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avatar: KNR
KNR
2 posts
Replied to KNR's post on July 8th, 2019

I rebuilt the power supply in htis unit, powers up fine now but gives T sensor 3 err code

Any help would be greatly appreciated

avatar: KNR
KNR
2 posts
Replied to KNR's post on July 8th, 2019

I got the lid T sensor working, but now have a Block Check Sum Error.               W/ no Number

avatar: tgtech
tgtech
2 posts
Replied to KNR's post on August 19th, 2019

KNR, have you possibly been able to sort this issue?

I had a PCB burn on the solder pots for a circuit limiter on the power supply board. I cleaned the pcb, redrilled holes for new solder pots and copper circuit tracing. I had replaced the part successfully, as the mastercycler would not turn on before.

I am currently at your stage. I had the Tsensor error as I checked it without properly replacing the lid. I properly fitted it and this is no longer an issue.

Now I am left with a Block Check Sum Error w/ no number as well. 

have you discovered any remedy for the Block Check Sum error ??

 

avatar: SaharaSimba
SaharaSimba
81 posts
Replied to KNR's post on August 19th, 2019

Digital sensor failure.  Thermoblock will need rebuild.  If you are interested Sahara Simba Electronics rebuilds blocks.

avatar: tgtech
tgtech
2 posts
Replied to SaharaSimba's post on August 20th, 2019

Thermblock is heating with no issues. Block checksum error is related to the computer bootlogs etc. Thermblock is simply just the most expensive thing to tell a tech they need repaired. KNR, please let me know if you have found this remedy.

avatar: SaharaSimba
SaharaSimba
81 posts
Replied to KNR's post on August 21st, 2019
Tgtech... just for your information. Sahara Simba Electronics is a small company that is against such practices as big manufacturers take on... we are here to help people and provide an honest service.... If you need to confirm a working sensor or block issue ... you can call our Techs and we guide you through a diagnostic test to confirm functionality of the 4 sensors and block Peltiers before a rebuild.
avatar: KANR
KANR
2 posts
Replied to tgtech's post on August 28th, 2019

Test the three connectors comming from power supply to see if there is power to board. If not test 4th pin down on supply board where power supply board connects next to ribbon cable from display. This signal goes to an optocoupler at bottom of supply board.

avatar: KANR
KANR
2 posts
Replied to KANR's post on August 29th, 2019

add a little more. From the optocoupler it goes to a smt n channel fet to two transisters (TO 220 I believe) at top of board that power heater board. Transistors are tight but accessible to test.