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Schematic set
PFA600 Power amplifiers
1. Display board
2. Input board
3. Preamp
4. Power supply driver
5. Power supply board
6. Relay board
7. Voltage monitor
8. Output module
8 7 6 5 4 3 2 1
J3
RELAY CH. B
1 RELAY CH. A
2 RELAY GROUND
D 3 RELAY GROUND D
4 LED GROUND
5 ACTIVE CH. B
6 TEMP/DC CH. B
7 SIGNAL CH. B
8 CLIP CH. B
9 CLIP CH. A
10 SIGNAL CH. A
11 TEMP/DC CH. A
12 ACTIVE CH. A
R42 13
91/10W 26-48-1136
R5 R7 R9 R10 R8 R6
2.7K 100K 2.7K 2.7K 100K 2.7K
Z3
1N5344
R3 Q1 C6 R4
2N5551
100/25V
2N5551
10K Q2 10K
Z4
C5 1N5344
0.1/100V
Q3
2N5551
2N5551 Q4
Z5
1N5344
C C
D3 D7 C1 D9 D8 C2 D6 D4 D2
D5
1N4148 1N4148 1N4148 1/50V 1N4148 1N4148 1/50V 1N4148 1N4148 1N4148
J1 J2
A/B MUTE +24V. OUT
SIGNAL CH. B 15 1 SIGNAL CH. A
CLIP CH. B 14 2 CLIP CH. A
CONTROL V. CH. B 13 C4 3 CONTROL V. CH. A
12 R11 C3 R12 4
LIMIT CH. B LIMIT CH. A
MUTE CH. B 11 5 MUTE CH. A
AMP OUT CH. B 10 5K/5W
TR1 5K/5W 6 AMP OUT CH. A
9 470/6.3V 470/6.3V 7
TEMP SENSOR + CH. B TEMP SENSOR + CH. A
TEMP SENSOR OUT CH. B 8 8 TEMP SENSOR OUT CH. A
TEMP SENSOR GND CH. B 7 9 TEMP SENSOR GND. CH.A
GROUND 6 10 GROUND
5 R13 R14 11
GROUND TR2 GROUND
4 MAC97A 12
GROUND Z1 Z2 D21 GROUND
FAN GROUND 3 10K 10K 13 +24V. IN CH. A
1N5927 1N5927 MAC97A
FAN + 2 14 +24V. IN CH. B
1 C8 C7 15
1N4004
26-48-1156 100/25V 26-48-1156
100/25V D20
D11 D10
1N4004
1N4148 1N4148
R19 R21 R23 R24 R22 R20
D13 1K D12
7.5K 1K 1K/1% 1K/1% 7.5K
1N4148
1N4148
R18 R16
2.7K 2.7K
13
B
D19 8 D18
B
1N4148 1N4148 12
13
D15 IC1E D14 +
- 6 LM614 15 - 10
- 2 7 16 11
-
1 + 5 14 + IC1C
+ 3 1N4148 IC1D LM614
IC1B LM614 1N4148
IC1A
9
LM614 LM614
R17
4
R39 100K
2.7K R38
R26
R25 100K 47K
R15 47K R31 R35 R36 R32
2.7K MPSA75 390K 390K R30 Q6
499/1% 499/1%
R29 10K
D17 D16 MPSA75
10K
Q5 1N4148 1N4148
R28
R27 R33 R37 R34 4.3K R44
R43 4.3K 4.7K 2.2K 4.7K 15
15
D22 D23
1N4004 1N4004
A A
CREST AUDIO INC.
150 Florence Ave.
Hawthorne, NJ 07506
Title
PFA600 DISPLAY/PROTECT DRIVER
Size Document Number Rev
C 21C1169
Date: Tuesday, June 27, 2000 Sheet 1 of 0
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
D D
J1
1
2 J3
3
4 17
5 16
6 15
7 14
8 VR1 13
PTC15XD 5KAP 12
PL08 11
VR2 10
9
C PTC15XD 5KAP 8 C
J2 7
6
1 5
2 4
3 3
4 2
5 1
6
7 26-48-1175
8 R1 680/10W
PL08
R2 680/10W
BAR1
B 1 B
2
3
4
5
6 .25 LUG
72706-C-50-81
CREST AUDIO INC.
A 150 Florence Ave. A
Hawthorne, NJ 07506
Title
PFA600 INPUT PCB
Size Document Number Rev
A 21A1171
Date: Tuesday, June 27, 2000 Sheet 1 of 1
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
R8 VCC+
VCC+ 100K
R34 R35
R6 R9 499/1% 1.0K/1%
D1
10K
1N4148 Z1 1N5353
R1 Q1 10K VCC+
2N5401
D 15K Q2 D
R3 2N5551 R36 C14 470uF
R2 MPSA75 C2 R31
330K 10K 47/35V 3.3K R65
C1 4.7K
Q3 1 16
100/35V R10 D3 C16 470uF NOTE 3
2 15
1N4148 3 14
100K R32
R4 R5 R7 R11 4 13
D2 5 12
VCC- 1.0K/1% C18
4.7K 10K 2.2K 1N4148 6 11
22K TURN ON DELAY D13 7 10
1N4148 8 9 0.47/250V R59 R69
R33 C20 511/1% NOTE 1
IC4 R37
R13 22K NE5517AN 47K 0.1uF
Q14
13 2N5551
12 220K
11 C13
10 VCC+ C5 R83
10/35V NOTE 4 Z3 1N5938
9 R30 47K Q10 R73
8 470pF
C3 0.1/50V VCC- Q6 2N5551 0
7 2N5551
6 C6 30pF
5 R74
D5
4 ATTENUATION/MUTE
1N4148
3 SIP1A SIP1B R57 Q8 47
2N5551
2
8
2N5551
1 10K/0.2% 48.7K/1% 100 Q12
3
D4 D6 + D18
J2-M 6 - 1
26-48-1135 1N4148 1N4148 7 2 R61 R67
SIP1C - IC1A
5 +
R45 100K/0.1%
IC1B NE5532AN 68.1/1% 68.1/1%
- 8 SF14
10K/0.2% NE5532AN
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