Rotel RA-971 Service manual

Quality Uncompromised

Wiring Diagram

Technical

STEREO INTEGRATED AMPLIFIER

RA-971

Manual

Table of Contents

Specification.....................................1

Wiring Diagram ................................2

Parts List ..........................................3,4

Adjustment.......................................4

PCB Assembly .................................5,6

Schematic Diagram..........................7,8

Specification

Rated power, rms. (20-20,000 Hz, 0.03%, 8 Ohms) 60Watts (20-20,000 Hz, 0.03%, 4 Ohms) 90 watts

Total Harmonic Distortion, (THD) ≤ 0.03% Intermodulation Distortion, (IMD) ≤ 0.03%

Signal to Noise ratio, all inputs > 95 dB IHF A Frequency response 10-100,000 Hz, +1, -3 dB Tone control response

Bass ± 6 dB @ 100 Hz Treble ± 6 dB @ 10 kHz Input overload level, all inputs ≥ 5 volts

Power Requirement 115 volts 60 Hz 230 volts 50 Hz Power consumption 300 watts Dimensions (W x H x D) 440 x 92 x 347 mm 17-3/8 x 3-5/8 x 13-11/16" Weight (net) 6.5 kg, 14.3 lb.

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

Serial. NO. Begining

Y-309A-98061M/S-S

Parts List

SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION

E-1214 PCB ASSEMBLY

C501,502 041 50BGF10M CAP,ELEC.50V10UF C503,504 044 LFSC160V470H CAP,STYROL 160V47PF C505,506 041 50BGF10M CAP,ELEC.50V10UF C507-512 044 50MSAN104J CAP,FILM 50V0.1UF C513,514 042 LTP50V472J CAP,MYLAR 50V4700PF

C515,516 042 LTP50V152J CAP,MYLAR 50V1500PF C517,518 041 50BGF10M CAP,ELEC.50V10UF C519,520 044 LFSC160V101H CAP,STYROL 160V100PF C521,522 041 50BGF10M CAP,ELEC.50V10UF C523,524 041 ECEA1EFS221 CAP,ELEC.25V220UF

C527,528 041 ECEA1EFS221 CAP,ELEC.25V220UF C601,602 041 50BGF4R7M CAP,ELEC.50V4.7UF C603,604 044 LFSC160V331H CAP,STYROL 160V330PF C605,606 044 LFSC160V221H CAP,STYROL 160V220PF C607,608 041 25BGF100M CAP,ELEC.25V100UF

C609,610 044 LFSC160V331H CAP,STYROL 160V330PF C611,612 041 50BGF10M CAP,ELEC.50V10UF C613-616 044 LFSC160V221H CAP,STYROL 160V220PF C617,618 044 MKT18-100V104K CAP,FILM 100V0.1UF C901-904 043 LTC500V103 CAP,CERA.500V0.01UF

R507,508 054 LTMK203K9FECZ R,METAL 1% 3.9K R509,510 054 LTMK2100KFECZ R,METAL 1% 100K R511,512 054 LTMK202K2FECZ R,METAL 1% 2.2K R513,514 054 LTMK2002KFECZ R,METAL 1% 2K R515,516 054 LTMK2022KFECZ R,METAL 1% 22K

R517-520 054 LTMK201K5FECZ R,METAL 1% 1.5K R521,522 054 LTMK2015KFECZ R,METAL 1% 15K R523,524 054 LTMK2100KFECZ R,METAL 1% 100K R525,526 054 LTMK2150RFECZ R,METAL 1% 150R R527,528 054 LTMK201K2FECZ R,METAL 1% 1.2K

R529,530 054 LTMK2002KFECZ R,METAL 1% 2K R531,532 054 LTMK2100KFECZ R,METAL 1% 100K R533,534 054 LTMK2470RFECZ R,METAL 1% 470R R601,602 054 LTMK2560RFECZ R,METAL 1% 560R R603,604 054 LTMK2047KFECZ R,METAL 1% 47K

R605-612 054 LTMK201K5FECZ R,METAL 1% 1.5K R613-616 054 LTMK2220RFECZ R,METAL 1% 220R R617,618 054 LTMF1/4-5600F R,MRS25 560R R619,620 054 LTMK2047KFECZ R,METAL 1% 47K R621-624 054 LTMK2100RFECZ R,METAL 1% 100R

SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION

HEAT SINKER ASSEMBLY

Q617,618 032 L2SD600K-EF TRANSISTOR Q623,624 033 2SC3902-RS TRANSISTOR Q625,626 033 2SA1507-RS TRANSISTOR Q627-630 033 L2SD1047-DE POWER TRANSISTOR Q631-634 033 L2SB817-DE POWER TRANSISTOR

016 TX406111 SUB PCB 017 3TQF-6#1 HEAT SINKER BOARD 019 TO-220 INSULATION SHEET(S) 019 TO-3P INSULATION SHEET(L)

OTHERS

011 FP-483 FRONT PANEL ASSY 012 L4TQF-15 POWER BUTTON 14X14 012 L4TQF-18 KNOB 13F 012 L4TQF-19 KNOB 24F 012 L4TQF-20 KNOB 33F WR

012 L4TQF-21 KNOB 33F WF 012 4TQF-16 PUSH BUTTON 5X10 014 C-4550A09 UPPER COVER 014 L4TR-2797#2 ORNAMENT SIDE BOARD 014 1TQF-5 BOTTOM BOARD

015 RP-347 REAR CHASSIS 019 4TR-2807 PLASTIC FOOT CAP 022 TT-311-UR POWER TRANSFORMER 072 L4TR-670#4 AC CORD for STD 072 LC-3763 AC CORD for AUSTRALIA

072 C-4572A01 AC CORD for UK 072 L4TR-1037 AC CORD for CEE 081 LTZ-183 STYROL SIDE MOULDING 081 SB4-01A00 INSIDE CARTON

C905,906 041 ALC20S1044DG CAP,ELEC.50V10000UF C907,908 041 ECEA1EFS101 CAP,ELEC.25V100UF C909,910 041 ECEA1EFS471 CAP,ELEC.25V470UF C911 041 UTSS1H100 CAP,ELEC.50V10UF C912 041 UTSS1E221-FB CAP,ELEC.25V220UF

C913 044 DE7150F472M SPARK KILLER D601-608 034 LT1N4148-86 DIODE D609-612 034 LT1N4003-TB DIODE D901 034 LBR84 POWER DIODE D902 034 LT1N4003-TB DIODE

D903,904 034 TRD16JST1 ZENER DIODE D905,906 034 LT1N4148-86 DIODE F601,602 036 5ST6.3 MINI FUSE 250V6.3A F901,902 036 5ST6.3 MINI FUSE 250V6.3A IC501 031 OPA2604AP IC

IC502 031 NJM2114D IC Q601-604 033 LT2SC2362KAA-FG TRANSISTOR Q605-610 033 LT2SA1016KAA-FG TRANSISTOR Q611,612 033 LT2SC2362KAA-FG TRANSISTOR Q613,614 033 LT2SA1208AE-RST TRANSISTOR

Q615,616 033 LT2SC2910AE-RST TRANSISTOR Q619,620 033 T2SC3478T-LKU TRANSISTOR Q621,622 033 T2SA1376T-LKU TRANSISTOR Q901 033 L2SD600K-EF TRANSISTOR Q902 033 L2SB631K-EF TRANSISTOR

Q903 032 LT2SC536KAA-FG TRANSISTOR R301-304 054 LTMK2001KFECZ R,METAL 1% 1K R501,502 054 LEE10-151 R,METAL 150R R503,504 054 LEE10-104 R,METAL 100K R505,506 054 LTMK2680RFECZ R,METAL 1% 680R

R625,626 054 LTMF1/4-6801F R,MRS25 6.8K R627,628 054 LTMF1/4-1501F R,MRS25 1.5K R629,630 054 LTMF1/4-3302F R,MRS25 33K R631,632 054 LTMK2001KFECZ R,METAL 1% 1K R633,634 054 LTMK2047RFECZ R,METAL 1% 47R

R635,636 054 LTMK2012KFECZ R,METAL 1% 12K R637-644 054 TNIR2-0.22J R,METAL 2W 0.22R R645,646 054 2WS10JF R,METAL 2W 10R R647-650 054 LTMK2680RFECZ R,METAL 1% 680R R651,652 054 LTMF3301 R,METAL 3.3K

R901,902 054 LTMK203K3FECZ R,METAL 1% 3.3K R904 053 CR14-564J-A R,CARBON 560K R905 054 1WS5.6KJF R,METAL 1W 5.6K R906 053 CR14-681J-A R,CARBON 680R R907 053 CR14-472J-A R,CARBON 4.7K

R908 054 1WS1KJF R,METAL 1W 1K RY901 063 EG2-24NU RELAY S301,302 062 4TR-2781 S501 062 4TR-2780 S601 061 4TR-3302

S901 061 LC-4176A01T POWER SWITCH TH901 034 TTC-503 THERMISTOR VR501 051 C-4170A17 VR502,503 051 4TR-2774 VR601,602 051 LVM6CKPV1S1K SEMI-FIXED RESISTOR

065 C-3399#1 PHONE JACK 066 4TR-2408#1 4P PINJACK(AUX,TAPE) 066 4TR-2408#3 4P PINJACK(CD,TUNER)

067 4TR-3090 SPEAKER TERMINAL 068 LC-3963#1 LED CONNECTOR

ROTALY SWITCH(FUNCTION) ROTALY SWITCH(TONE) PUSH SWITCH(SPEAKER)

VARIABLE RESISTOR(VOLUME) VARIABLE RESISTOR(TONE)

Adjustment

Instruments : DC milli–voltmeter Notes : Prior to Bias Adjustment, run about 5minutes with rated output(8ohms) and

warm up Power Transistor and Heat Sink. Set input off.

TP 1

TP 2

Coupling

Minus Lead

TP 3

TP 4

X-1214 PCB

2SB631K 2SD600K 2SA1507 2SC3902

Location Adjust Adjust for

VR601

DC milli–voltmeter reads 8mV

VR602

OPA2604AP NJM2114D

Step

Plus Lead

2SAS1016K 2SC2362K 2SA1208 2SC2910 2SA1376 2SC3478

2SB817 2SD1047

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Rotel RA-971 Service manual

Specifications and Main Features

Frequently Asked Questions

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