Here's a pic of one of the PCB's in my Exposure IV (Dual Mono) amp.
Both channels now 'repaired'...but noticing some resistor value discrepancies between the channels, at the following points : R15, R16, R19 and R20 ...these weren't part of the repairs BTW.
Want to be sure I've got the correct values...so both channels can be properly identical.......Oh, and there seem to be no schematics out there.🙁
I'm actually trying to reverse engineer (with some help! 🙂 ) a schematic for this...so the right values would help.
Hoping someone with same PCB (I'm told the same PCB is in model VIII??) might take a peek and report back please??
It would also be great to identify the correct relay that the PCB was intended to accommodate.....mine are both on 'flying leads!
Anyone 'out there' please??
Both channels now 'repaired'...but noticing some resistor value discrepancies between the channels, at the following points : R15, R16, R19 and R20 ...these weren't part of the repairs BTW.
Want to be sure I've got the correct values...so both channels can be properly identical.......Oh, and there seem to be no schematics out there.🙁
I'm actually trying to reverse engineer (with some help! 🙂 ) a schematic for this...so the right values would help.
Hoping someone with same PCB (I'm told the same PCB is in model VIII??) might take a peek and report back please??
It would also be great to identify the correct relay that the PCB was intended to accommodate.....mine are both on 'flying leads!
Anyone 'out there' please??
Attachments
Last edited:
You are posting NO values, how should we know?
And in any case the schematic is not known.
The main point: do they work?
If so, leave as is.
I did say that the schematic wasn't available!🙂
OK....values....board to board are:
The amp has had a colourful past...at least one of the boards has been worked on.
Just trying to discover original values...from a hopefully 'un-molested' board.
OK....values....board to board are:
R15
RIGHT - yellow/violet/black = 47 Ohm
LEFT - yellow/violet/brown = 470 Ohm
R16
RIGHT - red/violet/brown = 270 Ohm
LEFT - yellow/violet/black = 47 Ohm
R19
RIGHT - brown/black/brown = 100 Ohm
LEFT - yellow/violet/brown = 470 Ohm
R20
RIGHT - yellow/violet/brown = 470 Ohm
LEFT - red/violet/brown = 270 Ohm
The amp has had a colourful past...at least one of the boards has been worked on.
Just trying to discover original values...from a hopefully 'un-molested' board.
Last edited:
post pic of the copper side of the board,
show us what the 6 pins are connect to.
post the other amp's pic.
show us what the 6 pins are connect to.
post the other amp's pic.
Hi Alexchoi...and thanks for suggestions...I know there are members with a lot of skill out there! 🙂
Still looking however, for someone 'out there' who might post a pic of an 'un-molested' Exposure IV board...as in my post #1.....feel that this is the best way forward for me!
Still looking however, for someone 'out there' who might post a pic of an 'un-molested' Exposure IV board...as in my post #1.....feel that this is the best way forward for me!