Samsung PS42P2SBX/XEC, Service Manual

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Circuit Operation Description
Samsung Electronics 5-33
5-3-1(C) WAVEFORMS IN NORMAL OPERATION
If the PDP unit and the logic board is in normal operation, the operation LED of Figure 1 would blink at
about 1 second interval.
If the unit is out of order, check the status of the operation LED through eye-inspection first. If the behavior
of the operation LED is different from that of normal state, you have to replace the board. To check trouble
on the board, the following logic board test procedures described below.
❑
42°” SD s1.0 logic main board T/S
Required test equipment: : - Oscilloscope (digital 400 MHz 3 channel or more)
- Multi meter
Other equipment: : - DC power supply (5V: 1EA )
- Sub-PCB ASS'Y for JIG: 1 EA
Name
LVDS Connector
Operation LED
Key-Scan Connector
256k
Y Connector
X Connector
LE01 (Address Buffer Connector)
LE02 (Address Buffer Connector)
Power Fuse
Power Connector
No
1
2
3
4
5
6
7
8
9
10
Function
Input connector to receive encoded RGB, H, V, DATAEN, and DCLK signal.
It shows Sync and clock are properly received by the logic board.
Connector to connect key scan board to check and adjust 256K data.
EEPROM including gamma table, APC table, drive signal timing and other options
Connector to output Y drive board control signal
Connector to output X drive board control signal
Connector to output address data, and control signal to the E and F buffer boards.
Connector to output address data, and control signal to the E and F buffer boards.
Fuse connected to the power source line of the logic board.
Connector to connect the supply power (5V) with the logic board.
drive board control signal.