Yamaha XP1000 Service Manual page 29

3.15.4 Model ID
When the SW3 is turned on, the DC output voltage of 3pin of JK304 shall be within the range specified in the "ID-V"
of following table.
ID-V
3.15.5 Standby
When the SW4 is turned on, the POWER LED light up to orange and the primary electrical power shall be less than 5W.
4. Preparation For BRIDGE mode
Attenuator "0"(MAX) Effective only channel A.
Input terminal Cannon type connector: 2PIN-HOT/3PIN-COLD/1PIN-GND
MODE switch BRIDGE
GAIN switch 32 dB
HPF switch OFF (Both Cannel)
Load resistor 8 ohms + 8 ohms +/- 1 %
For items of BRIGE mode, the input signal shall be applied only to input terminal of channel A.
It must be applied to input terminal of channel B.
Connection for measuring: Measure the output at the point as shown below.
5. Inspection
5.1 Gain
The output voltage shall be +28.0 +/- 1.0 dBu when input signal is 1kHz, -10.0 dBu.
5.2 Frequency response
Input signals are each 20 Hz, 1kHz and 20 kHz, -10 dBu. The output voltage shall be -0.5 +/- 0.5 dB at 20 Hz and 20 kHz
compared to the 1kHz.
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.
XP1000
56.58 V
5.4 Output Noise level
Connect between the input terminals (2pin-hot and 3pin-cold) by 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. DIN AUDIO filter shall be used for the measurements.
6. Factory Settings
Attenuator MIN (Both Cannel)
MODE switch STEREO
GAIN switch 32 dB
HPF switch OFF (Both Cannel)
XP1000 XP2500
2.97 2.73
+/- 0.06 V +/- 0.06 V
XP2500 XP3500
89.46 V 105.84 V
XP3500
2.50
+/- 0.06 V
XP1000/XP2500/XP3500
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