Circuit Description - Sony RM-PJ25 Service Manual

1-6. Circuit Description

QA board
The overall input connectors, SCAN CONV. and sub CPU are mounted.
The built-in CPU of SCAN CONV. controls the whole system.
And the QA board also controls the fan.
SCAN CONV. performs the signal-processing function such as HDMI receiving, A/D conversion, pixel
number conversion, sharpness, contrast, brightness, color, hue, gamma correction, I/P conversion, NR,
and 3D processing.
Also, the QA board performs the reality creation processing.
QB board
RS-232C connector is mounted.
C board
The Gamma IC and panel driver circuit are mounted.
The signal processed in the QA board is converted to the proper signal for panel in this board.
The C board performs the conversion of the input signal to the voltage for driving the panel, CSC conver-
sion, white balance correction, UF correction, and generation the timing for driving the panel. And HFR
and 3D processing circuit are mounted
GA board
This board functions as AC filter and power supply when the standby mode is set to "Low".
GB board
Main power supply block
V board
This board performs the measuring of outside air temperature and detecting whether the filter holder is closed.
TL board
This board measures the lamp temperature.
U board
This board detects whether the lamp cover for light source is closed.
BALLAST
Ballast provides the power supply for lamp.
NF board
Infrared receive block from remote control.
HA board
The control panel is mounted.
HB board
The caution LED is mounted.
EM board
The 3D transmitter is mounted.
1-24 (E)
VPL-HW40ES