ShureメーカーSR105の使用説明書/サービス説明書
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SR105 Power Amplifier OPERATION AND SERVICE MANUAL Manufactured by SHURE BROTHERS INC. 222 Hartrey Avenue Evanston, Illinois 60204 U.S.A. WARNING To reduce the risk of fire or electric shock, do not expose this appliance to rain or extreme moisture. Copyright 1979, Shure Brothers Inc.
SR105 Power Amplifier SPECIFICATIONS The following specifications apply to both SR105A and SR105B Power Amplifiers except where noted. The SR105A Power Amplifier provides both direct-coupled speaker output and transformer-coupled, constant-voltage, 70-volt output.
SR105 Power Amplifier SPECIFICATIONS (Curves shown are typical) FREQUENCY (Hz1 OUTPUT POWER (WATTS) TOTAL HARMONIC DISTORTION VS. OUTPUT POWER TO 4-OHM LOAD AT 50 HZ, 1 KHZ & 10 KHz (DIRECT OUTPUT ONLY) OUTPUT POWER VS.
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SR105 Power Amplifier TABLE OF CONTENTS Section Page ............................... SPECIFICATIONS ii DESCRIPTION .................................. 1 OPERATING INSTRUCTIONS ........................ Functional Identification 3 .................. General Operating Instructions 3 .
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SR105 Power Amplifier DESCRIPTION (Shown in A105A Carrying Case) The Shure SR105 Power Amplifier is a high-power ampli- fier designed for sound reinforcement applications. It is capsble of delivering 200 watts rms to a 4-ohm load, and is available in two models, the SR105A and SR105B.
FIGURE 1. SR105 POWER AMPLIFIER FRONT PANEL FIGURE 2. SR105 POWER AMPLIFIER REAR PANEL (SR105A MODEL SHOWN).
SR105 Power Amplifier OPERATING INSTRUCTIONS FUNCTIONAL IDENTIFICATION (Refer to Figures 1 and 2, Page 2). 1. OUTPUT VOLTAGE Meter - lndicates Amplifier out- put voltage in percentage of maximum voltage. 2. VOLUME Control - Controls Amplifier output level.
MOUNTING AND VENTILATION The SR105 Power Amplifier is designed for rack-mount- ing in a standard 19-inch (483 mm) audio equipment cabinet rack and is supplied with the necessary mounting hardware. To insure adequate air circulation, a minimum clearance of 51 mm (2 in.
FIGURE 4. SR105 POWER AMPLIFIER BLOCK DIAGRAM METER RECTIFIER In applications where the Amplifier is located at a con- siderable distance from the mixer-preamplifier, electrical interference or excessive hum pickup may be encountered.
FIGURE 5. INPUT CONNECTIONS @ UNBALANCED PARALLELED MIXER- PREAMPLIFIER POWER AMPLIFIER 0 I I I I I / A 0 UNBALANCED PARALLELED HIGH-IMPEDANCE INPUTS A TO POWER AMPLIFIER - - OR HIGH-IMPEDANCE OUTPUT .
2 3 4 5 678910 20 30 40 LOAD IMPEDANCE (OHMS) FIGURE 6. TYPICAL OUTPUT POWER VS. LOAD IMPEDANCE FROM 2 OHMS TO 32 OHMS I1 KHz. 2% TOTAL HARMONIC DISTORTION) (DIRECT OUTPUT ONLY) tection circuitry and cause low-frequency breakup or dis- tortion of the Amplifier audio output.
AMPLIFIER-TO-SPEAKER DISTANCE (FEET1 200 400 600 800 1000 1200 36 - 32 0) i 28 Y 2 24 Y 0 1 20 P 3 16 L J I2 0 8 4 0 50 100 1% 200 250 300 AMPLIFIER-TO-SPEAKER DISTANCE (METERS1 FIGURE 8. RECOMMENDED WIRE GAUGE VS. AMPLIFIER-TO-SPEAKER DISTANCE: DIRECT OUTPUT gauge.
dance may be calculated by the formula: 1 1 1 1 -=- f-+- . . . . etc. ZT ZI 22 Z, where ZT is the total impedance, Z, is the impedance of the first speaker, Z, is the impedance of the second speaker, and so forth, with a total number of fractional terms equal to the total number of speakers in the group.
Meter Reading Output Power 100% 1 X 86.7% 3/4X 70.7% 1 /2X 50 % 1 /4X 33.3% 1/10X 10% 1/1oox In most applications, the VOLUME Control (2) setting of the Amplifier is determined by the sound level require- ments of the area being served.
duce approximately 28.3 volts at the DIRECT OUTPUT terminals (8,9), or 70 volts at the 70V OUTPUT terminals (11) when the 70-volt input line is supplying 70 volts.
SR105 Power Amplifier SERVICE INSTRUCTIONS AMPLIFIER SERVICE (See Guarantee) The SR105 Power Amplifier uses components of the high- est quality, operating well within their respective ratings to assure long life. WARNING Voltages in this equipment are hazardous to life.
R39 R40 Dl2 R36 T2 C14 C15 R3 1 Q8 R35 Q7 R43 PL2 MI PL3 (XPL2) (XPL3) Y SRIOSA MODEL ONLY FIGURE 13. SR105 POWER AMPLIFIER TOP VIEW, COVER REMOVED (SRlOSA MODEL SHOWN) adjustment screw below the meter face until the needle is Circuit Board. (The SR105B Amplifier contains only a Main properly positioned.
Main Circuit Board SMALL SIGNAL AND PREDRIVER TRANSISTORS Transistors Q1 through Q6, Q13, Q14, and Q201 through Q203 are mounted on printed circuit boards. When re- placing these transistors it is imperative that proper lead configuration be followed.
OUTPUT TRANSISTORS Output transistors Q9 through Q12 (Figure 13, Page 13) are located on the black, finned heat sinks. The replace- ment procedure is the same as that used for driver tran- sistors Q7 and Q8. NOTE: Output transistors Q9 through Q12 must be matched for current gain.
11 TOOLS /I Description SR105B AMPLIFIER PARTS Pliers, Diagonal, or Wire Stripper *'Four machine screws presently securing rear-panel 70-Volt Conversion Cover (53A1319) may be used. CONVERSION MATERIALS I( Pliers, Long-nose Qty. 2 2 4 4 - - - required.
in the space exposed by removal of the cover using four 6-32 x 3h1' Phillips head machine screws. Be sure to orient the screw contacts on the terminal strip in the same man- ner as the existing DIRECT OUTPUT terminal strip.
S 4 OFF JI-J2 e TS2 - - GROMMET x J e 3 d m WHT a FILTER &- + CIRCUIT t BOARD TU 1 YEL / BLK H& RED a J MAIN CIRCUIT BOARD R4 1 VOLUME FIGURE 17.
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REPLACEMENT PARTS FOR SR105 POWER AMPLIFIER 04, D5 I - I - 1 86A415 1 Diode,Silicon, Computer, 75V - Reference Designation Q8 Q9-Q12 R35-R40 R41 R43, R44 R45, R46 S 1 52, S3 S4 TI T2 T3 TB1 TB2 W1 W2 XF1 XPLl XPL2 D8, D9 I RKCl9 1 4 1 86A405 1 Diode, Germanium.
REPLACEMENT PARTS FOR SR105 POWER AMPLIFIER Reference Designation I RKC9 1 4 1 86A349 / Transistor. Silicon. NPN Replacement Kit Consists Of: Kit. No.* Part No.
FIGURE 18. MAIN CIRCUIT BOARD PARTS LOCATION DIAGRAM 2038-21525-2 FIGURE 19. FILTER CIRCUIT BOARD PARTS LOCATION DIAGRAM.
SR105 Power Amplifier NOTES TO CIRCUIT DIAGRAM GENERAL Shure part numbers are not shown in the Parts List accompanying the Circuit Diagram (Figure 21, Page 25) if parts are readily available through local electronics parts suppliers. In these instances, the Circuit Diagram shows only the reference designation and value of the standard parts.
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LINE LEVEL INPUTS 120 VAC 50160 H r NOTE I: DIFFERENCES BETWEEN SRIOSA AND SR105B: "STRAIGHT- THROUGH" WIRING SHOWS SRlOSB CIRCUITS; SRIOSA CIRCUITS INCLUDE ASSEMBLY A2, SWITCH S4, TRANSFORMER T3, AND TERMINAL STRIP TS2. SRIOSB REFERENCE NO.
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SR105 Power Amplifier CONDENSED OPERATING INSTRUCTIONS DIRECT SPEAKER OUTPUT (MODELS SRlOSA and SRlOSBI CONSTANT VOLTAGE 70-VOLT SPEAKER OUTPUT (MODEL SRlOSA ONLY) I. 'with line cord unplugged, install Amplifier in rack or l. Amplifier and connect auxiliary equipment as carrying case, allowing adequate ventilation.
The Amplifier shall have built-in circuitry to protect the Amplifier from open circuit, short circuit, or mismatched output loads, by using current-limiting, voltage-limiting, temperature-sensing diodes, and thermal-sensing switches.
デバイスShure SR105の購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Shure SR105をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはShure SR105の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Shure SR105の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Shure SR105で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Shure SR105を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はShure SR105の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Shure SR105に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちShure SR105デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。