Maintenance— 2445 Service
9. Use a soldering iron that is connected to earth ground.
PREVENTIVE
INTRODUCTION
Preventive maintenance consists of cleaning, visual in
spection, and checking instrument performance. When ac
complished regularly, it may prevent instrument malfunction
and enhance instrument reliability. The severity of the envi
ronment in which the instrument is used determines the re
quired frequency of maintenance. An appropriate time to
accomplish preventive maintenance is just before instru
ment adjustment.
GENERAL CARE
The cabinet minimizes accumulation of dust; inside the
instrument and should normally be in place when operating
the 2445. The front cover supplied with the instrument pro
vides both dust and damage protection for the front panel
and crt, and it should be on whenever the instrument is
stored or is being transported.
INSPECTION AND CLEANING
The 2445 should be visually inspected and cleaned as
often as operating conditions require. Accumulation of dirt in
the instrument can cause overheating and component
10.
Use
only
approved
antistatic,
vacuum-type
desoldering tools for component removal.
breakdown. Dirt on components acts as an insulating blan
ket, prevent efficient heat dissipation. It also provides an
electrical conduction path that could result in instrument fail
ure, especially under high-humidity conditions.
A void the use o f chem ical cleaning ag ents which
m ight dam age the plastics used in this instrum ent.
Use a nonresidue-type cleaner, p referably isopropyl
alcohol o r a solution o f 1% m ild d eterg en t with 99%
w ater. B efore using an y o th er type o f cleaner, consult
yo ur Tektronix S ervice C enter o r representative.
Exterior
INSPECTION. Inspect the external portions of the instru
ment for damage, wear, and missing parts; use Table 6-2 as
a guide. Instruments that appear to have been dropped or
otherwise abused should be checked thoroughly to verify
correct operation and performance. Deficiencies found that
could cause personal injury or could lead to further damage
to the instrument should be repaired immediately.
MAINTENANCE
Table 6-2
External Inspection Check List
Item
Inspect For
Repair Action
Cabinet, Lid, Front
Panel
Cracks, scratches, deformations, damaged
hardware or gaskets.
Touch up paint scratches and replace
defective components.
Front-panel Controls
Missing, damaged, or loose knobs, buttons, and
controls.
Repair or replace missing or defective items.
Connectors
Broken shells, cracked insulation, and deformed
contacts. Dirt in connectors.
Replace defective parts. Clear or wash out
dirt.
Carrying Handle
Correct operation.
Replace defective parts.
Accessories
Missing items or parts of items, bent pins,
broken or frayed cables, and damaged
connectors.
Replace damaged or missing items, frayed
cables, and defective parts.
Summary of Contents for 2445
Page 1: ...Tektronix 2445 OSCILLOSCOPE SERVICE INSTRUCTION MANUAL ...
Page 11: ...2445 Service 3829 01 The 2445 Oscilloscope ...
Page 44: ...Theory of Operation 2445 Service 3831 10A Figure 3 1 Block diagram ...
Page 45: ...Theory of Operation 2445 Service 3831 10B Figure 3 1 Block diagram cont 3 3 ...
Page 210: ...3829 58 Figure 9 4 2445 block diagram ...
Page 214: ......
Page 217: ......
Page 219: ...2445 382 72 ...
Page 222: ...2445 ...
Page 231: ...A 1 t C t t F t G t H t ...
Page 233: ......
Page 236: ......
Page 238: ...2445 392 1 75 ...
Page 244: ......
Page 247: ...A 1 C _____ D E F G H J 2445 3811 74 ...
Page 248: ...1 2 3 4 5 6 7 8 9 i o 2445 DISPLAY SEQUENCER TRIG GERING A4B SWEEPS ...
Page 253: ......
Page 263: ... 0 2445 J8 i S ...
Page 264: ...1 2 3 4 5 6 7 i 8 I i 9 10 2445 READOUT ...
Page 275: ......
Page 278: ......
Page 281: ......
Page 283: ... 8VJNR EG 3S 5 fROM P232 5 10 A 15VUNREG 8S F R O Mn i 2445 3 0 2 S 8 I ...
Page 286: ...2445 3823 82 ...
Page 290: ...B H le w o q 87V T S o I R v n i U1 R1873 PARTIAL A9 HIGH VOLTAGE BOARD 2445 ...
Page 299: ...2445 Service DAC REF A5 CONTROL ADJUSTMENT LOCATIONS 3 ...
Page 300: ......
Page 304: ...2 R E TU R N T O 1 ...
Page 305: ...ERROR MESSAGE DIAGNOSTICS ...
Page 306: ...ERROR MESSAGE DIAGNOSTICS ...
Page 307: ...O A A C t rnra g i tiw c t 3829 89 ...
Page 308: ...RETURN TO ...
Page 309: ...FRONT PANEL TROUBLESHOOTING ...
Page 310: ...FRONT PANEL TROUBLESHOOTING ...
Page 311: ...2445 Service 3829 90 ...
Page 316: ...R E TU R N T O v 1 y ...
Page 317: ...SWEEP TROUBLESHOOTING PROCEDURE ...
Page 323: ......
Page 324: ...2445 Service 3829 85 ...
Page 325: ......
Page 326: ... KERNEL NOP DIAGNOSTIC PROCEDURE ...
Page 327: ...10 POWER SUPPLY TROUBLESHOOTING PROCEDURE 3829 94 ...
Page 330: ......
Page 334: ...2445 Service REGULATOR TROUBLESHOOTING PROCEDURE 3829 93 ...
Page 338: ......
Page 346: ...12 2445 SERVICE ...
Page 347: ...2445 SERVICE ...
Page 348: ...2445 SERVICE ...