Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 126
Q528.1E LA
9.
9.3.7
S
ervice Tips
After replacing some components in the primary circuit of the
Platform Supply, a variable transformer has to be used to ramp
up the mains voltage from 0 to 30 V. This will result in the
Platform Supply to start-up. Monitor the +12 V output voltage
and increase the mains voltage until the regulation and
feedback loop are working.
Connector 1B40 can be used by Service to power the SSB
directly by an external power supply. This enables the SSB to
start-up without the use of the Display Supply. The power
consumption of the SSB is:
•
1.5 to 2.0 A for the +12 V line.
•
2.0 A for the +5 V line.
It should be noted that, by using this method, the audio
amplifier and the audio protection are not tested!
