TM 11-6625-3145-14
Maintenance: General Information-318/338 Service
DISASSEMBLY/INSTALLATION PROCEDURES
WARNING
Dangerous electric-shock hazards inside the mainframe may be exposed when the
covers are removed. Be sure power is off and the power cord is disconnected
before removing the covers. Disassembly procedures should only be attempted by
qualified service personnel.
Reassembly procedures are the reverse of the disassembly procedures in most cases. Separate reassembly instructions
are provided only when necessary.
Unless otherwise noted, screws mentioned in the text are the pan-head, POZIDRIV type.
In the following procedures, directional terms (top, bottom, left, right, etc.) are based on the assumption that the 318/338 is
in a normal, upright position and the user is facing the front of the instrument.
GENERAL DISASSEMBLY PRECAUTIONS
•
DO NOT attempt any disassembly or installation procedures if the power is on.
•
DO NOT disconnect probes from the mainframe by pulling on the cables; pull only on the plastic cable
holders.
•
DO NOT remove connectors between circuit boards by pulling on the wires; pull only on the connectors.
•
DO NOT press or pull on components when manipulating circuit boards.
•
GUARD against static discharge damage by following the precautions listed under
Maintenance Precautions
earlier in this section.
CIRCUIT BOARD LOCATIONS
Figure 6-3 shows the location of the circuit boards within the instrument.
COMPONENT LOCATIONS
In Section 10, Diagrams, of this manual you will find each circuit diagram and an illustration of the circuit board on which
the layout of components are identified by their circuit numbers. Tables listing each component by its circuit number are
also provided. These tables enable rapid location of components on both the circuit diagrams and the circuit board
illustrations by listing the grid coordinates.
6-7
Summary of Contents for 318
Page 119: ...318 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 182: ...338 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 253: ...318 ___________________ TROUBLESHOOTING TREES ...
Page 344: ...338 TROUBLESHOOTING TREES ...
Page 517: ...TM 11 6625 3145 14 318 338 4434 923 318 Block Diagram ...
Page 518: ...TM 11 6625 3145 14 318 338 4434 924 338 Block Diagram ...
Page 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
Page 520: ...TM 11 6625 3145 14 318 338 4434 926 318 338 Mainframe Wiring Diagram ...
Page 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
Page 522: ...TM 11 6625 3145 14 318 338 4434 928 Figure 9 1 318 A01 Input A Board Component Locations ...
Page 526: ...TM 11 6625 3145 14 ...
Page 528: ...TM 11 6625 3145 14 Figure 9 3 318 338 A03 ACQ Control Board Component Locations ...
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Page 542: ...TM 11 6625 3145 14 Figure 9 8 318 338 A10 CRT Board Component Locations ...
Page 544: ...TM 11 6625 3145 14 Figure 9 9 318 338 A11 Inverter Board component Locations ...
Page 546: ...TM 11 6625 3145 14 Figure 9 10 318 338 A12 Regulator Board Component Locations ...
Page 551: ...TM 11 6625 3145 14 Figure 9 12 338 A01 Input A Board Component Locations ...
Page 553: ...TM 11 6625 3145 14 318 338 SERVICE ...
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Page 555: ...PIN 058584 ...