Minipro TL866 II Plus Self-Check Error - Page 1
Forum section: electronics / repair

author: siddharth.lalwala
author_rank: Newbie
timestamp: January 10, 2019, 06:09:13 am
content: I have got a XGEcu Minipro TL866II Plus programmer with the latest software and firmware from XGecu website. It was working perfectly but couple of days ago, I started experiencing problems with the programmer. It showed messages of IC short circuit / over-current messages. When I did self-check from the test menu, I found an Error called "VCC ERROR:. I have attached the screenshot for the same. I need help to fix the issue. Can anyone let me know what part of the circuit board needs to be checked?

author: Jonny
author_rank: Regular Contributor
timestamp: April 04, 2019, 04:49:31 am
content: VCC refers to a voltage rail. It will be testing all possible voltage ranges that it can supply for programming. From the specs this unit creates "Programmable VCC from 1.8V to 6.5V, VPP from 1.8V to 18V chip"I had a look in mine, directly behind the USB socket are 2 small inductors, these may be used to create voltages. Further back are 2 much larger inductors that are likely where you need to look. The related components are under these. Look carefully for physical damage, bad soldering etc. Mine has a SMD cap ripped off after it had been soldered on. Not the best quality control. Lucky for me it's not necessary.You could probe the output of these switching supplies with a DMM or scope during the self test to see what voltage appears. I would expect a few steps in quick succession as it sets a level, measures it, then sets the next in order to test itself.Good luckJonathanOK OK I'll probe mine so you know what you should getDuring test (USE A SCOPE, DMM won't show these pulses they're very short) and probing the ZIF socketpins 1 to 5 show pulses in this order 8.5V 4V 2V 4V6 8.5V 4V 2V 8.5V7 to 10 8.5V 4V 2V11 to 16 4V 2V17 to 20 2V21 to 29 4V 2V30 to 40 8.5V 4V 2VPulse widths are about 10ms with the 2V one being about 170ms in all cases. If not getting this you should trace your way back through the circuit from the zif socket and you should come to the source of the pulses and find out why they're missing or out of range. If they are all present and correct then the feedback lines must be bad and the micro can't see the values.

author: Dany
author_rank: Contributor
timestamp: May 06, 2020, 03:36:55 pm
content: Hi,I have the same problem with the tl866ii plus programmer, the yellow led flashes after a firmware upgrade that has gone corrupt.Were you able to solve the problem and if so can you tell me which procedure you usedThanksDany

author: coromonadalix
author_rank: Super Contributor
timestamp: May 06, 2020, 05:19:32 pm
content: I had a problem in the past with corrupted firmware updates, i was on win10 64bit, somehow the updates where alway corrupted, even in admin mode, tl866 inaccessible or bad device descriptor, yellow exclamation in device manager, reflashed it in a win10 32bit and all went fine ... each new requested updates was done in a win10 32bit

author: drakepirate
author_rank: Newbie
timestamp: March 07, 2023, 02:02:16 pm
content: Hi,I unsuccesfully tried to program a 21V ST M2732b Eprom.When I connected it back to USB the red led light flashed for a second it detects the programmer and inmediately after software says "No programmer found..."I thought it was F1 (had no continuity but some resistance) so I repplaced it.Now programmer boots up but it can't read any IC. Only some chips on determined Address (if I deactivate pin detect & ID check).When I start the programmer and perform a system check.An error message appears. I checked all electrolitic capacitors and they seem to be fine.1117 regulator seems to receive & convert right voltages 5/3.3V .U4 ( second MC3306AD of target VDD Supply) output voltage is around 9V and Just noticed Q9 is quite hot, can't touch it for more than few seconds.Is there Any other component or voltage to check? any of you guys have experienced something similar? How to check overcurrent protection section?Thanks in Advancehttps://proghq.org/wiki/images/3/3c/TL866II_Schematic.pdfhttps://proghq.org/wiki/index.php/TL866_II_PLUSDrake

author: coromonadalix
author_rank: Super Contributor
timestamp: March 07, 2023, 05:05:27 pm
content: hum tl866a or cs models is not the software you show ?? it is minipro 6.85 the last one for the tl866 series, xegcu 48 or 56 use other software ?Sorry its a v2 version

author: drakepirate
author_rank: Newbie
timestamp: March 08, 2023, 03:28:29 am
content: Quote from: coromonadalix on March 07, 2023, 05:05:27 pmMinipro TL866 II PlusSoftware XgPro v12.50

author: rfancella
author_rank: Newbie
timestamp: March 09, 2023, 08:38:08 pm
content: Drake,I have almost the same exact issue only on pin 40. Did you every figure out where to look or what was wrong with yours?Quote from: drakepirate on March 07, 2023, 02:02:16 pm

author: simyaci
author_rank: Newbie
timestamp: March 19, 2023, 01:56:47 pm
content: I have that same problem ?found a solution

author: rfancella
author_rank: Newbie
timestamp: March 19, 2023, 02:23:55 pm
content: You found a fix?

author: drakepirate
author_rank: Newbie
timestamp: April 07, 2023, 02:59:52 am
content: Tell us how you managed it. Please.

author: simyaci
author_rank: Newbie
timestamp: November 12, 2023, 10:53:58 am
content: Quote from: drakepirate on April 07, 2023, 02:59:52 amproblem win11no problem other pc win10