Memphis 16-pr1x1000 help

[rhempz01]

perry do you know where or a replacement for the q111, KRA121S P8 SOT23 PNP epitaxial planar transistor.

 

[Perry Babin]

Are you sure it's defective?

 

[rhempz01]

not positive just burnt, and the resistor was still withing tolerance, The top pad (single leg of the p8) other than to the resistor? not connected is however i replaced it. i have replaced the ic and drivers and all outputs, when i put it on resisted current, i get while on chassis ground, i cant seem to get the correct readings?? they change, i really need help...
Q206 1:-11.92v 2: 3.42v 3: -14.56v
Q207 same
Q107 " "
Q106 " "

Q205 1: 4.83v 2: 15.98v 3: 7.84v
Q206 " "
Q104 " "
Q105 " "

 

[rhempz01]

i changed the regulator the resistor is within tolerance, i dont have the kia 7815af yet, i have some of those small capacitors that are 20% 100uf 16v? im not sure how i can test them or the kia component. i have not tested for audio as of yet, i didnt leave it powered up long.

 

[rhempz01]

I switched that kia7815 and put the p8 chip back in the amp and it is producing audio now static audio but audio.

 

[rhempz01]

Can someone please tell me which surface mount diodes are is locations d111 and d110, a capcitor blew while heating the chip and blew them from the board. I have some in stock but can tell which value is used where.

 

[Perry Babin]

If no one has any definitive answer for you, they are likely 1N4148 type diodes. There are two zeners in the area but they are marked 5v6.

 

[rhempz01]

Thanks Perry.

 

[rhempz01]

does anyone know what cap is used in location bd01.

 

[Perry Babin]

Point it out in a photo.

 

[rhempz01]

This small smd capacitor.

 

[rhempz01]

This small smd capacitor. And what was there was grey or black no marking looked like a capacitor. Anyway it feel out when installing the drivers. And I lost it now I don't know what it was or supposed to be.

 

[rhempz01]

Far right corner

 

[rhempz01]

I'm thinking it was a resistor upside down?

 

[Perry Babin]

Is there a similarly marked component adjacent to the driver for the other outputs?

 

[rhempz01]

no, thats the first thing i looked for also.

 

[rhempz01]

no, thats the first thought i had as well.

 

[rhempz01]

it has no power on the gates or ps fets straight in to protect.

 

[Perry Babin]

I'm sorry but I have no further information on that part.

 

[rhempz01]

I got a new board for a early repair I never completed. All the mosfets and trace was ripped from the board. I nightmare of repairs. So I installed everything 3205's in the ps. it was up and running great, alone. Installed the the output transistors 3amps of current. New drivers and a ir52092s, brought the current down. But I have a -4.5vdc on the speaker output.?