Measurement Conditions; Settings / Adjustments; Idling Current Adjustment - Electro-Voice P3000 Service Manual

P. EXTENSIONS optionally available 2 x input transformer NRS 90176
MEASURED SPECIFICATIONS: P3000 entire unit
Measurement conditions, unless differently specified:
• tolerance of measured values:
• measuring frequency:
• stated levels refer to:
• level controls set to their clockwise limits
• pin assignment of the XLR-type connectors:
• source resistance for the induction via the XLR-type connector:
• MAIN-PCB numbers relate to the models as follows:
• MAIN-PCB and POWER-AMP-PCB are provided with service connectors.
The Pin-assignment of these service connectors is as follows:
84157
CNSERV Assignment
1 Kodierung
2 BIAS Hot - Side +
3 BIAS Hot - Side -
4 Hot - Out
5 BIAS Cold - Side +
6 BIAS Cold - Side -
7 GND
8 floating voltage +
9 floating voltage -
1. Operating voltage:
depending on the model:
2. Deviation limit of the operation voltage:
3. Power consumption (both channels driven):
3.1. at idling condition
3.2. at standard operation (120W/4Ω)
3.3. at nominal condition (1200W/4Ω)
3.4. at 1/8 of the nominal power (150W/4Ω)
4.

Settings / Adjustments

4.1. IDLING CURRENT ADJUSTMENT

Connect the DC-volt meter at the BIAS measuring points (refer to table) and adjust the idling current via the trim
potentiometer (on the printed board assembly 84157). Adjust both channels of the power amplifier A&B.
Setting Measuring point 1
BIAS HOT A
BIAS COLD A
BIAS HOT B
BIAS COLD B
Type of unit
P3000 / 120 V
P3000 / 230 V
P3000 / 240 V
86207
86211
CNASERV
1
2
3
4
5
6
7
8
9
Measuring point 2
CNSERV 2 CNSERV 3
CNSERV 5 CNSERV 6
CNSERV 2 CNSERV 3
CNSERV 5 CNSERV 6
MAIN - PCB
86211
86207
86207
Assignment
Limiter A&B OFF
Service Limiter A
-15V
GND
+ 15 V
heat sink temperature
A&B
+ U1 front-end A
- U1 front-end A
coding
U(B) = 120V/ 230V/ 240V
50Hz ... 60Hz
±10%
P(B) = 180 - 260 W
P(B) = 1500 W
P(B) = 4100 W
P(B) = 1650 W
U (DC)
15 mV
15 mV
15 mV
15 mV
3
∆X = ±1.5 dB
f = 1 kHz
U = 775 mV (0 dBu)
PIN 1: GROUND
PIN 2: + INPUT
PIN 3: - INPUT
R(Q) = 50 Ω
86207
86211
CNBSERV Assignment
1
2 Service Limiter B
3 - 15 V
4 Fan voltage
5 Service Fan
Switch
6 Service Fan
Switch
7 + U1
front-end B
8 - U1
front-end B
9 coding
BIAS trimmer
VR1
VR2
VR1
VR2
n.c.