Sharp PN-655E (serv.man3) Service Manual ▷ View online
PN-655E
DISASSEMBLY AND ASSEMBLY
3 – 4
- REPLACEMENT AND REPAIR PROCEDURES OF LCD SUB PARTS -
■ INTRODUCTION
Replacement and repair procedures of the major units in the 65-type
LCD module horizontal type (LK645D3LZ19 (Current model)).
E Main unit
[Note for works]
1) Work in the clean room.
2) Precautions for handling the LCD panel.
1 Be sure to wear the earth band for handling the LCD panel.
2 Be sure to work on the conduction mat.
3 Do not fall or do not give vibrations.
4 Be sure to use the ionizer. (within 30cm)
5 Keep the humidity in the clean room at 50% or more.
1. INVERTER PWB
[Replacement procedure]
1) Remove the inverter cover.
2) Replace the inverter PWB.
2. C-PWB PWB
[Replacement procedure]
1) Remove the C-PWB cover.
2) Remove the cable, and replace the PWB.
[Adjustment after replacement]
• Opposed-type adjustment
• White balance adjustment
The above adjustments are required.
3. LCD PANEL
Clean room
Adjustment
Inverter PWB
-------
-------
C-PWB PWB
-------
Opposed-type adjustment, White balance
LCD panel
F
Opposed-type adjustment, White balance
Backlight
F
-------
Parts code
Position
RDENC2243TPZZ
2
RDENC2244TPZZ
13
RDENC2245TPZZ
5
RDENC2246TPZZ
46
1
2
3
4
5
6
Parts code
CPWBY3381TPZZ
PN-655E
DISASSEMBLY AND ASSEMBLY
3 – 5
4. BACKLIGHT
[1] Opposed adjustment
[Preparation]
■ Connection
1) Before connecting the harness, etc., check to confirm that the
power of the unit, the switch of the simple signal circuit, and the
power of the lighting harness 1 are turned OFF.
2) Connect the lighting harness 1 and the lighting harness 2 to the
lighting 5V12V power.
3) Connect the lighting harness 2 to CN1 side of the simple signal cir-
cuit, and connect the DC harness to CN2 side.
4) Connect the DC harness to the electronic VR harness 1.
5) Connect the electronic VR harness 1 to DC IN side of the elec-
tronic VR adjustment BOX_D, and connect the electronic VR har-
ness 2 to OUTPUT side.
6) Connect the electronic VR harness 2 and the LVDS harness.
Model name
Parts code
LK645D3LZ19
KLMP-A079WJZZ
Sheet holding fixture
Sheet holding
fixture
fixture
Polarized reflection
sheet
sheet
Diffusion sheet
Diffusion plate
Lamp holder
Lamp holder
Lamp
Lamp clip
DC harness
Lighting harness 2
LVDS harness
Lighting harness 1
Electronic
VR harness
1
VR harness
1
Electronic VR
adjustment
BOX_D
adjustment
BOX_D
Electronic VR
harness 2
harness 2
Simple signal
circuit
circuit
Lighting 5V12V
power
power
Simple signal
circuit
circuit
DC harness
LVDS
harness
harness
Electronic VR
harness 1
harness 1
Electronic VR
harness 2
harness 2
Lighting 5V
12V power
12V power
Lighting
harness 2
harness 2
Electronic VR
BOX_D
BOX_D
Lighting
harness 1
harness 1
PN-655E
DISASSEMBLY AND ASSEMBLY
3 – 6
7) Connect the LVDS harness to the control PWB of the LCD module.
Note:
• Check to confirm that the switch of the simple signal circuit is
turned OFF, and then turn ON the power of the lighting harness 1.
• Since the electronic VR adjustment BOX_D is not used, do not
touch it.
• Take care not to cut off the cable.
1. Opposed bias adjustment
1) Turn ON the lighting harness 1.
* At that time, check to confirm that the jig is in the standby state.
* Check to confirm that the switch of the simple signal circuit is
turned OFF.
2) Turn ON the unit.
3) Turn ON the switch of the simple signal circuit.
4) Check the opposed bias adjustment screen of the simple signal cir-
cuit.
5) Adjust [UP] and [DOWN] keys of the electronic VR adjustment
BOX_D so that flicker of the opposed bias adjustment screen is
minimized.
6) After completion of the opposed bias adjustment, press [WRITE]
key of the electronic VR adjustment BOX_D until the lamp goes
OFF.
7) Turn OFF the switch of the simple signal circuit.
8) Turn OFF the unit.
9) Check to confirm that the POWER_LED goes off.
10) Turn OFF the lighting harness.
11) Disconnect the LVDS harness from the electronic VR harness 2.
12) Disconnect the electronic VR harness 1 from DC IN side of the
electronic VR adjustment BOX_D, and disconnect the electronic VR
harness 2 from OUTPUT side.
13) Disconnect the electronic VR harness 1 from the DC harness.
14) Disconnect the lighting harness 2 from CN1 side of the simple sig-
nal circuit, and disconnect the DC harness from CN2 side.
15) Disconnect the lighting harness 1 and the lighting harness 2 from
the lighting 5V12V power.
16) Connect the normal connectors to CN1 side and CN2 side of the
control PWB.
CN1
CN2
ON
OFF
WRITE
MODE
UP
DOWN
PN-655E
BLOCK DIAGRAM
4 – 1
CHAPTER 4. BLOCK DIAGRAM
AC input
Sensor
CN001
CN003
FILTER
CN1
CN002
CN1
LED
Switch
CN401,502
CN101
CN7
CN11
CN21
CN201,502
CN101
Power
CN801
CN3
CN22
CN701
䇭
CN
302,
303,
304
CN19
GPIO
CN501
䇭
CN
3
0
2
,3
03,
3
0
4
PAL/SECAM
CN3,4,5,6,7,8
Y
CN10
CN1
CN2
C
Power
NTSC
IC10
Genesis gm1601
LCD
CN6
CN2
CN4
Power
PC
DVI-D
connector
input
CN17
connector
output
PC
DVI-D
CN1
CN23A1
CN23B1
CN16
CN4
CN1
L
PC
Sound input
(3.5
㱂
pin jack)
R
CN2
L
Video Sound input
(RCA input)
R
L
Video/PC Sound output)
(RCA output)
R
CN3
Audeo Amp output
L
R
IC12
IC15
NT5DS4M32EG-5
IC14
AT49F040A
IC21
VPC3230D
IC20
MST9883
IC25
MAX3238
IC26
MAX3243
IC1
MSP3440
IC2
NJU2690
K
E
Y
L
E
D
IC11
BR24L16
Y1
14.318MHz
IC3
TA2024
I
R
䇭
IC28
PC16552
IC24
FLI2310
IC9
SiI1160
IC18
SiI1160
IC3
SM5301C
IC19
MT48LC2M32B2
EEPROM
EEPROM
IC5
SiI1161
IC13
PCF8575
IC22
UPD64084
Interf
ace unit 1
Not used
(Ho
w
e
v
e
r,
CN
is equipped)
Video component
(D port input)
Video component
(BNC input)
Video composite
(BNC input)
PC
D-sub15P
Analog
PC
D-sub9P
Serial
PC
D-sub9P
Serial
Thermistor
Receiver
Operation board
Power connector
Sub
Power unit
Main
Power unit
Inverter Power electric supply
Inverter
Inverter control
LCD unit
connector
Interf
ace unit 2
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