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TM 11-6625-3145-14
Theory of Operation-318/338 Service
POWER SUPPLY (A11AND A12)
The power supply provides dc voltages of -3.3 V, -12 V, + 12 V, -5 V, -2 V, and +5 V to operate the 318/338 circuitry. It
also supplies voltage for the fan motor. It operates in the line input range of either 90 to 132 V ac or 180 to 250 V ac at 48
Hz to 440 Hz single-phase.
LEFT-SIDE PANEL
A BNC connector for video-output is mounted on the left side panel. The BNC is connected to the MPU/Display board
through the Mother board. If option 01 is installed (318S1/338S1), a second BNC connector for the P6107 serial data
probe and a 25-pin male connector for the RS-232C port are added.
318S1/338S1 (A07)
The 318S1/338S1 Logic Analyzer has the I/O circuit board (A07) plugged into J7 of the Mother board. The 318S1/338S1
contains three added functions:
• Serial State Analysis
• RS-232C Interface (Remote)
• Non-Volatile Memory
Serial Input Comparator. Serial data from the P6107 serial data probe is supplied to the serial input comparator and is
converted to a TTL-level signal.
Serial I/O Controller. The Serial Input/Output (SIO) controller handles serial-to-parallel conversions. The SIO contains
two serial data transceivers, Port-A and Port-B. Port-A is used for serial data acquisition and Port-B is for RS-232C
control.
DETAILED CIRCUIT DESCRIPTIONS FOR THE 318
The following paragraphs contain theory of operation information for the 318 Logic Analyzer. For information on the theory
of operation for the 338 Logic Analyzer, refer to the Table of Contents and following sections of this chapter.
318 A01 INPUT A BOARD <1> <2>
A02 INPUT B BOARD <3> <4>
The Input section consists of the Input A (A01) and the Input B (A02) boards. The block diagram for these boards is
shown in Figure 4-1. Since both of these boards share the same function, they are discussed as a unit in this description.
OVERVIEW
Refer to schematics <1> and <3>. The acquisition stages consist of 16 discrete units that perform data sampling and
glitch recognition. Sixteen channels of data to be sampled come into the unit from the P6451 parallel data probe. Each of
the acquisition stages feeds data to the acquisition RAM where it can be read by the MPU. The same data from the
parallel data probe is supplied to the glitch recognition lines, and the 16 glitch recognition outputs are combined and
applied to the glitch trigger circuits.
To help explain the operation of the data channels, we will trace the operation of channel 8. Refer to the schematic <3>.
4-5
Содержание 318
Страница 119: ...318 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Страница 182: ...338 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Страница 253: ...318 ___________________ TROUBLESHOOTING TREES ...
Страница 269: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service Figure 7 7 318 Word recognizer test ...
Страница 278: ...TM 11 6625 3145 14 Maintenance Troubleshooting 31 8 338 Service Figure 7 10 318 N and DELAY counter test 7 25 ...
Страница 313: ...TM 11 6625 3145 14 Figure 7 19 Troubleshooting Tree 8 Data Acquisition ACQ A01 A02 Sheet 4 of 6 7 60 ...
Страница 344: ...338 TROUBLESHOOTING TREES ...
Страница 362: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service 4434 567 Figure 7 39 338 Word recognizer test 7 109 ...
Страница 371: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service 4434490 Figure 7 42 338 N and DELAY counter test 7 118 ...
Страница 421: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service Figure 7 55 Troubleshooting Tree 12 T H A01 A02 7 169 ...
Страница 517: ...TM 11 6625 3145 14 318 338 4434 923 318 Block Diagram ...
Страница 518: ...TM 11 6625 3145 14 318 338 4434 924 338 Block Diagram ...
Страница 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
Страница 520: ...TM 11 6625 3145 14 318 338 4434 926 318 338 Mainframe Wiring Diagram ...
Страница 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
Страница 522: ...TM 11 6625 3145 14 318 338 4434 928 Figure 9 1 318 A01 Input A Board Component Locations ...
Страница 526: ...TM 11 6625 3145 14 ...
Страница 528: ...TM 11 6625 3145 14 Figure 9 3 318 338 A03 ACQ Control Board Component Locations ...
Страница 532: ...TM 11 6625 3145 14 ...
Страница 536: ...TM 11 6625 3145 14 ...
Страница 538: ...TM 11 6625 3145 14 ...
Страница 539: ...TM 11 6625 3145 14 ...
Страница 540: ...TM 11 6625 3145 14 ...
Страница 541: ...TM 11 6625 3145 14 ...
Страница 542: ...TM 11 6625 3145 14 Figure 9 8 318 338 A10 CRT Board Component Locations ...
Страница 544: ...TM 11 6625 3145 14 Figure 9 9 318 338 A11 Inverter Board component Locations ...
Страница 546: ...TM 11 6625 3145 14 Figure 9 10 318 338 A12 Regulator Board Component Locations ...
Страница 548: ...TN 11 6625 3145 14 Figure 9 11 318S1 338S1 A07 Serial RS232 Non Volatile Memory Board Component Locations ...
Страница 551: ...TM 11 6625 3145 14 Figure 9 12 338 A01 Input A Board Component Locations ...
Страница 553: ...TM 11 6625 3145 14 318 338 SERVICE ...
Страница 554: ......
Страница 555: ...PIN 058584 ...