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Adjustment Procedure— 2236 Service
e.
Repeat parts a through d until there is no trace shift
when changing the CH 2 VOLTS/DIV switch from 5 mV to 2
mV.
f. Set the VERTICAL MODE switch to CH 1.
g.
Repeat parts a through e for Channel 1, adjusting Ch 1
2/5-mV Dc Bal (R33) in part d.
3. Adjust Channel 1 Variable Balance (R25)
a. Set both VOLTS/DIV switches to 10 mV.
b.
Rotate the CH 1 VOLTS/DIV Variable control fully
counterclockwise.
c.
Position the trace on the center horizontal graticule line
using the Channel 1 POSITION control.
d.
Rotate the CH 1 VOLTS/DIV Variable control clock
wise to the CAL detent.
e.
ADJUST— Ch 1 Var Bal (R25) to set the trace to the
center horizontal graticule line.
f.
Repeat parts b through e until there is no trace shift
between the fully clockwise and the fully counterclockwise
positions of the CH 1 VOLTS/DIV Variable control.
g.
Return the CH 1 VOLTS/DIV Variable control to the
CAL detent.
4. Adjust Channel 2 Invert Balance (R75)
a. Set the VERTICAL MODE switch to CH 2.
f.
Repeat parts b through e until there is no trace shift
when switching the INVERT button between the On and Off
positions.
g.
Repeat Steps 2 and 3 for Channel 1 until no further
improvement is noted.
h.
Repeat Steps 2 and 4 for Channel 2 until no further
improvement is noted.
5. Adjust MF/LF Compensation and Gain Balance
(C53, R97, C3, and R47)
a. Set:
VERTICAL MODE
CH 2
VOLTS/DIV (both)
10 mV
Input Coupling (both)
DC
A SEC/DIV
20 tis
b.
Connect the high-amplitude square wave output via a
50-fl cable, a 10X attenuator, and a 50-G termination to the
CH 2 OR Y input connector.
c.
Set the generator to produce a 10-kHz, 5-division
display.
d.
Set the top of the display on the center horizontal
graticule line using the Channel 2 POSITION control.
e.
ADJUST— Ch 2 MF/LF Comp (C53) and Ch 2 MF/LF
Gain Bal (R97) for the best front corner and flat top.
f.
Move the cable from the CH 2 OR Y input connector to
the CH 1 OR X input connector. Set the VERTICAL MODE
switch to CH 1.
g. Set the top of the display on the center horizontal
b. Position the trace on the center horizontal graticule
9raticule line usin9 the Channel 1 POSITION controL
line using the Channel 2 POSITION control.
NOTE
c. Set the INVERT button to On (button in).
if C3 needs to be adjusted in the following step, the
DMM Channel 1 Volts accuracy will be affected. After
performing part h. Step 6 in the “CTM" section must
d. ADJUST— Ch 2 Invert Bal (R75) to set the trace to the
be checked to assure DMM accuracy.
center horizontal graticule line.
h.
ADJUST—Ch 1 MF/LF Comp (C3) and Ch 1 MF/LF
Gain Bal (R47) for the best front corner and flat top.
5-7
e. Set the INVERT button to Off (button out).
Summary of Contents for 2236
Page 10: ...2236 Service viii The 2236 Oscilloscope ...
Page 74: ...Theory of Operation 2236 Service 3 30 ...
Page 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Page 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Page 243: ...DMM POWER S U P P LIE S 2236 Service F ig u re 9 7 C T M d e ta ile d b lo c k diag ram ...
Page 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Page 267: ...1 2 3 4 5 6 7 8 9 J T K L M_ _ ___ N___l _ P____l S ...
Page 271: ...1 2 3 4 5 6 7 8 9 lO P2SO O U1 A TRIGGER V T O W2500 5 A 223 R E V A P R W G ...
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Page 285: ...A 6 F IL T E R B O A R D lo c a te d u n d e r H V S h ie ld ...
Page 313: ...2236 Service T O U I 3 0 0 4 8 K T O UI300 II S K 0 2 2 3 6 Z Z O A Z 2 OPTION IA ...
Page 317: ...A 10 C O U N T E R T IM E R M U L T IM E T E R B O A R D A D J U S T M E N T LO C A T IO N S ...
Page 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
Page 323: ...9 ...
Page 324: ...2 REV APR 1986 ...
Page 325: ...2236 SERVICE ...
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Page 333: ...2236 SERVICE ...
Page 334: ...2 4 2 1 ...
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