Tektronix 2445A - Sequence of Diagnostic Tests

Routine Type
Type Number
ON LED
All Tests
8
00
VERT
Test
01
CH 1
Test
02
CH 2
Test
03
CH 3
Malntenance-2445A/2455A Service
Table 6-4
Sequence of Diagnostic Tests
Routine Name
Error Code
Error Code Meaning
All 22
The left digit is the option number and the right digit is
the test number
of the first failing test of the last ALL
TESTS run. When looping, it shows the last failing
test.
Interrupt Request
01
Interrupt request is missing or has wrong period.
Switch Stuck
01
Trigger COUPLING lower.
02
Trigger COUPLING upper.
04
CH 1 Coupling lower.
05
CH 1 Coupling upper.
11
CH 4 VOL TS/DIV
12
CH 3 VOL TS/DIV
13
INIT@50%
14 CH 2 Coupling lower.
15 CH 2 Coupling upper.
25
CH 2 INVERT
31 CH 1 VERTICAL MODE
32 CH 2 VERTICAL MODE
33 ADD VERTICAL MODE
34 CH 3 VERTICAL MODE
35 CH 4 VERTICAL MODE
41
STEP/AUTO
42 SAVE HELP
43 RECALL HELP
44 CHOP/ALT VERTICAL MODE
45 20 MHz BW LIMIT
51 X10 MAG
52 TRACK/INDEP
53
~t (delta time).
54
~ V (delta volts).
55 Trigger SLOPE
61
Trigger SOURCE lower.
62
Trigger SOURCE upper.
63
Trigger MODE lower.
64 Trigger MODE upper.
65b
A/B TRIG select.
Readout
01 Shift register failurec (- Trigger LED).
02
Readout RAM failurec (
+ Trigger LED).
6-11