Maintenance—2230 Service
6.
Use a 1/16-inch hex wrench to loosen the setscrew
of the HF REJECT knob. Remove the HF REJECT knob.
7.
Use a 1/16-inch hex wrench to loosen the setscrew
of the A TRIGGER LEVEL knob. Remove the A TRIGGER
LEVEL knob.
8.
Unsolder both the resistor to the EXT INPUT center
connector and the wire strap to the EXT INPUT ground
lug.
9.
Unsolder the two wire straps from VAR HOLDOFF
control.
10.
Unsolder the single wire from the PROBE ADJUST
connector and the two wires from the VAR HOLDOFF
control (leading to the Front-Panel circuit board).
11. Remove the following screws:
a. Three screws (and ground strap) securing the
upper part of the Front-Panel circuit board to the front
panel.
b. Two recessed frame-securing screws at the left-
rear corner of the chassis frame.
c. Two bottom screws securing the Main circuit
board to the left bottom side of the chassis frame.
d. One screw securing the delay line to the chassis
frame on the left side of the instrument.
e. Two recessed frame-securing screws at the
right-front corner.
NOTE
A t this point, any component on the Front-Panel cir
cuit board may be accessed for removal and replace
ment. If circuit board replacement is intended, con
tinue with the last two steps 10 and 11.
12.
Pull the left-front frame assembly apart from the
right-rear frame assembly.
NOTE
If a vacuum-desoldering tool is not available, lift each
strap out of the Main circuit board as the joint is
heated.
13.
Use a vacuum-desoldering tool to unsolder the 45
(W9001) wire straps from the Main circuit board (connect
ing to the Front-Panel circuit board).
14.
Remove the Front-Panel circuit board from the
instrument and clean the wire-strap holes on the Main cir
cuit board of any remaining solder.
To reinstall the Front-Panel circuit board, perform the
reverse of the preceding steps.
Main Circuit Board
All components on the Main circuit board are accessible
either directly or by removing either the Storage circuit
board, the crt, the Bottom shield, Attenuator, Timing
circuit-boards assembly, and the Power-Supply shield.
Removal of the Main circuit board is required only when it
is necessary to replace the circuit board with a new- one.
The Main circuit board can be removed and reinstalled
as follows:
1. Perform the "Storage Circuit Board in Servicing
Position” removal procedure.
2. Perform the "Support Chassis” removal procedure.
3. Perform the "Side-Chassis Assembly” removal
procedure.
4. Perform step 3 under the “ Input/Output and Vector
Generator Boards Assembly" removal procedure.
5.
Disconnect the three-wire B DELAY TIME POSI
TION potentiometer connector (P9644) from the Main cir
cuit board (located on the right side of the Main circuit
board).
6.
Perform the “ Alternate Sweep Circuit Board" remo
val procedure.
7.
Disconnect the connectors from the Attenuator and
Timing circuit boards assembly, noting their locations for
reinstallation reference.
8.
Remove three screws and one spacer securing the
Bottom shield to the Main circuit board.
6 -4 5
Summary of Contents for 2230
Page 12: ...2230 Service X The 2230 Digital Storage Oscilloscope 4998 01 ...
Page 33: ...Operating Information 2230 Service Figure 2 5 Vertical controls and connectors 2 6 ...
Page 48: ...Operating Information 2230 Service Figure 2 11 X Y Plotter interfacing ...
Page 56: ...Theory of Operation 2230 Service 4999 01 3 2 Figure 3 1 Simplified block diagram ...
Page 68: ...Operating Information 2230 Service Figure 2 11 X Y Plotter interfacing ...
Page 76: ...Theory of Operation 2230 Service 4999 01 3 2 Figure 3 1 Simplified block diagram ...
Page 98: ...Theory of Operation 2230 Service 499 9 06 Figure 3 6 Horizontal Amplifier block diagram 3 24 ...
Page 111: ...Theory of Operation 2230 Service 3 37 Figure 3 9 Acquisition Memory timing ...
Page 190: ...Maintenance 2230 Service 999 14 Figure 6 3 Isolated kernel timing 6 9 ...
Page 329: ...PUT Figure 9 2 S em ico n d u cto r lea d co n fig u ratio n s ...
Page 332: ...2230Service CHASSIS MOUNTED PARTS ...
Page 334: ...A14 CH 1 LOGIC BOARD ...
Page 337: ......
Page 344: ...u sr z z o 1 ...
Page 347: ...i n 5 a O Q q o u S a o h UJ s a b c d e f g h j k l m n ...
Page 352: ......
Page 355: ...WAVEFORMS FOR DIAGRAM 5 4999 83 ...
Page 358: ...I W L U O U rc a 4 2 s ...
Page 361: ...WAVEFORMS FOR DIAGRAM 6 S 84 ...
Page 362: ...2230 Service TEST SCOPE TRIGGERED ON U665 PIN 8 FOR WAVEFORMS 31 THROUGH 33 ...
Page 365: ... I I ...
Page 366: ...A 1 6 S W E E P R EFEREN CE BOARD FIG 9 17 2230 Service Figure 9 17 A16 Sweep Reference board ...
Page 369: ... o 0 UJU sa eg aiu c u J in su eg 5 C sis n g e s o N QO ...
Page 371: ...Static Sensitive Devices See Maintenance Section CM I rv CD o 2230 Service ...
Page 378: ......
Page 384: ... I I c o C u o a 5 r O tD v j If 3 IV if I I ci if 5 3 I ...
Page 386: ......
Page 388: ...H K L M N 7 8 8 2 2 3 0 INPUT OUTFUT WIRING INTERCONNECT ...
Page 392: ...W A V E F O R M S F O R D IA G R A M 14 ...
Page 393: ...2230Service 0 0 d s t 4 9 9 9 9 5 ...
Page 394: ...2230 Service TEST SCOPE TRIGGERED ON U911 PIN 21 FOR WAVEFORMS 64 THROUGH 69 4999 92 ...
Page 396: ... ...
Page 397: ...WAVEFORMS FOR DIAGRAM 15 TEST SCOPE TRIGGERED ON U9111 PIN 21 FOR WAVEFORMS 70 THROUGH 77 ...
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Page 409: ......
Page 415: ...IMF PU TPR A IR TM FQ U I W A V E F O R M SF O RO IA G R A M1 5 W A V E F O R M SF O R i ...
Page 417: ...4999 9S ...
Page 419: ...i s 5 0 C C p F 2 CC p 2 a u 4 I s c c O 2 e e o 5 a o 5 i 2 i f 2 E C 52 ...
Page 423: ...W A V E F O R M SF O RD IA G R A M1 8 O c n ...
Page 424: ...Figure 9 22 A11A1 Input Output board ...
Page 430: ...Figure 9 23 A11A2 Vector Generator board ...
Page 434: ...49 9 9 tOO ...
Page 436: ......
Page 437: ...22 3 0 S ervice W A V E F O R M S F O R D I A G R A M 2 1 m f n h ...
Page 442: ...WAVEFORMS FOR DIAGRAM 22 4999 78 ...
Page 443: ...XY PLOTTER BOARD DIAGRAM 22 See Parts List for serial number ranges ...
Page 447: ...A21 RS 232 OPTION BOARD Flfi A 9 K 01 01 W M ...
Page 450: ......
Page 452: ...COMPONENT NUMBER EXAMPLE ...
Page 459: ...A16 SWEEP REFERENCE ADJUSTMENT LOCATION ...
Page 467: ...2230 Service ...
Page 468: ......
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Page 475: ...2230 Service ...
Page 476: ...2230 Service ...
Page 477: ... D ...
Page 483: ...2230 Service ...