Sharp LC-30HV4E User Manual

58
LC-30HV4E
No image (6)
No image when TV signal is received
Check the PC I/F unit.
No teletext screen appears.
Is the video signal on tuner image output
pin (23)?
Check peripherals of the tuner (TU1101)
and replace if necessary.
Is the video signal on pin (5) of IC1106
(level adj.) or TP1101?
Is the video signal applied to pin (63) of
IC1301 (AV switch)?
Is the level control signal sent from pin (1)
of IC1108 to pin (8) of IC1103 (AV switch)?
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES YES
Check lines and devices between pin (5) of
IC1106 and pin (63) of IC1301.
Are the MAIN video signal and SUB video
signal sent from pin (30) of IC1301 and pin
(44) of IC1301 respectively?
Check IC1301 (AV switch) and its
peripheral circuits.
Is the teletext signal received (is a teletext-supporting receiver connected to the video input
terminal) and TELETEXT selected on the remote controller?
Select TELETEXT in an appropriate manner.
Is the video signal applied to pin (21) of
IC1601 (TELETEXT CPU)?
Check lines and devices between pin (56) of
IC1301 (AV switch) and pin (21) of IC1601.
(Q1612, Q1606, Q1607, Q1608 and IC1604)
Is the text signal sent from pins (57), (58)
and (59) of IC1601?
Check IC1601 and its peripheral circuits.
Is the text signal applied to pins (57), (53)
and (55) of IC1401 (AV switch)?
Check lines and devices between pins (57), (58),
(59) of IC1601 and pins (57), (53), (55) of IC1301.
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES
Is the video signal applied to pin (7) of IC401 (MAIN COMB FILTER) and pin (7) of IC402 (SUB COMB FILTER)?
<MAIN system>
Are the MAIN-Y/C signals applied to pin
(1) (TP812) and pin (48) of IC801 (MAIN
VIDEO CHROMA) respectively?
Check lines and devices between IC4001
and IC801.
(IC403, Q415, etc.)
Are the MAIN-Y/Cb/Cr signals sent from pins
(21), (22) and (23) of IC801 respectively?
Check IC801 (MAIN VIDEO CHROMA)
and its peripheral circuits.
Are the 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.)
Are the MAIN-R/G/B signals sent from pins
(35), (37) and (39) of IC803 respectively?
Check IC803 (RGB DECODER) and its
peripheral circuits.
Are the MAIN-R/G/B signals sent from 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?
Check FL810 (6.7/30 MHz L.P.F.) and its
peripheral circuits.
Are the 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.(Q801-3 etc.)
Check lines and devices between IC1301
and IC401/402.
NO
NO
Check lines and devices between IC402
and IC802. (IC404, Q416-8, etc.)
Are the SUB-Y/C signals applied to pin (1)
(TP813) and pin (48) (TP407) of IC802
(SUB VIDEO CHROMA) respectively?
Are the SUB-Y/Cb/Cr signals sent from pins
(21), (22)and (23) of IC802 respectively?
Check IC802 (SUB VIDEO CHROMA) and
its peripheral circuits.
YES
NO
Are the
SUB-Y/Cb/Cr
signals applied to Q901-2,
Q903-4 and Q905-6 (6.7 MHz L.P.F.) respectively?
Check lines and devices between IC802 and
Q901-2/Q903-4/Q905-6 (6.7 MHz L.P.F.).
YES
NO
Are the SUB-R/G/B signals sent from Q901-2,
Q903-4 and Q905-6 (6.7 MHz L.P.F.) respectively?
YES
Check the PC I/F unit.
Check Q901-2, Q903-4 and Q905-6 (6.7
MHz L.P.F.) and their peripheral circuits.
<SUB system>
•AVC System

Sharp LC-30HV4E Specifications

General

Brand	Sharp
Model	LC-30HV4E
Category	LCD TV
Language	English