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Forum Monitor
Schematics
Klark Teknik Building
Walter Nash Road
Kidderminster
Worcestershire
DY11 7HJ
Tel: +44 (0) 1562 741515
Fax: +44 (0) 1562 745371
Email: [email protected]
Website: www.ddaconsoles.com
Forum Monitor Schematics
Telex Communications (UK) Limited
In line with the company's policy of continual improvement, specifications and function maybe subject
to change without notice. This Operator Manual was correct at the time of writing. E&OE.
+48V +48V MIC INPUT MIC/LINE GAIN 0 REVERSE HIGH PASS FILTER
SW1 VR1A MIC/LINE
R1 5KRD LED1 LED1 LED2 IC2B 100U 16V
2 1 5 C10 18dB/OCTAVE, 80Hz
7
C1 470R GRN 6 R40
2U2 3 SW3 TL072 LED2 LED3
63V R35
R11 C9 220K 10K EQ
R3 2PSUJ 10R 33P C11 0 REV LED2
R2
C7 R33 R48
6K8 6K8 R34
1000U R14 SW4
R4 LK1 C2 6.3V 4 33P HIGH PASS RED
3K3 1K5 R38 V- 15K SW6 INSERT
MIC 7K5 6 C12 SW5
CON5 1K8 10R D1 R12 R39 4 C13 C14 SEND
33U
VR1B IC3A IC3B NE5532
12V v1+ 100K R36 1K5 2 5 C15 C29 R74
1 63V
R8 5KRD IC7B
5 1 100U 7 5 R76 C32
2 12K
T1 (OPT) 10K 3 16V 100N 100N 6 7 1 CON2
3
SW2 NTM1 62R TL072 2PSUJ R47 TL072 220N 100U 10K 6
7
3WAY D2 1 4PSUJ R37 8 R41 10K 2PSUJ 16V 75R 100U 2
WIR 8 2 12V 3 8 C8 3K9 10K 16V 3
R49
R10 C4 6 V+ R50 2PSUJ R73 R79
30K
-20dB 24K 220P 2 5 10K 10K C31 10K 4
R7 (OPT)
100U
SSM2017
6 4 2K2 D3 16V MIC GAIN = 0 TO 10dB R77 5
IC1 R13
1 12V LINE GAIN = -10 TO +20dB 33P 1/4JACK
4 10K
2PSUJ
R75 10K
R6
R9
v1- 10K
SPLIT 360R
12K
D4 C30 R80
CON6 12V GAIN = 10 TO 60dB 33P 75R
R78
1
R5 LK2 C3 VR2 METERINPUT
2
R51 10KB R52 R55 R56 R59 R60 C18 INSERT
3
2 1 10K
3WAY 1K8 10R 33U RETURN
MH 63V 1K5 1K5 10K 10K 10K 10K 470N
R15 3 VR3 V2+ 1 CON3
V- V- R63 10KB R64 IC7A 12K
V+ R173 V1+ C16 2 1 8 NE5532 R81 2
100R 3N3 4 4 C42 3 3
IC4A IC5A
R53 R54 2 2 1K2 1K2 1
C5 10R C58 1 1 3 2 4
22U 3 3 100U
47K C17 47K TL072 V+ R175 V2+ 16V 4 5
25V TL072 R82
10N 8 8 C19 12K 1/4JACK
470N R66 V2-
33P V+ V+ 10R C62 C41
IC4B
C59 6 22U
R174 22U 7 C21 47K 25V
25V 5 1 4 1 4 33P
LINE INPUT TL072 R84
V- 10R V1- 3
6 6
3 33P R83 C40
V1+ R65 C63 12K 33P
LINE 6
IC5B
C22 R176 22U 12K
100U C24 C26
R20 8 2 5 2 5 7 25V
IC2A 16V
CON4 1 3 VR4A VR4B VR6A VR6B 47K 5
C39
100KC 100KC 2N2 100KC 15N
1 100KC TL072 100U V- 10R V2-
12K
2 2 16V
TL072
3
R21 4 R25 R27 R57 R58 R61 R62 R67
3K3 3K3 3K3
4 3K 10K 3K3 10K
V1- C38 2 2
5 12K C23 C25
1/4JACK 3 3
R24 33P
VR5 VR7
4N7 10KB 33N
10KB
1 1
R22 3K R26 V3+ DIRECT
3K 1K
LK3 R90 8 OUT
NE5532
C37 1 2 3 R92 C36
33P 1 1 CON1
LINK-OPT 10K 2
R23 LINK FOR -10dBV IC6A 75R 100U 2
3K V+ R177 V3+ 4 16V 3
R95
V3- 10K 4
10R C64
22U 5
25V C35 1/4JACK
R93
33P
C65 R96
R178 22U R91 10K 75R
LED4 LED5 25V 10K
C34
V- 10R V3- 33P
PIN R94
CON7 ON
3WAY LED4
10K
3 2 1
METERINPUT GRN
SW10
V+LED FADER BUFFER R113 R114