Wavetek 75 - Control Shift Register Troubleshooting; Z-Axis Driver Troubleshooting; Z-Axis Driver Functional Check

Table 6-20. Control Shift Register Troubleshooting
NOTE: Logic levels on U 1 1, U 13, U 18, and U 19 are 2 5V.
Parameter control not
functioning properly.
NOTE: If only one parameter.
is affected, refer to that cir-
cuit's guide for the correct
operation of it's control lines.
Fault
Reset.
Select REF soft key and
rotate control knob
Setup 1 Check 1 Results Desired
U 1 4-2
(SERD)
U 1 4-3
(SERC)
U 14-1
(AN LE)
U 1 4-4
(REFSEL)
U11-4, -1 4,
-1
5
Low with groups of high going
pulses.
Low with groups of high going
pulses.
Low with high going pulses.
Switching from high to low.
Same as
U14-2, -3, and -1
respectively.
Table 6-21. 2-Axis Driver Troubleshooting
I 1 ms.
Z-Axis Out not functioning
properly.
Set Z-level as shown in
table
6-22.
Fault
Take mea-
surements
as shown in
table
6-22.
Check Setup
Reset.
Press Z-level soft key.
1 Ul-2
Values shown in table 6-22.
Results Desired
A low with high going pulses every
Table 6-22. 2-Axis Driver Functional Check
ZL-2
CR11
Anode
Low
Low
Low
Low
High
High
High
ZL-1
CR12
Anode
Low
Low
High
High
Low
Low
High
ZL-0
CR13
Anode
Low
High
Low
High
Low
High
Low
Q6
Emitter
Q5 +
Base
2.6 Vdc
4.6 Vdc
6.6 Vdc
8.6 Vdc
10.6 Vdc
12.6 Vdc
14.6 Vdc
Q5'
Emitter
2 Vdc
4 Vdc
6 Vdc
8 Vdc
10 Vdc
12 Vdc
14 Vdc
*DC level
+ 1V with low
going pulses.
6-1 4
Scans by ArtekMedia O 2006