Sharp PZ-43MR2E, Руководство по обслуживанию

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45
PZ-43MR2E
PZ-50MR2E
TROUBLE SHOOTING TABLE
(Continued)
No Picture (1)
YES
NO
YES
No e
xter
nal input <SCAR
T1 A
V
>
Chec
k the line betw
een
pin (20) of SCAR
T1 and
pin (3) of IC1301.
YES YES
No e
xter
nal input <SCAR
T2 A
V
>
Chec
k the line betw
een
pin (20) of SCAR
T2 and
pin (10) of IC1301.
YES
NO
YES
No e
xter
nal input <SCAR
T3 A
V
>
NO
Chec
k IC1301 and its
per
ipher
al circuits
.
Is there A
V
signal input
at pin (17) of IC1301 (A
V
SWITCH)?
Is there A
V
signal input
at pin (10) of IC1301 (A
V
SWITCH)?
Is there A
V
signal input
at pin (3) of IC1301 (A
V
SWITCH)?
YES
Are there MAIN-R/G/B signal inputs at pins (5), (7) and (9) of IC811 (30MHz L.P
.F
.), respectiv
ely?
YES
NO
Chec
k IC811 and
its per
ipher
al
circuits
.
YES
YES
YES
NO
Chec
k IC810 and
its per
ipher
al
circuits
.
Are there SUB-R/G/B signal outputs at pins (13), (11) and (10) of IC810, respectiv
ely? (in STD mode)
Are there SUB-R/G/B signal outputs at pins (13), (11) and (10) of IC811, respectiv
ely? (in HDTV mode)
Chec
k the line betw
een
pin (20) of SCAR
T3 and
pin (17) of IC1301.
YES
NO
Chec
k the line betw
een
IC405 and IC801.
YES
Are there MAIN-Y signal inputs at pins (1) and (44) of IC801 (MAIN
VIDEO CHR
OMA) as w
ell as MAIN-C signal inputs at pins
(43) and (48)(composite signal at pin (1) in SECAM system)?
NO
Chec
k the line betw
een
IC402 and IC802.
Are there SUB-Y signal input at pin (44) of IC802 (SUB VIDEO CHR
OMA) (at pin (1) in NTSC system) as w
ell as
SUB-C signal input at pin (43) (at pin (48) in NTSC system)?
YES
NO
Chec
k IC801 and its
per
ipher
al circuits
.
YES
Are there MAIN-Y/Cb/Cr signal outputs at pins (21), (22) and (23) of IC801, respectiv
ely?
NO
Chec
k IC802 and its
per
ipher
al circuits
.
Are there SUB-Y/Cb/Cr signal outputs at pins (21), (22) and (23) of IC802, respectiv
ely?
YES
NO
Chec
k the line betw
een
IC801 and IC803.
YES
Are there MAIN-Y/Cb/Cr signal inputs at pins (69), (68) and (67) of IC803 (RGB DECODER), respectiv
ely?
NO
Chec
k the line betw
een
IC802 and IC804.
Are there
SUB-Y/Cb/Cr
signal inputs at pins (5), (9)
and (7) of IC804 (6.7MHz L.P
.F
.), respectiv
ely?
YES
NO
Chec
k IC803 and its
per
ipher
al circuits
.
YES YES
Are there MAIN-R/G/B signal outputs at pins (35), (37) and (39) of IC803, respectiv
ely?
NO
Chec
k IC804 and its
per
ipher
al circuits
.
Are there SUB-R/G/B signal outputs at pins (13), (11) and (10) of IC804, respectiv
ely?
NO
NO NO
Select INPUT1 A
V
on
the men
u screen.
Select INPUT2 A
V
on
the men
u screen.
NO
Is INPUT3 A
V
selected
on the Input Select men
u screen?
Is INPUT2 A
V
selected
on the Input Select men
u screen?
Is INPUT1 A
V
selected
on the Input Select men
u
screen?
Select INPUT3 A
V
on
the men
u screen.
Are there MAIN and SUB video signal outputs at pins (56) and (44) of IC1301, respectiv
ely?
YES
NO
Chec
k
the lines betw
e
en
IC1301, IC405 and IC402.
Are there video signal inputs at pins (1) and (2) of IC405 (MAIN COMB FIL
TER) and IC402 (SUB COMB FIL
TER)?
Chec
k the PC I/F unit.
<MAIN system>
<SUB system>
<HDTV mode>
<STD mode>
Are there MAIN-R/G/B signal inputs at pins (5), (7) and (9) of IC810 (6.7MHz L.P
.F
.), respectiv
ely?
C
A
D
F
B E