| Electronics > Repair |
| [SOLVED] HP 34401a - Error 612, 613, 615, 617, 618, 619, 621 |
| << < (5/22) > >> |
| TiN:
Yes, that's correct connection. Use manual ranges for ohms on bad DMM, and measure current. Change to every range and check all current source levels. |
| chihaxinh:
Hi Tin I checking and give new information, vol dc and ohm function not woking in 2W and 4W mode I check current like your said and have 000.000 Ohm - 1mA 0.00000 KOhm - 1.006mA 00.0000 KOhm - 1.002mA 000.000 KOhm - 0.010mA 0.00000 MOhm - 0.005mA 00.0000 MOhm - 0.000,6mA 000.000 MOHm - 0.000,6mA And voltage measurement after replace U201 and swap pin Q202 for correct pinout in schematics. |
| TiN:
Then your ohms current source working fine, and problem is somewhere else. Did you check all zener voltages and power rails? I think you saw my 34401 repair? Maybe yours have similar problem. |
| chihaxinh:
Hi Tin, i checking power supply rails , everything ok ! Voltage DC and Ohm function not work ( 2W or 4W mode ) |
| TiN:
Did you check all the zeners? There are many of them. |
| Navigation |
| Message Index |
| Next page |
| Previous page |