Maintenance
6–4
TDS 340A, TDS 360 & TDS 380 Technical Reference
Table 6–2: Internal inspection check list
Item
Inspect for
Repair action
Circuit boards
Loose, broken, or corroded solder connec-
tions. Burned circuit boards. Burned, broken,
or cracked circuit-run plating
Remove the failed module and replace it with
a new module
Resistors
Burned, cracked, broken, or blistered condition
Remove the module with the faulty resistor
and replace it with a new module
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 the module with the faulty capacitor
and replace it with a new module from the
factory
Wiring and cables
Loose plugs or connectors. Burned, broken, or
frayed wiring
Firmly seat connectors. Repair or replace
modules with defective wires or cables
Chassis
Dents and deformations
Straighten, repair, or replace chassis
STOP
. If, after doing steps 1 and 2, a module is clean upon inspection, skip the
remaining steps.
1. Blow off dust with dry, low-pressure, deionized air (approximately 9 psi).
2. Remove any remaining dust with a lint free cloth dampened in isopropyl
alcohol (75% solution) and rinse with warm deionized water. (A cotton-
tipped applicator is useful for cleaning in narrow spaces and on circuit
boards.)
NOTE
. If steps 1 and 2 do not remove all the dust or dirt, the oscilloscope may be
spray washed using a solution of 75% isopropyl alcohol by doing steps 3
through 7.
3. Gain access to the parts to be cleaned by removing easily accessible shields
and panels (see Removal and Replacement procedures).
4. Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the
majority of the alcohol to evaporate.
5. Use hot (120
_
F to 140
_
F or 48.9
_
C to 60
_
C) deionized water to
thoroughly rinse them.
6. Dry all parts with low-pressure, deionized air.
7. Dry all components and assemblies in an oven or drying compartment using
low-temperature (125
_
F to 150
_
F or 51.7
_
C to 65.5
_
C) circulating air.
Cleaning Procedure —
Interior
Summary of Contents for TDS 340A
Page 4: ......
Page 12: ...Contents viii TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 16: ...Service Safety Summary xii TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 19: ......
Page 32: ......
Page 42: ...Operating Information 2 10 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 43: ......
Page 49: ...Theory of Operation 3 6 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 59: ...Theory of Operation 3 16 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 60: ......
Page 82: ...Performance Tests 4 22 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 83: ......
Page 91: ...Adjustment Procedures 5 8 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 92: ......
Page 140: ...Troubleshooting 6 48 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 142: ...Repackaging Instructions 6 50 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 143: ......
Page 148: ......
Page 206: ...Electrical Parts List 8 58 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 207: ......
Page 210: ...TDS 340A 360 380 OPTION BOARD BLOCK DIAGRAM A2 0 ...
Page 211: ......
Page 212: ...OPTION BUS AND GPIB A2 TDS 340A 360 380 1 ...
Page 213: ......
Page 214: ...TDS 340A 360 380 ROM PRINTER AND RS 232 A2 2 ...
Page 216: ...PRINTER POWER A3 1 TDS 340A 360 380 OPTION 14 ...
Page 218: ...A5 1 FLOPPY INTERFACE TDS 340A 360 380 ...
Page 222: ...CPU A6 TDS 340A 360 380 1 ...
Page 223: ......
Page 224: ...A6 TDS 340A 360 380 2 FPP POTS ...
Page 225: ......
Page 226: ...LEDS DRIVER A6 TDS 340A 360 380 3 ...
Page 227: ......
Page 228: ...SWITCHES A6 TDS 340A 360 380 4 ...
Page 233: ...9 26 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 234: ...ROOT SHEET A11 A12 TDS 340A 360 0 ...
Page 235: ......
Page 236: ...TRIGGERS A11 A12 TDS 340A 360 1 TDS 340A ...
Page 237: ......
Page 238: ...ATTENUATORS A11 A12 TDS 340A 360 2 TDS 340A TDS 340A ...
Page 239: ......
Page 240: ...TRIGGER LOGIC AND TIME INTERPOLATOR A11 A12 TDS 340A 360 3 ...
Page 241: ......
Page 242: ...TIME BASE CONTROLLER A11 A12 TDS 340A 360 4 ...
Page 243: ......
Page 244: ...SAMPLER A11 A12 TDS 340A 360 5 ...
Page 245: ......
Page 246: ...CPU A11 A12 TDS 340A 360 6 TDS 340A ...
Page 247: ......
Page 248: ...DISPLAY A11 A12 TDS 340A 360 7 ...
Page 252: ...MAIN BLOCK DIAGRAM A13 TDS 380 0 MAIN BOARD 671 3753 00 389 2154 00 ...
Page 253: ......
Page 254: ...TRIGGERS A13 TDS 380 1 ...
Page 255: ......
Page 256: ...ATTENUATORS A13 TDS 380 2 ...
Page 257: ......
Page 258: ...TRIGGER LOGIC AND TIME INTERPOLATOR A13 TDS 380 3 ...
Page 259: ......
Page 260: ...TIMEBASE A13 TDS 380 4 ...
Page 261: ......
Page 262: ...SAMPLER A13 TDS 380 5 ...
Page 263: ......
Page 264: ...CPU A13 TDS 380 6 ...
Page 265: ......
Page 266: ...DISPLAY A13 TDS 380 7 ...
Page 269: ...9 62 TDS 340A TDS 360 TDS 380 Technical Reference ...
Page 270: ...MONITOR BLOCK DIAGRAM A26 TDS 340A 360 380 0 ...
Page 271: ......
Page 272: ...INPUTS VIDEO AND VERTICAL DEFLECTION A26 TDS 340A 360 380 1 ...
Page 273: ......
Page 274: ......
Page 286: ...Mechanical Parts List 10 12 TDS 340A TDS 360 TDS 380 Technical Reference ...
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Page 288: ......