JVC RX-D201 - Drive IC and Waveform Analysis

Check Drive IC IRS20124S-X
1.8 3.84
4.8 0.32
30.9 29
40.9 29
34.7 29
0V (AMP-B)
3.03
3.02
2.84
1.02
10.7
AMP-B
(-30.9V)
AMP+B
(+32.1V)
M CLOCK
M CLOCK
The voltages marked on IC251 pins are refer to ‘AMP –B’; the blue color is under normal condition, the
red color shows the different when 2 MOSFET are de-soldered. (This is front L/R channels, the DC
level at pin2/4 are different on other 5 channels; on RX-D702, these DC voltages are different too)
AMP-B_ +12V (-10.6V)
M CLOCK
M CLOCK
M CLOCK
70V P-P
10V P-P
10V P-P
4.2V P-P