Preparation For Bridge Mode - Yamaha P5000S Service Manual

P5000S/P7000S
4.

Preparation For BRIDGE mode

Attenuator
Input terminal
MODE switch
SUBWOOFER/LOW CUT switch : OFF
YS Processing switch
Load resistor
Connection for measuring
SPEAKERS
TERMINAL
A+
B+
5. Inspection
5.1 gain
The output voltage shall be +22.1 +/- 1dBu when input signal is 1kHz, -10.0dBu.
5.2 Frequency response
Input signals are each 20Hz, 1kHz and 20kHz, -10dBu.
The output voltage shall be 0.0 +/- 0.5dB at 20Hz, -0.5 +/- 0.5dB at 20kHz compared to the 1kHz.
5.3 Distortion Factor
Input signals are each 20Hz and 20kHz.
The distortion shall be less than 0.1% when output voltage as follows.
This inspection should have been finished within 30 seconds.
P5000S P7000S(J/U/V/A/T) P7000S(H/W/B/K/O)
63.25V
38
:"0"(MAX) Effective only channel A.
: cannon connector 2PIN-HOT/3PIN-COLD/1PIN-GND
: BRIDGE
: OFF
: 8+8 ohms +/- 1%
: Measure the output at the point as shown below.
MEASURING
INSTRUMENT
INPUT
R
8 ohms
GND
R
8 ohms
74.83V 72.11V