Tektronix 570, Руководство пользователя

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CALIBRA TION
b . Internal adjustments
All internal adjustments mid r
c. Leave controls and adjustments, for any step
as they were in the step preceding unless noted
otherwise.
' 4.
RESISTANCE CHECKS
a. Check supply resistances to ground.
check approx
supply
point resistance
-150 v
cs below T310 9 k
+100 v
cs below T310 15 k
+300 v V495 pin 1 25 k
+400 v C484 25 k
-300v T401 term
6
lOOk
+400 v floating V505 pin 8
over lOOk
-300 v floating T50l term 10 over lOOk
117 v ac
T401 ; term 1,4 inf
b. -150 27 K jack error: ±1O%, max
Check the -150 27 K jack on the teSt panel for 27 k;
±2.7 k, max, resistance between the jack and the
-150v supply .
8
570 CALIBRATION
NOTES
3b. Presetting internal adjustments
(1) Presetting internal adjustments is helpful for
"first-time" calibration but is usually unnec­
essary for recalibration. If you preset, you'll
have to perform a 100% recalibration. Don't
preset them unless you're certain a "start­
from-scratch" policy is the best.
3c. Control presets
( 1) Any time a trouble is noted on crt or meter,
check control settings.
( 2) Mis-set controls may give wrong indications
of circuit problems.
2-5-64
TEK 570 FCP