Yamaha P1000S Service Manual page 29

QQ
3 7 63 1515 0
4. Preparation for BRIDGE mode
Attenuator
Input terminal
MODE switch
SUB WOOFER/LOW CUT switch
YS Processing switch
HPF switch
Load resistor
Connection for measuring: Measure the output at the point as shown below.
SPEAKERS
5. Inspection
5.1 gain
The output voltage shall be +22.1 +/- 1 dBu when input signal is 1 kHz, -10.0 dBu.
TE
L 13942296513
5.2 Frequency response
Input signals are each 20 Hz, 1 kHz and 20 kHz, -10 dBu.
The output voltage shall be 0.0 +/- 0.5 dB at 20 Hz, -0.5 +/- 0.5 dB at 20 kHz compared to the 1 kHz.
5.3 Distortion Factor
Input signals are each 20 Hz and 20 kHz.
The distortion shall be less than 0.1 % when output voltage as follows.
This inspection should have been finished within 30 seconds.
P1000S
28.28 V
5.4 Output Noise level
Shunt the input terminal with 600 ohms.
The noise level of output terminal shall be less than -60 dBu.
Next, set the input attenuator to MIN.
The noise level shall be less than -65 dBu.
6. Preparation of Delivery
Attenuator
MODE switch
SUB WOOFER/LOW CUT switch
YS Processing switch
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FREQUENCY
HPF switch
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"0" (MAX) Effective only channel A.
cannon connector 2PIN-HOT/3PIN-COLD/1PIN-GND
BRIDGE
OFF (except P1000S)
OFF (except P1000S)
OFF (P1000S only)
8+8 ohms +/- 1 %
A+
B+
P2500S P3500S
44.72 V 52.92 V
MIN
STEREO
OFF (except P1000S)
OFF (except P1000S)
25 Hz (except P1000S)
OFF (P1000S only)
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8
MEASURING
INSTRUMENT
INPUT
R 8 ohms
GND
R 8 ohms
Q Q
3 6 7 1 3
.
P1000S/P2500S/P3500S
9 4 2 8
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9
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