Rotel RA-972 User manual

Technical
Manual
STEREO INTEGRATED AMPLIFIER
RA-972
Table of Contents
Specification
Specification......................................1
Parts List ...........................................2,3,4
Adustment..........................................4
Case Outlines....................................4
PCB Assembly ..................................5,6
Schematic Diagram...........................7~10
Continuous Power Output 60 watts/ch
(20 - 20 kHz, <0.03 %, 8 ohms)
Total Harmonic Distortion (20 Hz - 20k Hz) <0.03 % at rated power,
1/2 power or 1 watt
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) <0.03 % at rated power,
1/2 power or 1 watt
Frequency Response - all inputs 10 Hz - 100 kHz, +1, -3 dB
Dampning Factor (20 - 20,000 Hz, 8 ohms) 150
Input Sensitivity / Impedance 160 mV / 33 kOhms
Input Overload 5 V
Preamplifier Output / Impedance 1 V / 470 ohms
Tone Controls - Bass/Treble ±6 dB at 100 Hz / 10 kHz
Signal to Noise Ratio(IHF"A"weighted) >95 dB
Power Requirements
USA Version 115 volts, 60 Hz
European version 230 volts, 50 Hz
Dimensions(W x H x D) 440 x 92 x 347 mm
173/8" x 55/8" x 1311/16"
Weight 6.5 kg / 14.3 lbs.
SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,
TOKYO 150-0045, JAPAN
Serial. NO.
Beginning
®
Quality Uncompromised
Y-323A-00015C/S-S

2
SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION
Parts List-1
X-1289-01PCBASSEMBLY
C401 041 UTES1J220-FB CAP,ELEC.63V22UF
C501,502 041 50BGF10M CAP,ELEC.50V10UF
C503,504 044 FSC160V470H CAP,STYROL 160V47PF
C505,506 041 50BGF10M CAP,ELEC.50V10UF
C507-512 044 50MSAN104J CAP,FILM 50V0.1UF
C513,514 042 TP50V472J CAP,MYLAR 50V4700PF
C515,516 042 TP50V152J CAP,MYLAR 50V1500PF
C517,518 041 50BGF10M CAP,ELEC.50V10UF
C519,520 044 FSC160V101H CAP,STYROL 160V100PF
C521,522 041 50BGF10M CAP,ELEC.50V10UF
C523,524 041 ECEA1EFS221 CAP,ELEC.25V220UF
C527,528 041 ECEA1EFS221 CAP,ELEC.25V220UF
C529 044 50MSAN104J CAP,FILM 50V0.1UF
C613-616 044 FSC160V561H CAP,STYROL 160V560PF
C617,618 044 KT18-2A104K CAP,FILM 100V0.1UF
C701,702 043 TC50VCH330 CAP,CERA.50V33PF
C703 041 UTSS1H010-FB CAP,ELEC.50V1UF
C704 044 KT18-2A104K CAP,FILM 100V0.1UF
C705 041 UTSS0J222 CAP,ELEC.6.3V2200UF
C707-709 043 TC50V103 CAP,CERA.50V0.01UF
C710 041 UTSS1E470-FB CAP,ELEC.25V47UF
C901-904 043 TC500V103 CAP,CERA.500V0.01UF
C905,906 041 ALN20S1073DD CAP,ELEC.50V10000UF
C907,908 041 ECEA1EFS101 CAP,ELEC.25V100UF
C909,910 041 ECEA1EFS471 CAP,ELEC.25V470UF
C914,915 043 TC500V103 CAP,CERA.500V0.01UF
C916,917 041 UTES1J471 CAP,ELEC.63V470UF
C918,919 041 UTSS1V101-FB CAP,ELEC.35V100UF
C920 041 UTSS1A101-FB CAP,ELEC.10V100UF
C921,922 041 UTSS1E101-FB CAP,ELEC.25V100UF
D401-406 034 T1N4148-86 DIODE
D609-612 034 T1N4003-TB DIODE
D615-617 034 T1N4148-86 DIODE
D722 034 T1N4148-86 DIODE
D723 034 TRD5.6JST1 ZENER DIODE
D724 034 T1N4148-86 DIODE
D726-729 034 T1N4148-86 DIODE
D901 034 BR84 BRIDGE DDIODE
D902,903 034 T1N4003-TB DIODE
D904-906 034 T1N4148-86 DIODE
D907,908 034 TRD16JST1 ZENER DIODE
D909 034 TRD12JST1 ZENER DIODE
F601-604 036 5ST6.3 MINI FUSE 250VT6.3A
IC501 031 OPA2604AP IC
IC502 031 NJM2114D IC
IC701 031 TMP47C400BN-1 IC TMP47C400BN-1A57
IC702 031 TC74HC595AP IC
IC703 031 LB1641 IC
IC901 031 NJM7805FA IC
PJ1-4 066 4TR-2408#3 4P PINJACK
PJ5 066 4TR-2166#4 2P PINJACK
Q401-406 032 TA1345 TRANSISTOR
Q407-412 032 TC3399 TRANSISTOR
Q619,620 033 TC3478A-LKU TRANSISTOR
Q621,622 033 TA1376A-LKU TRANSISTOR
Q623,624 033 C3902-RS TRANSISTOR
Q625,626 033 A1507-RS TRANSISTOR
Q639 032 TC536-FG TRANSISTOR
Q901 033 D600-EF TRANSISTOR
Q902 033 B631-EF TRANSISTOR
Q903 033 D600-EF TRANSISTOR
Q904 032 TD863-EF TRANSISTOR
Q905 032 TC536-FG TRANSISTOR
Q906 033 TA1016-FG TRANSISTOR
Q907,908 032 TC3708-ST TRANSISTOR
Q909 032 TC536-FG TRANSISTOR
R401-404 054 TMK2001KFECZ R,METAL 1% 1K
R405 054 CR14-332J-A R,CARBON 3.3K
R501,502 054 EE10-151 R,METAL 150R
R503,504 054 EE10-104 R,METAL 100K
R505,506 054 TMK2680RFECZ R,METAL 1% 680R
R507,508 054 TMK203K9FECZ R,METAL 1% 3.9K
R509,510 054 TMK2100KFECZ R,METAL 1% 100K
R511,512 054 TMK202K2FECZ R,METAL 1% 2.2K
R513,514 054 TMK2002KFECZ R,METAL 1% 2K
R515,516 054 TMK2022KFECZ R,METAL 1% 22K
R517-520 054 TMK201K5FECZ R,METAL 1% 1.5K
R521,522 054 TMK2015KFECZ R,METAL 1% 15K
R523,524 054 TMK2100KFECZ R,METAL 1% 100K
R525,526 054 TMK2150RFECZ R,METAL 1% 150R
R527,528 054 TMK201K2FECZ R,METAL 1% 1.2K
R529,530 054 TMK2002KFECZ R,METAL 1% 2K
R531,532 054 TMK2100KFECZ R,METAL 1% 100K
R533,534 054 TMK2470RFECZ R,METAL 1% 470R
R631,632 054 TMK2001KFECZ R,METAL 1% 1K
R633,634 054 TMK2047RFECZ R,METAL 1%47R
R637-644 054 NIR2-0.22R R,METAL 2W 0.22R
R645,646 054 2WS10JF R,METAL 2W 10R
R653-656 054 TMK2220RFECZ R,METAL 1% 220R
R678 053 CR14-332J-A R,CARBON 3.3K
R680 053 CR14-104J-A R,CARBON 100K
R701,702 053 CR14-472J-A R,CARBON 4.7K
R703,704 053 CR14-104J-A R,CARBON 100K
R705 053 CR14-124J-A R,CARBON 120K
R706 053 CR14-473J-A R,CARBON 47K
R707 053 CR14-102J-A R,CARBON 1K
R709 053 CR16-100J-A R,CARBON 10R
R711,712 053 CR16-104J-A R,CARBON 100K
R713,714 053 CR14-104J-A R,CARBON 100K
R715 053 CR14-472J-A R,CARBON 4.7K

3
SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION
Parts List-2
R716 053 CR16-104J-A R,CARBON 100K
R901,902 054 TMK203K3FECZ R,METAL 1% 3.3K
R903 054 1WS820JF R,METAL 1W 820R
R904 054 1WS1.2KJF R,METAL 1W 1.2K
R905 053 CR14-472J-A R,CARBON 4.7K
R906 053 CR14-103J-A R,CARBON 10K
R907 054 1WS820JF R,METAL 1W 820R
R908 054 1WS68JF R,METAL 1W 68R
R909 053 CR14-333J-A R,CARBON 33K
R910 053 CR14-223J-A R,CARBON 22K
R911 053 CR14-104J-A R,CARBON 100K
R912 054 1WS10KJF R,METAL 1W 10K
R913 053 CR14-473J-A R,CARBON 47K
R914 053 CR14-683J-A R,CARBON 68K
R915,916 053 CR14-223J-A R,CARBON 22K
R917 053 CR14-332J-A R,CARBON 3.3K
R918 053 CR14-103J-A R,CARBON 10K
R919 053 CR14-562J-A R,CARBON 5.6K
R920 053 CR14-154J-A R,CARBON 150K
R921 053 CR14-104J-A R,CARBON 100K
RY401-406 063 V23106-24 RELAY
RY601,602 063 DH2TU-24 RELAY
RY603 063 V23106-24 RELAY
RY901 063 DG1U-24 RELAY
RY902 063 DH2U-24 RELAY
S401 062 C-4174A17
ROTARY SWITCH(RECORDING)
S501 062 4TR-2780 ROTARY SWITCH(TONE)
SP1,2 067 C-4493A00 SPEAKER TERMINAL
TH901 034 TTC-503 THERMISTOR
VR501 051 C-4170A27
VARIABLE RESISTOR(VOLUME)
VR502,503 053 4TR-2774 VARIABLE RESISTOR(TONE)
X701 023 CSA4.19MHZ CERAMIC RESONATOR
069 C-3417A FUSE CLIP
X-1289-02,03PCBASSEMBLY
C601,602 041 50BGF4R7M CAP,ELEC.50V4.7UF
C603,604 044 FSC160V331H CAP,STYROL 160V330PF
C605,606 044 FSC160V471H CAP,STYROL 160V470PF
C607,608 041 25BGF100M CAP,ELEC.25V100UF
C609,610 044 FSC160V331H CAP,STYROL 160V330PF
C611,612 041 50BGF10M CAP,ELEC.50V10UF
C619,620 044 FSC160V221H CAP,STYROL 160V220PF
D601-608 034 T1N4148-86 DIODE
Q601-604 033 TC2362-FG TRANSISTOR
Q605-610 033 TA1016-FG TRANSISTOR
Q611,612 033 TC2362-FG TRANSISTOR
Q613,614 033 TA1208-RST TRANSISTOR
Q615,616 033 TC2910-RST TRANSISTOR
R601,602 054 TMK2560RFECZ R,METAL 1% 560R
R603,604 054 TMK2047KFECZ R,METAL 1% 47K
R605-612 054 TMK201K5FECZ R,METAL 1% 1.5K
R613-616 054 TMK2220RFECZ R,METAL 1% 220R
R617,618 054 TMF1/4-5600F R,MRS25 560R
R619,620 054 TMK2047KFECZ R,METAL 1% 47K
R621-624 054 TMK2100RFECZ R,METAL 1% 100R
R625,626 054 TMF1/4-6801F R,MRS25 6.8K
R627,628 054 TMF1/4-1001F R,MRS25 1K
R629,630 054 TMF1/4-3302F R,MRS25 33K
R635,636 054 TMK2012KFECZ R,METAL 1% 12K
R651,652 054 TMF3300 R,METAL 330R
VR601,602 051 SFR001-222 SEMI-FIXED RESISTOR 2.2K
X-1289-04 PCB ASSEMBLY
D707-712 034 T1N4148-86 DIODE
D714-720 034 T1N4148-86 DIODE
S701 062 C-4174A13
ROTARY SWITCH(LISTENING)
X-1289-05 PCB ASSEMBLY
D701-706 034 LN38GCPP LED
R710 053 CR16-102J-A R,CARBON 1K
X-1289-06 PCB ASSEMBLY
HJ1 065 C-3399#1 PHONE JACK
R647-650 054 TMK2680RFECZ R,METAL 1% 680R
R667,668 054 1WS1.2KJF R,METAL 1W 1.2K
S601 062 C-4174A19
ROTARY SWITCH(SPEAKERS)
X-1289-07 PCB ASSEMBLY
C706 041 UTSS1E470-FB CAP,ELEC.25V47UF
IC704 031 SBX1810-52 IC
R708 053 CR16-101J-A R,CARBON 100R
X-1289-08 PCB ASSEMBLY
HJ2 065 YKB21-5103A MINI JACK
X-1289-09 PCB ASSEMBLY
C911 044 DE1307E472M SPARK KILLER
S901 061 C-4176A08 POWER SWITCH
X-1289-14 PCB ASSEMBLY
ACO1 069 C-4497A00 AC OUTLET
HEAT SINKER ASSEMBLY
Q617,618 032 D600-EF TRANSISTOR
Q627-630 033 D1047-DE POWER TRANSISTOR
Q631-634 033 B817-DE POWER TRANSISTOR
OTHERS
011 FP-514 FRONT PANEL ASSY
012 QT4-09A00T KNOB 25F (LISTENING)
012 SD4-16A00 PUSH KNOB 12F
012 3TQU-5 KNOB ASSY 33F
012 4TR-3134 KNOB 25F (RECORDING)
012 4TR-3136 KNOB 13F
012 4TSA-7 KNOB 11F
014 C-4550A09 UPPER COVER
014 SZ3-08A00 BOTTOM BOARD

4
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.
Step
X-1289-01 PCB R639
X-1289-01 PCB R640
X-1289-03 PCB VR601
X-1289-02 PCB VR602
1
2
Coupling Location Adjust for
DC milli–voltmeter reads 5mV
SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION
Parts List-3
Adjustment
Case Outlines
2SC536K
2SA1345
2SC3399
2SA1376A
2SC3478A
2SC3708
NJM7805FA
2SB631K
2SD600K
2SC3902
2SA1507
2SB817
2SD1047
LB1641
TC74HC595AP
TMP47C400BN-1
NJM2114D
OPA2604AP
015 RP-376 PRINTED REAR CHASSIS
019 4TSH-19#2 PLASTIC FOOT
022 TT-311-UR POWER TRANSFORMER
034 SEL1124R LED
069 C-4629A01 AC INLET
072 C-4620A01 AC CORD SET for STD
072 C-4622A01
AC CORD SET for AUSTRALIA
072 C-4623A01 AC CORD SET for UK
072 C-4624A01 AC CORD SET for CEE
081 SZ4-21A00 INSIDE CARTON
081 TZ-183 STYROL MOULDING
092 RR-A91 REMOTE UNIT

5 6
PCB Aassembly

7 8
Schematic Diagram

910
Schematic Diagram