HP 202A Operating And Service Manual

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Brand: HP

Category: Processor

Type: Operating and service manual for HP 202A

Pages: 47

Download HP 202A Operating and service manual

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Model 202A
-
Page 2
ERRATA
:
Section
IV-13
FREQUENCY RATIO AND CALIBRATION PROCEDURE
Step
8)
Check calibration of the "Xl" range, The output
frequency should be within
22% of the dial read-
ing over the entire range. Adjust
R26B if neces-
sary.
Step
9)
Check the calibration of the other ranges, Adjust
R24B for the "X.01" range, R25B for the "X,ltl range,
R27B for the "X10" range and R28B for the "X100"
range.
On
the "X100" range only, adjust C33 to calibrate
the high end of the band,
Serial
6800
and above; also Serials 6411, 6747, 6750,
6751,
67529
67539
67549
67559
6756,
67579
6758:
C1,2: Change to capacitor, fixed, electrolytic, 20uf,
450
vdcw; -hp- Stock No, 18-20HP, Mfr., CC
Add
capacitor, fixed, electrolytic, 2 sections,
--
20uf/sect,
450
vdcw; -hp- Stock No, 18-22HP, Mfr,, CC
R120
thru
-
Add
resistor, fixed, composition,
150,000
ohms
R123
:
-
+lo%, 2
W;
-hp- Stock No. 25-150K, Mfro, B
See partial schematic below: