T&FI-2
Page 101
Aug 20/2002
Matsushita Avionics Systems Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
TESTING AND FAULT ISOLATION - PART 2
1. General
A. This section gives the procedures for functional testing and fault
isolation of the Video Modulator Units (VMU) shown on the title page with
the RD-AX8303 VMU Tester and the MD2HD256199A VMU tester software.
Refer to the TESTING AND FAULT ISOLATION - PART 1 section for the
procedures with the RD-AX8303 VMU Tester and the VMU tester software,
MD2HD256005A or after.
B. Do the functional testing first to find if the unit is serviceable or
must be repaired. If the unit must be repaired, the functional testing
also tells you the nature of malfunction, and you will use this data to
examine and repair the unit. You must do the functional testing again on
the repaired unit to make sure that the unit is serviceable.
C. The printed circuit card assemblies that are installed in the VMU are as
follows:
DESIGNATION FULL NAME QUANTITY
A1 card CPU card assembly 1
A2 card Modulator card assembly 12
A3 card RF power card assembly 1
A4 card Power card assembly 1
A5 card Mother card assembly 1
A6 card Fuse card assembly 1
A7 card Connector card assembly 1
A8 card Video signal generator card assembly 1
For these printed circuit card assemblies, we use their designations only
(A1 card, A2 card, etc.) as their names.
D. The wiring and schematic diagrams of the VMU are given at the end of the
TESTING AND FAULT ISOLATION - PART 1 section.
E. We give the IPL figure-item numbers in square brackets [ ] after the
assembly or part names as necessary. We do not give alpha-variant item
numbers if they are not shown on the IPL figures.
T&FI-2
Page 102
Feb 20/2002
Matsushita Avionics Systems Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
F. Special Terms and Abbreviations
In this section, we will use the terms and abbreviations given below:
TERM DEFINITION
OMM TZZX830800 Operation and Maintenance Manual for RD-AX8308 VMU Tester.
Tester RD-AX8308 VMU Tester.
Tester program VMU tester program.
PC Personal computer you use with the tester.
Key One of the keys on the keyboard connected to the PC.
PC's screen Display screen of the VGA color monitor connected to the PC.
UUT VMU under test.
VMU Video modulator unit in general.
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