CD32 missing red colour

neonrazor · 28 October 2021, 22:16

Hi,

I have a CD32 missing red colour from the composite signal and I am getting no svideo signal (as far as I can tell through the svideo to hdmi converter I am using).

I have reflowed the U12 chip and replaced the caps around the svideo port but not sure where to go next. I am hoping to send it for a full recap, just waiting to hear back from someone, but if anyone has any ideas if its a simple fix or where to look for the culprit it might be worth me taking a look.

Thanks

MrClump · 29 October 2021, 08:02

Quote:

Originally Posted by neonrazor

Hi,

I have a CD32 missing red colour from the composite signal and I am getting no svideo signal (as far as I can tell through the svideo to hdmi converter I am using).

I have reflowed the U12 chip and replaced the caps around the svideo port but not sure where to go next. I am hoping to send it for a full recap, just waiting to hear back from someone, but if anyone has any ideas if its a simple fix or where to look for the culprit it might be worth me taking a look.

Thanks

Check C211A, I had the same issue on an A1200 and it was the equivalent cap on that board that had failed.

Vypr · 29 October 2021, 13:19

As MrCLump said, check C211A that provides the R signal to the encoder chip.
As for no S-Video, it's possible line filter Z221 has failed. They tend to go bad if their has been a leaky cap in the area.
If you can get your hands on a CXA2075 it can replace the CXA1145 and remove the need for the line filters.

supaduper · 29 October 2021, 14:48

As said in the previous post change the CXA1145M for the CXA2075M as they fail regularly , you need to do a little mod but it is easy, I have a couple of CXA2075M chips so if you neeed one contact me.

the details on how to fit the CXA2075 below
https://www.ikod.se/cxa2075m/

28 October 2021, 22:16	#1
neonrazor Registered User Join Date: Oct 2021 Location: Lytham Posts: 1	CD32 missing red colour Hi, I have a CD32 missing red colour from the composite signal and I am getting no svideo signal (as far as I can tell through the svideo to hdmi converter I am using). I have reflowed the U12 chip and replaced the caps around the svideo port but not sure where to go next. I am hoping to send it for a full recap, just waiting to hear back from someone, but if anyone has any ideas if its a simple fix or where to look for the culprit it might be worth me taking a look. Thanks Attached Thumbnails Last edited by neonrazor; 28 October 2021 at 22:42.

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29 October 2021, 13:19	#3
Vypr Registered User Join Date: Dec 2016 Location: East Kilbride, Scotland Posts: 451	As MrCLump said, check C211A that provides the R signal to the encoder chip. As for no S-Video, it's possible line filter Z221 has failed. They tend to go bad if their has been a leaky cap in the area. If you can get your hands on a CXA2075 it can replace the CXA1145 and remove the need for the line filters.

29 October 2021, 14:48	#4
supaduper Registered User Join Date: Oct 2012 Location: Krypton Posts: 1,214	As said in the previous post change the CXA1145M for the CXA2075M as they fail regularly , you need to do a little mod but it is easy, I have a couple of CXA2075M chips so if you neeed one contact me. the details on how to fit the CXA2075 below https://www.ikod.se/cxa2075m/

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