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EN 30
9.
FHP PDP
9. Circuit Descriptions and Abbreviation List
9.1
Board Function Description
9.1.1
Logic Board Function
Data Processor
•
Gamma adjustment (1 / 2.2 / 2.4 / 2.6 / 2.8).
•
NTSC/EBU format (Colour matrix) Switch.
•
RGB gain Control (White balance adjustment, amplitude
limitation).
•
Error diffusion technology (grey scale adjustment).
•
Dither (grey scale adjustment).
•
Burn-in pattern generation.
Data Converter
•
Quasi out-line adjustment (luminous pattern control).
Scan Controller
•
Address driver control signal generator (ADM).
•
Scan driver control signal generator (SDM).
•
X/Y sustain control signal generator.
Waveform ROM
•
Waveform pattern for drive / timing memory.
MPU
•
Synchronous detection.
•
System control.
•
Driving voltage (Va, Vs, Vr, Vw) adjustment.
•
Abnormal watch (breakdown detection) / abnormal
processing.
•
I_s (sustain) current control (sustain pulse control).
•
I_a (address) current control (sub-field control).
•
External communication control.
•
Flash memory (firmware).
EEPROM
•
Control parameter memory.
•
Counts operating time (number of hours).
•
Abnormal status memory (16 places).
9.1.2
Function of X-SUS Board
DC/DC power supply block
•
Vcc (+5V) -> Ve (+17V) / XFve (+18V, floating).
X Switching Block
•
Switching during address period.
•
Switching during sustain period.
•
Switching during reset period.
Current Detector Block
•
I_sx (sustain) current detection.
•
I_ax (address) current detection.
Circuit Descriptions and Abbreviation List
9.1.3
9.1.4
9.1.5
9.1.6
Function of Y-SUS Board
DC/DC Power Supply Block
•
Vcc (+5V) -> Ve (+17V) / YFve (+ 18V, floating)
•
Vs (+85V) -> Vw (+185V)
Switching Block
•
Switching during address period.
•
Switching during sustain period.
•
Switching during reset period.
Current Detector Block
•
I_sy (sustain) current detection.
•
I_sp (SDM) current detection.
Function of ADM Board
Address Driver Module
•
Supplies voltage Va to the glass plate.
Function of SDM Board
Scan Driver Module
•
Supplies voltage Vs to the glass plate.
Function of PSU Board
Stand-by Power Supply Block
•
AC100-240: +5V & +3V3 Stand-by.
PFC Block (AD/DC Power Supply Block)
•
AC100-240: +390V.
AD/DC Power Supply Block
•
+380V, Vcc (+5V), Vs (+80V), Va (+60V).
Current Detection Block
•
l_a (address) current detection.
Abnormal Voltage Monitoring
•
Vs excess voltage monitoring.
•
Va excess voltage monitoring.
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