Hitachi P50H401/DW3-U Service Manual page 127

TROUBLESHOOTING THE 50AE1 PANEL
3.3 Function
3.3.1 Logic board Function
1) Data Processor
2) Data Converter
3)Scan Controller
4) Waveform ROM
5) MPU
6）EEPROM
Function of X-SUS Board
1) DC/DC power supply block
2) X switching block
3）Current detector block
4) Voltage detector block
FUNCTION OF Y-SUS BOARD
1) DC/DC power supply block
2) Y switching block
- γ adjustment(1 / 2.2 / 2.4 / 2.6 / 2.8)
- NTSC/EBU format(Color matrix) Switch
- RGB gain Control(White balance adjustment, Amplitude limitation)
- Error Diffusion Technology(Grayscale adjustment)
- Dither(Grayscale adjustment)
- Burn-in Pattern generation
- Streaking adjustment
- Quasi out-line adjustment (luminous pattern control)
- Address driver control signal generator (ADM)
- scan driver control signal generator (SDM)
- X / Y sustain control signal generator
- Waveform Pattern for drive / Timing memory
- Synchronous detection
- System control
- Driving voltage(Va, Vs, Vw) minor adjustment
- Abnormal watch (breakdown detection)/abnormal processing
- Is(sustain) current control (sustain pulse control)
- Ia(address) current control (sub-field control / sustain pulse control)
- External communication control
- Flash memory (firmware)
- Control parameter memory
- The accumulation energizing time (Every hour).
- Abnormal status memory (16 careers)
- Va (+63V) -> Vx(-30V) / Vq (-55V)
- Vcc (+5V) -> Vex (+17V) / XFve (+18V, floating)
- Switch circuit for sustain period
- Switch circuit for address period
- Switch circuit for reset period
- Isx (sustain) current detection
- Ia (address) current detection
- Vs (sustain) voltage detection
- Va (address) voltage detection
- Vcc (+5V) -> Ve (+17V) / YFve (+18V, floating)
- Vs (+85V) -> Vw (200V)
- Switching for sustain period
- Switching for address period
- Switching for reset period
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