![background image](http://html.mh-extra.com/html/yamaha/p1000s/p1000s_service-manual_895158028.webp)
P1000S/P2500S/P3500S
28
3.10 Stability
The rectangle wave of 10kHz at -10dBu is inputted.
Connect only capacitance of 0.01uF(Polyester film capacitor)
to output terminal.
The overshoot and the ringing should be as follows.
Overshoot
Vp/Vo < 2.5
Ringing
within 7 waves and no oscillation
3.11 Protection circuit for DC fault
Disconnect of load resistor from output terminal.
PROTECTION LED shall not light up when input signal is 10 Hz, +9.0 dBu.
PROTECTION LED shall light up less than 2 seconds when input signal is 1 Hz, +5.0 dBu.
The LED shall light off less than 10 seconds when the input signal was cut.
3.12 Efficiency
(1) The primary electrical power shall be as follows when input signal is 1 kHz, -6.6 dBu.
(2) The primary electrical power shall be as follows when shunt the input terminal with 600 ohms.
3.13 VI limiter and compressor
Connect 1 ohm(+/- 5 %) load resistor to output terminal.
Input signal is 1 kHz, -1.5 dBu.
The output voltage shall be as follows and the distortion shall be less than 5 %.
Then, CLIP LED shall light up.
This inspection should have been finished within 30 seconds.
3.14 SIGNAL LED
SIGNAL LED shall lights up when input signal is 1 kHz, -23 dBu.
P1000S
P2500S
P3500S
130 +/- 20 W
130 +/- 20 W
130 +/- 20 W
P1000S
P2500S
P3500S
15 +/- 10 W
20 +/- 10 W
25 +/- 10 W
P1000S
P2500S
P3500S
6.5 +/- 3 V
13 +/- 3 V
16 +/- 4 V
Vo
Vp