Tektronix 5103N

System
Maintenance—51
03N
cable through the slot
in
the main portion of
the CRT
shield.
Pull
the CRT out of the instrument from the front,
then remove the
neck shield.
B.
REPLACEMENT:
1.
Slide the
neck shield
onto the
CRT neck.
2. Make
sure
the soft plastic CRT faceplate
supports are
in
place, then insert the CRT into the main shield while
feeding
the storage-element
cable through the slot
in the
shield. Before the
CRT
is
completely inserted, slide the
CRT clamp
over the neck shield.
3. With the
CRT fully inserted and loose in the shield,
mount the bezel assembly into place
and tighten
the bezel
screws.
4.
Mount
the
CRT clamp and positioning hardware,
temporarily
leaving it loose.
5. Position the rear
of
the
CRT (socket end) so there
is
no tilt
of the faceplate in
relation to the bezel assembly.
Tighten the positioning
screws, then tighten the
clamp
hardware.
6.
Place the CRT base
socket onto
the CRT base
pins.
Replace
the
cover.
If applicable,
connect the storage-
element
cable to the
pin
connectors on the Storage circuit
board, and
connect the
deflection leads to
the CRT neck
pins.
7.
Replacing
the CRT
will require
partial instrument
recalibration.
Refer to the
calibration
section of the display
unit manual.
Neon Bulb
Replacement
To replace
the
knob-skirt
deflection-factor readout
bulbs,
proceed as
follows:
1.
Remove the light
shield.
2.
Unsolder
the defective
bulb,
and
install
its
replacement.
3. Replace
the light
shield.
Power Transformer
Replacement
Replace
the power transformer
only with
a direct
replacement Tektronix
transformer.
After the
transformer
has been
replaced, check
the power
supply output
voltages
as outlined
in the calibration
section of this
manual.
Also,
check
the CRT
operation as
outlined in the
calibration
section
of the display
unit manual.
Fuse
Replacement
Table 4-3
gives the rating,
location, and
function of the
fuses used
in this
instrument system.
TABLE
4-1
Circuit
Number
Rating Function
Location
F20, F206
1/16 A
Fast Input
Protection
5A20N/5A21N
circuit board
F201
1
.6
A
Fast
Line-Voltage
Input
Display
unit
rear panel
F810
0.25
A
Fast
+205
V
Unreg
supply
5103N
Power
Supply board
F835
0.5 A Fast
+38
V
Unreg
supply
5103N
Power
Supply
board
RECALIBRATION
AFTER REPAIR
After any electrical component
has
been replaced,
the
calibration of that particular circuit should be
checked,
as
well
as the calibration of other closely related circuits. The
Performance
Check instructions in each manual
provide
a
quick and
convenient means of checking the instrument
operation.
4-8