P700 Power Amp Board & other misc items
I got a nice shot of the power board before I started work but forgot to shoot the finished product until it was installed. Sorry. Huge pain to get this board in and out so no redo's. Also never got a photo of the coupling/filter capacitors beforehand but they're in the finished shot along with the power board.
The documented contents of the original board are as follows:
C701/C702 - 50v/0.47uf low leakage capacitors
C703/C704 - 35v/220uf capacitors
C707 thru C710 - 50v/47uf capacitors
C711/C712 - 35v/10uf capacitors
C715/C716 - 10v/100uf capacitors
C717/C718 - 35v/22uf capacitors
H701/H702 - 2SC945 transistors
H703/H704 - 2SC1175 transistors
H705/H706 - 2SC371 transistors
H707/H708 - 2SA562 transistors
R713/R714 - 2.2Kohm/0.5watt resistors
R721/R722 - 3.3Kohm/0.5watt resistors
R723/R724 - 100Kohm/0.5watt trimmer
R729/R730 - 470ohm/0.5watt trimmer
R747 thru R750 - 0.5ohm/3watt fireproof resistors
R753/R754 - 10ohm/0.5watt resistors
Notes: you don't have to replace the resistors. They don't usually go bad but I like fresh replacements.
The replacements are listed below with Mouser part numbers:
C701/C702 - Nichicon 50v/0.47uf film 647-QYX1H474JTP (normally would use WIMA but was out and these were handy)
C703/C704 - Elna Silmic II 35v/220uf 555-RFS35V221MI6#5
C707 thru C710 - Elna Silmic II 50v/47uf 555-RFS50V470MH4#5
C711/C712 - Elna Silmic II 35v/10uf 555-RFS35V100ME3#5
C715/C716 - Elna Silmic II 16v/100uf 555-RFS16V101MH3#5 (watch out here - the board polarity is marked incorrectly!!)
C717/C718 - Elna Silmic II 35v/22uf 555-RFS35V220MG3#5
H701/H702 - Fairchild 512-KSC2383YTA
H703/H704 - Fairchild 512-KSC2383YTA
H705/H706 - Fairchild 512-KSC945CYTA (make sure to get the CYTA and not YTA - the extra C denotes center collector ECB which matches original)
H707/H708 - Fairchild 512-KSA733CYTA (make sure to get the CYTA and not YTA - the extra C denotes center collector ECB which matches original)
R713/R714 - KOA Speer 2.2Kohm/1watt 660-MO1C222J (increased wattage and fits in same space)
R721/R722 - KOA Speer 3.3Kohm/1watt 660-MO1C332J (increased wattage and fits in same space)
R723/R724 - Bournes 100Kohm/0.5watt 652-3386F-1-104LF
R729/R730 - Bournes 470ohm/0.5watt 652-3386F-1-471LF
R747 thru R750 - Vishay 0.5ohm/3watt fireproof 594-AC03W0R500J
R753/R754 - KOA Speer 10ohm/1watt 660-MOS1C100J (increased wattage and fits in same space)
And then finishing up with 4 other system capacitors.
The documented contents are listed below:
C001 - 10v/33uf capacitor (on the meter leads)
C004/C005 - 50v/2200uf capacitor
C006 - 63v/4700uf capacitor
The replacements are listed below with Mouser part numbers:
C001 - Elna Silmic II 25v/330uf 555-RFS25V330MG3#5 (increased voltage based on availability)
C004/C005 - Nichicon Gold Tune 63v/3300uf 647-LKG1J332MESCBK (increased voltage & uf based on availability & person preference)
C006 - Nichicon Gold Tune 80v/4700uf 647-LKG1K472MESCBK (increased voltage based on availability. in hindsight this should have been a 40mm capacitor instead of 35mm. Luckily I had an extra clamp that fit properly.)