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Old 05-30-2019, 03:00 PM   #73
sven337
 
Drives: Yaris
Join Date: Feb 2014
Location: France
Posts: 33
It's a buck module, not a linear power supply, you can adjust it without a load.
The VFD is only useful for testing, if you're doing my repair you don't need it you just need to set up the buck module for about 1.5V.

Removing the SMT components is easy. Chisel tip, 30W or more, add a bunch of leaded solder, heat up like crazy (you don't care you're removing everything) and the transistors will slide right off.

As for the VFD socket, I actually soldered the output lead of the buck module to the base of the VFD connector. Not soldering sounded like a potential issue with vibration.
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Old 06-09-2019, 03:41 PM   #74
adsb
 
Drives: Yaris 1.0 t3
Join Date: May 2019
Location: UK
Posts: 5
Right hand drive model repaired, thanks to sven337 for the instructions.

Photos of MP1584EN device, testing with DMM to obtain correct output of 1.5v, more photos of the existing transistors and after removal (a few pads came off in the process) , close ups of buck regulator in situ and wiring to pin 1 of VFD connector.

I disconnected the battery negative terminal before removing cluster.
Used a 12v 1.2ah battery from commercial intruder alarm panel as poor mans lab psu for testing.

I noted that there were 5 transistors not 6 for my model.
That ribbon cable is a right PITA to get back in to the slot and close the latch on the connector !

Sorry if the photos are in the incorrect order.

Thanks again sven337 !
Attached Images
File Type: jpg y1.jpg (234.8 KB, 208 views)
File Type: jpg y2.jpg (164.6 KB, 203 views)
File Type: jpg y4.jpg (235.0 KB, 205 views)
File Type: jpg y5.jpg (245.1 KB, 201 views)
File Type: jpg y6.jpg (163.8 KB, 198 views)
File Type: jpg y3.jpg (221.5 KB, 200 views)
File Type: jpg y7.jpg (209.5 KB, 204 views)
File Type: jpg y8.jpg (150.6 KB, 202 views)
File Type: jpg y0.jpg (233.3 KB, 204 views)

Last edited by adsb; 06-09-2019 at 03:53 PM.
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Old 06-29-2019, 09:38 AM   #75
sven337
 
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Thank you for the excellent pictures that will, no doubt, help people implement the fix.
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Old 08-13-2019, 10:40 AM   #76
NOLF
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Location: Kaliningrad(Russia)
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Sorry but i can find dashboard pinout, can you post it for me. I can't test me dash, i don't no where is positive and negative.
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Old 08-14-2019, 05:33 PM   #77
sven337
 
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https://perso.aquilenet.fr/~sven337/...test_setup.jpg
+12V top right
GND bottom left
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Old 11-16-2019, 08:46 AM   #78
sven337
 
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Someone asked me to repair their clock, I took a better picture of the fix + the test setup.
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File Type: jpg compteuryaris_new.jpg (124.0 KB, 85 views)
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Old 02-16-2020, 05:16 AM   #79
Sumi
 
Drives: Yaris 2006
Join Date: Jan 2019
Location: HUNGARY
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Is there anyone out there who managed to fix it by replacing the transistors? I'd need the dimming feature.
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Old 05-18-2020, 05:24 PM   #80
Sumi
 
Drives: Yaris 2006
Join Date: Jan 2019
Location: HUNGARY
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Okay, so I've pulled it apart today and resoldered the transistors, as mentioned by a comment on sven337's page. I don't know if this will last, because when I start the car the clock display comes on pretty slowly, which tells me that something isn't quite right, although I don't remember how it used to be. But at least it works for now.

@sven337, do you think that there is any risk of fire when the transistors die? I can imagine there is quite some heat if it's enough to make the PCB turn brown on the other side.
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Old 06-10-2020, 03:38 PM   #81
worm6666
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Exclamation FIXED with a little of effort

Hi folks.

I have another option - after successful measuring of all transistors - all were good - I cleaned the paths and returned back originals... And it works again.

And have created a cooling pad - from aluminium piece of thin sheet connected with heat conductive paste to transistors - like for pc repairs











hope it helps somebody...

It looks like only the soldering under the marked 3 transistors were burned...
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Old 07-05-2020, 05:20 PM   #82
bubinio
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Hi guys,

I tried sven337 solution but with 1,5V the clock is not bright at all. When i adjust it at about 2,7V to be brighter then the red lines appear. When the lights are turned on, the clock is not readable!

Great work though for sven337 and all the rest!!
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