Which Model of the VRX do you need? and/or what section
Hi,do you have the VRX6 420.1 schematic,esp the power supply section?I have a unit that producing some low level high pitch noise through each channel.Also I measure the dc-dc mosfet gate section is working at around 100kHz,is that the correct PWM frequency?
Thanks in advance!
The osc. freq. is OK this is PUSH/PULL topology.
2X36Khz = 72Khz. if it will be 110Khz then you have problem
Hi,the DC-DC converter is fine as per u said.
I notice that out of 6 LD1.2 module,only 1 is not making any noise,while the other 5 are generating some noise around 4kHz,which u can hear them with speaker connected even no input signal at all.
Could it be the module issue?Do you have the pinout diagram of it?
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