Yamaha EMX5016CF Service Manual page 9

EMX5016CF
8
Check the waveform.
116
B
Turn the power on.
Note: Do not short-circuit the oscilloscope chassis with the chassis of this unit when checking the waveform.
Check the waveform between pin 4-5 (GND-LVG) of IC402
13.9 µS
(71.94kHz)
Check the waveform between emitter and collector of Q407 (IGBT)
C
D
Check the rectangular wave.
Period: approx. 14 µ S (approx. 70kHz)
Amplitude: approx. 15 Vp-p
(Probe GND: IC402 Pin 4)
Check the rectangular wave.
Period: approx. 14 µ S (approx. 70kHz)
Amplitude: approx. 338 Vp-p (U)
approx. 320 Vp-p (H/B/O)
approx. 338 Vp-p (A)
Amplitude may vary depending on the primary
side.
(Probe GND: Q407 emitter)