Sharp LC-20AV7U Support Question
Sharp LC-20AV7U Support Question
Find answers below for this question about Sharp LC-20AV7U.Need a Sharp LC-20AV7U manual? We have 1 online manual for this item!
Question posted by stephendedrick on November 29th, 2022
Can A Roof Antenna Be Hooked Up To This Tv For Local
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Current Answers
Answer #1: Posted by SonuKumar on November 29th, 2022 8:28 PM
SonuKumar
Member since:
May 9th, 2021 Points: 16,585,390
Member since:
May 9th, 2021 Points: 16,585,390
This type of antenna lets you watch HDTV shows, sporting events, and even local news in some locations. It's a simple set-up that doesn't require a contractor to fit the antenna or anyone risking climbing the roof. That's because it's designed to be "plug and watch" and to be installed inside the house.
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.
Regards,
Sonu
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Related Sharp LC-20AV7U Manual Pages
Service Manual - Page 1
SERVICE MANUAL
LCD COLOR TELEVISION
LC-20AV7U/LC-20SH7U
SERVICE MANUAL
S37F3LC20AV7U
LCD COLOR TELEVISION
MODEL LC-20AV7U
MODEL LC-20SH7U
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only ...
Service Manual - Page 2
...; load at speaker output terminal with L.P.F. Response
4. Limit >43 >45
Limit --------- Number of color. Resolution 4. Video S/N 2.
Audio S/N
Condition
Unit
80dB
dB
80dB
dB
Nominal -----
< LCD PANEL >
Description 1. Over Scan
2. Limit -------
±0.005 ±0.005
------- Audio Distortion 3. Limit 0.8/0.8 3.0/3.0
---->45/45 >45/45
The LCD...
Service Manual - Page 6
... the disassembly steps for the cabinet parts, and the CBA in reverse order. No.
CABINET DISASSEMBLY INSTRUCTIONS
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.
[ LC-20AV7U ]
1. No.
No.
When reassembling, follow the steps in order to gain access to item(s) to be serviced.
Service Manual - Page 9
TV Cable Wiring Diagram
Main CBA
CN401
Function CBA
CL1107
CN1301
To LCD Module
CN1202
CN1201
To LCD Module
CN402
Junction-A CBA
CL801
To Speaker
CN403 CN801
CN1302
CL1104
IR Sensor CBA
CN62
CN61
CN102 CN101
CN802
Junction-B CBA
CL802
DTV Module CBA Unit
To Speaker
Fig. D3
4-4
A7144_45DC
Service Manual - Page 10
[ LC-20SH7U ]
3. When reassembling, follow the steps in reverse order.
showing procedure of part location
(4) Identification of parts in the Table.
4-5
A7144_45DC Disassembly Flowchart
This flowchart ...
Service Manual - Page 13
TV Cable Wiring Diagram
Main CBA
CN401
Function CBA
CL1107
CN1301
To LCD Module
CN1202
CN1201
To LCD Module
CN402
To Speaker
CN403 CN801
CN1302
CL1104
IR Sensor CBA
CN62
CN61
CN102 CN101
DTV Module CBA Unit
CN802 To Speaker
Fig. D3
4-8
A7144_45DC
Service Manual - Page 14
...-CLR-R DT-CLR-B DT-TNT DT-SHR COR(C/D1) C-COR(C/D2) COB(C/D1) C-COB(C/D2)
Button (on table 1. Press the number after [MENU] on the TV unit simultaneously in the standby mode.
1. DC Voltmeter 2. o / p] to access next item. Also, do not attempt these adjustments only after replacing circuit components and certain...
Service Manual - Page 15
...select "C/D1" mode.
5-2
A7144EA Note: The optical receptor must be set perpendicularly to "1.
Refer to the LCD Panel surface. 4. [RF/INPUT1] Enter the Service mode. Initial Setting." [INPUT2]----(APL 20%) Press [3] button to ... Test Point Adj.
Press [VOL -] button on the TV unit.)
L = 3 cm
INPUT: WHITE 80%, 20% Color Analyzer
Note: Use the service remote control unit 1.
Service Manual - Page 16
... unit and press [1] on the service remote control (selecting "BRT" mode). [INPUT2] Press [MENU] button on the service remote control unit and press [3] on the TV unit.)
5-3
A7144EA Sub-Brightness Adjustment
Purpose: To get proper brightness.
Pattern Generator
See below
Figure
White A position B position
Black C position
1.
Service Manual - Page 17
To initialize the LCD television, press [DISPLAY] button on the upper right of the screen.
6-1
A7144INT Confirm "FF" indication on the remote control unit.
3. To enter the service mode, press [MENU] and [POWER] buttons on the TV unit simultaneously in the standby mode.
2. HOW TO INITIALIZE THE LCD TELEVISION
1.
Service Manual - Page 18
...is not output.
7-3
10 DTV-ON+5V is not output.
7-3
11 AL+3.3V(D) is not output.
7-4
12 PANEL+3.3V is not output.
7-4
13 AL+1.2V(D) is not output.
7-4
14 AL+3.3V(A) is not output.
7-5
15... not output.
7-5
17 P-ON+9V is not output.
7-5
18 DTV-ON+1.8V is not output.
7-6
19 PANEL-6V is not output.
7-6
20 The key operation is not functioning.
7-6
21 No operation is possible from the...
Service Manual - Page 21
... output.
Is approximately 6.8V voltage supplied to the cathode of D903? Is approximately 6.8V voltage supplied to the collector of IC901? FLOW CHART NO.12 PANEL+3.3V is not output.
No See FLOW CHART No.10
No See FLOW CHART No.11
No
Check Q919 and P-ON-H line, and
service it...
Service Manual - Page 23
... approximately 3.3V voltage supplied to the
No
anode of the key No switches (SW1101,SW1102,SW1103,SW1104, SW1105,SW1107,SW1111) normal?
FLOW CHART NO.19 PANEL-6V is not output. FLOW CHART NO.20 The key operation is any leak or short-circuit on the loaded circuit and service it if...
Service Manual - Page 28
IC1202 (TV MICRO CONTROLLER) KEY-IN-2 4 KEY-IN-1 3 REMOTE 27
RESET 94
XIN 37 XOUT 38
Q917 RESET
AL+3.3V(D)
X1301 27MHz
VCOM 19
DTV-ON-H 152 ...
Service Manual - Page 33
... SW-6V
Q910 SW+3.3V
VGH-H
TO SYSTEM CONTROL BLOCK DIAGRAM
+35V
VT+33V
Q919 SWITCHING
DTV-ON-H P-ON-H
TO SYSTEM CONTROL BLOCK DIAGRAM
CN1202 2 PANEL+25V 3 PANEL+25V 5 PANEL+3.3V 6 PANEL+3.3V 8 PANEL+10.8V 10 PANEL-6V
TO LCD MODULE
A7144BLP
Service Manual - Page 36
... THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES:
1. ABCD
6. The correct part number is used in the power supply circuit are as shown below: Plug the TV power cord into a standard AC outlet.:
Voltage
1 2 5.0
3 5.0
Power on mode
Indicates that line number "1" goes to 3 digits)
3
1-B1
AREA D3
Examples:
2
AREA B1...
Service Manual - Page 50
... LIGHT BACK LIGHT BACK LIGHT
LCD MODULE
CN401 1 2
CN402 1 2
CN403 1 2
GND PANEL+25V PANEL+25V
GND PANEL+3.3V PANEL+3.3V
GND PANEL+10.8V
GND PANEL-6V
GND EB [5] EB [4] EB [3] EB [2] EB [1] EB [0]
GND EG [5] EG... 21 22 23 24 25 26 27 28 29 30 31 32 33
Comparison Chart of Models and Marks
Model
Mark
LC-20AV7U
A
LC-20SH7U B
CN61
CN101
1 D-GND
1
2 DTV-SPDIF 2
3 DTV-ON+5V 3
4 TU-SCL
4
5...
Service Manual - Page 51
... Address 1 Input
3 A2
Slave Address 2 Input
4 GND
GND
5 SDA
Serial Data
6 SCL
Serial Clock
7 WP
Write Protect
8 VCC
VCC
IC1202 (LCD Drive / LCD Signal Process / TV Micro Controller)
Pin No.
IC PIN FUNCTION DESCRIPTIONS
IC31 (IF Signal Process)
Pin No.
Service Manual - Page 52
... ER[1]
Pixel Data Output (ER)
117 ER[0]
Pixel Data Output (ER)
118 VSS
GND
119 VSS
GND
120 VSS
GND
121 VSS
GND
122 LPF
Panel Clock PLL Filter
123 RSPI
Reference Terminal
124 NU
Not Used
125 CLKL
Clock Signal Output
126 OB[5]
Pixel Data Output (OB)
12-2
A7144PIN
Service Manual - Page 53
...
152 DTV-ON-H
DTV On Signal at High
153 DTV-S-RESET DTV Reset
154 NU
Not Used
155 DTV-S-SCLK DTV Serial Clock
156 Clear
Panel Control Signal
157
BACKLIGHTSW
Inverter Control Signal Output
158 BOOT-SEL Boot Select
159 VSS
GND
160 VSS
GND
IC601 (Error Voltage Det)
Pin No...
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