Read Sharp LC-30HV4E (serv.man10) Service Manual online
58
LC-30HV4E
TROUBLE SHOOTING TABLE
(Continued)
(AVC System)
NO
YES
Is HD1/VD1 outputted to pins
(9) and (4) of IC801,
respectiv
ely?
Chec
k IC801 and its per
ipher
al
circuits
.
NO
YES
Is HD2/VD2 outputted
to pins (9) and (4) of
IC802, respectiv
ely?
Chec
k IC802 and its
per
ipher
al circuits
.
NO
YES
Is HD1/VD1 outputted to pins
(44) and (2) of IC1901,
respectiv
ely?
Chec
k the circuit betw
een pins
(9)/(4) of IC801 and pins
(44)/(2) of IC1901.
NO
YES
Is HD2/VD2 inputted to
pins (19) and (20) of
IC1901, respectiv
ely?
Chec
k the circuit
betw
een pins (9)/(4) of
IC1901 and pins
NO
YES
Chec
k IC1901 and its
per
ipher
al circuits
.
NO
YES
Is HDS/VDS inputted to
pins (21) and (22) of
IC1901, respectiv
ely?
Chec
k IC1901 and its
per
ipher
al circuits
.
NO
YES
Is HD3/VD3 inputted to pins
(14) and (13) of IC604,
respectiv
ely?
Chec
k the circuit betw
een pins
(8)/(10) of IC1901 and pins
(14)/(13) of IC604.
NO
YES
Is SP-HD/SP-VD/SP-CP
outputted to pins (16) , (28) and
(15) of IC604, respectiv
ely?
Chec
k IC604 and its per
ipher
al
circuits
.
NO
YES
Is SP-HD/SP-VD/SP-CP
inputted to pins (40) , (5) and
(6) of IC1901, respectiv
ely?
Chec
k the circuit betw
een pins
(16)/(28)/(15) of IC604 and pins
(40)/(5)/(6) of IC1901.
NO
YES
Is PL-HD/PL-VD/PL-CP/PL-HBLK
outputted to pins (34) , (35), (33)
and (31) of IC1901, respectiv
ely?
Chec
k IC1901 and its
per
ipher
al circuits
.
NO
YES
Is Hsync/Vsync/SCP inputted
to pins (1) , (2) and (31) of
IC803, respectiv
ely?
Chec
k the circuit betw
een pins
(34)/(35)/(33)/(31) of IC1901
and pins (1)/(2)/(31) of IC803.
NO
YES
Is HS/VS outputted to pins
(29) and (28) of IC803,
respectiv
ely?
Chec
k IC803 and its per
ipher
al
circuits
.
Chec
k PC I/F Unit.
Is HD3/VD3 outputted to pins
(8) and (10) of IC1901,
respectiv
ely?
NO
YES
Is HD_50/VD_50 outputted to
pins (79) and (80) of IC803,
respectiv
ely?
Chec
k IC803 and its per
ipher
al
circuits
.
NO
YES
Is HD_50/VD_50 inputted to
pins (3) and (4) of IC803,
respectiv
ely?
Chec
k the circuit betw
een pins
(79)/(80) of IC803 and pins
(3)/(4) of IC604.
NO
YES
YES
Chec
k IC604 and its
per
ipher
al circuits
.
NO
Is SP-HD/SP-VD outputted to
pins (40) and (5) of IC1901,
respectiv
ely?
Chec
k the circuit betw
een pins
(16)/(28) of IC604 and pins
(40)/(5) of IC1901.
Is SP-HD/SP-VD outputted to
pins (16) and (28) of IC604,
respectiv
ely?
<MAIN system;
15k>
<MAIN system;
1080i/625P>
<SUB system>
<MAIN system;
D2/D3/D4>
Sync
hr
onization failure
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