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MEASUREMENT SPECIFICATIONS: DPA power amplifiers
complete appliance
Names of the individual printed board assemblies and their corresponding EDP numbers:
EDP numbers of the main boards
DPA 4245
DPA 4260
84 188
84 189
Board section
Index
Main PCB
1
Supply PCB
4
LED PCB
3
Input-PCB (index 1) and Output-PCB (Index 2) are located on the printed board assembly 81340.
Measuring conditions, unless differently specified:
- measuring tolerance:
X
= 1.5dB
- measuring frequency:
f
= 1kHz
- all stated levels refer to:
U
= 775mV (0dBu)
- level controls are set to their clockwise margin:
- XLR connector pin-assignment:
PIN 1
= GROUND/SHIELD
PIN 2
= + INPUT
PIN 3
= - INPUT
- source impedance for the induction via the XLR-type connector:
R(Q) = 50 ohms
- the AMPLIFIER PCB is provided with service connectors:
CNS1
CNS2
CNRC
PIN
Assigned to
PIN
Assigned to
PIN
Assigned to
1
-Vcc
1
LIM A Switch
1
LIM Out A
2
BIAS +A
2
-15V
2
LIM Out B
3
BIAS -A
3
LIM B Switch
3
Standby via RC
4
FAN Voltage
4
+15V
4
Standby LED
5
+Vcc
5
AGND
5
-Vss
6
BIAS +B
6
Speaker Out A
6
+Vss
7
BIAS -B
7
Relay/Protect
7
n.c.
8
Temp Heatsink
8
Speaker Out B
8
n.c.
- Pin-assignment of the power amplifiers output connector:
PIN
Function
Channel
1
+ pole of the 100V output and + pole of the 25V output
2
- pole of the 25V output and + pole of the 70V output
3
- pole of the 70V output and - pole of the 100V output
B
4
+ pole Direct Output
5
- pole Direct Output
6,7
not assigned
-
8
- pole Direct Output
9
+ pole Direct Output
10
- pole of the 70V output and - pole of the 100V output
A
11
- pole of the 25V output and + pole of the 70V output
12
+ pole of the 100V output and + pole of the 25V output
Pin-assignment of the Power Remote connector:
PIN 1 control voltage -
PIN 2 control v
