TDS540 no picture   (debug logging added) - Page 1
Forum section: electronics / repair

author: charlyd
author_rank: Frequent Contributor
timestamp: January 02, 2018, 03:28:01 pm
content: Hello i got a TDS540 over here. the unit powers-up and it gives at the end -> wandering 2 left digits on the display ( i would say looks good )[what happened the days before....]- Replaced the SMT electrolytic caps on every board, so also the fron tpanel.- Plus a thorough degrease and clean on the boards and cleaned with IPA.[What needs to be done still...]- NVram swap ( but it give no error yet at this moment so first fix picture)after over checking all the work done yet..i putted it back together and ran a debugging log at the console port while booting:--------------------------------------------------------------------------------------Bootrom Header Checksum passed.Bootrom Total Checksum passed.BootRom Check Sum passed.Bus Error Timeout test passed.Kernel Diagnostics Complete.Calling SDM (monitor) Routine.Enabling Bus Control register. Value = 0x67IMR 1 Register test passed.Misc. Register test passed.Timer Interrupt test (Auto-Vector) passed.NVRam DSACK test passed.NVRam Write protected.Flashrom DSACK and JumpCode test passed.Flashrom Checksums passed.Bootrom Diagnostics Complete.Transferring control to the Flashrom.-> Console Loopback O.K. <-.^^^^ ^^^^^^ ^^^^ ^^ VxWorks Development System^^ ^^^^ ~~~~~~~~ ~~^^ ^^ ~~~ ~^^ ^^ ~~~^^^^ ~ ~~~^^ ~~ ~~~VxWorks version 4.0.2.Stripped Stand Alone Rom Version.Columbia Proc. Brd. Rev GG065801System Ram Size = 1048576, Proc ID = 0x18Clock Interval = 13108 usecs,Bootline Storage Size = 296 stored @0x4000068Flash ID = 0x0, Flash Wait states = 2 (Misc. reg = 0x14),KERNEL: WIND version 1.0. GCC COMPILEDCopyright 1991-2001, Tektronix, Inc.made on: Wed Feb 12 15:28:50 PST 1992.copyright Wind River Systems, Inc., 1986, 1987, 1988, 1989Executing DiagnosticsERRORID: 149 diagnostic test failure Start Power-On SequenceStart Power-On Diag SequencehwAccountant probe routinesProbe for unexpected pending intsDsp Instr mem sizeDsp D2 mem sizeDsp D1 mem sizeDsy Vect0 mem sizeDsy Vect1 mem sizeDsy Wfm0 mem sizeERRORID: 149 diagnostic test failure initVSC()Dsy Wfm1 mem sizeERRORID: 149 diagnostic test failure initVSC()Dsy Text0 mem sizeDsy Text1 mem sizeAcq number of digitizersAcq mem sizeCpu timer interval uSecCpu Dram sizeNvRam mem sizeOpt RS232/ Cent presenceERRORID: 64 wrong hardware configuration Dsy Wfm0 mem size probe, expect: 1ffff,actual: 0ERRORID: 64 wrong hardware configuration Dsy Text0 mem size probe, expect: ffff,actual: 0dspForcedBus ................... passcpuDiagD2MiscReg ............... passcpuDiagDSPIntMaskReg ........... passcpuDiagD1D2Access .............. passcpuDiagDsyAccess ...............Bus Err----------------------------------------------------------------------------------------After that i booted the unit with ACQ & Front panelsdisconnectedstill the same no picture.( so only the cpu/dram board connected to get a picture ).i checked U190 back to U81 but get lost there, i assume some prerequisites are not in place yet. The boot process doesn t come to an end. no ticking relays from inputs and all ( when connected) channel leds lite.anybody experienced with this problem.. or where to look/check. ?

author: charlyd
author_rank: Frequent Contributor
timestamp: January 02, 2018, 05:15:48 pm
content: as for the logging it would suggest to check ERRORID: 149 diagnostic test failure initVSC()so the troubleshoot should be....-------------------------------------------------------Run the dsyDiagVscDiagReg diagnostic in loop.This standard register test exercises U81 and its associated Circuitry.See Diagnostic register test description for details.repair any adress bus errors on inputs of U81-------------------------------------------------------any suggestions where to get the dsyDiagVscDiagReg diagnostic

author: fenugrec
author_rank: Frequent Contributor
timestamp: January 02, 2018, 08:24:55 pm
content: Quote from: charlyd on January 02, 2018, 05:15:48 pmHave you tried entering dsyDiagVscDiagReg on the service console port ?

author: charlyd
author_rank: Frequent Contributor
timestamp: January 04, 2018, 08:45:37 pm
content: thanks for your response.No i didnt try but i have to run it in a loop. How do i do that, run in a loop on the console port ? i think it is a toolkit from Tek.if it is not the case and usable in a way please let me know...

author: charlyd
author_rank: Frequent Contributor
timestamp: January 21, 2018, 09:18:06 am
content: because of the errorDsy Wfm0 mem size probe, expect: 1ffff, actual: 0Dsy Text0 mem size probe, expect: ffff, actual: 0i was looking arround on the the U71,U72 and the U108-U111 but i can not find any missing or broken dataline.i would suspect that getting 0 where to suspect 1ffff would end up finding a missing like 0001 1111 1111 1111 1111and where to suspect ffff (like 1111 1111 1111 1111) i am getting a 0.I probe arround a whole day but didn t find any things in that area so i hope somebody else had such a error and can point me in the right direction.to make things more simple the circuitry of WMF1 and Text1 arenotimplemented on this board.any suggestions..

author: charlyd
author_rank: Frequent Contributor
timestamp: January 21, 2018, 05:00:17 pm
content: this afternoon i tested the comands like : dsyDiagVscDiagReg on the console port. Two things or it is not working or i do something wrong...if anybody is experenced with VXworks commands please jump in this topic..