Keithley 2002

Troubleshooting
2-93
Test 409.6 — Signal comparisons
Type
Pass/Fail
Fault message 750V range compensation
Description Same as Test 409.2. Measure the output as A/D IN.
Drawing reference Analog Board; 2002-100
Components C460, C463, Q418, Q422, U423, U425, U426, U420, and associated components.
Bit patterns
Bit pattern* Register
—U400—
01111101
—U811—
00001101
—U224—
00010111
—U432—
00000000
—U810—
00000011
—U206—
01110000
—U203—
10001110
—U411—
00111010
—U809—
11100111
—U207—
11001111
—U221—
11101001
—U406—
01101110
AD_STB
MUX_STB
R1_STB
R2_STB
*Bits associated with register IC terminals as follows:
QQQQQQQQ
87654321 87654321 87654321 87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5, Q1=4.