Products > Test Equipment
Tektronix MSO70404 SPC Failure
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dxl:
I got a MSO70404, unfortunately it's not working properly: The SPC fails with the following messages:


--- Code: ---    Scope.exe Version: 5.3.3 Build 3; 00:01:31:765[3744] acqDiagPublicCmds.cpp:diagInitPLL(2386) U2031(LMX2306PLL) was detected successfully (re)locked 1 times after waiting 450.00ms.
00:01:31:765[3744] acqDiagPublicCmds.cpp:diagInitPLL(2389) U2031(LMX2306PLL) locked and unlocked within 3.83ms.
Tue Jan 01 00:01:31 2002: Executing Powerup diags ... Pu=79 T=30C
Test "111" - Processor-->Memory-->DRAMWalk1 started
     Test execution time 5.406e-006 sec
Test "112" - Processor-->Memory-->DRAMCell started
     Test execution time 0.0028105 sec
Test "113" - Processor-->Memory-->DRAMMarch  started
     Test execution time 0.00072254 sec
Test "114" - Processor-->Memory-->DRAMCal  started
     Test execution time 4.131e-006 sec
Test "211" - Registers-->PCI-->MIA started
     Test execution time 0.002902 sec
Test "221" - Registers-->Acquisition-->ACL started
     Test execution time 0.0026814 sec
Test "222" - Registers-->Acquisition-->PLL started
     Test execution time 0.074171 sec
Test "223" - Registers-->Acquisition-->Preamp started
     Test execution time 0.0068422 sec
Test "224" - Registers-->Acquisition-->TrkHld started
     Test execution time 0.0074064 sec
Test "225" - Registers-->Acquisition-->ADC started

                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x1/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xffe/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x2/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xffd/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x4/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xffb/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x8/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xff7/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x10/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xfef/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x20/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xfdf/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x40/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xfbf/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x80/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xf7f/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x100/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xeff/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x200/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xdff/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x400/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xbff/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x800/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x7ff/0x0
                DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0xfff/0x0
       *** TEST FAILED ***
     Test execution time 0.021683 sec
diagMgr:diagLogFailure: Tue Jan 01 00:01:31 2002 P Pu=79 T=30 "DataLineTstStepFail- U300_A4(HFD204[4])/SPARE+0x000 exp/act 0x1/0x0"

--- End code ---

From the error messages it looks like the ADC isn't responding at all. The Acquisition board is basically a PCB with almost all BGA chips, so not easy to solder. Anyone familier with these units here? I would guess that this is game over?
dxl:
Interesting - directly beneath the failed ADC, pick and place was going wrong and seems to have spit a few smd capacitors... See the circled areas in the picture.  :o Unfortunately, removing them didn't fix the problem, and i haven't found any places on the PCB where parts are missing.
tv84:

--- Quote from: dxl on May 18, 2022, 02:42:51 pm ---Interesting - directly beneath the failed ADC, pick and place was going wrong and seems to have spit a few smd capacitors... See the circled areas in the picture.  :o Unfortunately, removing them didn't fix the problem, and i haven't found any places on the PCB where parts are missing.

--- End quote ---

Is this a Tek??   :wtf:
EE-digger:
Those could be reworks but the photos do not give a good view of the solder joints.  If the parallel pair of parts look well attached to each other from your "live" view, my vote would be for a rework.
dxl:

--- Quote from: EE-digger on May 19, 2022, 02:25:17 am ---Those could be reworks but the photos do not give a good view of the solder joints.  If the parallel pair of parts look well attached to each other from your "live" view, my vote would be for a rework.

--- End quote ---

There was no solder at the extra parts. I could move them away without much force. So somehow they sticked to the pcb, but it didn't look like they where supposed to be there.
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