I have finally got my protection board working but I lost the 2 seconds delay when powering up the amp from the back panel on /off switch. Meaning to say, once I switch on the amp, the MR led lights up instantly. I think it should be okay since the speakers and inputs are still dis connect at this start up. I use flux to clean up the board but there are still tiny particles in between the really tiny legs of those semI conductors. What do you guys use to clean up the board?
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I believe you still have some shorted pins somewhere.
Your 3-state toggle does not seem to behave as intended.
You should clean your PCB properly using a PCB cleaner spray.
And you can remove excess solder from the SMD parts using a thin solder wick.
It helps if you use 0.3mm solder and a magnifying glass, during solder and after (for inspection).
Patrick
Your 3-state toggle does not seem to behave as intended.
You should clean your PCB properly using a PCB cleaner spray.
And you can remove excess solder from the SMD parts using a thin solder wick.
It helps if you use 0.3mm solder and a magnifying glass, during solder and after (for inspection).
Patrick
Magnifying glass and good lighting is crucial. I have removed all the excess particles on the board, including those in between the legs of those chips and now I have 9 seconds of delay time when powering on the amp from the back panel's switch. 3Vdc across the speaker sense shut the board down.
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You need to use mica insulators and insulating washers.
This is really the most basic that one should know.
https://www.reichelt.de/Heat-Transf...ICLE=8713&GROUPID=7774&artnr=IB+2&SEARCH=ib+2
https://www.reichelt.de/Heat-Transf...ex.html?ACTION=3;ARTICLE=8194;SEARCH=glimmer
Patrick
This is really the most basic that one should know.
https://www.reichelt.de/Heat-Transf...ICLE=8713&GROUPID=7774&artnr=IB+2&SEARCH=ib+2
https://www.reichelt.de/Heat-Transf...ex.html?ACTION=3;ARTICLE=8194;SEARCH=glimmer
Patrick
C Reg C power supply or C R C power supply
No. I got v3 pcb. I am not sure how to debug all Issues.
I am using the C Reg C.
With the V3 board, there are just 2 wires that you need to connect and 2 traces that you need to cut.
See post #469.
There's a pdf file to download. The details are in there.
You really need a good magnifying glass and good lighting for this very delicate fix.
With the V3 board, there are just 2 wires that you need to connect and 2 traces that you need to cut.
See post #469.
There's a pdf file to download. The details are in there.
You really need a good magnifying glass and good lighting for this very delicate fix.
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Thanks for the pictures. I can solder the diodes for the speaker relay directly onto the legs of the relay, correct?
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Yes, the back emf diode can go across the coil pins.
Check whether the relay coil works both ways. Some are polarised and only accept +ve to a specified pin.