Test And Alignment Specification For Mt35-V0.20; Electrical Assembly Alignmen; Preconditions – Dc/Dc Check - THOMSON 22E92NH22 Service Manual

Test and Alignment Specification for MT35-V0.20

The xxE90/E92NH22 models are Europe LCD platform with DVB-T designed for driving below
panels:
•
32" LPL (LVDS)
•
26" CMO(LVDS)
•
22" AUO(DUAL LVDS)
The main chip is from Mediatec (MTK5335 series) and supports below inputs:
• one analog and digital mixed RF (PAL B/G D/K I, SECAM B/G D/K L/L',DVB-T)
• one SCART (CVBS & RGB)
• one CMP (YPrPb can support from 480i up to 1080p)
• one VGA
• two HDMI (can support 480i/p, 576i/p, 720p up to 1080i/p)
compliant v1.2. with HDCP, audio included as EIA-861B standard
• one S-Video input
• one Headphone output
• one SPDIF output
More relevant details are listed into the Spec.
INFO:
All tests and measurements mentioned hereafter have to be carried out at a normal mains
voltage (110 ~ 240 VAC)
All voltages have to be measured with respect to ground, unless otherwise stated
All final tests have to be done on a complete set including LCD panel in a room with temperature
of 25+/-7°C
The White Balance (color temperature) has to be performed into subdued lighted room after at
least 1 hour of warm-up/burn-in. This is applicable for both Alignment and Picture Performance
evaluation at OQA in order to be set free of any temperature drift (colorimetry vs time)
1. Electrical Assembly Alignment
1.1. Preconditions – DC/DC Check
Before Power On the chassis, please check and make sure that U801,U802,U805, U809, U803,
U804, U811,U201,C817(positive) outputs are not shorted to ground.
Supply 12v and 5v to P804 and test the relative voltage.
position
U811
U801
U802
U803
U804
U805
U809
value
3.3V +/-5%
3.3V +/-5%
9V +/-5%
1.2V +/-5%
2.5V +/-5%
5V +/-5%
3.3V +/-5%