Need Help Roland SP540 not printing questions

[Wepaintemwild]

I should have been more clear. Set it to 200 on the ohms scale.

Sorry, I'm not all that familiar with testing stuff like this. I set to 200k and both fuses climbed to like 188 and then screen goes back to 1

 

[Jim Hancock]

Set it to 200 in that same section of the meter control. But it looks like both fuses are blown. But I want to confirm with a new reading at 200.

 

[Jim Hancock]

See attached... look at arrow.

 

[Wepaintemwild]

My apologies...not used to testing stuff like this. When I set it on 200k it metered up to 180's and then screen goes back to1 (home screen)

See attached... look at arrow.

 

[Wepaintemwild]

Duh...finally set on 200.. my eyes are bad. Made contact on both fuses...nothing on either

 

[Jim Hancock]

OK, so both fuses are blown. Next check the output transistors. See pic. If unsure what to do, call me...

 

[Wepaintemwild]

OK, so both fuses are blown. Next check the output transistors. See pic. If unsure what to do, call me...

I checked them...all are reading between 28-29

 

[Jim Hancock]

OK, they are probably all good. If you touch your meter leads together does it go to zero? Let me know what this reading is please...

 

[Wepaintemwild]

OK, so both fuses are blown. Next check the output transistors. See pic. If unsure what to do, call me...

I checked them...all are reading between 28-29

OK, they are probably all good. If you touch your meter leads together does it go to zero? Let me know what this reading is please...

 

[Wepaintemwild]

It goes to.3

 

[Jim Hancock]

It looks like the transistors are OK. You need to replace the fuses. Do you have someone who can do this? If not, that is a service I offer. Contact me through email about that. My suggestion at this point would be to repair the board and put in 2 new heads. There is no real way to test the heads, which likely caused the fuses to blow. Were the second set of heads you put in known good heads?

 

[Wepaintemwild]

What does your meter read when holding the red and black test leads together? The fact that all the transistors read the same is good.

.3

 

[Jim Hancock]

It looks like the transistors are OK. You need to replace the fuses. Do you have someone who can do this? If not, that is a service I offer. Contact me through email about that. My suggestion at this point would be to repair the board and put in 2 new heads. There is no real way to test the heads, which likely caused the fuses to blow. Were the second set of heads you put in known good heads?

 

[Wepaintemwild]

.3

It looks like the transistors are OK. You need to replace the fuses. Do you have someone who can do this? If not, that is a service I offer. Contact me through email about that. My suggestion at this point would be to repair the board and put in 2 new heads. There is no real way to test the heads, which likely caused the fuses to blow. Were the second set of heads you put in known good heads?

Ok, can't thank you enough for your help. Should I be concerned about that outside capacitor in the corner of the board..it did not react to the meter

 

[Jim Hancock]

No, as capacitors can give funny readings, based on which meter leads touch which side of the capacitor. You really need a special capacitor tester to check capacitors. The primary thing is all your transistors are reading the same. When they go out, they usually short out, and this would have shown up in the readings you took. Let me know if you need me to repair the board for you...

 

[Wepaintemwild]

No, as capacitors can give funny readings, based on which meter leads touch which side of the capacitor. You really need a special capacitor tester to check capacitors. The primary thing is all your transistors are reading the same. When they go out, they usually short out, and this would have shown up in the readings you took. Let me know if you need me to repair the board for you...

No, as capacitors can give funny readings, based on which meter leads touch which side of the capacitor. You really need a special capacitor tester to check capacitors. The primary thing is all your transistors are reading the same. When they go out, they usually short out, and this would have shown up in the readings you took. Let me know if you need me to repair the board for you...

I could probably get done by a close friend, but would feel more comfortable letting you do it. If you want to email me your info, I will get it ready.
Jackflash65@comcast.net

 

[Jim Hancock]

Email sent...

 

[player]

I run wires from the fuses on the board to external fuse holders. Then If they need replacing again it is easy.

 

[Jim Hancock]

That would be a good modification to make. Do you have a part number or such for the fuse holder?

 

[Joe House]

I just solder new ones right on top of the old ones. This way you can use the right fuse and if you have to replace, you're desoldering from the fuse and don't really risk damaging the board. - Or you could even solder a socket on top of the old fuses - it works.