Model 187 & 189
Users Manual
6
7
Maintenance ................................................................................................................. 6-1
Introduction .................................................................................................................... 6-1
General Maintenance..................................................................................................... 6-1
Testing the Fuses........................................................................................................... 6-1
Replacing the Batteries .................................................................................................. 6-3
Replacing the Fuses ...................................................................................................... 6-5
User-Replaceable Parts ................................................................................................. 6-5
In Case of Difficulty ........................................................................................................ 6-5
Specifications............................................................................................................... 7-1
Safety and Compliances ................................................................................................ 7-1
Physical Specifications................................................................................................... 7-2
Feature Summary........................................................................................................... 7-3
Basic Specifications ....................................................................................................... 7-4
Input Characteristics....................................................................................................... 7-12
iv