Scott-T311S-A236S-R-31S-R-34S-Service-Manual 电路图 维修手册.pdf

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1、price$7.00 SERVICE MANUAL solid state stereo components T-311S A-2365 R-315 R-345 Cll SC OTT . where innovation is a tradition H. H. SCOTT, INC., 111 Powder Mill Road, Maynard, Massachusetts 01754, Tel. 617 897-8801 RadioFans.CN 收音机爱 好者资料库 Audio Specifications FM and AM Specifications General Specif

2、ications Figure FM-1 Test and Alignment Audio Test Procedure Tuner Alignment Procedure FM Alignment Procedure . Multiplex Alignment Procedure Front End Circuit Diagram TABLE OF CONTENTS Dial Cord Stringing Diagram Dial Cord Stringing Instructions Notes T-311S Circuit Diagram A-236S Circuit Diagram R

3、-31S Circuit Diagram R-34S Circuit Diagram Notes Copyright H. H. Scott, Inc., 1975 Page ,Number 1 2 3 4 5 6-9 10 11 12 13 14 15 16 17-18 19-20 21-22 23-24 25 Printed in U.S.A. 029-1175-032 RadioFans.CN 收音机爱 好者资料库 AUDIO SPECIFICA llONS R-31S, A-2368 AND R-34S Output Power: R-31S Note 3 dB Flat increa

4、se. Volume Frequency to 100 Hz; +3 dB 1111 Oclock Note 7 dB increase Loudness Sw. On Crosstalk Aux. Selector AC VTVM 3V Speaker lfl Speaker Ill Set output for O dB Left Aux. H O Channel Tone Control 8 ohm load high 8 ohm load low Read right channel Min. Flat output 30 dB down Comp. Sw. Off Volume Ma

5、ximum Mode Switch Stereo AUDIO TEST PROCEDURE CONTROL TEST SCALE MEASURE AT TEST INPUT SETTINGS I EQUIPMENT! SETTINGS POSITIVE PROBE NEGATIVE PROBE Balance Control Aux. Left Channel 1000 Hz Harmonic* I Aux. Distortion 20 Hz 1000 Hz 20,000 Hz Selector I AC VTVM I 3V Aux. Tone Control Flat Comp. Sw. O

6、ff Volume Maximum Mode Switch Mono Balance CCW Balance CW Selector Aux. Mode Switch Mono Balance Center Volume Maximum AC VTVM Harmonic Distortion Analyzer 30V *Note: Power line Voltage 117 VAC 2. CY!. line THD. co Damping Factor Aux. 1000 Hz Selector Aux. Mode Switch Mono Balance Center Volume Maxi

7、mum AC VTVM 30V Speaker #1 H 8 ohm load high Speaker #1 H 8 ohm load high Speaker Ill H 8 ohm load high Speaker ftl O 8 ohm load low Speaker Ill O 8 ohm load low Speaker #1 O 8 ohm load low READINGS Set output for O dB Note 45 dB drop in output, right chan. Note 45 dB drop in output, left chan. Set

8、output to I 10.96V (A-236 Same Osc. trimmer Rear section of Front End Off stn. Adjust for calibration 4. Same as above Same as above Same as above Same Same Same Ant. trimmer R.F. trimmer, Front End 5. Same as above Same as above 600 kHz Same 600 kHz Same Ant. slider Antenna-soften wax, adjust under

9、 brkt. slider, adjust for maximum 6. Repeat steps 2, 3, 4 tIIY f . Yfl . I I 20 R-31S CIRCUI 21 R-31S CIRCUIT DIAGRAM 0 a: u * a: . oy-,.- . ,.;,o-!/;!/i_ - : :1: tS: ,.,_, - . . .:iL. -?; ., - , . : . 9 , W:. N l CIRCUIT DIAGRAM R-31S AND R-345 NOTES Unless otherwise specified, all capacitors are i

10、n microfarads, all resistors are in ohms, t Watt, 10% (or less) tolerance, and all voltages 10%, measured with 20,000 ohm per Volt VOM. 117V power line. C306 and C314 not used in some units. Front ends marked FL-311 or FL-315 may be used in some production. Switch (S-1) Pointer . Function Stereo Dial Speaker Power Dial LAMPS FUSES 6.3V 40 mA 12V 40 mA 12V 80 mA 6.3V 220 mA l.SA Fast-Blo (R-34; 2A) l.SA Slo-Blo 100-125V 0. 7A Slo-Blo 220-240V Suitable length of #30 Awg. copper (0.010 inch dia.) Replace only with original approved type.