Scott-Alpha-1-Alpha-6-Service-Manual 电路图 维修手册.pdf

price $6.00 SERVICE MANUAL stereo components ILPIA 1 ILPIII ffiSCOTE The Name to listen to. H. H. SCOTT, INC., 20 Commerce Way, Woburn, Mass. 01801, Tel. 617 933-8800 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 -NOTICE- The following safety precautions must be followed to assure continued reliability and safety against fire and shock hazard: 1.) Replacement parts used during servicing of this appliance must have identical characteristics as those offered and recommended by H. H. Scott, Inc. 2.) Satisfactory and approved service procedures dictate that ALL PARTS, no matter how apparently unimportant, be replaced exactly as in the original design. EXAMPLES: a) b) c) d) Braided glass tubing over resistors. Heatsinks on transistors. Ceramic tube spacers. All mechanical parts, i.e. covers, brackets, screws etc. 3.) A dielectric test is to be performed on each appliance following the re-assembly and before returning the unit to the customer. 4.) The dielectric test, to be performed on H. H. Scott, Inc. electronic components service? in the U. S. and Canada for use in these countries, shall consist of not less than the following:* 1.) A dielectric tester designed to supply not less than 1100 volts at 60 Hz and employing leakage current indicator/s is to be used. 2.) The tester is to be connected pet the instructions enclosed with the instrument, or as follows: a)The tester is connected to the power line receptacle, and the power switch is turned ON. b)Sufficient time is allowed for the tester supply to stabilize and then the output voltage is adjusted for 1080 volts. c)Leads of the tester, usually marked GND and HV, are connected between chassis GND and both blades of the male plug of the power cord. d)Switch tester to test and observe leakage indicator. LEAKAGE CURRENT MUST NOT EXCEED 0.5 mA. * Dielectric tests made by service personnl in countries other than United States and Canada must use test equipment and procedures specified by the safety agency serving that country. coPYRIGHT H.H.SCOTT ELECTRON1cs Printed in USA 6/78 029-117 5-044 H. H. Scott Electronics is a registered trademark of H. H. Scott, Inc. RadioFans.CN 收音机爱 好者资料库 ALPHA 1 PREAMPLIFIER SPECIFICATIONS Distortion at rated output (THD) IM distortion (SMPTE) Rated output level Maximum output level Sensitivity -phono (switchable) -phono 2 -mie (variable) . -tuner, aux, tape . S/N ratio A weighted -phono -tuner, aux, tape Frequency response (+0.5dB) -phono/mie - -tuner, aux, tape Phono overload Input impedance -low level inputs . -high level inputs Output impedance -preamp out/access out -tape out . . . Tone control range (+ldB) -bass (300Hz position) (lOOHz position) -midrange . . . . -treble (3kHz position) (8kHz position) . Filters (12dB/octave) -low . . -high . . . Volume compensation . Mute switch attenuation Power requirements Power consumption Weight . Dimensions - H/W/D ALPHA 6 POWER AMPLIFIER SPECIFICATIONS -*Power output . . Maximum THD at rated output Maximum IMD Input sensitivity . Input impedance . . . S/N ratio A weighted Frequency response Damping factor (1000Hz) Slewing rate . . Power requirements Power consumption -id le -max . . Net weight Dimensions - H/W/D . . . . 0.05% 0.08% 2.5V lOV 2.5mV/9mV 2.5mV to 750V 250mV 75dB 90dB 20Hz - 20kHz 15Hz - 35kHz 125mV/450mV 47K ohms 50K ohms 600 ohms 10K ohms +lldB at 100Hz +7dB at 50Hz +7dB at lkHz +lldB at lOkHz +7dB at 20kHz -3dB at 40 and 80Hz -3dB at 8 and 12kHz +7dB at 100Hz +3dB at lOkHz -20dB 120/220VAC 50/60Hz 15 Watts 15 lbs., 6.8 kg 5 1/8 /19 /12 1/2 60 Watts 0.1% 0.1% l.OV 25K ohm lOOdB lOHz - 50kHz 50 12V /)1S 120/220VAC 50/60Hz 40 Watts 450 Watts 40 lbs., 18.4 kg 5 1/ 4 Il/ 1911 / 12 1/ 211 *Per H. Ho Scott, Inc. output power statement as required by the Federal Trade Commission. 2