Hitachi C11XMB Service Manual page 14

Picture is not displayed only
when the RGB signal is input
Check at operating mode
Are
voltage input
at pins(1)(4)(6)(8) of NO
E800 on the PWB
assembly
MAIN?
(1):+17V
(4):+15V
YES
(6):+6.6V
(8):+4.1V
Make
sure the
NG
connection between PWB
assembly MAIN and
INPUT.
OK
Is the image
NO
from RGB output port
displayed correctly?
YES
LCD/LENS PRISM
PWB assembly MAIN
CP-X444(C11XMB)/CP-X440(C11XM25)
Power unit
(circuit)
Connect firmly
PWB assembly
assembly INPUT
Does the
message "No input
is detected" appear? or is
the image displayed with
incorrect timing?
NO
Does a image
displayed with proper timing
have a trouble with a certain
color R, G, and/or B?
NO
PWB assembly INPUT
14
YES
IS03
SN74F157
YES
IS01, IS02
EL8302IU