DOWNLOAD Sharp LC-32D12E Service Manual ↓ Size: 6.8 MB | Pages: 110 in PDF or view online for FREE

Model
LC-32D12E
Pages
110
Size
6.8 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-32d12e.pdf
Date
PREV: Sharp LC-32CT2E (serv.man8) Service Manual / Technical Bulletin

Sharp LC-32D12E Service Manual ▷ View online

12.7. No Sound Problem
Problem: No audio at main TV speaker outputs.
Check supply voltages of VDD_AUDIO, 5V_VCC and 3V3_VCC with a voltage-meter.
There  may  be  a  problem  in  headphone  connector  or  headphone  detect  circuit  (when 
headphone  is  connected,  speakers  are  automatically  muted).  Measure  voltage  at 
HP_DETECT pin, it should be 3.3v. 
12.8. No Sound Problem at Headphone
Problem: No audio at headphone output.
Check HP detect pin, when headphone is. Check 8V_VCC with a voltage-meter.
12.9. Standby On/Off Problem
Problem:
Device cannot boot, TV hangs in standby mode.
There may be a problem about power supply. Check 12V_VCC, 5V_VCC and 3V3_VCC 
with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest 
SW. Additionally it is good to check SW printouts via hyper-terminal (or Teraterm). These 
printouts may give a clue about the problem.
DVD Problems
Problem: DVD is not working.
Check  that  DVD  source  is  selected  in  Service  menu. Check  supply  voltage  of  DVD 
namely 12V_VCC.
12.10. No Signal Problem
Problem: No signal in TV mode.
Check  tuner  supply  voltage;  5V_TUN.  Check  tuner  options  are  correctly  set  in  Service 
menu. Check AGC voltage at RF_AGC pin of tuner.
ACT_ANT
8V_VCC
S179
RF_AGC_SW
BC848B
Q151
3
2
1
22k
R1193
2
1
22k
R1192
2
1
IF_AGC_TUN
S44
2
1
S43
2
1
5V_TUN
S105
2
1
SDA_TUN
S107
2
1
S109
2
1
SCL_TUN
S106
2
1
S69
2
1
ADDRESS_SEL_TUNER
S110
2
1
S15
2
1
S17
2
1
S62
C1111
47p 
2
1
10n 
L20
47p 
C1109
16V
10u 
C264
S185
R847
22k
ACT_ANT
100R
R437
BC848B
Q116
3
2
1
SCL_TUNER
SDA_TUNER
17mb61
15
TUNER
8
7
6
5
4
3
2
1
A
B
C
D
E
F
A X M
1
2
3
4
5
6
7
8
A
B
C
D
E
F
OF:
A3
PROJECT NAME :
VESTEL
SCH NAME :
DRAWN BY :
SHEET:
12-01-2010_13:22
<DRAWING NAME HERE>
<YOUR NAME HERE>
SDA_TUNER
S108
2
1
C428
47p 
2
1
S73
2
1
OVER_CUR_DETECT
R92
10k
2
1
TDTC-G101D
TU1
12
11
10
9
8
7
6
5
4
3
2
1
ANT_PWR
B1
RF_AGC
SCL
SDA
B2
NC
AS
IF_AGC
DIF2
DIF1
AIF
R91
10k
2
1
IF_AGC_TUNER
50V
1u 
C401
2
1
10V
100n 
C128
2
1
22k
R595
2
1
SCL_MSB1222
SDA_MSB1210
SDA_MSB1222
5V_TUN
IFAGC_MSB1210
5V_TUN
10V
100n 
C440
TP152
1
5V_TUN
10k
R88
2
1
10V
100n 
C148
2
1
IF_AGC_TUN
IF_AGC_TUN
10k
R118
2
1
R351
1k
2
1
TH1
2R1
2
1
DIGITAL_IF_N
DIGITAL_IF_P
SDA_TUN
SCL_TUN
SCL_TUNER
RF_AGC_TUNER
T_AGC
SDA_TUN
VTUNE
C570
10V
10u 
SCL_TUN
ANT_CTRL
R664
4R7
2
1
Q36
BC848B
3
2
1
Q59
FDN336P
3
2
1
5V_TUN
ANALOG_IF
5V_TUN
ADDRESS_SEL_TUNER
D37
1N4148
2
1
C427
47p 
50V
2
1
C426
47p 
50V
2
1
R208
47R
2
1
47R
R207
2
1
L3
1u 
2
1
IDTV_SW
4k7
R254
2
1
74HCT4053
U115
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2Y1
2Y0
3Y1
3Z
3Y0
E
VEE
GND
S3
S2
S1
1Y0
1Y1
1Z
2Z
VCC
IF_AGC_TUNER
SCL_MSB1210
IFAGCMSB1222
S39
2
1
10V
100n 
C137
2
1
5V_TUN
ADDRESS_SEL_TUNER
F3
60R
2
1
VTUNE
5V_TUN
R337
1k
2
1
C268
1u 
50V
2
1
S40
2
1
ANALOG_IF
C1110
47p 
50V
C271
10u 
10V
5V_TUN
2V8_MSB
1k
R336
R323
1k
F60
330R
2
1
Q7
BC848B
3
2
1
10V
100n 
C422
2
1
R698
1k
16V
47u 
C404
2
1
25V
10u 
C338
LM1117
U25
4
3
2
1
GND
OUT
IN
VOUT
60R
F1
2
1
T_AGC
R677
560R
330R
F58
2
1
C402
47u 
16V
2
1
U26
LM1117
4
3
2
1
GND
OUT
IN
VOUT
C449
100u 
16V
R436
100R
S61
8V_VCC
5V_TUN
1k6
R667
560R
R675
715R
R679
220R
R435
3V3_IF
5V_IF_SUP
F18
60R
2
1
5V_VCC
R440
220R
5V_VCC
5V_VCC
S63
Q43
BF799
3
2
1
L12
1u 
2
1
1u 
L5
2
1
6k8
R746
C478
10n 
10n 
C475
1k
R701
5V_TUN
R747
680R
2
1
C462
100p 
50V
10n 
C483
16V
47u 
C488
2
1
22R
R749
R748
22R
C474
10n 
10n 
C479
R745
6k8
2k2
R691
R693
2k2
22k
R735
L2
1u 
2
1
1u 
L10
2
1
82R
R750
K3958M
Z1
4
1
5
3
2
IN2
GND
OUT2
IN1
OUT1
K9656M
Z2
4
1
5
3
2
IN2
GND
OUT2
IN1
OUT1
C487
47u 
16V
2
1
C473
10n 
5V_TUN
330R
F91
2
1
BC848B
Q1
3
2
1
D48
BA782
220k
R752
R751
220k
C482
10n 
SAW_SW
SAW_SW
2k2
R692
S115
S120
1u 
L4
2
1
L11
1u 
2
1
10V
100n 
C431
C399
100n 
10V
SIF_1
SIF_2
50V
33p 
C455
C456
33p 
50V
C403
100n 
10V
C432
100n 
10V
VIF_1
VIF_2
C339
10u 
25V
47k
R829
RF_AGC_TUNER
5V_TUN
100k
R831
100k
R832
S174
2
1
IF_AGC_TUNER
SDA_TUNER
SCL_TUNER
S176
2
1
SDA_MSB1210
IFAGC_MSB1210
SCL_MSB1210
S175
2
1
U34
FSA3157
6
5
4
3
2
1
B1
GND
B0
A
VCC
S
5V_TUN
RF_AGC_SW
5V_TUN
22k
R830
2
1
BC848B
Q17
3
2
1
5V_TUN
4k7
R815
2
1
RF_AGC_TUNER
R814
4k7
2
1
AGC_SENSE
LM1117
U18
4
3
2
1
GND
OUT
IN
VOUT
C1122
47p 
50V
2
1
50V
47p 
C1124
2
1
C1121
47p 
50V
2
1
50V
47p 
C1123
2
1
SDA_MSB1222
SDA_MSB1210
SCL_MSB1222
SCL_MSB1210
S229
2
1
S230
2
1
RFAGC_MSB1210
ACT_ANT
DIGITAL_IF_N
DIGITAL_IF_P
Samsung/Ntune
2
2
2
2
1
1
1
N.C.
CLOSE TO DEMOD
S1,S2,S3=1-->X1=Z
S1,S2,S3=0-->X0=Z
This part must be placed near the tuner
ACTIVE ANTENNA
ADRRESS SEL:1-->ADDR=C2
ADRRESS SEL:0-->ADDR=C0
NC
CAN TUNER:BJT
CAN TUNER
LG
NC
nc
nc
nc
NC
S:0-->B0=A
S:1-->B1=A
nc
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