Sharp LC-37HV4E (serv.man20) Service Manual ▷ View online
13
LC-37HV4E
9.Open six FFC cable holders and remove the three FFC holder (right & left) fixing screws each and all the connec-
tors of flat cables (FFC), and take off the FFC holders (right & left).
10.Remove the Speaker-L and-R PWB fixing screws each and the connectors of them, and take off the Speaker-L
and-R PWBs.
11.Remove the two R/C, LED PWB fixing screws and the connector, and take off the R/C,LED PWB.
12.Remove all the connectors from each PWB.
(Main PWB; 10 points, Power PWB; 5 points, Audio PWB; 3 points, Inverter -1 PWB 7; points, Inverter -2 PWB; 4
points, Inverter -3 PWB 7; points, and Inverter -4 PWB; 4 points.)
9
10
10
9
11
FFC cable holder (left)
FFC cable holder (right)
Cable holder
Cable holder
Speaker-L PWB
Speaker-R PWB
R/C, LED PWB
CN4101
CN4102
P101
P203
P202
P3811
SC4603 SC4601
SC4604SC4602
CN7004
CN4101
CN2004
CN2002
CN4701
CN4702
CN4702
CN3702
CN3701
CN3782
P7505
P7506
P7507
CN2702
P7554
P3801
P3802 P3803
P3811
P7644
P7647
P7618
P7619
P7616
CN7705
CN2003
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
Inverter -3 PWB
Inverter-4 PWB
Inverter-2 PWB
Inverter -1 PWB
Main PWB
Audio PWB
Power PWB
14
LC-37HV4E
13.Remove the five main PWB fixing screws, and take off the main PWB.
14.Remove the six power PWB fixing screws, and take off the power PWB.
15.Remove the four audio PWB fixing screws, and take off the audio PWB.
16.Take off the inverter-1 PWB.
17.Remove the three inverter-2 PWB fixing screws, and take off the inverter-2 PWB.
18.Take off the inverter-3 PWB.
19.Remove the three inverter-4 PWB fixing screws, and take off the inverter-4 PWB.
20.Remove the two chassis fixing screws and take off the chassis.
14
17
16
18
13
19
15
Main PWB
Inverter-3 PWB
Inverter-4 PWB
Audio PWB
Power PWB
Inverter-2 PWB
Inverter-1 PWB
20
Chassis
15
LC-37HV4E
•
Handling Precautions for LCD Panel
1. Work in a clean room. (Humidity above 50%)
2. Operators should wear an earthing band.
3. Do not give a shock such as falling and vibration.
4. Use the ionizer. (Within 30 cm)
21.Remove the six LCD panel fixing screws and take off the LCD panel unit.
22.Remove the three sheet angle fixing screws, and take off the sheet angle.
23.Take off the reflection/deflection sheet, prism sheet, diffusion sheet and diffusion panel.
24.Remove the three lamp holders (top & bottom) fixing screws each, and take off the lamp holders (top & bottom).
25.Take off the lamp assembly from the lamp clip.
21
21
LCD panel unit (front)
25
24
24
23
22
22
22
22
Reflection panel
Lamp assembly (7 sets)
Lamp holder (top)
Lamp holder (bottom)
Lamp holder (top)
Lamp holder (bottom)
Diffusion sheet
Prism sheet
Reflection/deflection sheet
Sheet angle
Sheet angle
Diffusion panel
Sheet angle
LCD panel unit
16
LC-37HV4E
ADJUSTMENT PROCEDURES
Though the best adjustment is made at shipment from the factory, the following adjustment is required if the value
should be deviated or some adjustment is needed after replacement of parts.
should be deviated or some adjustment is needed after replacement of parts.
Display Side:
1. Preparation for Adjustment
1. Preparation for Adjustment
The unit needs to be replaced when the AVC System CONFIGROM/IC2202, receiver IC2206 and HDCP key
ROM/IC2208 are replaced.
Applicable unit: DKEYHB453FE50
ROM/IC2208 are replaced.
Applicable unit: DKEYHB453FE50
2. Adjustment
Enter Adjustment Process mode.
→
VLSBIAS/15V voltage adjustment
→
GRAY level/14.5V voltage adjustment
→
COMBIAS adjustment
→
Background adjustment
3. Entry to Adjustment Process mode
(1) For no connection of AVC System:
With the display main power off, while pressing the "INPUT" and "VOL(–)" keys on the display body top
together, turn on the display MAIN POWER. Then, starting is done at DISPLAY process mode.
together, turn on the display MAIN POWER. Then, starting is done at DISPLAY process mode.
(2) For connection of AVC System:
With the display main power off, while pressing the "CH (Down)" and "VOL(+)" keys on the display top
together, turn on the Display MAIN POWER. Then, starting is done at DISPLAY process mode.
together, turn on the Display MAIN POWER. Then, starting is done at DISPLAY process mode.
In both cases of the above (1) & (2), K is displayed on the screen upper left. Then, when some key is
pressed, the first page of DISPLAY ADJUST mode will start.
pressed, the first page of DISPLAY ADJUST mode will start.
~
If MAIN POWER is off, the adjustment process mode is released.
4. Key Operation List at Adjustment Process mode
Key
Cursor up
Cursor down
Cursor right
Cursor left
ENTER
INPUT
CH_UP
CH_DOWN
VOL_UP
VOL_DOWN
Function 1 (At page left end)
One item shift to up, Shift to previous
page (At top)
One item shift to down, Shift to next
page (At bottom)
One item shift to right, Page shift (At
initial page)
One item shift to left, Page shift (At
initial page)
Test pattern off
Shift to next page
One item shift to up, Shift to previous
page (At top)
One item shift to down, Shift to next
page (At bottom)
One item shift to right, Page shift/At
initial page
One item shift to left, Page shift (At
initial page)
Function 2 (At value variable)
Adjust value one increase or execution (At
W&R items)
Adjust value one decrease or execution (At
W&R items)
One item shift to right
One item shift to left
Item execution (At W&R items)
Shift to next page
Adjust value one increase or execution (At
W&R items)
Adjust value one decrease or execution (At
W&R items)
One item shift to right
One item shift to left
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