LC-15L1E (serv.man8). (8) Troubleshooting table - Sharp TV Service Manual (repair manual)

lc-15l1e (serv.man8) service manual
Model
LC-15L1E (serv.man8)
Pages
11
Size
51.77 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / (8) Troubleshooting table
File
lc-15l1e-sm8.pdf
Date

Read Sharp LC-15L1E (serv.man8) Service Manual online

18
LC-15L1E
TROUBLE SHOOTING TABLE
No picture and no sound at all
(When using A
C
 adapter)
Chec
k that micr
ocomputer adjustment pr
ocess men
u
 is set correctl
y
.
No fluorescent lamp lighting
Is F3801 normal?
Replace F3801.
Is F3804 normal?
Replace F3804.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Is loaded-side shor
t-circuited 
when F3801 is remo
v
ed?
Are T3701 
secondar
outputs +34V
, +9V
, +5V and 
-11V nor
mal?
Is oscillation w
a
v
e
fo
rm
 
nor
mal at 
T3701 pr
imar
y?
Chec
k T3701 
secondar
loading.
Chec
k J9901 per
ipher
y and 
connector cab
le
.
Chec
k S4050 and connector 
cab
le
.
Is pin (120) of IC1201 at "H" 
le
v
el?
Replace and chec
fluorescent lamp
.
Is oscillation w
a
v
e
fo
rm
 
nor
mal at pr
imar
y of 
T6501, 
T6502, 
T6503 and 
T6504?
Chec
k Q6501, Q6502, 
Q6503, Q6504, Q6511, 
Q6512, Q6513, Q6514, 
T6501, T6502, T6503, T6504 
and their per
ipher
ies
.
Chec
k rele
v
ant line
, IC1201 
and per
ipher
y.
Are Q3807 and Q3803 
nor
mal?
Are 
T3701 pr
imar
y per
ipher
y,
 
Q3703, Q3705 and S4050 
shor
t-circuited?
19
LC-15L1E
TROUBLE SHOOTING TABLE
 (Continued)
No picture and no sound at all
(When using batter
y)
Chec
k that micr
ocomputer adjustment pr
ocess men
u is set correctl
y
.
Is F9001 nor
mal?
Replace F9001.
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
No po
wer (Normal operation with A
C
 adapter)
Is batter
y v
oltage (1.8-2.2V) present at pin (94) of IC2001?
Is temper
ature detection v
oltage (0.5-1.8V) present at pin (93) of IC2001?
Is batter
y detection of pin (68) of IC2001 at "L" le
v
el?
Are pins (2) and (4) of Q3806 at "L" le
v
el?
Chec
k IC2011, F9001, batter
y and their per
ipher
ies
.
Chec
k IC2011, batter
y and their per
ipher
ies
.
Chec
k IC2011, batter
y and their per
ipher
ies
.
Chec
k Q3801, Q3802 and their per
ipher
ies
.
Chec
k Q3806.
No operation with batter
y
Is loaded side shor
t-
circuited when F9001  is remo
v
ed?
Are T3701 
secondar
outputs +34V
, +9V
+5V and -11V nor
mal?
Is oscillation w
a
v
e
fo
rm
 
nor
mal at 
T3701 
pr
imar
y?
Chec
k T3701 
secondar
y loading.
Chec
k P9004 
per
ipher
y and 
connector cab
le
.
Chec
k S4050 and 
connector cab
le
.
Are Q3806 and Q3801  nor
mal?
Are T3701 
pr
imar
per
ipher
y,
 Q3703, 
Q3705 and S4050  shor
t-circuited?
20
LC-15L1E
TROUBLE SHOOTING TABLE
 (Continued)
No picture (1/2)
No picture at all
No picture f
or 
TV
No picture f
or 
Video 1
No picture f
or 
Video 2
Chec
k that micr
ocomputer adjustment pr
ocess men
u
 is set correctl
y
.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
No SCAR
T R/G/B
NO
NO
YES
YES
YES
YES
YES
No picture f
or 
Video 3
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
No picture (2/2)
Chec
k that micr
ocomputer adjustment pr
ocess men
u is set correctl
y
.
NO
NO
No colour
No colour f
or 
TV
No colour f
or 
Video 2
No colour f
or 
Video 3
No colour f
or 
Video 1
No colour f
or 
Video 4
Chec
k that micr
ocomputer adjustment pr
ocess men
u
 is set correctl
y
.
NO
No picture f
or 
TV
, Video 
1,
 Video 2 and 
Video 3
No  picture 
Is IC801 
I/O 
nor
mal?
Is IC1201 
I/O 
nor
mal?
Chec
k LCD panel 
voltage and w
a
ve
fo
rm
.
Chec
IC801 and 
per
ipher
y.
Are inputs 
at pins (2), 
(3) and (4) 
of IC5408 
normal?
Are inputs 
at pins (1), 
(2), (3) and 
(79) of 
IC5401 
nor
mal?
Chec
k outputs 
at pins (40), 
(39), (38), (37), 
(34), (33), (32) 
and (31) 
of IC5401.
Chec
IC5408 and 
per
ipher
y.
Is IC5402 
I/O 
normal?
Is input at 
pin (73) of 
IC5401 
nor
mal?
Chec
IC5402 and 
per
ipher
y.
Chec
po
w
er line
.
Chec
rele
v
ant 
line
.
Chec
rele
v
ant 
line
.
Is input at 
pin (7) of 
IC5402 
nor
mal?
Chec
rele
v
ant 
line
.
Is input at 
pin (12) of 
IC5402 
nor
mal?
Are inputs 
at pins (72) 
and (73) of 
IC801 
nor
mal?
Chec
k SY 
line
, SC line 
and 
per
ipher
ies
.
Chec
IC5402 and 
per
ipher
y.
Is IC5402 
output 
nor
mal?
Chec
IC5402 and 
per
ipher
y.
Is IC5402 
output 
nor
mal?
Chec
IC5402 and 
per
ipher
y.
Is IC5402 
output 
nor
mal?
Chec
tuner and 
per
ipher
y.
Is input at 
pin (9) of 
IC5402 
nor
mal?
Chec
rele
v
ant 
line
.
No 
Video 1 output 
fr
om SCAR
T1
Is output at pin (5) 
of IC5202 nor
mal?
Chec
k IC5202 and 
its per
ipher
y.
Is output at pin (4) 
of IC5202 nor
mal?
Chec
k IC5202 and 
its per
ipher
y.
NO
Is output at pin (19) 
of SCAR
T nor
mal?
Chec
k rele
v
ant line
.
NO
Is output at pin (40) 
of SCAR
T nor
mal?
Chec
k rele
v
ant line
.
No 
Video 2 output 
fr
om SCAR
T2
Chec
IC5402 and 
per
ipher
y.
Are v
oltages 
at pins (1), 
(13) and (15) 
of tuner 
nor
mal?
Is output at 
pin (23) of 
tuner nor
mal?
Is IC5402 
output 
nor
mal?
Check 
relevant line.
Is input at 
pin (47) of 
IC5402 
nor
mal?
Chec
rele
v
ant 
line
.
Chec
IC5401 and 
per
ipher
y.
Chec
IC1201 and 
per
ipher
y.
Is IC801 input nor
mal?
Chec
k IC801 and per
ipher
y.
21
LC-15L1E
TROUBLE SHOOTING TABLE
 (Continued)
No sound
No sound fr
om both speaker
s
No sound from headphone?
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
消音を
Chec
k X3201 per
ipher
y.
Chec
k IC3201 per
ipher
y.
No sound in all input modes (TV and 
Video 
1/2/3/4)?
Chec
k the f
o
llo
wing.
1
 Is the v
o
lume not lo
w?
2
 Is the set not m
u
ted?
3
 Is headphone not inser
ted?
Is v
o
ltage nor
mal at pin (9) (po
w
er input ter
m
inal) 
of IC3206? (Appro
x
. +15V)
Is v
o
ltage nor
mal at pin (5) (standb
y control 
ter
m
inal) of IC3206? (Appro
x
. +1.8V)
Is control signal input a
vailab
le at each pin of IC3201?
Pin (2) of IC3201 SCL1
Pin (3) of IC3201 SD
A1
Is oscillation w
a
ve
fo
rm
 nor
mal at pins (71) and (72) of 
IC3201?
Is audio signal output a
vailab
le at pins (27) (Rch) and 
(28) (Lch) of IC3201?
Chec
k pins (27) (Rch) and (28) (Lch) of IC3201 up to 
pins (4) (Rch) and (2) (Lch) of IC3206, as w
ell as the 
per
ipher
ies of IC3204, IC3205 and IC3207.
Is po
w
e
r v
o
ltage nor
mal in each circuit?
Pin (8) of IC3204, IC3205 and IC3207, and pin 
(39) of IC3201                                     Appro
x
. +8V
Pins (11), (12), (13), (65) and (66) of IC3201
                                                            Appro
x
. +5V
Chec
k again after doing the f
o
llo
wing.
1
Raise the v
o
lume
.
2
 Cancel the m
u
te
.
3
 Remo
v
e
 the headphone
.
Chec
k headphone jac
k, speak
er and 
speak
er cab
le
.
Chec
k A
C
 adapter up to pin (7) of IC3206.
Chec
k pin (56) of IC2001 up to Q3206.
Chec
k pins (25) and (26) of IC2001 up to 
pins (2) and (3) of IC 3201.
Chec
k the f
o
llo
wing.
+8V line
....Chec
k Q3713 per
ipher
y up to 
pin (8) of IC3204, IC3205 and 
IC3207, and pin (39) of 
IC3201.
+5V line
....Chec
T3701 output 
B5V500MA line up to each 
+5V input pin of IC3201.
Chec
k the f
o
llo
wing.
1
 No 
TV sound....Chec
k the per
ipher
ies 
of Q5212, Q5213, Q5214 and 
TU5201.
2
 No 
Video 1 sound....Chec
k pins (2) 
and (6) of SCAR
T up to pins (57) and 
(56) of IC5901.
3
 No 
Video 2 sound....Chec
k pins (22) 
and (27) of SCAR
T up to pins (54) 
and(53) of IC5901.
4
 No 
Video 3 sound....Chec
k J5201 up 
to pins (51) and (50) of IC5901.
5
 No 
Video 4 sound....Chec
k J3201 up 
to pins (54) and (53) of IC3201.
Chec
k that micr
ocomputer adjustment pr
ocess men
u is set correctl
y
.
NO
NO
No A
udio 1 output 
fr
om SCAR
T1
Are outputs at pins 
(36) and (37) of 
IC5901 nor
mal?
Chec
k IC5901 and 
its per
ipher
y.
Are outputs at pins 
(33) and (34) of 
IC5901 nor
mal?
Chec
k IC5901 and 
its per
ipher
y.
NO
Are outputs at pins 
(7) and (1) of IC5903 
nor
mal?
Chec
k rele
v
ant line
.
NO
Are outputs at pins 
(7) and (1) of IC5902 
nor
mal?
Chec
k rele
v
ant line
.
NO
Are outputs at pins 
(1) and (3) of SCAR
nor
mal?
Chec
k rele
v
ant line
.
NO
Are outputs at pins 
(22) and (24) of 
SCAR
T nor
mal?
Chec
k rele
v
ant line
.
No A
udio 2 output 
fr
om SCAR
T2
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