
3029150970 RES MF 15 1/8W J RL203,RL204,RR203,RR204
3029151970 RES MF 150 1/8W J RL209,RR209
3029152970 RES MF 1K5 1/8W J R252,RL212,RR212
3029154970 RES MF 150K 1/8W J R253

3029222970 RES MF 2K2 1/8W J RL237-240,RR237-240
3029223970 RES MF 22K 1/8W J RL221,RL222,RR221,RR222
3029243970 RES MF 24K 1/8W J RL242,RR242
3029332970 RES MF 3K3 1/8W J R248
3029333970 RES MF 33K 1/8W J
3029339970 RES MF 3R3 1/8W J RL231-234,RR231-234
3029392970 RES MF 3K9 1/8W J RL225,RR225
3029470470 RES MF 47 1W J RL227,RL228,RR227,RR228
3029471970 RES MF 470 1/8W J RL224,RR224
3029472970 RES MF 4K7 1/8W J RL217,RR217

3029561970 RES MF 560 1/8W J
3029680970 RES MF 68 1/8W J RL208,RR208
3029681970 RES MF 680 1/8W J RL205,RL241,RR205,RR241

5

9

RL213-216,RL218-219,RR213-216,RR218­219

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Parts List

,,,,,

7

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
3479310991 CAP E SG 1UF/100V CR212,CR213
3479322031 CAP E SG 22UF/16V CL205,CR205
3479333061 CAP E SG 33UF/35V CL204,CR204
3479347111 CAP E SG 470UF/6.3V C219,CL207,CR207
3479347971 CAP E SG 4.7uF/50V CL201,CR201,CL211,CR211
3519033935 CAP C AXIAL 3.3PF/50V J CL206,CR206
3519680935 CAP C AXIAL 68PF/50V J CL202,CR202
3519681935 CAP C AXIAL 680PF/50V J CL203,CR203
3679104250 CAP MYLAR 0.1UF/250V J CL214,CR214

FRONT PCB 4002001000 ASSEMBLY

4002001000 Assembled PCB
2138322102 IC CPU CXP82832-180Q RX975 U601
2328000304 FIP SVR-12MM18(35S/12G) FL601
2408000180 REMOCON SENSOR CRV1M352-B RMC1
3218000110 VR ENCODER EC16B243040F
3218000210 VR ENCODER EC16B242040A
3439210415 CAP BACK-UP 0.1F/5.5V C614
3938124010 RESONATOR CST10.0MTW-TF01 XT601
436102233535 CTM 0223 5263,5394 DL #26 P2.5 CN602
436210433524 CTG 1043 S04,T04 DL #26 P2.0 CN856
4428617265 CNT FPC PLUG EL AN 00-8370-177 CP601
2058322101 DIODE 1N4148 D601-610,618-620
2208606104 TRANSISTOR KTC3198Y-AT Q601-603
2238006104 TRANSISTOR KRC107M Q604,605
2371140711 LED SLR56VR3FL D614-616
3029101970 RES MF 100 1/8W J R628
3029102970 RES MF 1K 1/8W J R601-610,644-647
3029103970 RES MF 10K 1/8W J R617,623,624,626,634-641
3029104970 RES MF 100K1/8W J R622
3029331970 RES MF 330 1/8W J R612,614,616,625
3029333970 RES MF 33K 1/8W J R618
3029472970 RES MF 4K7 1/8W J R611,613,615,619,627,629,642,643
3029473970 RES MF 47K 1/8W J R630-633
3029479970 RES MF 4R7 1/8W J R620-621
3479322871 CAP E SG 0.22UF/50V C616
3479333971 CAP E SG 3.3UF/50V C615
3479347971 CAP E SG 4.7uF/50V C612
3519101935 CAP C AXIAL 100PF/50V J C601-609,623,624

0

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Parts List

8

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
436204503524 CTG 0450 S04,T04 DL #26 P2.0 CN855
4438000210 JACK PHONE 9P G
3029223970 RES MF 22K 1/8W J R852-853
3519561935 CAP C AXIAL 560PF/50V J C852-853

POWER PCB 4002001020 ASSEMBLY

4002001020 Assembled PCB
2168602105 IC KIA7805P REG. U801
3419510241 CAP E SG 1000UF/25V C807
436203153524 CTG 0315 S03,T03 DL #26 P2.0 CN802
436204103524 CTG 0410 S04,T04 DL #26 P2.0 CN803
4428504576 CNT PLUG ST JST B04B-EH-A CP801
4428510416 CNT PLUG ST GIL-S-10P-S2T2-EF CP603
2058322101 DIODE 1N4148 D803,808,810
2208206105 TRANSISTOR KTA1266Y Q801
2208606104 TRANSISTOR KTC3198Y-AT Q802-804
2258128002 DIODE 1N4004 D804-807
2258599300 DIODE ZENER T-72 UZ30V D802
2258599439 DIODE ZENER T-72 UZ4V3 D809
2258599919 DIODE ZENER T-72 UZ9V1 D801
3029102970 RES MF 1K 1/8W J R801
3029103970 RES MF 10K 1/8W J R802
3029332970 RES MF 3K3 1/8W J R804-806
3029470470 RES MF 47 1W J R808
3029470970 RES MF 47 1/8W J R809
3029472970 RES MF 4K7 1/8W J R810-811
3029560970 RES MF 56 1/8W J R803
3479310071 CAP E SG 10uF/50V C801
3479310971 CAP E SG 1uF/50V C808-809
3479347071 CAP E SG 47UF/50V C802
3519104935 CAP C AXIAL 0.1UF/50V J C810,C803
3519473935 CAP C AXIAL 0.047UF/50V J C804-806,811

POWER SWITCH PCB 4002001060 ASSEMBLY

4002001060 Assembled PCB
3549472109 CAP C 0.0047UF/400V AC C854
436502402167 CTJ 0240 201,210 DL #18 P7.92 CN852



Parts List

2

9

9

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 CT451
4428504416 CNT PLUG ST GIL-S-4P-S2T2-EF CP855
5528053001 RELAY DH24D2-OT(M) RLY451,452
2258128002 DIODE 1N4004 D451-452
3679472120 CAP MYLAR 0.0047UF100V J C453-456
3679473120 CAP MYLAR 0.047UF/100V J C451-452

STANDBY PCB 4002001010 ASSEMBLY

4002001010 Assembled PCB
2648701170 FILTER TR25 T852
2828000037 T/F STANDBY RSX965(120V/60Hz) T851
3549472109 CAP C 0.0047UF/400V AC C851
4428502726 CNT PLUG ST MO 35328-0210 P7.92 CP853
4428502746 CNT PLUG ST JE202B-1 T-2(3-2) P7.9
4428503746 CNT PLUG ST JE202B-1 T-3(5-2,4) P7.
4428504416 CNT PLUG ST GIL-S-4P-S2T2-EF CP803
4448000110 AC OUTLET(A),CCT1304-0212
5508101431 FUSE 51S 315MA/250V F851
5508102031 FUSE 51S 1A/250V F853
5508103031 FUSE 51S 5A/250V F852
5528001640 RELAY G5PA-1 DC12V RLY851
2258128002 DIODE 1N4004 D851
3029335380 RES MF 3M3 1/2W J ERC R851

CP852
CP851

VIDEO PCB 4002001030 ASSEMBLY

4002001030 Assembled PCB
2108499133 IC MC14577 U402
2168017141 IC LC7824 ANALOG SWICH U401
4428807464 CNT HOUSING EL 20-8283-007 CB401
4438100520 JACK RCA 3P(Y)
4438100720 JACK RCA 1P(Y)
2238422100 TRANSISTOR DTC323TSTP Q401
3029102970 RES MF 1K 1/8W J R410-412
3029470970 RES MF 47 1/8W J R417-423
3029471970 RES MF 470 1/8W J R413-413,424
3029750970 RES MF 75 1/8W J R401-407
3479310071 CAP E SG 10uF/50V C417-423,C414-415

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