DOWNLOAD Sharp LC-13B4E (serv.man2) Service Manual ↓ Size: 6.61 MB | Pages: 80 in PDF or view online for FREE

Model
LC-13B4E (serv.man2)
Pages
80
Size
6.61 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-13b4e-sm2.pdf
Date
PREV: Sharp LC-13B4E Service Manual / Specification

Sharp LC-13B4E (serv.man2) Service Manual ▷ View online

21
LC-13B4E
LC-15B4E
TROUBLE SHOOTING TABLE
 (Continued)
No sound (1/2)
Check all the settings microprocessor's adjust process menu.
Is the pin (53) of 
IC2001 in the 
"L" state?
Is output at pins
(27) and (28) of 
IC1901 normal?
Is output at pins
(1) and (7) of 
IC1905 normal?
Yes
Yes
No
No
No
No sound 
from front 
speakers
Yes
Muting effect is 
on. Check the 
FSMUTE line.
Check IC1901 
and its
peripheral parts.
Check IC1905 
and its
peripheral parts.
Is the pin (52) of 
IC2001 in the 
"L" state?
Is output at pins
(24) and (25) of 
IC1901 normal?
Is output at pins
(1) and (7) of 
IC304 normal?
Yes
Yes
No
No
No
Yes
Muting effect is 
on. Check the 
HP_MUTE line.
Check IC1901 
and its
peripheral parts.
Check IC304 
and its
peripheral parts.
No sound 
from 
headphone
TV sound 
failure
Is output at pins
(33) and (34) of 
IC1901 normal?
Is output at pins
(1) and (7) of 
IC3501 normal?
Check IC1901 
and its
peripheral parts.
Check IC3501 
and its
peripheral parts.
Yes
No
No
No
No sound 
from output 
line
Check the tuner 
and its
peripheral parts.
Yes
No
Is output at pin 
(11) of Tuner 
normal?
Is input at pin 
(67) of IC1901.
Check IC1901 
and its 
peripheral 
parts.
Check 
Headphone Jack 
and connection 
cable.
No
Is output at pins 
(8) and (12) of 
IC3301 normal?
Check IC3301 
and its
peripheral parts.
Check front 
speaker and 
connection 
cable.
Yes
22
LC-13B4E
LC-15B4E
No sound (2/2)
Check all the settings microprocessor's adjust process menu.
Yes
No
No
No sound from SCART
No
SCART sound failure
Yes
No
Check IC1901 and its 
peripheral parts.
Is output at pins (36) and (37) of 
IC1901 normal?
Check IC1902 and its 
peripheral parts.
Is output at pins (1) and (7) of 
IC1902 normal?
Check their lines and their 
peripheral parts.
Is input at pins (53) and (54) of 
IC1901 normal?
Check IC1901 and its 
peripheral parts.
Is output at pins (27) and (28) of 
IC1901 normal?
23
6
5
4
3
2
1
A
B
C
D
E
F
G
H
LC-13B4E
LC-15B4E
CHASSIS LAYOUT
MAIN Unit
TUNER Unit
R/C, LED Unit
OPERATION Unit
INVERTER Unit
24
8
7
10
9
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
LC-13B4E
LC-15B4E
BLOCK DIAGRAM
TUNER
SIF1
ANA_IN1+
MSP
(AV1)
AUDIO IN
TV_V
AUDIO OUT
VIDEO OUT
TV/AV
AMP
SDA/RXD
 
SCL/TXD
S
SY
(AV2) INPUT
+3.3V
+5V
+1.8V
+3.3V
ANTENNA
AI_L/R
SC2_IN_L/R
DACM_L/R
SC3901
SCART
VIDEO IN
SC_R/G/B
I
2
C/UART
SC5001
IC806
IC808
V1.SY
SELECTOR
SC_L/RO
IC1902
I
2
C
I
2
C
AUDIO AMP
SC1_IN_L/R
IC1901
SC1_OUT_L/R
DACA_L/R
A
REG IC1607
REG IC1605
+
3.3V
REG IC703
+8V
+9V
L
S
I
2
C
 
VP
E
2
PROM
IC2010
MICON
IC2001
CVBS/SY_IN
SYNC SEP
IC802
CSYNC
I
2
C
UART
VPC
IC801
SC_IN
R/G/B_IN
V2VO
CHROMA
SELECTOR
IC803
SC
AMP
IC808
V1_V
J5003
J5001
VIDEO
(AV2) INPUT
AUDIO
(AV2) INPUT
V1.L/R
REG
 
IC2003
INVVCC
Q3703 
PWM IC3701
SIGVCC
DC/DC
CONVERTER
T3701
PAVCC
J3701
DC12V
INPUT
REG IC2004
REG IC707
REG IC705
+5V
+3.4V
+34V
Q3708
IC3702
+3.3V
Q3707
Q3709
REG IC706
Q3705
+23V
+17V
VOLTAGE
CONVERTER
IC702
–11V
+32V
B12V1A
REG IC1602
REG IC704
REG IC805
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