Subject: Tektronix 2430A overshot (overrange) can't pass self-diagnostics

From: "Chuanxiao Li \(Pholink\)" <[email-masked]>
Date: Tue May 27 07:31:53 2003

Hi:

    The Tek 2430A input is "50 Ohm 5V RMS". I put 200V in CH1, then smell
something. after that the 2430A can't pass the Extended-Diagnostics! (CH2 is
OK). Does anyone know which component was burnt away?  thanks

Li

      0000 Extended -Diagnostics
     1000 Sys-Rom Pass
     2000 Reg Pass
     3000 Sys-Ram Pass
     4000 FPP Pass
     5000 WP Pass
     6000 Cksum-Nvram Pass
     7000 CCD Pass
     8000 PA Fail
      8100 Offset  Fail
       8110 Norm-SP  Fail
        8111 CH1 Fail
        8112  CH2 Pass
       8120 Norm-FISO Fail
        8121 CH1 Fail
        8122 CH2 Pass
       8130 ENV-SP-slow Fail
        8131 CH1 Fail
        8132 CH2 Pass
       8140 ENV-FISO-slow
        8141 CH1 Fail
        8142 CH2 Pass
      8200 Pos-Agin Fail
       8210 CH1 Fail
       8220 CH2 Pass
      8300 Balance Fail
       8310 50mV Fail
        8311 CH1 Fail
        8312 CH2 Pass
       8320 20mV Fail
        8321 CH1 Fail
        8322 CH2 Pass
       8330 10mV Fail
        8331 CH1 Fail
        8332 CH2 Pass
       8340 5mV Fail
        8341 CH1 Fail
        8342 CH2 Pass
       8350 2mV Fail
        8351 CH1 Fail
        8352 CH2 Pass
      8400 Gain Fail
       8410 50mV Fail
        8411 CH1 Fail
        8412 CH2 Pass
       8420 20mV Fail
        8421 CH1 Fail
        8422 CH2 Pass
       8430 10mV Fail
        8431 CH1 Fail
        8432 CH2 Pass
       8440 5mV Fail
        8441 CH1 Fail
        8442 CH2 Pass
       8450 2mV Fail
        8451 CH1 Fail
        8452 CH2 Pass
      8500 INV-Gain Fail
       8510 50mV Fail
        8511 CH1 Fail
        8512 CH2 Pass
       8520 20mV Fail
        8521 CH1 Fail
        8522 CH2 Pass
       8530 10mV Fail
        8531 CH1 Fail
        8532 CH2 Pass
       8540 5mV Fail
        8541 CH1 Fail
        8542 CH2 Pass
       8550 2mV Fail
        8551 CH1 Fail
        8552 CH2 Pass
      8600 Var-Max Fail
       8610 CH1 Fail
       7620 CH2 Pass
      8700 Attenuator * Pass
     9000 Trigs Fail
      9100 Offset  Fail
       9110 A-trig Fail
        9111 CH1 Fail
        9112 CH2 Pass
        9113 Slop Fail
        9114 Ext1X1* Pass
        9115 Ext1X5* Pass
        9116 Ext2X1* Pass
        9117 Ext2X5* Pass
       9120 B-trig Fail
        9121 CH1 Fail
        9122 CH2 Pass
        9123 Slop Fail
        9124 Ext1X1* Pass
        9125 Ext1X5* Pass
        9126 Ext2X1* Pass
        9127 Ext2X5* Pass
      9200 Gain Fail
       9210 A-trig Fail
        9211 CH1 Fail
        9212 CH2 Pass
        9213 Ext1X1* Pass
        9214 Ext1X5* Pass
        9215 Ext2X1* Pass
        9216 Ext2X5* Pass
       9220 B-trig Fail
        9221 CH1 Fail
        9222 CH2 Pass
        9223 Ext1X1* Pass
        9224 Ext1X5* Pass
        9225 Ext2X1* Pass
        9226 Ext2X5* Pass
       9300 Repet* Pass