JBL PRX series auto-off disable?
- Thread starter Andrew Broughton
- Start date
Hi.
The input module has an OpAmp circuit that senses the signal level and translates it to a positive voltage in the correspondent CPU pin, so it can control the obnoxious power saving option of this particular batch of PRX700 Series. As I have not any one of these at hand by now, I can't measure the max voltage level necessary in the pin SDETECT to keep the system alive and performing, but doubling R44 and R48 resistor values to 220K Ohm and C57 to 0.33uF will improve sensibility in the OpAmp (+) input pin and it will keep its output on Hi level with smaller signal fed to the loudspeaker, so the CPU senses the audio input as active and keeps the amp enabled with lower levels of input signal.
I attached a section of that circuit to locate the parts in the Input board.
I have a PRX715 that I would like to disable the shut down, could you send me a copy of the schematic? [email protected] Thanks!
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Might try a forum DM to Danny Avila, he still pops in to read. Carlos, though, hasn't been back for about 9 months.
Might try a forum DM to Danny Avila, he still pops in to read. Carlos, though, hasn't been back for about 9 months.