Yamaha XP7000, Руководство по обслуживанию

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XP7000/XP5000
39
3.15 MONITOR/REMOTE
3.15.1 Preparation
Connect the inspection circuit to the MONITOR/REMOTE terminal (JK304).
Check that the tolerance of the connected resistor is 1% or less, the rated power is 1/4 W or more and the tolerance of the DC
current voltage is 1% or less.
ID-V
XP5000
2.22
+/- 0.06 V
XP7000
2.00
+/- 0.06 V
3.15.5 Standby
Turn on SW4 and check that the POWER LED lights up in orange and the primary power is 5W or less.
5 V
SW4
SW3
SW2
SW1
180 ohms
1.5 k-ohms
330 ohms
180 ohms
7.5 k-ohms
7.5 k-ohms
15 pin
14 pin
13 pin
12 pin
11 pin
10 pin
MONITOR/REMOTE terminal JK304
7 pin
6 pin
5 pin
4 pin
3 pin
2 pin
1 pin
9 pin
8 pin
3.15.2 Output level
Input a 1 kHz, -10 dBu signal and check that the output voltage at pins 14 and 15 of JK304 is 4.8
±
1.0 dBu.
3.15.3 Mute and protection status
Input a 1 kHz, -10 dBu signal.
Check that the DC voltage at pins 10 and 11 of JK304 is +2
±
0.5V .
Turn on SW1 and check that the DC voltage at pin 11 of JK304 is 0.5 V or less and the voltage level at the output terminal of
the A channel is -30 dBu or lower.
Turn on SW2 and check that the DC voltage at pin 10 of JK304 is 0.5 V or less and the voltage level at the output terminal of
the B channels is -30 dBu or lower.
3.15.4 Model ID
Turn on SW3 and check that the DC output voltage at pin 3 of JK951 is within the range for “ID-V” specified in the table below.