Dear Friend, I have many jbl prx-715 series, they used pascal as amp. we have problem with the amps. all problem because the smps power failure.
some amps make the amp control is broken..the ic is pas02. I'm trying to find replacement part and trying to contact pascal but they can't supply this part.
can some one help me what is the real ic code for this part?? I think this part is hidden and the change the type to pas02.
this part amp control for 2 irs20975s.
some amps make the amp control is broken..the ic is pas02. I'm trying to find replacement part and trying to contact pascal but they can't supply this part.
can some one help me what is the real ic code for this part?? I think this part is hidden and the change the type to pas02.
this part amp control for 2 irs20975s.
Attachments
This is a microcontroller, almost surely PIC or Atmel. The code in this MCU is proprietary. There are undocumented lines in the ribbon cable connector for programming the MCU.
The code is not very complex, it just controls the PSU power command depending on rail voltage drop, it senses mains line voltage from secondary side of transformer, it detects excess HF signals shutting down the amplifier, and a few more things.
I don't think this IC can become easily damaged due to SMPS failure.
EDIT: This web search reveals that JBL PRX-715 (no longer for sale) uses a 750W+750W Crown class-D module.
jbl PRX-715 crown - Bing
The code is not very complex, it just controls the PSU power command depending on rail voltage drop, it senses mains line voltage from secondary side of transformer, it detects excess HF signals shutting down the amplifier, and a few more things.
I don't think this IC can become easily damaged due to SMPS failure.
EDIT: This web search reveals that JBL PRX-715 (no longer for sale) uses a 750W+750W Crown class-D module.
jbl PRX-715 crown - Bing
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Hi! Joeanes, could you name the ic 8 soic, gate driver place psu side, I'm trying to repair my sub, the ic in question has exploded on top. thank you.
The 8 pin IC is a 600V high and low side gate driver. IRS2181 I guess.
Check also PSU control IC UCC2893, and buffer transistors, which used to be FMMT718.
btw: This PSU design is amateur, Chinese-grade crap. A Power-over-Ethernet control IC was thrown at the PCB, intended for DC-DC 48V SMPS. The datasheet circuit was scaled up and fed from rectified mains, input impedance is negative, it draws sharp peaks of current at begin and end of cunduction, it is not a PFC (although it passes PFC, but a conventional rectifier also does at 200W). It does not have overvoltage protection. When line voltage bounces high, internal amplifier supply voltage bounces high, and load is suddenly high, it pops. It is designed to fail leaving unrecognizable parts. This type of product is intended to *prevent* learning of DIYers.
Check also PSU control IC UCC2893, and buffer transistors, which used to be FMMT718.
btw: This PSU design is amateur, Chinese-grade crap. A Power-over-Ethernet control IC was thrown at the PCB, intended for DC-DC 48V SMPS. The datasheet circuit was scaled up and fed from rectified mains, input impedance is negative, it draws sharp peaks of current at begin and end of cunduction, it is not a PFC (although it passes PFC, but a conventional rectifier also does at 200W). It does not have overvoltage protection. When line voltage bounces high, internal amplifier supply voltage bounces high, and load is suddenly high, it pops. It is designed to fail leaving unrecognizable parts. This type of product is intended to *prevent* learning of DIYers.
Hello everyone, Eva thank you for your help, I will let you know, how it will end.
many greetings
many greetings
