DOWNLOAD Sharp LC-28HM2E (serv.man3) Service Manual ↓ Size: 689.03 KB | Pages: 15 in PDF or view online for FREE

Model
LC-28HM2E (serv.man3)
Pages
15
Size
689.03 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Chassis layout, Description of majoy IC functions, Block diagram, Overall wiring diagram, Description of schematic diagram, Waveforms - page 49-63
File
lc-28hm2e-sm3.pdf
Date
PREV: Sharp LC-28HM2E (serv.man2) Service Manual

Sharp LC-28HM2E (serv.man3) Service Manual ▷ View online

57
LC-28HM2
AN-28SP2
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
PRINTED WIRING BOARD BLOCK DIAGRAM (AVC SYSTEM)
AD 
CONVERTOR
SCALOR   IC
AVC SYSTEM
MPU
OSD
CONTROL
PICTURE SIGNAL
ENCODER
PICTURE
PROCESSING IC
SETS
DC/DC BLOCK
DC POWER SUPPLY
INPUT SIGNAL  SELECTOR IC
(ANALOG, DIGITAL)
PC  SYNC   BUFFER
RS232C
DRIVER
PC BOARD POWER
SUPPLY
PC COMPONENT
SOUND
VIDEO
S-SIGNAL
ANALOG SIGNAL
SELECTOR
3D Y/C SEP. IC
BLOCK
CRYSTAL FOR
3D Y/C
AV INPUT 2
VIDEO
SYNC.
SEPARATOR
IC
AUTO WIDE IC
PC SIGNAL
PICTURE 
FOR
AV 
SYNC. 
 
FOR AV 
 
PC SYNC.
AV  INPUT
OUTPUT
CRYSTAL FOR
VIDEO
DECODER
Y/C SEPARATE
IC
MEMORY
 FOR
Y/C SEP IC
FIELD MEMORY
FOR 3D Y/C SEP. IC
DECODER
SOUND 
CONTROL 
FOR 
HEADPHONE
Æ
 PC I/F unit
Æ
 Main Unit
58
LC-28HM2
AN-28SP2
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
MULTI COLOR SYSTEM BLOCK DIAGRAM
IX3282CE
BU4053V
ADC704++
T
A1318AN
NRON/
 
NR-OFF_2
IC6004
N358-C
N358-C
SECAM C
COMB 
Y
COMB C
VIDEO1
3
INPUT
V1
2_Y
INPUT
V1
2_C
INPUT
BPF
IC401
INPUT
 SELECT
3
          
10
5
          5
8
1
2
                            
1
 
                                     5
6
8
 
        5
3
 
                 4
9
15
IC6004
VIDEO
SWITCH
9(H)
            6
8(L)
1(H)
            3
16(L)
IC853
DIGIT
AL
Y/C SEP.
        2
5
3
        2
3
IC6009
VIDEO SWITCH
16(L)
             
             3
 
1 (H)
              
            
14(H) 
 
1
1(L)
 
             
             
     5
      
                   
9(H) 
 
 
 
8(L)
 
 
             
  
     6
3D 
Y/C SEP.NR
for NTSC
1
1(L)
       5
14
PAL/NTSC
SECAM
S/VIDEO
IC6010
VIDEO SWITCH
 5
        
            
 
   
         
            3
   
      
            1
IC801
VIDEO/CROMA
SYNC.
1
3
 
          1
5
4
 
   5
 
  6
 
 
1
7
51 
 
52 
 
53 
 
3
1
IC2802
Color 
TV
SECAM
 
24 
 
10 
 
1
1
14(V_VSync) 
 
 
15(V_HSync)
SC503
 
INPUT
 SIGNAL
T
O
 PC BOARD
3 (PCR)
1(PCB)
 
2(PCG)
CLAMP
AMP
IC7201
37
AUT
OWIDE
IC1901 
        3
SYNC. SEP.
  4
2
1
   2
3
 
  1
5
    
IC2801
 
1Hdelay
29
(B
Y)
26
30 
 
(R
Y)
27
C1.
Y
C1.
PB
C1.
PR
C2.
Y
C2.
PR
C2.
PB
R
  B
  G
IC402
IN-SELECT
9(H)
6
8(L)
IC406
P-SELECT
1,14,9(H)
3,5,6
16,1
1,8(L)
IC415~417
P-SELECT
9
4
8
2
Y
Y
B
Y
R
Y
PCG,
PCR,
PCB
Y_SEL,
PB_SEL,
PR_SEL
R
Y
B
LPF
IC407
VIDEO SWITCH
         (
L
)
 
         (
H
)
NR-ON/
 
N
R-OFF
PAL/NTSC
PASS/
NR_COMB
480i
N358
 
CVIDEO
       
 Y
 
 C
       
 R
-Y
,B
-Y
          C
V
ID
E
O
PA
L
 
     
Y
PALM 
 
 
 
C
N443
 
 
 
SECAM 
 
CVIDEO
          
Y
          C
JUGDEMENT
 of COLOR SYSTEM
          C
V
ID
E
O
/Y
          C
CXA2069Q
TC9090A
F
NJM2283V
IC7001
PD64082
NJM2283V
IX3323CE
T
AI229N
NJM2235M
NJM2234M
M52055FP
T
A8772AN
M52055FP
(L)
(H)
(L)
(H)
Q6015
Q6017
59
LC-28HM2
AN-28SP2
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
OVERALL WIRING DIAGRAM-1/2 (DISPLAY)
8
PS_ON
7
MMW
6
GND
5
Vin 13V
4
Vin 13V
3
GND
2
GND
1
INV_ON
CN1
V4 3.3V
GND_S
V3 5V
GND
MMV
GND
V5 -4.5V
GND
1
2
3
4
5
6
7
8
CN3
V6 -15V
GND
D-MPOW
V1 +28V
D-POW
SOUND_M
INV-ON
M+BADJ
9
10
11
12
13
14
15
16
Vin
V2 9V
17
18
P3601
1
IREM
2
+5V
3
GND
4
LEDPOW
5
PL1
P3502
4
PR1
3
SR1
2
SL1
1
GND
P3501
3
KEY1
2
KEY2
1
GND
INV_VCC1
1
2
P6101
1
2
P6105
1
2
P6106
1
2
P6103
1
2
P6102
1
2
P6104
1
2
P6107
INV_VCC2
1
2
P6201
1
2
P6207
1
2
P6206
1
2
P6205
1
2
P6204
1
2
P6203
1
2
P6202
1
H_GND7
2
H_GND8
3
H_GND9
4
H_GND10
5
H_GND11
6
H_GND12
P6307
1
2
P6305
1
2
P6302
1
2
P6301
1
2
P6303
1
2
P6304
1
2
P6306
P2002
1
KEY1
2
KEY2
3
GND
1
2
P601
1
2
P602
1
2
P603
1
2
P604
1
2
P605
1
2
P606
P2003
4
IREM
3
+5V
2
GND
1
LEDPOW
1
NC
2
INV_GND
P608
6
H_GND7
5
H_GND8
P607
4
H_GND9
3
H_GND10
2
H_GND11
1
H_GND12
P1302
4
SOUND_L
3
GND(S)
2
SOUND_R
1
V_COM
1
+3.3V
GND_S
P2001
+5V
GND
+5V
GND
-7.5V
GND
-14V
GND
D-MPOW
+30V
D-POW
SOUND_M
D-INV-ON
V_REFADJ
+13V
+9V
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SYSTEM
CN
1
N
2
L
CN3
PS_ON
+5V
GND
+13V
+13V
GND
GND
INV_ON
1
2
3
4
5
6
7
8
CN9
5
PL1
CN2
4
PR1
3
SL1
2
SR1
1
FG
1
VH
2
1
VH
2
VL
1
2
CN8
AC-IN
2
PL1
1
SL1
CN1
CN2
4
V_COM
3
SOUND_R
2
GND(S)
1
SOUND_L
BOSE
LAMP-1
UNIT
CONTROL UNIT
MAIN UNIT
LAMP-GND 
UNIT
LAMP-2 
UNIT
SC4304
SC4305
SC4307
SC4303
SC4302
SC4306
QCNW-5638CEZZ
QCNW-5740CEZZ
QCNW-5727CEZZ
QCNW-5641CEZZ
QCNW-5642CEZZ
QCNW-5759CEZZ
QCNW-5643CEZZ
QCNW-5701CEZZ
QCNW-5645CEZZ
QCNW-5645CEZZ
QCNW-5645CEZZ
QCNW-5645CEZZ
QCNW-5645CEZZ
QCNW-5645CEZZ
QCNW-5726CEZZ
QCNW-5655CEZZ
J4001
CN1
DUNTKA169DE03
DUNTKA170DE03
DUNTKA171DE03
DUNTKA173DE03
DUNTKA168DE01
RDENC0321CEZZ
RDENC0309CEZZ
RDENC0323CEZZ
DUNTKA172DE03
P3503
2
MAIN-DT
1
5V
P2004
5V
MAIN-DT
1
2
CN3
CN4
QCNW-5636CEZZ
QCNW-5637CEZZ
H_GND1
NC
H_GND2
NC
H_GND3
NC
H_GND4
NC
H_GND5
NC
H_GND6
NC
H_GND8
NC
H_GND11
NC
H_GND12
NC
H_GND10
NC
H_GND9
NC
H_GND7
NC
LAMP_1
LAMP_2
LAMP_3
LAMP_4
LAMP_5
LAMP_6
LAMP_7
LAMP_8
LAMP_9
LAMP_10
LAMP_11
LAMP_12
1
SOUND_M
2
GND_S
CN2
GND
GND
GND
R/C RECEIVER UNIT
POWER UNIT
DC/DC UNIT
60
LC-28HM2
AN-28SP2
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
OVERALL WIRING DIAGRAM-2/2 (DISPLAY)
DC/DC unit
LCD controller circuit
Audio LR drive circuit
To BOSE speaker (AMP side)
Panel link cable
To AVC station
AC power cable
AC inlet/3P
Remote control receiver/LED PWB
To 
gate driver
AMP power unit
SP
To source driver
To source driver
To source driver
To source driver
To source driver
To source driver
Lamp GND 
PWB
Operation/SW
 PWB
POW
KEY
SD_1
SD_2
SD_3
SD_4
SD_5
SD_6
LAMP1
AC
POW
AMP
DDIN
DDIN
DCDC
LINK
LINK
BOSE
BOSE
LR
REM
LR
LG
AC
HV_1
HV_2
HV_3
HV_4
HV_5
HV_6
HV_7
HV_8
HV_9
HV_10
HV_11
HV_12
LAMP2
GD
LG
LAMPG
FFC_1
FFC_1
FFC_1
FFC_1
FFC_1
FFC_1
FFC_2
BOSE speaker 
(AMP side)
REM
AMP
Lamp PWB 1
LG_1
LG_2
LG_3
LG_4
LG_5
LG_6
LG_7
LG_8
LG_9
LG_11
LG_12
LG_10
KEY
 Control PWB
For VESA spec mount
2P connector.  Connect inside of door.
47
480
220
157
20
180
37
168
DCDC
LAMP2
Lavel 374
LAMP1
Panel link decoder circuit
Backlight/main power unit
LAMPG
110
Lamp PWB 2
Connector 
cable
Microcomputer 
circuit
Gradation 
control power 
circuit
Lamp 
disconnection 
protector 
circuit
Connector 
cable
BOSE speaker
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