Tektronix 570, Manual

Page: 110 / 134

CALIBRATION
2. PRELIMINARY INSPECTION
a. General
Check for unsoldered joints, rosin joints, lead
dress and long leads. Check for loose hardware and
protruding parts. Check controls for smooth mech­
anical operation, proper indexing, and knob spacing
from front panel.
b.
234 v ac wiring
Assure that the ac lead from T401 term 2 is con­
nected to T340 term 3.
c.
Fuses
F402 117 v SO-60 cps operation
159-006 Sa
3 ag slo-blo
F 402 234 v 50-60 cps operation
F2SS
F310
d.
159-005
3a
3 ag
159-024 1/16a 3 ag
159-025
1/2a 3 ag
Crt
slo-blo
fast-blo
fast-blo
Check that crt neck pin connections are tight. Loos­
en crt clamp, remove graticule, push crt forward
and check crt face plate tilt relative to front panel;
keep black light shield in place. Push crt forward to
a straight edge firmly placed against the front panel,
across any diameter of the crt. Check gap within
phosphor area with special crt face tilt checker:
1/32", max.
'.
Straight
.
.
:
_
_1_
1/32;,'max 1/32" max 1/32"nia�
Tilt
Concavity Convexi.ty
Tighten crt cla
rrtp
�
6
570 CALIBRATION
NOTES
2a. WARNING
(1) CSOS and CS06 (in power supply) normally hold
a high charge for some time after instrument
turn off.
2d. NOTE
(1)
These crt specifications are simplified. Do
not reject crt without the authorization of a
trained crt checker, or without reference to
crt data.
2-5-64
TEK 570 FCP-