THOMSON CHASSIS MT62B, Service Manual

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Factory Alignment Specification for MT62 chassis
TestAlignmentSpecification for TCL-MT5362-V0.50.doc (Page 3 of 14)
The MT62 chassis is designed for European LCD TV. The main chip is from Mediatec (MTK5362
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 Side AV(CVBS )
•
one SCART (CVBS & RGB)
•
one SCART (CVBS & YC)
•
one CMP (YPrPb can support from 480i up to 1080p)
•
one VGA
•
three HDMI (can support 480i/p, 576i/p, 720p up to 1080i/p)
compliant v1.2. with HDCP, audio included as EIA-861B standard
•
one Headphone output
•
one SPDIF output
More relevant details are listed into the Spec..
INFO:
ª
All tests and measurements mentioned hereafter have to be carried out at a normal mains voltage
( 220 ~ 240 VAC )
ª
All voltages have to be measured with respect to ground, unless otherwise stated
ª
All final tests have to be done on a complete set including LCD panel in a room with temperature of
25+/-7°C
ª
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 U811,U9,U31, U7, U6, U11,
U5,U4,U34,C74(positive) , C62(positive) , C76(positive) , C152(positive) , C89(positive) ,
C82(positive) outputs are not shorted to ground.
Supply voltage to P19 and test the relative voltage.
Supply P19 : Pin5,6,8=12v (24v work with IPB PSU);Pin11,12=5v;Pin1,2=Voltage for sound
Amplifier IC (18V for 46/52 inch;12V for other inch )
Test the relative voltage:
position value note
C152(positive) 24V +/-5%
C89(positive) 12V +/-5%
These are necessary
only work with IPB PSU
C82(positive) 12V +/-5%
U811 3.3V +/-5%
C74(positive) 5.0V +/-5%
U9 3.3V +/-5%
U31 3.3V +/-5%
U7 1.2V +/-5%
U6 2.5V +/-5%
U5 9.0V +/-5%
U4 5.0V +/-5%
C62(positive) 1.8V +/-5%