Service manual

Alignments
Contents of this chapter:
• General Alignment Conditions
• Hardware Alignments
• Software Alignments and Settings
Note: The Service Default Mode (SDM) and Service Alignment Mode (SAM) are
described in chapter 5. Menu navigation is done with the “CURSOR UP, DOWN, LEFT
or RIGHT” keys of the remote control transmitter.
General Alignment Conditions
All electrical adjustments should be performed under the following conditions:
• AC voltage and frequency: 110V ( ± 10%); 60Hz (± 5%)
• Connect the set to AC power via an isolation transformer.
• Allow the set to warm up for approximately 20 minutes.
• Measure the voltages and waveforms in relation to the chassis ground (with the
exception of the voltages on the primary side of the power supply). Never use the
cooling fins/plates as ground.
• Test probe: Ri > 10M; Ci < 2.5pF.
• Use an isolated trimmer/screwdriver for the alignments.
• The following default settings are needed to start the alignment:
§ set color enhancement to NATURAL or MOVIE mode,
§ switch “off” dynamic contrast,
§ switch “off” active control,
§ set brightness to 42 and contrast (named picture) on 99,
§ external video pattern generator on system NTSC M, 61.25MHz (channel 3).