Sharp PZ-43MR2U, Руководство по обслуживанию, Страница: 52 / 146

52
PZ-MR2T
PZ-43MR2U
PZ-50MR2U
TROUBLE SHOOTING TABLE
(Continued)
No picture (2)
YES
NO
YES
NO
YES
No e
xter
nal input picture (INPUT3 RGB)
Is "RGB" of "INPUT3" selected on Input Select men
u screen?
Select "RGB" of "INPUT3" on men
u
selection screen.
Is RGB signal input a
v
ailab
le at pins (15), (17)
and (19) of IC1401 (A
V
SWITCH)?
Chec
k the circuit betw
een
pins (1)/(2)/(3) of SC1103 and pins (15)/(17)/(19) of IC1401.
Is COMPONET/RGB signal output a
v
ailab
le at pins (38),
(36) and (34) on IC1401?
Chec
k IC1401 and its
per
ipher
al circuits
.
Is COMPONET/RGB signal input a
v
ailab
le at pins (6), (5)
and (4) of IC803 (RGB DECODER), respectiv
ely?
Chec
k the circuit betw
een
pins (38)/(36)/(34) of IC1401 and pins (6)/(5)/(4) of IC803.
YES YES
NO
YES
NO
YES
Are there MAIN-R/G/B signal inputs at pins (5), (7) and (9) of IC811 (30MHz L.P
.F
.),
respectiv
ely?
Chec
k IC811 and
its per
ipher
al
circuits
.
Chec
k the line
betw
een IC803
and IC811.
Are there MAIN-R/G/B signal outputs at pins (13), (11) and (10) of IC811, respectiv
ely?
<MAIN>
<SUB>
<HDTV>
Chec
k the PC I/F unit.
NO
YES
NO
No e
xter
nal input picture (INPUT1 COMPONENT)
Is "COMPONENT" of "INPUT1" selected on Input Select men
u screen?
Select "COMPONENT" of "INPUT1" on men
u
selection screen.
Is COMPONENT signal input a
v
ailab
le at pins (59),
(61) and (63) on IC1401 (A
V
SWITCH)?
Chec
k the circuit betw
een
pins (26)/(17) and (8) of JC1103 and pins (59)/(61)/ (63) of IC1401.
NO
YES
NO
NO
YES
NO
No e
xter
nal input picture (INPUT3 COMPONENT)
Is "COMPONENT"of "INPUT3" selected on Input Select men
u screen?
Select "COMPONENT"of "INPUT3" on men
u
selection screen.
Is component signal input a
v
ailab
le at pins (5), (7) and
(9) of IC1401 (A
V
SWITCH)?
Chec
k the circuit betw
een
pins (26)/(17)/(8) of J1104 and pins (5)/(7)/(9) of IC1401.
E
YES
NO
YES
Is COMPONENT signal output a
v
ailab
le at pins (44),
(42) and (40) of IC1401?
Chec
k IC1401 and its
per
ipher
al circuits
.
NO
Is component signal input a
vailab
le at pins (19), (18) and
(17) of IC802 (SUB
VIDEO
CHR
OMA), respectiv
ely?
Chec
k the circuit betw
een
pins (44)/(42)/(40) of IC1401 and pins (19)/(18)/(17) of IC803.
NO
YES
NO
D
YES
NO
YES
Is COMPONENT signal output a
v
ailab
le at pins (50),
(48) and (46) on IC1401?
Chec
k IC1401 and its
per
ipher
al circuits
.
NO
Is COMPONENT signal input a
vailab
le at pins (19), (18) and
(17) of IC801 (MAIN
VIDEO
CHR
OMA), respectiv
ely ?
Chec
k the circuit betw
een
pins (50)/(48)/(46) of IC1401 and (19)/(18)/(17) of IC801.