Bug #274
K2 : ERROR 401.1 - Signal switching; zero cal switch
Start date:
07/19/2012
Due date:
% Done:
0%
Estimated time:
Description
Cannot measure 0V ±0.001V at A/D IN.
Common is routed to the ACF line through U526 (SHORT pulled low). ACF is then
routed through multiplexer U511. The output of the multiplexer (OUT) follows the
same path to the A/D buffer (U322) as the 400 series tests. U322 is conÞgured for x1
gain. Measure 0V at A/D IN.
Suspected components:
U526
U511
U322 - same as 400 tests - x1 gain
Updated by tin about 8 years ago
- Status changed from New to Resolved
Fixed by Q330 and Q512 replacement