TM 9-6625-474-14&P-3
MAINTENANCE
GENERAL MAINTENANCE INFORMATION
Static-Sensitive Components
Static discharge can damage any
component in this instrument.
semiconductor
This instrument contains electrical components that
are susceptible to damage from static discharge See
Table 5-1 for relative susceptibility of various classes of
semiconductors. Static voltages of 1 kV to 30 kV are
common in unprotected environments.
Observe the following precautions to avoid damage:
1. Minimize handling of static-sensitive components.
2. Transport and store static-sensitive components or
assemblies in their original containers, on a metal rail, or
on conductive foam. Label any package that contains
static-sensitive assemblies or components.
3. Discharge the static voltage from your body by
wearing a wrist strap while handling these components.
Servicing static-sensitive assemblies or components
should be performed only at a static-free work station by
qualified service personnel.
4. Nothing capable of generating or holding a static
charge should be allowed on the work station surface.
5. Keep the component leads shorted together
whenever possible.
6. Pick up components by the body, never by the leads.
7. Do not slide the components over any surface.
8. Avoid handling components in areas that have a
floor or work surface covering capable of generating a
static charge.
9. Use a soldering iron that is connected to earth
ground.
10. Use only special antistatic suction type or wick
type resoldering tools.
Relative Susceptiblity to
Static Discharge Damage
equivalent for levels:
1 = 1oo to 500
V
4=500 V
7 = 400 to 1000 V (est.)
2 = 200 to 500
V
5 = 400 to 600 V
8 = 900 V
3 = 250 V
6 = 600 to 800 V
9 = 1200
V
(Voltage discharged from a 100 pF capacitor through a
resistance of 100 ohms.)
Cleaning
This instrument should be cleaned as often as
operating conditions require. Loose dust accumulated on
the outside of the instrument can be removed with a soft
cloth or small brush. Remove dirt that remains with a soft
cloth dampened in a mild detergent and water solution. Do
not use abrasive cleaners.
Summary of Contents for DC503a
Page 1: ...e x _ 1 v w W i L ...
Page 16: ...DC 503A DC 503A Universal Counter Timer REV A FEB 1981 XIV ...
Page 27: ...Fig 2 2 Controls and connectors Operating Instructions DC 503A 2977 fli English 2 3 ...
Page 39: ...Fig 2 2 Commandes et prises Instructions d utilisation DC 503A French 2 3 ...
Page 51: ...Abb 2 2 Bedienungselemente and Anschliisse Bedienungsanleitung DC 503A German 2 3 ...
Page 63: ...Fig 2 2 Controls and connectors Operating Instructions DC 503A 2971 01 Japanese 2 3 ...
Page 125: ...Fig 8 2 Auxiliary Board A12 Assy ADJUSTMENT LOCA 2971 1 6 ...
Page 169: ...SEE END OF MPL FOR WIRE ASSEMBLIES O1 0 pG C 0 DC 503A ...
Page 186: ...0 2 TM 9 6625 474 14 P 3 Fig 0 1 DC 503A Universal Counter Timer ...
Page 188: ...Table 1 1 1 2 TM 9 6625 474 14 P 3 ...
Page 189: ...Table 1 1 1 3 TM 9 6625 474 14 P 3 ...
Page 190: ...Table 1 1 1 4 TM 9 6625 474 14 P 3 ...
Page 191: ...Table 1 1 1 5 TM 9 6625 474 14 P 3 ...
Page 192: ...1 6 Table 1 1 TM 9 6625 474 14 P 3 ...
Page 193: ...Table 1 1 1 7 Table 1 2 Table 1 3 TM 9 6625 474 14 P 3 ...
Page 194: ...Table 1 3 Table 1 4 1 8 TM 9 6625 474 14 P 3 ...
Page 197: ...2 3 TM 9 6625 474 14 P 3 Fig 2 2 Controls and connectors ...
Page 211: ...3 5 Fig 3 1 TM 9 6625 474 14 P 3 ...
Page 219: ...4 2 TM 9 6625 474 14 P 3 Table 4 1 LIST OF TEST EQUIPMENT REQUIREMENTS ...
Page 240: ...5 7 TM 9 6625 474 14 P 3 Fig 5 9 Rear interface connector assignments ...
Page 256: ...8 3 8 4 blank TM 9 6625 474 14 P 3 ...
Page 257: ...8 5 8 6 blank TM 9 6625 474 14 P 3 ...
Page 258: ...Fig 8 2 Fig 8 1 8 7 8 8 blank TM 9 6625 474 14 P 3 ADJUSTMENT LOCATIONS ...
Page 260: ...TM 9 6625 474 14 P 3 8 11 8 12 blank ...
Page 262: ...TM 9 6625 474 14 P 3 8 15 8 16 blank ...
Page 263: ...8 17 8 18 blank TM 9 6625 474 14 P 3 Table 8 3 COMPONENT REFERENCE CHART See Fig 8 3 ...
Page 264: ...8 19 8 20 blank TM 9 6625 474 14 P 3 ...
Page 265: ...8 21 8 22 blank TM 9 6625 474 14 P 3 Table 8 4 COMPONENT REFERENCE CHART See Fig 8 3 ...
Page 266: ...8 23 8 24 blank TM 9 6625 474 14 P 3 ...
Page 267: ...8 25 8 26 blank TM 9 6625 474 14 P 3 DC 503A Table 8 5 COMPONENT REFERENCE CHART See Fig 8 4 ...
Page 268: ...8 27 8 28 blank TM 9 6625 474 14 P 3 ...
Page 269: ...8 29 8 30 blank TM 9 6625 474 14 P 3 DC 503A Table 8 6 COMPONENT REFERENCE CHART See Fig 8 3 ...
Page 270: ...8 31 8 32 blank TM 9 6625 474 14 P 3 ...
Page 271: ...8 33 8 34 blank TM 9 6625 474 14 P 3 DC 503A Table 8 7 COMPONENT REFERENCE CHART See Fig 8 4 ...
Page 272: ...8 35 8 36 blank TM 9 6625 474 14 P 3 ...
Page 274: ...8 39 8 40 blank TM 9 6625 474 14 P 3 ...
Page 275: ...8 41 8 42 blank TM 9 6625 474 14 P 3 DC 503A Table 8 9 COMPONENT REFERENCE CHART See Fig 8 3 ...
Page 276: ...8 43 8 44 blank TM 9 6625 474 14 P 3 ...
Page 277: ...8 45 8 46 blank TM 9 6625 474 14 P 3 DC 503A Table 8 10 COMPONENT REFERENCE CHART See Fig 8 4 ...
Page 278: ...8 47 8 48 blank TM 9 6625 474 14 P 3 ...
Page 291: ...D 1 TM 9 6625 474 14 P 3 APPENDIX D MANUAL CHANGE INFORMATION ...
Page 292: ...D 2 TM 9 6625 474 14 P 3 ...
Page 293: ...D 3 TM 9 6625 474 14 P 3 P a g e 1 o f 2 ...
Page 294: ...Page 2 D 4 TM 9 6625 474 14 P 3 ...
Page 296: ...D 6 TM 9 6625 474 14 P 3 ...
Page 298: ......
Page 299: ...THE METRIC SYSTEM AND EQUIVALENTS ...
Page 300: ...PIN 056816 000 ...