Change all the Electro Caps

C36 & C37 .....C28 & C42....C35....C48 & C52 & C73....C18,C67,C68 and you are all done
Takes about 3 hours. I can do it a lot quicker..ha..ha

I kinda thought C20 & C21 were a no brainer to be the first Cabs off the Rank so to speak, so yeah they are the very first ones to change.
Replace C18 & C29 Tants and upscale those bad Boys to 50 Volts.

You will find all will be well after you change out the Big Boys C20 & C21.

The fact that the board is getting better the more Caps you replace is proof I what I keep going on about.
ALL the Electro Caps on ALL the Boards are now Farked after 30 years and they are now causing a lot of faults great & small

Melt the solder on one leg and gently pull the cap so it pulls the legs by about 1 mm..Then do the same for the other leg.
Do that 3 times and it will come out without damage. Dont keep iron on site for more than 5 seconds at a time and monitor the board heat

This is a Push Pull Audio Amplifier and the output of the Bridge will be in the order of plus and minus 20 VDC with respect to Earth or Ground.
Any AC on these 20 Volt DC Rails WILL be amplified

The first Picture is the Audio Visual Board or WPC 95 the other 2 Pictures relate to the WPC 89 Audio Only Board

C20 & C21 10K uf 35 Volts on the WPC 95 Audio Visual Board
C24 & C25 4.7 uf 35 Volts on the WPC 89 Audio only Board

WPC 95 (resized).jpg

WPC89 Sound (resized).jpg
Whats WOT (resized).jpg

Time to change the 5 volt regulator and check and or replace any Caps hanging off it