Sharp LC-15PX1U, Service Manual

Page: 25 / 104

LC-15PX1U
25
TROUBLE SHOOTING TABLE
(Continued)
No Color
s
No TV
color
s
No VIDEO
color
s
No S-VIDEO color
s
No COMPONENT color
s
Chec
k all the settings on the microprocessor's adjust process men
u.
YES
YES YES
NO
NO
Is the input at pin (71) of IC8801 nor
mal?
Are the input at pins (4) and (6) of IC8801 nor
mal? (480i)
Is the input at pins (43) and (54) of IC8701 nor
mal? (480i, 1080i,
720p) Chec
k the CB and CR
lines of SC2001 and their per
ipher
al circuits
.
Chec
k the output at
IC8801 (480i), output at IC8701 (480i, 1080i, 720p), input/output at IC1201 and their per
ipher
al circuits
.
Is the output at pin (40) of IC3401 nor
mal?
NO
Chec
k IC3401 and its
per
ipher
al circuits
.
NO
Chec
k the output of
IC8801, input / output of IC1201 and its per
ipher
al circuits
.
Chec
k the
Video lines of
IC3401, SC2001 and their per
ipher
al circuits
.
YES
NO
Is the input at pin (71) of IC8801 nor
mal?
Chec
k betw
een SC
input of J3401 and pin (71) of IC 8801.
Chec
k the output of
IC8801 input / output of IC1201 and its per
ipher
al circuits
.