Maintenance— 2236 Service
8.
Pull the Timing circuit board straight back from the
front of the instrument until the circuit board interconnecting
pins are disengaged and the switch shaft is clear of the
Front-Panel circuit board.
To reinstall the Timing circuit board, perform the follow
ing steps:
9.
Insert the SEC/DIV switch shaft through the hole in
the Front-Panel circuit board, ensuring that the intercon
necting pins are aligned with the Front-Panel connectors.
Push the Timing circuit board forward into position.
10.
Reinstall three screws securing the Timing circuit
board to the Bottom shield (removed in step 7).
11.
Reinstall the remaining screw at the rear of the
Attenuator circuit board securing both the Attenuator and
the Timing circuit boards to the Bottom shield (removed in
step 6).
12.
Reconnect two connectors to the Timing circuit
board (disconnected in step 5).
13.
Reinstall the A SEC/DIV dial in the position noted in
step 3 and secure it with two set screws lossened in step 4.
14.
Reinstall the collet and the B SEC/DIV knob at the
position noted in step 3 and secure it with the nut.
15.
Reinstall the SEC/DIV Variable knob onto its shaft
(with lettering horizontal and right-side up) and tighten the
set screw.
16.
Unlock the CTM circuit board and lower it into the
instrument (see “CTM Circuit Board” removal procedure).
Bottom Shield, Attenuator and Timing Circuit Board
Module
Removal of the module consisting of the Bottom shield
and the Attenuator and Timing circuit boards is accom
plished by the following steps:
1. Lift up and secure the CTM circuit board (see “CTM
Circuit Board” removal procedure).
2.
Perform steps 2 through 8 of the “Attenuator and CH
1 Logic Switch Circuit Board” removal procedure.
3.
Perform steps 2 through 5 of the “Timing Circuit
Board” removal procedure.
4.
Place the instrument on its side and remove four
screws holding the Bottom shield to the Main circuit board.
5.
Pull the Bottom shield, along with the attached circuit
boards straight back from the front of the instrument until
the interconnecting pins on the circuit boards are disen
gaged and the switch shafts are clear of the holes in the
Front-Panel circuit board; then lift out the entire assembly
through the top of the instrument.
6.
If accessibility to the bottom of either the Attenuator
or the Timing Circuit board is desired, refer to step 9 of the
“Attenuator and CH 1 Logic Switch Circuit Boards” removal
procedure and to steps 6 and 7 of the “Timing Circuit
Board” removal procedure.
To reinstall the Bottom-shield-Attenuator-Timing assem
bly, perform the following steps:
7.
If one or both of the circuit boards was removed, rein
stall the circuit board(s) to the Bottom shield by referring to
step 12 of the “Attenuator and CH 1 Logic Switch Circuit
Boards” reinstallation procedure and to steps 10 and 11 of
the “Timing Circuit Board” reinstallation procedure.
8.
Insert the three switch shafts through the holes in
both the Front-Panel circuit board and the front panel (refer
to the “Attenuator and CH 1 Logic Switch Circuit Boards”
and the “Timing Circuit Board” reinstallation procedures).
9.
Reinstall the four screws holding the Bottom shield to
the Main circuit board (removed in step 4).
10.
Perform steps 13 through 15 of the “Attenuator and
CH 1 Logic Switch Circuit Boards” reinstallation procedure
and step 12 of the of the “Attenuator Circuit Board"
reinstallation procedure and steps 13 through 15 of the
“Timing Circuit Board” reinstallation procedure.
Front-Panel Circuit Board
1. Remove the CTM circuit board (see the “CTM Circuit
Board” removal procedure).
2. Remove the crt (see the “Cathode-Ray Tube” removal
procedure).
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Содержание 2236
Страница 10: ...2236 Service viii The 2236 Oscilloscope ...
Страница 28: ...Specification 2236 Service 1 18 ADD JAN 1985 Figure 1 2 Physical dimensions of the 2236 Oscilloscope ...
Страница 74: ...Theory of Operation 2236 Service 3 30 ...
Страница 75: ...Theory of Operation 2236 Service Figure 3 13 Typical waveforms for the Delta Time function with Valt HI 3 31 ...
Страница 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Страница 240: ...2236 Service CTM INTERFACE SIGNALS F ig u re 9 4 O s c illo s c o p e b a sic b lo c k diag ram 4294 46 ...
Страница 241: ... VERT DEFL 2236 Service 4 2 0 6 3 5 4 2 0 4 4 7 F ig u re 9 5 O scillo sco p e d e ta ile d b lo c k diag ram ...
Страница 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Страница 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 ...
Страница 253: ...A10 COUNTER TIMER MULTIMETER BOARD F ig u re 9 8 C irc u it b o a rd lo c a tio n Illu s tra tio n ...
Страница 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Страница 255: ...2 2 3 6 S e rv ic e A ll c o m p o n e n ts on th e A 2 A tte n u a to r b o a rd are lo c a te d on D ia g r a m ...
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Страница 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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Страница 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 ...
Страница 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 ...
Страница 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
Страница 323: ...9 ...
Страница 324: ...2 REV APR 1986 ...
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