Sheets - Philips S42SD-YD09 Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Main function of Each Assembly
9.2 Abbreviation List
9.3 IC Data Sheets
9.1 Main function of Each Assembly
9.1.1 X Main Board
The X Main board generates a drive signal by switching the
FET in synchronization with logic main board timing, and
supplies the X electrode of the panel with the drive signal
through the connector.
1. Maintain voltage waveforms (including ERC).
2. Generate X rising ramp signal.
3. Maintain Ve bias between Scan intervals.
9.1.2 Y Main Board
The Y Main board generates a drive signal by switching the
FET in synchronization with the logic Main Board timing and
sequential supplies the Y electrode of the panel with the drive
signal through the scan driver IC on the Y-buffer board. This
board connected to the panel's Y terminal has the following
main functions.
1. Maintain voltage waveforms (including ERC).
2. Generate Y-rising Falling Ramp.
3. Maintain V scan bias.
9.1.3 Logic Main Board
The Logic Main board generates and outputs the address drive
output signal and the X,Y drive signal by processing the video
signals. This Board buffers the address drive output signal and
feeds it to the address drive IC (COF module, video signal- X Y
drive signal generation, frame memory circuit / address data
rearrangement).
9.1.4 Logic Buffer (E, F)
The Logic Buffer transmits data signal and control signal.
9.1.5 Y Buffer Board (Upper, Lower)
The Y Buffer board consisting of the upper and lower boards
supplies the Y-terminal with scan waveforms. The board
comprises eight scan driver ICs (ST microelectronics STV
7617: 64 or 65 output pins), but four ICs for the SD class.
9.1.6 AC Noise Filter
The AC Noise filter has function for removing noise (low
frequency) and blocking surge. It affects safety standards
(EMC, EMI).
9.1.7 TCP (Tape Carrier Package)
The TCP applies the Va pulse to the address electrode and
constitutes address discharge by the potential difference
between the Va pulse and the pulse applied to the Y electrode.
The TCP comprise four data driver ICs (STV7610A: 96 pins
output pins). Seven TCPs are required for signal scan.
SDI PDP 2K6
9.2 Abbreviation List
AC
COF
DC
ERC
ESD
FET
FFC
FPC
FTV
HD
I/O
IC
LB
LED
LVDS
PCB
PDP
PSU
PWB
RGB
SD
SDI
SMPS
SSB
SF
TCP
VR
Vsc
YBL
YBU
YM
9.3 IC Data Sheets
Not applicable.
9. EN 79
Alternating Current
Circuit On Foil
Direct Current
Energy Recovery Circuit
Electro Static Discharge
Field Effect Transistor
Flat Foil Cable
Flexible Printed Circuit
Flat TeleVision
High Definition
Input/Output
Integrated Circuit
Logic Buffer
Light Emitting Diode
Low Voltage Differential Signalling
Printed Circuit Board (same as PWB)
Plasma Display Panel
Power Supply Unit
Printed Wiring Board (same as PCB)
Red, Green, Blue colour space
Standard Definition
Samsung Display Industry (supplier)
Switched Mode Power Supply
Small Signal Board
Sub Field
Tape Carrier Package
Variable Resistor
Scan Voltage
Y Buffer Lower board
Y Buffer Upper board
Y Main board