TCL 32D2930, Service Manual

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Factory Test & Alignment Specification For MT56-AP Series (V1.0)
11
4. Test & Alignment
According to the requirement of order, we suggest take the below steps to finish the appropriate settings.
Note:

All tests and measurements mentioned hereafter have to be carried out at a normal mains voltage
( 100 ~ 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 Picture Performance assessment such as White Balance (luminance and colour temperature)
has to be performed into subdued lighted room after at least 60min of warm-up in order to avoid any
temperature drift influence (colorimetry vs time).
4.1 Pre-Conditions and Power Supply Check
Before power-on, please check the board according to the relevant block diagram and circuit diagram,
make sure that no serious issue or mistake can destroy the board. For example, the output of DC/DC and
LDO should not be shorted to ground.
Supply a suited voltage and power-on, then check the voltage according to the relevant block diagram,
circuit diagram and voltage spec, the error should be less than 5%, for example, the voltage for main chip
(+3V3, +2.5V, VDDC1V15, 1V5_DDR, etc.), the voltage for TUNER (TU_3V3), the voltage for amplifier
(AMP_VCC), etc.
4.2 Project ID Modification
There are different ID stored in the
EMMC
depending on different Panels settings and Model features, but
there’s only one key branching Project ID able to ensure normal display. And when you power on the TV
set, you should make sure the Project ID is accord with the BOM description. If not, you need to modify
Position Value Test Point
P103 12V±10% 12V
LDH1 5V±5% +5V
P103 3.3V ±1% 3V3SB
UD33 3.3V ±1% 3V3
LDJ1 1.5V ±1% DDR_1V5
LDB0 1.2V±1% CORE_1V2
UD18 1.8V ±1% 1V8
UT2 3.3V ±1% TUNER_VCC
U201 3.3V ±1% 3V3_DEMO
L201 1.1V ±1% NC