Output Amplifier Troubleshooting; Attenuator Troubleshooting - Wavetek 75 Instruction Manual

Table 6-1 7. Output Amplifier Troubleshooting
Fault
No waveform output.
Waveform output distorted
or offset.
Setup
Reset.
Select square function.
Erase current waveform.
Check
I
Results Desired
0 7 base
0 8 base
U 1 0-6
0 7 emitter
0 8 emitter
0 9 base
0 1 0 base
U8-6.
Junction of
R51 and
R52.
Table 6-18. Attenuator Troubleshooting
*
1.95V square wave.
_+
1 0V square wave
Fault Setup
No waveform output. Reset.
Select sine function.
Amplitude and offset
controls not functioning
properly.
Reset.
Select sine function. Set
amplitude to 5.00 Vp.
Check
I
Results Desired
20 Vp-p sine wave.
10 Vp-p sine wave on both sides of
fuse F2.
R61 (AO)
R62 (Al)
K1-14
K1-7
K2-7
CR20 anode
+
5v
+
5v
20 Vp-p sine wave.
20 Vp-p sine wave.
20 Vp-p sine wave.
10 Vp-p sine wave.
Set amplitude to
499.5 mVp.
Set amplitude to
49.95 mVp.
R61 (AO)
R62 (Al)
K1-14
K1-7
K2-7
CR20 anode
+
5v
-
5v
-20 Vp-p sine wave.
-20 Vp-p sine wave.
ov.
-1 Vp-p sine wave.
R61 (AO)
R62 (A1
)
K1-14
K1-7
K2-7
CR20 anode
-
5v
-
5v
-20 Vp-p sine wave.
ov.
ov.
-.1 Vp-p sine wave.
Scans
by ArtekMedia O 2006