Sharp LC-30HV4U User Manual

62
LC-30HV4U
LC-30HV4D
•AVC System
No image (2)
No VIDEO image on INPUT4
Has "INPUT4" been selected on the Input
Select screen?
No VIDEO image on INPUT3
Has "INPUT3" been selected on the Input Select
screen?
Is video signal applied to pin (15) (COMPOSITE
VIDEO SIGNAL INPUT)?
Are Y and C signals applied to pins 17 and 19
(S VIDEO SIGNAL INPUT) respectively?
Are video signals applied to input terminal of
IC1301 (AV SW)?
Check lines and devices between pin (23) of
J1104 (INPUT3) and pin (15) of IC1301.
Check lines and devices between pins (9)/(10) of
SC1102 (INPUT3) and pins (17)/(19) of IC1301.
Select "AV-Y/C" of "INPUT3" on the Input Select
screen.
NO
Select "INPUT4" on the Input Select screen.
NO
Check IC1301 (AV SW) and its peripheral
circuits.
NO
Check lines and devices between IC1301 and
IC7001/IC402/IC801/IC802.
NO
NO
NO
YES
YES
YES
Is video signal applied to pin (22) (COMPOSITE
VIDEO SIGNAL INPUT)?
Are Y and C signals applied to pins (24) and (26)
(S VIDEO SIGNAL INPUT) respectively?
Are video signals applied to input terminal of
IC1301 (AV SW)?
Check lines and devices between pin (3) of
J2404 (INPUT4) and pin (22) of IC1301.
Check lines and devices between pins (3)/(4) of
J2401 (INPUT4) and pins (24)/(26) of IC1301.
NO
NO
YES
YES
YES
YES
<When video signal is received> Are MAIN-Y/C
signals applied to pins (1) (TP812) and (48) of
IC801 respectively?
<When Y/C signal is received> Are MAIN-Y/C
signals applied to pins (44) and (43) of IC801
(MAIN VIDEO CHROMA) respectively?
<When video signal is received> Check lines
and devices between IC7001 and IC801.
(IC7003, Q7005, etc.)
<When Y/C signal is received> Check lines and
devices between IC1301 and IC801. (Q827,
Q403, Q404, etc.)
<When video signal is received> Are MAIN-/SUB- VIDEO SIGNALS sent from pins (56) and (44) of IC1301 respectively?
<When Y/C signal is received> Are MAIN-Y/MAIN-C/SUB-Y/SUB-C signals sent from pins (56), (58), (44) and (47) of IC1301 respecti
vely?
<When video signal is received> Are video signals applied to pins (93) of IC7001 (MAN COMB FILTER) and pin (7) of IC402 (SUB CO
MB FILTER)?
<When Y/C signal is received> Are MAIN signals applied to pins (44)/(43) of IC701 (MAIN VIDEO CHROMA) and SUB signal applied to
pins (5)/(7) of IC802 (SUB VIDEO CHROMA) respectively?
Are MAIN-Y/Cb/Cr signals sent from pins (21),
(22) and (23) of IC801 respectively?
Check IC801 (MAIN VIDEO CHROMA) and its
peripheral circuits.
NO
NO
NO
YES YES
YES YES
YES YES
YES YES
YES YES
YES
YES
YES
Are MAIN-R/G/B signals sent from pins (35),
(37) and (39) of IC803 respectively?
Check IC803 (RGB DECODER) and its
peripheral circuits.
NO
Are MAIN-R/G/B signals applied to pins (19),
(15) and (12) of FL810 respectively?
Is cutoff frequency setting pin (17) of FL810
(6.7/30 MHZ L.P.F.) pulled high?
NO
Check the PC I/F unit.
Check FL810 (6.7/30 MHz L.P.F.) and its
peripheral circuits.
Are MAIN-Y/Cb/Cr signals applied to pins (69),
(68) and (67) of IC803 (RGB DECODER)
respectively?
Check lines and devices between IC801 and
IC803. (IC814, Q814, Q815, etc.)
NO
Are MAIN-R/G/B signals applied to pins (3), (7)
and (10) of FL810 (6.7/30 MHz L.P.F.)
respectively?
Check lines and devices between IC803 and
FL810. (Q801-803, etc.)
NO
MAIN system
<When video signal is received> Are SUB-Y/C signals
applied to pin (1) (TP813) and pin (48) (TP407 ) of
IC802 (SUB VIDEO CHROMA) respectively?
<When Y/C signal is received> Are SUB-Y/C
signals applied to pins (5) and (7) of IC802
(SUB VIDEO CHROMA) respectively?
<When video signal is received> Check lines
and devices between IC402 and IC802. (IC404,
Q416-418, etc.)
<When Y/C signal is received> Check lines and
devices between IC1301 and IC802. (Q828,
Q409, Q410, etc.)
Are SUB-Y/Cb/Cr signals sent from pins (21),
(22) and (23) of IC802 respectively?
Check IC802 (SUB VIDEO CHROMA) and its
peripheral circuits.
NO
NO
NO
Are SUB-Y/Cb/Cr signals sent from Q901-902,
Q903-904 and Q905-906 (6.7 MHz L.P.F.)
Check Q901-902, Q903-904 and Q905-906 (6.7
MHz L.P.F.) and their peripheral circuits.
NO
Are SUB-Y/Cb/Cr signals applied to Q901-902,
Q903-904 and Q905-906 (6.7 MHz L.P.F.)
respectively?
Check lines and devices between IC802 and
Q901-902/Q903-904/Q905-906 (6.7 MHz L.P.F.).
NO
Check the PC I/F unit.
SUB system
(C)
(A), (C)
(D)
(B), (D)

Sharp LC-30HV4U Specifications

General

Brand	Sharp
Model	LC-30HV4U
Category	LCD TV
Language	English