Voltage Chart - Philips 55PFL5755 Service Manual

4. Voltage Measurement
INFO:
All tests and measurements mentioned hereafter have to be carried out at a normal mains
voltage (220 ~ 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).
Preconditions – DC/DC Check
1.1.
Before power on, please check the board according to the relevant block diagram and
circuit diagram, and make sure that no serious error should 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 less than 5% .For example, the voltage
for main chip(DV33, AV33,DV18,DV11,etc.), the voltage for DDR (DDRV) , the voltage
for amplifier(AUDIO_PWR),etc. Only the standby voltage is necessary if there is no
software in the flash.
1.2. Panel ID check and modify
There is different ID stored in the NVM depended on different Panels. Modify it with Hyper
terminal if the initial ID or a wrong ID make the set can not display clearly. It can be
checked and modified in Factory menu->Feature->Panel ID if the set can display clearly.
The set should be restart if the panel ID is changed.
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