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VCC+ VCCR38 10K R27
D
R39 1M R45 33.2K/.1%/1W
C12 0.47/250V C14 0.1/50V R59 511/1% R69 10K/5W Q11 MMBT5551
D
220
8 9
14 D21 1N4148 IC3C LM339D + R41 2.21K R42 2.21K R28 D12 6 7
6
VCC+ VCC+ R29 3 3.9K 2 IC3A LM339D R81 10K R40 1M
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+ 12
VCCGND SIG IN GND CONTROL LINE OUT CLIP IGM SIG MON SIG MON + GND GND GND +22V +22V -22V -22V 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 R20 10K ATTENUATOR DRIVER 1 IC3B LM339D + 576/1% 1N4148
C
R84 150K
VCC+ R83 200/0.5W Z2
J2 26-48-1166
MLL4746 C17 0.1/50V R82 200/0.5W Z1
+VCC = +18vdc -VCC = -18vdc IC2B OPA2604AU 5 6 R22 100K D4 1N4148 D5 + R23 150K
MLL4746 VCC-
R49 220
R50 10K 13 IC3D LM339D + 11 10
7
R26 100
C7 15pF R25 10K R24 10K 8 R65 100
1N4148
C18 0.1/50V
B
2 3
+ 4
1 IC2A OPA2604AU SIGNAL DETECTOR
B
R84, R85 USED REV -04 D11 NOT USED TILL REV 0?
01-25-94 CHANGED R29 FROM 2.2K TO 3.9K 5/7/96 UPDATED SCHEMATIC I.F. CHANGED Q6,Q9 FROM MMBT5551 TO 2SC2880 CHANGED Q7,Q10 FROM MMBT5401 TO 2SA1200 CHANGED Q4 FROM MMBT5551 TO MMBT6517 CHANGED Q5 FROM MMBT5401 TO MMBT6520
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R47 33.2K/1W R43 2.26K/.1% D22 1N4148
Z3
MLL5258A 2SC2880 Q6 R57 Q8A MMPQ6700 Q9 2SC2880 R74 47 MMPQ6700 Q8B R67 68.1/1% R71 100 D18
R86 0
100
R61 68.1/1% R85 0 D23 1N4148 R44 2.26K/.1% R48 33.2K/.1%/1W R46 CURRENT LIMITER 33.2K/1W D17 1N4148 R55 100 VCC+ MMBT6520 Q5 R53 150K R58 D14 1N4148 D15 1N4148 R52 150K R54 1M C15 2SA1200 0.1/50V Q7 100 Q8C MMPQ6700 R62 68.1/1% C10 0.001/50V D16 1N4148 R12 100K R63 8.25K/1%
HER155 R76 33K/2W 1 2 3 4 5 6 7 8 9 10 11 12 J1 09-52-3121 HI RL HI RL IGM CLIP - VA B - VA C FB GND NOT USED NOT USED INTCONN INTCONN HI RL + HI RL + IGM + CLIP + + VA B + VA C FB GND NOT USED - VA C INTCONN INTCONN
R64 8.25K/1% R78 2.7K C16 30pF
R79 11K/1%/1W
R80 576/1%
R72 100
R77 33K/2W D19 HER155
R68 68.1/1%
1 2 3 4 5 6 7 8 9 10 11 12 J4 09-52-3121
C
R51 1M
MMPQ6700 Q8D Q10 2SA1200
R75 47
VCCMMBT6517 Q4
Z4
MLL5258A
Q12 MMBT5401 R70 10K/5W
R60 511/1% C13 0.47/250V
R56 100
A
CREST AUDIO 100 EISENHOWER DRIVE PARAMUS, NJ 07652 Title 10001 PREAMP Size C Date:
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Document Number Monday, May 15, 2000 Sheet
1
Rev 0 of 0