Repairing TDS5000B acquisition board  - Page 1
Forum section: electronics / repair

author: smaultre
author_rank: Regular Contributor
timestamp: July 27, 2021, 07:43:28 am
content: Hello my friends, i need some help!Got an 5054b board, with memory, and some different errors on ACQ SELFTEST, one of the CY7C1361B-133AC goes hot( +5-15' than other).After desoldering memory errors still present.I have a dynamic channel lines on a very slow timescales, but when it start to use more mem (high resolution), the screen with channels lines halt.Trying to search where to buy some memory chips.. in the datasheet it says that mine use "2 chip enable", but i only found Cypress CY7C1361C-133AXC with "3 chip enable" functionality. I not clear understand what it means, they are compatible from up to down?Can i install one chip Cypress CY7C1361C-133AXC with others CY7C1361B-133AC?And also the diag routine says, that it fails on trigger on HITL and Nibble procs. Maybe The trigger ic is also BAD too?I'm trying to make it to triggered on low frequencies as 5 to 30Hz but it did't TRIG'D ((

author: 2N3055
author_rank: Super Contributor
timestamp: July 27, 2021, 08:14:34 am
content: CY7C1361B-133AC should be with 3 chip enables.It should be exactly the same as CY7C1361C-133AXC , except CY7C1361C-133AXC is Pb-Free..Check Pinout to be sure, but it should be it..

author: smaultre
author_rank: Regular Contributor
timestamp: July 27, 2021, 08:25:38 am
content: Yes i'm sorry i found 3 different of pdf and make a mistake..Now i got 2 groups of errors on "all"1) ACQ -3212)Trigger -442.1) On ACQ:-Memory -321-ACQmodes -331-HFStep -351-Vertical-372On Memory:MemData -321MemAddr-322DataFormat-323MemSpeed-324On ACQmodes:SubSample -331PeakDetect -332HiRes -333On HFStep:PhaseCal -351On Vertical:ADCConnects -3722)On Trigger-HITL -442 (on second test was gone)-Niblle -461On HITL (on second test was gone)AfterDBE -442On NiblleBus 461Thats all )) Who can say something about Peak detect, PhaseCal, ADC connect, HITL, Nibble BUS... things??

author: Jwalling
author_rank: Unknown
timestamp: July 28, 2021, 12:36:52 am
content: Quote from: smaultre on July 27, 2021, 08:25:38 amHave you read this?https://www.eevblog.com/forum/testgear/$200-reward-for-information-regarding-tek-tds5000b-debug/Might be helpful...

author: smaultre
author_rank: Regular Contributor
timestamp: July 28, 2021, 07:25:26 am
content: Hello Jay.It's very interesting thread thank you for this information!The log is attached on the first message is the full factory calibration log, it's very interesting!

author: Jwalling
author_rank: Unknown
timestamp: July 30, 2021, 08:47:52 am
content: Quote from: smaultre on July 28, 2021, 07:25:26 amDid you try enabling the self test log on your scope? If so, can you post it?

author: smaultre
author_rank: Regular Contributor
timestamp: August 05, 2021, 02:45:50 pm
content: Yes on the log it says that memory is bad. I awaiting for the new chips arrival.

author: Jwalling
author_rank: Unknown
timestamp: August 06, 2021, 08:34:27 am
content: Quote from: smaultre on August 05, 2021, 02:45:50 pmCould you please post the log?

author: gianrisa
author_rank: Contributor
timestamp: April 28, 2024, 09:03:19 pm
content: @smaultre were you been able to fix it especially the error 351 ?

author: smaultre
author_rank: Regular Contributor
timestamp: May 11, 2024, 06:37:10 am
content: Hello! Yep, we fixed them, by changing about 8.. 10 memory IC-s.