Crest LA series pwr amp free download

File name crest audio LA series.pdf

Schematic set LA Series power amplifiers 1. LA 601 / 901 / 1201 Preamp 2. LA 601 Power supply 3. LA 901 / 1201 Power supply 4. LA 601 Output stage 5. LA 901 Output stage 6. LA 1201 Output stage Note: The images in this schematic set are formatted for printing on 11" X 17" tabloid size paper. The schematic set can be printed on 8.5" X 11" paper by using the "Shrink to fit" option in Adobe Acrobat reader, however some of the details will be very small. 8 7 6 5 4 3 2 1 R7 Z1 1N5933 (22V) R24 C1 0.1/100V R23 1 2 3 4 5 6 7 8 J3 CH A OCTAL 10K/1% D3 1N4148 R22 10K/1% D7 1N4148 R3 NOTE 1 J1 CH A 0.1/100V 1 2 3 4 5 6 BAR1 INPUT BARRIER Z3 1N5359 R21 NOTE 2: C3 30pF Z2 1N5933 (22V) VR1 5K R12 6.65K/1% C15 100/100V R6 100K C12 1/63V C14 10/16V/BP C16 100/100V 0.1/100V C18 R20 4.7/1W R9 470 C19 330pF R15 100 3 4 9 6 RLY2 T90N5D12-12 SUPPLY GND SUPPLY GND C23 150pF C21 330pF C6 R26 1 2 3 4 5 6 7 8 J4 CH B OCTAL R4 NOTE 1 R28 NOTE 2 10K/1% D4 1N4148 D6 1N4148 6 5 R25 NOTE 2 30pF 1 R32 100 J10 1 2 3 4 LIMITER 8 D5 1N4148 4 D1 1N4148 NOTE 2 C22 330pF 13 12 30pF 15 10 C24 150pF R10 470 NOTE 4 D C5 R17 100 + C20 330pF 1 + 3 IC1A OPA2604 R2 90.9K/1% C8 0.1/100V 11 C2 C D8 1N4148 B R27 SW1 MSSA2350 10K/1% 7 + IC1B OPA2604 8 7 5 C4 30pF J2 CH B NOTE 1: LA601 = 13.3K/1% LA901 = 12.7K/1% LA1201 = 12.4K/1% LA601 = 30.1K/1% LA901 = 36.5K/1% LA1201 = 40.2K/1% NOTE 3: LA601 = 680/10W LA901 = 820/10W LA1201 = 1K/10W LA601 = 1.5K/2W LA901 = 2.7K/2W LA1201 = 3.3K/2W NOTE 2: A NOTE 4: 8 7 6 - 2 14 IC2B STK3152 1 2 3 4 5 6 7 8 0C1 R31 100 J8 CH A MODULE CH A OUT D C10 R8 15pF R18 100 VTL5C6 CH A MODULE R14 100K/1W/2% R19 4.7/1W C17 0.1/100V RLY1 T90N5D12-12 J9 1 2 RELAY CH B OUT C NOTE 4 CH B MODULE D2 1N4148 + 0C2 2 IC2A STK3152 B J7 CH B MODULE VTL5C6 1 2 3 4 5 6 7 8 1 2 3 4 5 6 BAR2 OUTPUT BARRIER VR2 5K R1 90.9K/1% C7 0.1/100V C9 15pF R11 6.65K/1% R16 100 R13 100K/1W/2% R29 NOTE 3 R30 NOTE 3 R5 100K C13 1/63V C11 10/16V/BP CREST AUDIO INC. 150 Florence Avenue Hawthorne, NJ 07506 Title PREAMP/DRIVER FOR LA SERIES Size B Date: 5 4 3 A Document Number 21B1113-04 Tuesday, May 16, 2000 2 Rev Sheet 1 1 of 1 8 7 6 5 4 3 2 1 R36 100/2W D10 R10 2.2K C10 10/50V R47 1.2K Z8 1N5353 3 1N4148 D9 1N4004 2 J5 IC3B LM393N 7 + D11 1N4148 19.8K/1% R45 3 1K Z5 1N960 R38 R40 1K/1% R41 1K/1% 2 8 IC3A D12 + LM393N 4 R39 19.8K/1% 1 1N4148 R42 100K R43 2.2K Q5 MPSA13 IC2 LM317T R37 442/1% Z6 1N960 C11 0.1/100V 1 2 FAN + FAN GND 1 R19 2.2K R46 1.2K D D 5 6 R44 1K 26-48-1025 TO CH.A MODULE SPKR LEVEL A (DC PROTECT) A CLIPGROUND TEMP SENSOR OUTPUT TEMP SENSOR POWER 5 4 3 2 1 B CH. POWER+ B CH. PROTECT+ GROUND B CLIPA CH. POWER+ A CH. PROTECT+ GROUND A CLIP- J4 22-15-4087 1 2 3 4 5 6 7 8 TO CH.B MODULE 1 2 3 4 5 J2 26-48-1055 C TEMP SENSOR POWER TEMP SENSOR OUTPUT GROUND B CLIPSPKR LEVEL B (DC PROTECT) J1 26-48-1055 C R31 1K/1W R33 1K R34 1K R32 1K/1W J3 26-48-1025 1 2 RELAY A RELAY B R35 180/5W R1 1.5K/1W D1 1