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ZC32s Instrument Cluster Disassembly & LED Repair Guidance
Quote from A I on June 3, 2023, 3:03 pmHey, thanks a lot for this guide - I followed it to fix my temp / fuel needles backlight, works like a charm now )
Few tips/nits:
- the LEDs you want for this are PLCC-2 3528, not PLCC-4. Factory ones are 2-pin like the former. The latter has 4 pins and depending on the pinout you might need to connect them anyway, b/c instrument cluster circuit board has 4 soldering points but only 2 of them get voltage, the other two are dummy. And it can happen that PLCC-4 you get needs voltage on the pin that is dummy on the board.
- check LEDs data sheet - the ones I got (not the ones linked above, because I'm in DE) had a "key" pin marked differently - literally anode/cathode swapped comparing to factory LEDs. I've soldered mine in and got no light, was very disappointed until I studied the board layout and tried lighting LEDs from a 3.7v battery to figure out what I did wrong.
- both LEDs are connected sequentially, this is BTW when one goes - both needles do not light up. You want to change both to exactly the same spec and avoid current skew
Hey, thanks a lot for this guide - I followed it to fix my temp / fuel needles backlight, works like a charm now )
Few tips/nits:
- the LEDs you want for this are PLCC-2 3528, not PLCC-4. Factory ones are 2-pin like the former. The latter has 4 pins and depending on the pinout you might need to connect them anyway, b/c instrument cluster circuit board has 4 soldering points but only 2 of them get voltage, the other two are dummy. And it can happen that PLCC-4 you get needs voltage on the pin that is dummy on the board.
- check LEDs data sheet - the ones I got (not the ones linked above, because I'm in DE) had a "key" pin marked differently - literally anode/cathode swapped comparing to factory LEDs. I've soldered mine in and got no light, was very disappointed until I studied the board layout and tried lighting LEDs from a 3.7v battery to figure out what I did wrong.
- both LEDs are connected sequentially, this is BTW when one goes - both needles do not light up. You want to change both to exactly the same spec and avoid current skew
Quote from Zoltan Nagy on November 20, 2023, 9:07 pmYou are my saviour, thanks!
Based on the comment from Al, the LEDs are ~3-4V,right?
You are my saviour, thanks!
Based on the comment from Al, the LEDs are ~3-4V,right?
Quote from Klaus SCHAEFFER on January 13, 2024, 7:11 amFirst of all, AMAZING guide.
I just bought a 2012 Sport with rev counter and speedo needles with the light dead.I have almost none experience soldering (at least at that precision, I have repaired cables with sodering many times in my life). Is it way to complicated to try to repair this myself?
First of all, AMAZING guide.
I just bought a 2012 Sport with rev counter and speedo needles with the light dead.
I have almost none experience soldering (at least at that precision, I have repaired cables with sodering many times in my life). Is it way to complicated to try to repair this myself?
Quote from Zoltan Nagy on January 13, 2024, 7:32 amI'd suggest to find someone with experience. SMD soldering is not a piece of cake, you can easily damage the board or the parts with too much heat, the conductor can easily separate from the board. At least you need a good temperature controlled soldering station (2 makes life easier), good quality flux, solderind wire and solder wick. Some solid copper wire could also be useful, to bend a piece so it touches the legs of the part being desoldered.
If you decide to do it yourself, take tbe time and practise on scrap boards.
I'd suggest to find someone with experience. SMD soldering is not a piece of cake, you can easily damage the board or the parts with too much heat, the conductor can easily separate from the board. At least you need a good temperature controlled soldering station (2 makes life easier), good quality flux, solderind wire and solder wick. Some solid copper wire could also be useful, to bend a piece so it touches the legs of the part being desoldered.
If you decide to do it yourself, take tbe time and practise on scrap boards.
