M800-00
T807/808 Introduction To Servicing
B3.1
Copyright TEL
31/08/96
3
T807/808 Introduction To Servicing
This section provides specific information on servicing procedures for the T807/808 and
should be read in conjunction with Part A (General Servicing Procedures) of this man-
ual.
The following topics are covered in this section.
Section
Title
Page
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
General
Warning: Lethal Voltages
Caution: Ventilation
Caution: Replacing Components Connected To The Mains
Caution: Handle With Care
Caution: Heatsink/Case Temperature
Caution: Earthing Of Rack Frame
Caution: Cabinet Requirements To Meet Safety Specifications
3.3
3.3
3.3
3.3
3.4
3.4
3.4
3.4
3.2
3.2.1
3.2.2
3.2.2.1
3.2.2.2
3.2.3
3.2.4
Mechanical
Construction
Disassembly Instructions
To Gain Access To The Component Side Of The PCB
To Gain Access To The Solder Side Of The PCB
Reassembly Instructions
Screw Torques
3.5
3.5
3.5
3.5
3.5
3.6
3.6
3.3
3.3.1
3.3.2
3.3.3
Component Replacement
Critical Components
To Replace The Power MOSFET Transistors (Q1 & Q2)
To Replace The Output Rectifier (D43)
3.7
3.7
3.7
3.8
3.4
Technical Instructions
3.9
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