Hello, i received a alpine pdx m6 sub amp.. Repaired the filter caps, because broken. Nothing more. Amp powers up, 1,08Amps idle.
Oscilation at output perfekt. Traced input signal from input preamp board to mainboard, also perfect... Must be something between drive ic and mainboard. Expect a broken resistor.
Cant find something. Anyone has a diagram, or had this failure before?
Oscilation at output perfekt. Traced input signal from input preamp board to mainboard, also perfect... Must be something between drive ic and mainboard. Expect a broken resistor.
Cant find something. Anyone has a diagram, or had this failure before?
I have a manual but can't post it.
The MRV-M500 is very similar.
Are you getting a square wave drive signal into the input terminal of the driver IC?
Is it modulated when you drive audio into the amp?
The MRV-M500 is very similar.
Are you getting a square wave drive signal into the input terminal of the driver IC?
Is it modulated when you drive audio into the amp?
on both drive ic at pin 3 no signal.
Both pins are tied to ground or bat -.
Do i have the correct pin? Should be a IRS20956S
Both pins are tied to ground or bat -.
Do i have the correct pin? Should be a IRS20956S
Last edited:
cant edit my thread,
no modulation, only sinewave until the back of the mainboard. There are two areas for each drive ic. Both resistor areas got the sine wave. One area got a slightly disorted sinewave.
no modulation, only sinewave until the back of the mainboard. There are two areas for each drive ic. Both resistor areas got the sine wave. One area got a slightly disorted sinewave.
yes, i have downloaded it... Ok Pin 5 drive ic 1 very weak amplitude.,. Drive ic 2, no drive signal... I will try to use the diagram to trace it back.
IC 3001 Pin 7 sine wave, Pin 1 small AMplitude. It seems, that ic 3001 allready become a bad signal injected
IC 3001 Pin 7 sine wave, Pin 1 small AMplitude. It seems, that ic 3001 allready become a bad signal injected
Without Signal Connected, Pin 2 and 3 at ich 3001 ,No Signal..at 5 and 6 also No Signal But minus 10v.. as soon as i Connect audio,and disconect again, i have a Signal staying at Pin 2 and 3, but it doesnt aftect Pin 1which means bo Output...
Attachments
Which is the other part?
IC3101 is given as a BA4580RF in the parts list but is shown as an SE5532AD on the diagram.
Also check R3127.
IC3101 is given as a BA4580RF in the parts list but is shown as an SE5532AD on the diagram.
Also check R3127.
ZD3101 48E41408S01 DIO,ZENER MMSZ4684T1
Q3103 48E41424S01 TR, UMT2N
Do you have a revision number on your amp? The manual I have appears to have a different layout.
Q3103 48E41424S01 TR, UMT2N
Do you have a revision number on your amp? The manual I have appears to have a different layout.
