Rotel RX-975 Service manual

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Page 1

Quality uncompromised

ROTEL

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

Page 2

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”

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Wiring Diagram

Page 4

Disassembly Diagram

Page 5

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

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

2028316100 2028016100

2028116108

TRANSISTOR 2SC4833A-Y

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

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Parts List

Q,Q,Q,Q,Q,Q

,,,,,

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

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

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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 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

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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 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



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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 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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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 2168220135 IC NJM5532D DUAL OPAMP U301,303 4428807464 CNT HOUSING EL 20-8283-007 CP302 4428808464 CNT HOUSING EL 20-8283-008 CP301 4438100120 JACK RCA 2P(W,R) RCA301 4438100220 JACK RCA 4P(WW,RR) RCA302 4438100320 JACK RCA 6P(WWW,RRR) RCA303 2058322101 DIODE 1N4148 D301 3029101970 RES MF 100 1/8W J RL/R311-315,326,330 3029102970 RES MF 1K 1/8W J R319-321,RL/R301 3029103970 RES MF 10K 1/8W J RL/R328 3029104970 RES MF 100K1/8W J R318,RL/R308,327,329 3029221970 RES MF 220 1/8W J R309,310,316,317,322,323 3029433970 RES MF 43K 1/8W J RL/R305 3029561970 RES MF 560 1/8W J RL/R307 3029564970 RES MF 560K 1/8W J RL/R304 3029821970 RES MF 820 1/8W J RL/R306 3029913970 RES MF 91K 1/8W J RL/R302,303 3479310971 CAP E SG 1uF/50V C323 3479322871 CAP E SG 0.22UF/50V CL/R307 3479333061 CAP E SG 33UF/35V CL/R309 3479347041 CAP E SG 47uF/25V C309,310,324,326-328 3479347971 CAP E SG 4.7uF/50V CL/R303,330,333 3519101935 CAP C AXIAL 100PF/50V J C325,CL/R301,302,313-322,331-332 3679182120 CAP MYLAR 0.0018UF/100V J CL/CR305,CL/CR308 3679222120 CAP MYLAR 0.0022UF/100V J CL/R304 3679562120 CAP MYLAR 0.0056UF/100V J CL/R306

INPUT VIDEO PCB 4002000410 ASSEMBLY

4002000410 Assembled PCB 2138001115 IC MULTIFLEX BU4053BC U352 2168017132 IC LC78211 ANALOG SWITCH U351 4428809464 CNT HOUSING EL 20-8283-009 CP351 4438100320 JACK RCA 6P(WWW,RRR) RCA351-2 2058322101 DIODE 1N4148 D351 3029101970 RES MF 100 1/8W J RL/R350-355 3029102970 RES MF 1K 1/8W J R362-364 3029104970 RES MF 100K1/8W J R360,RL/R366

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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

4002001100 Assembled PCB 2058100139 DOIDE BRIDGE KBPC2504W-F DB101 2138007120 IC TC9459F ELECT VOL U108 2138007130 IC TC9184P ELECT TONE U105 2168220135 IC NJM5532D DUAL OPAMP U107 2168602109 IC KIA7815P REG. U102 2168602114 IC KIA7915P REG. U103 2408000136 OPTO. COUPLER LTV-817 U101 3409333261 CAP E SG 3300UF/35V C103,C104 3419512381 CAP E AM 12000UF/80V C101,C102 436105409035 CTM 0540 5263,5394 DS #26 P2.5 W201 436503252166 CTJ 0325 201,210 DL #18 P3.96 CN451 4428502746 CNT PLUG ST JE202B-1 T-2(3-2) P7.9 4428503576 CNT PLUG ST JST B03B-EH-A CP204 4428503746 CNT PLUG ST JE202B-1 T-3(5-2,4) P7. 4428617266 CNT FPC PLUG EL ST 00-8370-171 W601 4428807466 CNT PLUG EL 00-8283-0712 W401,W302 4428808466 CNT PLUG EL 00-8283-0812 W301 4428809466 CNT PLUG EL 00-8283-0912 W351 4428810466 CNT PLUG EL 00-8283-1012 W701 4438101120 JACK RCA 4P(WR,WR) 4438300110 JACK RCA YKB21-5103A 5508102031 FUSE 51S 1A/250V F101,F102 7505000210 H/SINK REG TR(24X30) 2208206105 TRANSISTOR KTA1266Y Q106 2208606104 TRANSISTOR KTC3198Y-AT Q104,Q105 2238006103 TRANSISTOR KRA107M Q103 2238422100 TRANSISTOR DTC323TSTP Q101,Q102 2258128002 DIODE 1N4004 D101-D104 2258599270 DIODE ZENER T-72 UZ27V ZD103 2258599569 DIODE ZENER T-72 UZ5V6 ZD104,ZD105 3029101970 RES MF 100 1/8W J R107,R108,R129,R130 3029102970 RES MF 1K 1/8W J R104,R109-R110,R113-R118,R151,R152 3029104970 RES MF 100K1/8W J R133,R134 3029122970 RES MF 1K2 1/8W J R149,R150 3029221970 RES MF 220 1/8W J R106,R111,R112,R119,R120 3029273970 RES MF 27K 1/8W J R145,R146

CP203

CP102

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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 R141,R142 3029823970 RES MF 82K 1/8W J R137,R138

C119,C120,C129,C130,C131,C143,C144,

3479310071 CAP E SG 10uF/50V 3479310971 CAP E SG 1uF/50V C117,C118,C149,C150 3479347041 CAP E SG 47uF/25V C135,C136,C163,C164 3479347971 CAP E SG 4.7uF/50V C123,C124,C155,C156 3519101935 CAP C AXIAL 100PF/50V J C132,C145,C146 3519270935 CAP C AXIAL 27PF/50V J C147,C148 3579104530 CAP C RADIAL 0.1UF/50V J C115,C116,C125,C126,C137,C138 3679104250 CAP MYLAR 0.1UF/250V J C105-C109 3679123120 CAP MYLAR 0.012UF/100V J C153,C154 3679223120 CAP MYLAR 0.022UF/100V J C159,C160 3679272120 CAP MYLAR 0.0027UF/100V J C157,C158 3679473120 CAP MYLAR 0.047UF/100V J C110-C114 3679683120 CAP MYLAR 0.068UF/100V J C151,C152

C161,C162

TUNER PCB 4002001300 ASSEMBLY

4002001300 Assembled PCB 2138017136 IC LM7001 PLL IC701 2168017128 IC LA1266 IF IC702 2168417120 IC LA3401 MPX U703 2258817101 DIODE VARACTOR SVC321SPA-C VD701,702 2618231001 COIL AM-ANT1 M7ZN-K5643A-KR T701 2638231001 COIL AM IFT A7MC-K672713N4-KR T703 2638231001 COIL AM IFT A7MC-K672713N4-KR T702 2658031001 COIL MPX LPF 253AGG-K5001-KR TL706,TR706 2838501111 COIL FM-DET-A1 292BCA-K5713FKG T704 2838501112 COIL FM-DET-B1 292BCA-K5714X T705 3615471110 CAP POLY 470PF/50V J C715 3838001000 TRIMMER 10PF TZ03-T110FR(WHT) TC701 3908001020 FILTER BFU450C4N CF704 3908011071 FILTER FM IF SFE10.7MA5 CF701,702,703 3908101030 CLYSTAL 7.2MHZ X701 3928001010 FRONT-END FTA4-575H FE1 3938131600 RESONATOR CSB-456F15 X702 4408000310 TERMINAL ANT,SC021058KN 4428810464 CNT HOUSING EL 20-8283-010 CB701 2058322101 DIODE 1N4148 D702 2208406103 TRANSISTOR KTC3194Y(KTC1923Y) Q703



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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 RES MF 100K1/8W J R701,704,706 3029124970 RES MF 120K 1/8W J RL746,RR746 3029152970 RES MF 1K5 1/8W J RL757,RR757 3029181970 RES MF 180 1/8W J R711 3029184970 RES MF 180K 1/8W RL747,RR747 3029220970 RES MF 22 1/8W J R729 3029223970 RES MF 22K 1/8W J R726,728,741,743 3029271970 RES MF 270 1/8W J R708,721 3029272970 RES MF 2K7 1/8W J RL748,RR748 3029331970 RES MF 330 1/8W J R720 3029332970 RES MF 3K3 1/8W J R713,733,742,RL749,RR749 3029471970 RES MF 470 1/8W J R705,715,722 3029472970 RES MF 4K7 1/8W J R724,730 3029473970 RES MF 47K 1/8W J R740,744 3029561970 RES MF 560 1/8W J R709,712,714 3029562970 RES MF 5K6 1/8W J R702,732 3029623970 RES MF 62K 1/8W J R703 3029683970 RES MF 68K 1/8W J R725 3248022443 VR SEMI 220K(B)-H RH063MCJ5R VR703 3248047243 VR SEMI 4K7(B)-H RH063MCS3R VR701 3248047343 VR SEMI 47K(B)-H RH063MCS4R VR702 3479310071 CAP E SG 10uF/50V C720,739,749,753,CL751,CR751 3479310131 CAP E SG 100UF/16V C714,735,744 3479310971 CAP E SG 1uF/50V C733,745,747 3479322871 CAP E SG 0.22UF/50V C746 3479333971 CAP E SG 3.3UF/50V C703,727 3479347031 CAP E SG 47UF/16V C711,705 3479347971 CAP E SG 4.7uF/50V C726,728,741 3519101935 CAP C AXIAL 100PF/50V J C710 3519103915 CAP C AXIAL 0.01UF/16V J C704,707,723 3519150935 CAP C AXIAL 15PF/50V J C716

C701,706,712,713,717,718,721,722,724,7

3519223520 CAP C AXIAL 0.022UF/25V J 3519331935 CAP C AXIAL 330PF/50V J C736 3519473935 CAP C AXIAL 0.047UF/50V J C742,C702 3519561935 CAP C AXIAL 560PF/50V J CL750,CR750 3519680935 CAP C AXIAL 68PF/50V J CL752,CR752 3519681935 CAP C AXIAL 680PF/50V J C743

25,729,734,C748

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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 QL215,QL216,QR215,QR216 2028416122 TRANSISTOR 2SC3519A W/ACC QL213,QL214,QR213,QR214 436102101535 POSISTOR P2.5 PTH9M04 MO 100mm 7502000210 POWER HEAT SINK

OTHERS

2608207360 AM ANTENNA LOOP 4348000110 FM ANTENNA 4428400110 MATCHING TRANS(A) 9007000410 INSTRUCTION MANUAL 9605000113 BOX CARTON(INNER) 9625000113 BOX CARTON(OUT) 9722000110 CUSHION POLY 6122000110 TOP COVER ,VCM 0.95T 6715000110 BUMPON 8535000110 FILTER FL, ACRYL 1.0T 8543000211 KNOB MAIN(AL) 8545000211 KNOB ROTARY(AL) 8545000311 BEZEL RING, ABS BLACK 8553000211 WINDOW DISPLAY 8602000311 PANEL FRONT(AL),RX975US 435602120067 CTW 0212 35156,INLET DL#18 P7.92 4408200110 TERMINAL GND 4428000110 JUMPER PLUG 6133100110 FOOT, ABS BLACK 6515000210 SPACER PCB, ABS BLACK 436617281182 CTW 1728 KFC,KFC NL 0.1mm P1.25 8521000110 BODY FRONT, ABS BLACK 8545000110 BUTTON PWR, ABS BLACK

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Chassis Layout

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Adjustment

1. FM Alignments

Necessary measurement equipment:

Stereo Generator, FM/AM Signal Generator, Distortion meter, Oscilloscope, Digital Volt Meter (DVM)

(A) Center Adjust

Stereo Generator Setting: MODE; MONO, Audio Frequency; 1 kHz FM Signal Generator Setting: Deviation; 75 kHz, Frequency; 98.1 MHz, Output Level; 66 dB RX-975 Setting: FM Frequency; 98.1 MHz, FM MODE; MONO

1) Turn FM Signal Generator Modulation On.

2) Connect DVM (+) (-) terminals to both ends of resistor R726 and measure the volt.

3) Make this measured volt ‘0’ by adjusting T704 (FM-DET-A Coil). (The adjustment should be within ± 2mV)

4) After this adjustment, measure THD (Distortion) with Distortion Meter.

5) Adjust THD to minimum point with T-705 (FM-DET-B Coil). (THD should be within 0.5%)

(B) Channel Separation Adjust

Stereo Generator Setting: MODE; STEREO (Only L-channel or R-channel Signal Out), Audio Frequency; 1 kHz FM Signal Generator Setting: Deviation; 75 kHz, Frequency; 98.1 MHz, Output Level; 66 dB RX-975 Setting: FM Frequency; 98.1 MHz, FM MODE; STEREO

1) Turn FM Signal Generator Modulation On after modulating only L-channel or R-channel at Stereo Generator.

2) Confirm if ‘STEREO’ indicator is light On on the display.

3) Measure output level via Distortion Meter and make the level as standard.

4) Turn FM Signal Generator Modulation On after modulation only R-channel or L-channel at Stereo Generator.

5) Measure output level via Distortion Meter (measure per a “dB”).

6) Adjust output level to minimum position with VR702. (lower than –40 dB)

Stereo Generator Setting: MODE; STEREO, Audio Frequency; 1 kHz FM Signal Generator Setting: Deviation; 75 kHz, Frequency; 98.1 MHz, Output Level; 26 dB RX-975 Setting: FM Frequency; 98.1 MHz, FM MODE; STEREO

1) Turn FM Signal Generator Modulation On. (confirm if output level is 26 dB)

2) Adjust VR702 up ton the moment where ‘STEREO’ & ‘TUNE’ indicator turn OFF & ON again.

3) Confirm if ‘STEREO’ & ‘TUNE’ turn OFF when decreasing the output level slowly from 26 dB to 25 dB, 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)

2. AM

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Necessary measurement equipment:

AM Signal Generator, Distortion Meter, Oscilloscope, Digital Volt Meter (DVM)

(A) VT Adjust

AM Signal Generator Setting:

1) Adjust AM Frequency of RX-975 to 520 kHz.

2) Connect (-) terminal of DVM with GND (or chassis) and connect (+) terminal with jumper J704 (VT CHECK) and measure voltage. (Low Frequency VT)

3) Adjust VT to 1.2 volts with T-702 (AM-OSC Coil).

*In case of European version, AM frequency range is 522 kHz ~ 1611 kHz. So, adjust VT to 1.0 volt at 522 kHz. (Low Frequency VT)

(B) Output Level Adjust

AM Signal Generator Setting: Modulation; 30 %, Frequency; 400 Hz, Output Level; 84 dB RX-975 Setting: AM Frequency; 600 kHz

1) Turn AM Signal Generator Modulation On.

2) Adjust output level to maximum point with T701 (AM-ANT Coil).

3) Adjust AM Signal Generator & RX-975 AM Frequency to 144 kHz and measure output level.

4) Adjust output level to maximum point with TC701 (WHITE trimmer).

5) Repeat above 2)~4) steps 2~3 times until adjusting to maximum output levels.

6) Adjust AM Signal Generator & RX-975 AM Frequency to 1000 kHz and measure output level.

7) Adjust level to maximum position with T703 (AM-IFT). *In case of European version, AM Frequency Step is 9 kHz. So, change the standard frequency as below: 522 kHz as 520 kHz 1404 kHz as 1400 kHz 999 kHz as 1000 kHz

AM Signal Generator Setting: Modulation; 30 %, Audio Frequency; 400 Hz, Radio Frequency; 1000 kHz Output Level; 84 dB RX-975 Setting: AM Frequency; 1000 kHz

1) Turn AM Signal Generator Modulation On. (Make sure if Output level is 84 dB)

2) Adjust VR701 (AM-ADJ) up to the moment where ‘TUNED’ indicator turns OFF & ON again.

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. Confirm if search stops at AM Frequency 1000 kHz. (Check with both of High Frequency to 1000 kHz search, Low Frequency to 1000 kHz search) *In case of European version, AM Frequency Step is 9 kHz. So, check above steps with 999 kHz instead of 1000 kHz.

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