Hi all,
I have a 300/4, board rev1 that's had a very poor repair job done. I have everything else squared away except these two resistors. Can anybody help me identify resistor values and/or part numbers for R536(top left) and R508(bottom right). Apparently the reapair facility was out of smd resistors that day. Both installed were 10 Ohm. I'm 99% sure R508 is a 10 Ohm, no clue on the other.
Thanks!
Kevin
I have a 300/4, board rev1 that's had a very poor repair job done. I have everything else squared away except these two resistors. Can anybody help me identify resistor values and/or part numbers for R536(top left) and R508(bottom right). Apparently the reapair facility was out of smd resistors that day. Both installed were 10 Ohm. I'm 99% sure R508 is a 10 Ohm, no clue on the other.
An externally hosted image should be here but it was not working when we last tested it.
Thanks!
Kevin
Thanks again Perry!
What size are these larger resistors? I ordered
CRM2010-JW-4R7ELF Bourns | Mouser
And
CRS2010-FX-10R0ELF Bourns | Mouser
For these this morning. Are these correct?
What size are these larger resistors? I ordered
CRM2010-JW-4R7ELF Bourns | Mouser
And
CRS2010-FX-10R0ELF Bourns | Mouser
For these this morning. Are these correct?
Yes the above links were correct parts, size 2010 fits
I am still having distorted audio out of the right front channel though, after replacing power supply FET's with resistors and output FET's with resistors. I'm having trouble choosing a replacement for a 6.8V zener diode on the driver board (which likely went bad when my meter lead shorted pins 2&3 of the driver board)
How do I determine the zener current and reverse current for the replacement part? or do you happen to have a part number handy that will work here?
I am still having distorted audio out of the right front channel though, after replacing power supply FET's with resistors and output FET's with resistors. I'm having trouble choosing a replacement for a 6.8V zener diode on the driver board (which likely went bad when my meter lead shorted pins 2&3 of the driver board)
How do I determine the zener current and reverse current for the replacement part? or do you happen to have a part number handy that will work here?
Maybe original?
http://www.codingintl.com/pdf/datasheet/Diodes/dzd.pdf
find something equal or better.
http://www.codingintl.com/pdf/datasheet/Diodes/dzd.pdf
find something equal or better.
FIXED!
I replaced the zener diode labeled 6.8Y on the driver board with this part: BZX84B6V8LT1G.
BZX84B6V8LT1G ON Semiconductor | Mouser
I also removed all 4 driver boards and added solder, de-soldered and then re-soldered all surface mounted devices as Perry describes in other posts. During this process I found a 1K resistor on a separate channel that had separated at the end cap, which definitely saves me a future repair on this amp.
I replaced the zener diode labeled 6.8Y on the driver board with this part: BZX84B6V8LT1G.
BZX84B6V8LT1G ON Semiconductor | Mouser
I also removed all 4 driver boards and added solder, de-soldered and then re-soldered all surface mounted devices as Perry describes in other posts. During this process I found a 1K resistor on a separate channel that had separated at the end cap, which definitely saves me a future repair on this amp.
Thanks for all the help Perry! If it weren't for Basic Car Audio Electronics and your previous/current posts I would have definitely bricked this perfectly good amplifier. Please let me know the best way I can pay you for your knowledge, experience and time.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- General Interest
- Car Audio
- JL Audio 300/4 resistor values needed