ppi 2300.2 broken

[MIKETRU]

UI-0 ( IC REGULATOR)

2-3 LEG (1-2 LEG ARE DIFF)
Q4-98
Q5-.7 (6488 CLOSEST TO BURNED RESISTORS)
Q6-.9

Q8-.9
Q9-1.0
Q10-.6 (6491CLOSEST TO BURNED RESISTORS)

U8-0 (IC REGULATOR)


Q45-2.0
Q46-1.7 (6488 OTHER SIDE)
Q47-2.1

Q50-96.
Q51-.6 (6491 OTHER SIDE
Q52-96.

 

[Perry Babin]

2-3 LEG (1-2 LEG ARE DIFF)
Q4-98
****Seems to have an open emitter resistor (large resistor connected to leg 3)

Q5-.7 (6488 CLOSEST TO BURNED RESISTORS)
**** This one is probably shorted.

Q6-.9
**** Q5 is likely making this one look shorted.


Q8-.9
**** Q10 is likely making this one look shorted.

Q9-1.0
**** Q10 is likely making this one look shorted.

Q10-.6 (6491CLOSEST TO BURNED RESISTORS)
**** This one is probably shorted.

U8-0 (IC REGULATOR)


Q45-2.0
**** Q46 is likely making this one look shorted.

Q46-1.7 (6488 OTHER SIDE)
**** This one is probably shorted.

Q47-2.1
**** Q46 is likely making this one look shorted.

Q50-96.

Q51-.6 (6491 OTHER SIDE
**** This one is shorted. It's emitter resistor is probably open.

Q52-96.



All of the outputs will need to be replaced as well as the emitter resistors, a few of the smaller resistors and probably a few driver transistors.

Measure the resistance from the first to second leg of the power supply FETs (IRFZ44?). If any read ~0 ohms, the FETs have very likely failed.

 

[MIKETRU]

IM back

Hey perry, i had oyher things going on.I got the replacement resistor(small tan w/br-bl-br-gold)now i need the big ones they are blue.How can i locate them exactly? mouser dosnt show them.Blue w/red red silver gold.

 

[Perry Babin]

71-CW2B-0.22

These aren't blue but should be a good sub. Confirm that the dimensions are correct before ordering.

 

[MIKETRU]

should i get 5% or 10% tolerance

 

[Perry Babin]

I didn't notice that they were 10%.

These will work if they're the correct physical size:
72-RWM410-R22-5