![background image](http://html1.mh-extra.com/html/keithley/2002/2002_repair-manual_3974497081.webp)
Troubleshooting
2-68
Bit patterns
Test 400.3 — DAC output set to 0V
Type
Pass/Fail
Fault message
DAC output not 0.001V
Description
This test is the same as test 400.1 except that U433 (DAC B) is configured for 0V.
Drawing reference
Analog Board; 2002-100
Components
U403, U430, U433, and associated components.
Bit patterns
Test 400.4 — DAC output set to 2.33V
Type
Pass/Fail
Fault message
DAC output not +2.33V
Description
This test is the same as test 400.1 except that U433 (DAC B) is configured for a 2.33V output.
Drawing reference
Analog Board; 2002-100
Bit pattern*
Register
—U400—
01011011
—U811—
00001101
—U224—
00010111
—U432—
10001100
—U810—
00000011
—U206—
01110000
—U203—
10001110
—U411—
11111011
—U809—
11100111
—U207—
11001111
—U221—
11101001
—U406—
00001100
AD_STB
MUX_STB
R1_STB
R2_STB
*Bits associated with register IC terminals as follows:
Q
Q
Q
Q
Q
Q
Q
Q
87654321
87654321
87654321
87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5, Q1=4.
Bit pattern*
Register
—U400—
01011011
—U811—
00001101
—U224—
00010111
—U432—
10000000
—U810—
00000011
—U206—
01110000
—U203—
10001110
—U411—
11111011
—U809—
11100111
—U207—
11001111
—U221—
11101001
—U406—
00001100
AD_STB
MUX_STB
R1_STB
R2_STB
*Bits associated with register IC terminals as follows:
Q
Q
Q
Q
Q
Q
Q
Q
87654321
87654321
87654321
87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5, Q1=4.
Содержание 2002
Страница 1: ...Model 2002 Multimeter Repair Manual Contains Servicing Information...
Страница 125: ...Troubleshooting 2 112...
Страница 145: ...A Specifications A 1...