Crest 4801 set, 21D1777 User Manual
8
7
02-10-94
CHANGE R101,R109 FROM 10K TO 4.7K.
CHANGE R103,R111 FROM 2.2K TO 2.7K.
CHANGE R107,R115 FROM 3.3K TO 4.7K.
CHANGE R108,R116 FROM 2.2K TO 1K.
CHANGE Z101,Z102 FROM MLL4728 TO MLL4733.
6
5
4
3
2
1
TEMP 'A'
R123
R11
5K/5W
MAC97A
10K
9
+
8
-
R124
10K
R125
10K
11
+
10
-
R126
10K
D107
1N4004
D108
1N4004
D109
1N4004
D110
1N4004
R7
100K
LED 3
SIGNAL
PMBT5551
D9
C1
1N4148
1/50V
TR1
470/6.3V
C8
100/25V
R101
14
4.7K
IC101C
LM339M
R109
13
4.7K
IC101D
LM339
R9
2.7K
Q3
LED 1
CLIP
C3
MLL4742
IGM 'A'
D D
CLIP 'A'
R119
10K
R122
R118
100K
312
A/CLIP
5
+
2
4
-
IC101A
LM339M
220
+24V
R117
2.2K
R121
10K
C C
34 V. AC
3A/MINI
F1
BR1
RS202
C6
34 V. AC
470/50V
Z3
MLL4728
R46
47K
C10
2.2/100V
R47
M5
15
CLIP CH. A
CONTROL V. CH. A
B B
LIMIT CH. A
SPKR. RAIL CH. A
MUTE CH. A
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND
GROUND
GROUND
GROUND
TRANSFORMER TEMP GND
TRANSFORMER TEMP
14
13
12
11
10
9
8
7
6
5
4
3
2
1
26-48-1155
10K/1W
3
R50
2
2.2K
R3
NOTE 2:
10K
D3
1N4148
R120
100K
B/CLIP
7
+
1
6
-
IC101B
LM339M
0.1/50V
C105
0.1/50V
C104
CLIP 'B'
R42
R5
10K
2.7K
84
+
1
-
IC2A
LM393M
D5
1N4148
D7
1N4148
Q1
PMBT5551
R13
10K
84
3
+
1
2
-
IC102A
LM358AM
R102
4.7K
D102
1N4148
5
+
7
6
-
IC102B
LM358AM
R110
4.7K
D105
1N4148
VDDA
VDDB
VEEA
VEEB
R45
VR3
250
Z1
45.3/1%
499/1%
R44
D11
1N4148
R105
100
C101
1/50V
R103
2.7K
R107
4.7K
TEMP 'B'
C102
1/50V
R111
2.7K
R115
4.7K
Z101
R108
1K
MLL4733
R113
100
R116
1K
MLL4733
PROT 'A'
DATA 'A'
C103
0.1/50V
Z102
PROT 'B'
DATA 'B'
A/DATA
AUX GND
B/DATA
A/+16V
B/+16V
A/-16V
B/-16V
DATA & POWER CONN.
26-48-1075
1
2
3
4
5
6
7
J5
IGM 'B'
0.1/50V
MLL4742
NOTE 3
R8
PMBT5551
Q4
100K
D8
1N4148
C4
C5
R10
2.7K
LED 2
CLIP
R52
470/6.3V
Z2
100/25V
D10
R6
2.7K
PMBT5551
Q2
LED 4
SIGNAL
C2
1/50V
R12
5K/5W
TR2
MAC97A
C7
R43
10K
NOTE 2:
D2
1N4148
Z4
MLL4728
R48
47K
C11
2.2/100V
R49
10K/1W
R4
10K
26-48-1155
M6
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
44 V. OUT 24 V. IN
SIGNAL CH. B SIGNAL CH. A
CLIP CH. B
CONTROL V. CH. B
LIMIT CH. B
SPKR. RAIL CH. B
MUTE CH. B
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND.
GROUND
RELAY GROUND
RELAY GROUND
RELAY 1,3
RELAY 2,4
IC2B
LM393M
5
+
7
R53
6
-
2.2K
D6
D4
1N4148
1N4148
R14
10K
1N4148
LED 7
26-48-1035
D13
ACTIVE
1N4148
M7
3
2
1
VR1
5KB
R15
2.7K
LED 5
TEMP/DC
R17
2.7K
1
IC1A
LM614WM
R38
100K
R25
4.7K
MPSA75
Q5
R27
A A
8
7
390
R19
5.1K
-
2
+
3
4 13
1N4148
R29
10K
1N4148
R21
D15
7
IC1B
LM614WM
D17
R23
1K
750/1%
8
LM614WM
R35
499/1%
R33
4.7K
13
IC1E
9
R37
2.2K
D19
1N4148
-
6
+
5
R31
390K
6
499/1%
R24
750/1%
D18
1N4148
R36
R34
4.7K
R22
1K
D14
-
11
10
+
12
IC1C
1N4148
LM614WM
R32
390K
D16
1N4148
5
R20
5.1K
14
15
R39 100K
R30
10K
+
-
IC1D
LM614WM
26-48-1035
M8
3
2
1
LED 6
TEMP/DC
R18
2.7K
ACTIVE
R16
2.7K
LED 8
1N4148
D12
VR2
5KB
16
R26
4.7K
Q6
MPSA75
R28
390
4
NOTE 1: R3, R4 NOT INSTALLED
RESERVED FOR FUTURE USE
NOTE 3: R52 USED FOR FIXED SIGNAL PRESENSE THRESHOLD
3
CREST AUDIO
100 EISENHOWER DRIVE
PARAMUS, NJ 07652
Title
MA5850 DISPLAY WITH NEXSYS
Size Document Number Rev
21D1777
D
2
Date: Sheet of
0 0Friday, May 19, 2000
1
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