Tektronix T922 User Manual

Purpose : To test semiconductors .
Example
: Tektronix 576 Curve Tracer or Tektronix
577 (D1 or D2) Curve Tracer with 177 Test Fixture
.
2 . Test Oscilloscope
Description : Frequency response, do to at least 15
MHz . A 10X, 10 Mfg voltage
probe should be used to
reduce circuit loading for voltage measurements
.
Purpose : To check operating waveforms .
3 . Multimeter
Description : Non-loading digital
multimeter
.
Voltmeter, 10 Mfg input impedance and 0 to 150 V
range ; do voltage accuracy, within 0 .15% ;
display, 4
1/2 digits . Ohmmeter, 0 to 20 Mil .
Purpose :
To check voltages and for general
troubleshooting .
4 . Variable Autotransformer
Description : Output variable from 0 to 140 V, 1 .2A
minimum rating . Musthave a three-wire power cord,
plug and receptacle .
Purpose
: To vary the input line voltage when
troubleshooting in the power supply .
Example : General Radio W8MT3VM
or
W10MT3W
Metered Variac Autotransformer .
5 . Vertical Amplifier Extender Troubleshooting Fix-
ture
Description : 18 inch ribbon cable with an interface
con
rector at each end (Tektronix part 067-0773-00) .
Purpose : To operate the
Vertical
Amplifier
outside
the instrument . Useful for troubleshooting the Time
Base which
is inaccessible with the Vertical
Amplifier installed .
Troubleshooting Techniques
The troubleshooting techniques for the T922R are
similar to those for the standard T922 . However, the
Vertical Amplifier
extender troubleshooting fixture
will not work with the T922R .
The ribbon cable
already in the T922R, which
connects the interface
board and the vertical module, will serve as an
extender .
The following checklist
is arranged so that you check
the simple things before you get the instrument
taken
apart
. Start at the beginning .
REV . A, JUNE 1976
NOTE
Service Information-T921/T 92 2/T922R
1 . Check the Control Settings . See the Operating
Instructions for the correct control settings .
2 . Check Associated Equipmentand Connectors .
Check to see that the signal source is properly connected
and that the interconnecting cables are not defective . Also
check
the
power cord and plug and the
power
source
for
defects .
3 . Check the Performance of the instrument . If the
instrument does not meet specifications, the trouble may
be corrected by readjusting the instrument
.
See the
Adjustment Procedure, Section
4, for instructions
.
4 . Visual Check . A visual check may reveal broken
connections, damaged components, semiconductors not
firmly mounted, damaged circuit boards, etc .
5 . Isolate the Trouble to a Circuit . To isolate trouble to a
particular circuit, note the trouble symptom . The symptom
often identifies the circuit where the trouble is located . For
example,
poor focus indicates that the crt circuit
(including the high-voltage supply)
is probably at fault .
When trouble symptoms appear in more than one circuit,
check affected circuits by taking voltage and waveform
readings .
Incorrect operation
of
all circuits often
indicates trou-
ble in the power supply . Check first for correct voltage
of
the individual supplies . However, a defective component
elsewhere in the instrument can appear as a power supply
trouble and may also affect the operation of othercircuits .
Table 5-1 lists the tolerances of the power supplies .
Voltages are
measured between the power supply test
points and ground . If a power supply voltage is within the
listed tolerance, assume the supply
is
working correctly .
TABLE 5-1
Power SupplyTolerance
Use
the troubleshooting chart
to locate trouble . Not
all
problemsappear
on
the chart . Continue with this check=
list in those cases .
5-3
Supply Tolerance
-8 V Set within 0 .5%
+8 V Within 3%
+100 V Within 5%

Tektronix T922 Specifications

General

Brand	Tektronix
Model	T922
Category	Test Equipment
Language	English