Philips 20PT643F Service Manual page 55

Alignments
Index of this chapter:
1. General Alignment Conditions
2. Hardware Alignments
3. Software Alignments and Settings
Note: The Service Default Alignment Mode (SDAM) is described in the "Service Modes,
Error Codes and Fault Finding" section. SDAM menu navigation is performed by using
the MENU UP, MENU DOWN, MENU LEFT, and MENU RIGHT keys of the remote
control transmitter.
General Alignment Conditions
Perform all electrical adjustments under the following conditions:
AC voltage and frequency: 110 V (± 10 %), 60 Hz (± 5 %).
Connect the television set to the AC power via an isolation transformer.
Allow the television set to warm up for approximately 20 minutes.
Measure the voltages and waveforms in relation to chassis ground (with the
exception of the voltages on the primary side of the power supply). Never use
heatsinks as ground.
Test probe: Ri > 10 MOhm; Ci < 2.5 pF.
Use an isolated trimmer/screwdriver to perform the alignments.