Marantz 125 tuner capacitor orientation

[quadmatrix82]

Hello tuner experts I opened up my Marantz 125 tuner today to clean and change lamps and noticed two capacitors orientated the wrong way to the board - it works well and I recapped it many years ago I’m sure I checked the original cap polarity at the time but hoping someone can confirm if the polarity of the caps is correct or should be reversed back to how the board indicates? Capacitors in question are c423 and c254 Thankyou!

 

[Punker X]

Don't have an example here. When I doubt my install I often consult the schematic and do a continuity check with meter to make sure the positive and negative connected to next component or ground what ever the scat calls out.

 

[quadmatrix82]

Good suggestion I’ll give that a go cheers!

Don't have an example here. When I doubt my install I often consult the schematic and do a continuity check with meter to make sure the positive and negative connected to next component or ground what ever the scat calls out.[/QUOT

 

[egellings]

A good way to tell if the caps are in correctly is to use a DC voltmeter and measure any DC voltage drop across the capacitors while the amplifier is on and not passing signal. If the polarity across the caps is correct (i.e. (+) meter probe is on the (+) marked lead of the cap and you get a (+) reading on the meter), then go with that connection scheme regardless of how the PCB is marked.

 

[Lavane]

I look at the under side of the board to too see what trace from the solder eye goes to ground. Marantz did make mistakes on the silk screening with various models as did othe manufacturers.

 

[Paul Malloy]

I know this is an old post, but this older post answers your question:

Silk Screen Wrong for C253 and C254