| || |
NOTE: This unit is obsolete. Most accessories and modifications mentioned on this page are no longer available.
Nokia ACU5152 Antenna Control Unit (Positioner)
Two capacitors in the PSU should be replaced every year for reliability. CP23 = 10uF/50v. CP07 = 22uF/50v.
If these capacitors fail, the Power Supply output voltages will increase. Normally DP11 = 40 volts, DP12 = 20 volts.
If capacitors fail, voltages can go as high as 80 volts!
Replace them before it happens!
If the voltages go high, IA7805 (7805 regulator for 5 volts) and IA04 (L6203 motor control I.C.) can fail. You might see the LED flickering or you might smell smoke!
A complete fault-finding guide called "The Satellite Repair Manual V" is available.
This information is given in good faith, based on several years of workshop experience involving thousands of repairs. No responsibility will be accepted for any death, damage or injury caused either directly or indirectly by the use of this information. The reader should check the facts himself. It is assumed and stressed that the reader will be familiar with good, safe, electronic workshop practice and will be familiar with all tools, components and terms used. If there is any doubt about the reader's ability to carry out such work competently and safely, the work should be referred to a specialist engineer.
Version 1.0 updated on February 10, 2000