Maintenance
6- 4
TDS7104 & TDS7054 Service Manual
If the display is very dirty, moisten the wipe with distilled water or a 75%
isopropyl alcohol solution and gently rub the display surface. Avoid using excess
force or you may damage the plastic display surface.
CAUTION.
To prevent getting moisture inside the oscilloscope during external
cleaning, use only enough liquid to dampen the cloth or applicator.
Inspection — Interior.
To access the inside of the oscilloscope for inspection and
cleaning, refer to the
Removal and Installation Procedures
in this section.
Inspect the internal portions of the oscilloscope for damage and wear, using
Table 6--2 as a guide. Defects found should be repaired immediately.
If any circuit board is replaced, check Table 6--2 in Section 5 to see if it is
necessary to adjust the oscilloscope.
CAUTION.
To prevent damage from electrical arcing, ensure that circuit boards
and components are dry before applying power to the oscilloscope.
Table 6- 2: Internal inspection check list
Item
Inspect for
Repair action
Circuit boards
Loose, broken, or corroded
solder connections. Burned
circuit boards. Burned, broken, or
cracked circuit-run plating.
Remove and replace damaged
circuit board.
Resistors
Burned, cracked, broken, blis-
tered condition.
Remove and replace damaged
circuit board.
Solder connections
Cold solder or rosin joints.
Resolder joint and clean with
isopropyl alcohol.
Capacitors
Damaged or leaking cases.
Corroded solder on leads or
terminals.
Remove and replace damaged
circuit board.
Semiconductors
Loosely inserted in sockets.
Distorted pins.
Firmly seat loose semiconduc-
tors. Remove devices that have
distorted pins. Carefully straight-
en pins (as required to fit the
socket), using long-nose pliers,
and reinsert firmly. Ensure that
straightening action does not
crack pins, causing them to
break off.
Summary of Contents for TDS7054
Page 4: ......
Page 14: ...Table of Contents x TDS7104 TDS7054 Service Manual...
Page 18: ...Service Safety Summary xiv TDS7104 TDS7054 Service Manual...
Page 22: ...Preface xviii TDS7104 TDS7054 Service Manual...
Page 56: ...Operating Information 2 12 TDS7104 TDS7054 Service Manual...
Page 60: ...Theory of Operation 3 4 TDS7104 TDS7054 Service Manual...
Page 64: ...Performance Verification 4 4 TDS7104 TDS7054 Service Manual...
Page 76: ...Brief Procedures 4 16 TDS7104 TDS7054 Service Manual...
Page 86: ...Performance Tests Semi Automated Method 4 26 TDS7104 TDS7054 Service Manual...
Page 144: ...Performance Tests 4 84 TDS7104 TDS7054 Service Manual...
Page 160: ...Maintenance 6 6 TDS7104 TDS7054 Service Manual...
Page 230: ...Troubleshooting 6 76 TDS7104 TDS7054 Service Manual...
Page 232: ...Repackaging Instructions 6 78 TDS7104 TDS7054 Service Manual...
Page 238: ...Electrical Parts List 8 2 TDS7104 TDS7054 Service Manual...