Keithley 2002 Repair Manual

Troubleshooting
2-5
Table 2-4
MUX_STB register control bits
Range and function
Register IC*
U206 U207
200mV DC
2V DC
20V DC
200V DC
1000V DC
11000000
10100000
01111000
10100000
01100000
00001111
00001111
01101111
00011110
00011110
200 µ A-2A DC
20 Ω -200 Ω 2-wire
2k Ω -200k Ω 2-wire
2M Ω -20M Ω 2-wire
200M Ω -1G Ω 2-wire
11010000
11000000
10100000
01100000
01111000
10101111
00001111
00001111
00001111
01101111
20 Ω -200 Ω 4-wire
2k Ω -200k Ω 4-wire
2M Ω 4-wire
11000000
10100000
01100000
00011101
00011101
00011101
2V-750V AC 10110000 11001111
200 µ A-2A AC 10110000 11001111
*Bits associated with register IC terminals as follows:
QQ QQ
87654321 87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5,
Q1=4.
Table 2-3
R2_STB register control bits
Range and function
Register IC*
U400 U432 U411 U406
200mV-1000V DC 01101010 00000000 10100011 00000111
200µA-2A DC 01101010 00000000 10100011 00000111
20Ω-1GΩ 2-wire 01101010 00000000 10100011 00000111
20Ω-2MΩ 4-wire 01101010 00000000 10100011 00000111
200mV AC
2V AC
20V AC
200V AC
750V AC
01110001
01110001
01110001
01110001
01110001
10000000
10000000
10000000
10000000
10000000
11101101
11101001
11101111
11101011
11101010
10011111
10011111
00011110
00011110
00011110
200µA-2A AC 01110001 10000000 11101111 01001111
*Bits associated with register IC terminals as follows:
QQQQQQQ Q
87654321 87654321 87654321 87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5, Q1=4.
2.7 Display board checks
If the FRONT PANEL TESTS (paragraph 2.4) indicate that
there is a problem on the display board, use Table 2-5. Cir-
cuit theory for the display is provided in paragraph 2.9.1.
Drawing reference: Display Board; 2002-110
2.8 Power supply checks
Power supply problems can be checked out using Table 2-6.
Drawing reference: Analog Board; 2002-100

Keithley 2002 Specifications

General

Brand	Keithley
Model	2002
Category	Multimeter
Language	English