Wiring Diagram
Quality Uncompromised
®
Technical
Manual
STEREO INTEGRATED AMPLIFIER
RA-971
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 |
|
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(20-20,000 Hz, 0.03%, 4 Ohms) |
90 watts |
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Total Harmonic Distortion, (THD) |
≤ |
0.03% |
|
Intermodulation Distortion, (IMD) |
≤ |
0.03% |
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Signal to Noise ratio, all inputs |
> 95 dB IHF A |
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Frequency response |
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10-100,000 Hz, +1, -3 dB |
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Tone control response |
|
± |
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Bass |
|
6 dB @ 100 Hz |
|
Treble |
|
± |
6 dB @ 10 kHz |
Input overload level, all inputs |
≥ |
5 volts |
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Power Requirement |
|
115 volts 60 Hz |
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230 volts 50 Hz |
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Power consumption |
|
300 watts |
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Dimensions (W x H x D) |
|
440 x 92 x 347 mm |
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17-3/8 x 3-5/8 x 13-11/16" |
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Weight (net) |
|
6.5 kg, 14.3 lb. |
|
Serial. NO.
BUNZAN-SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,
Begining
TOKYO 150-0045, JAPAN
Y-309A-98061M/S-S
2
Parts List
SYMBOL |
PARTS NO. |
DESCRIPTION |
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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 |
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 |
|
|
|
SYMBOL |
PARTS NO. |
DESCRIPTION |
|
|
|
|
|
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 |
|
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 |
ROTALY SWITCH(FUNCTION) |
|
S501 |
062 4TR-2780 |
ROTALY SWITCH(TONE) |
|
S601 |
061 4TR-3302 |
PUSH SWITCH(SPEAKER) |
|
S901 |
061 LC-4176A01T |
POWER SWITCH |
|
TH901 |
034 TTC-503 |
THERMISTOR |
|
VR501 |
051 C-4170A17 |
VARIABLE RESISTOR(VOLUME) |
|
VR502,503 |
051 4TR-2774 |
VARIABLE RESISTOR(TONE) |
|
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 |
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Parts List
SYMBOL |
PARTS NO. |
DESCRIPTION |
|
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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) |
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|
OTHERS |
|
|
011 FP-483 |
FRONT PANEL ASSY |
|
|
012 L4TQF-15 |
POWER BUTTON 14X14 |
|
|
012 L4TQF-18 |
KNOB 13F |
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|
012 L4TQF-19 |
KNOB 24F |
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|
012 L4TQF-20 |
KNOB 33F WR |
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|
|
SYMBOL PARTS NO. |
DESCRIPTION |
|
|
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 |
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Adjustment
Instruments |
: DC milli–voltmeter |
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Notes |
: Prior to Bias Adjustment, run about 5minutes with rated output(8ohms) and |
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warm up Power Transistor and Heat Sink. Set input off. |
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Step |
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Coupling |
Location |
Adjust |
Adjust for |
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Plus Lead |
Minus Lead |
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1 |
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TP 1 |
TP 3 |
X-1214 |
PCB |
VR601 |
DC milli–voltmeter reads 8mV |
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2 |
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TP 2 |
TP 4 |
X-1214 |
PCB |
VR602 |
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1 |
8 7 6 |
5 |
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2 |
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3 |
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E C B |
4 |
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OPA2604AP |
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B |
2SB631K |
NJM2114D |
C |
2SD600K |
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E |
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2SAS1016K |
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2SB817 |
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2SA1507 |
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2SC2362K |
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2SD1047 |
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2SC3902 |
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2SA1208 |
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2SC2910 |
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2SA1376 |
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2SC3478 |
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3 |
4 |
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