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 violebell on May 19th, 2012
Set Up For Sharp Lc-20av7u Tv With Directv Box And Dvd Player.
Cannot locate a manual for this tv. Tv is connected to Directv box using RCA coaxial cable and DVD player is connected to TV using RCA cable.
TV says no signal. IF I channel up or down on the TV remote, it only gets Channel 14 (just a snowy screen), D02.01.
How do I get the TV to connect to the Directv channels?
Current Answers
Answer #1: Posted by freginold on May 21st, 2012 11:23 AM
freginold
Member since:
December 20th, 2011 Points: 23,253,885
Member since:
December 20th, 2011 Points: 23,253,885
Is the TV connected to the "out" port on the DirecTV box, with the cable leading to the satellite dish connected to the "in" port? Also, if the DVD player is hooked up, make sure the TV is in the correct input mode to receive input from the DirecTV box.
Related Sharp LC-20AV7U Manual Pages
Service Manual - Page 1
... sales service only. 1 The contents are subject to those specified be used .
MODELS LC-20AV7U/LC-20SH7U 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 parts...
Service Manual - Page 6
...cables as the Identification (location) No. No. Part
Remove/*Unhook/
Fig. P = Spring, L = Locking Tab, S = Screw, CN = Connector * = Unhook, Unlock, Release, Unplug, or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two Locking Tabs (L-2)
(5) Refer to the following "Reference Notes in order to gain access to item(s) to be serviced.
These numbers are also used... LC-20AV7U ...
Service Manual - Page 9
D3
4-4
A7144_45DC 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.
Service Manual - Page 13
D3
4-8
A7144_45DC 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.
Service Manual - Page 14
...to access next item. ELECTRICAL ADJUSTMENT INSTRUCTIONS
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Remote control unit 4. Set initial data as shown on the remote control) [MENU] → [3]
[MENU] → [4]
[MENU] → [5]
...Multi-Burst) 3. Initial Setting
General: Enter Service mode.
NOTE:
Electrical adjustments are required after [MENU] on the TV unit simultaneously in the ...
Service Manual - Page 15
... select "C/D1" mode.
5-2
A7144EA Press [VOL -] button on the TV unit.)
L = 3 cm
INPUT: WHITE 80%, 20% Color Analyzer
Note: Use the service remote control unit 1. Only when replacing the LCD Panel then adjust as shown above. Symptom of Misadjustment: White becomes bluish or reddish. Initial Setting."
7. White Balance Adjustment
Purpose: To mix red, green and...
Service Manual - Page 16
...-BRT
7. Point
Input
[MENU] button
Ant.
Then input above signal.
2. [RF/INPUT1] Press [MENU] button on the service remote control 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 Confirm "C" position was beginning to bright, no...
Service Manual - Page 17
HOW TO INITIALIZE THE LCD TELEVISION
1. To enter the service mode, press [MENU] and [POWER] buttons on the remote control unit.
3. To initialize the LCD television, press [DISPLAY] button on the TV unit simultaneously in the standby mode.
2. Confirm "FF" indication on the upper right of the screen.
6-1
A7144INT
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 BACKLIGHT-SW 157
P-ON...48 FSC 44
BUS-OPEN 29 DTV-S-SREQ 17 DTV-S-SCLK 155
DTV-S-SIN 16 DTV-S-SOUT 15 DTV-S-RESET 153
IC101 (DTV SIGNAL PROCESS)
DTV-S-RESET 204 DTV-S-SOUT 153 DTV-S-SIN 154 DTV-S-SCLK 155 DTV-S-SREQ 38
DTV MODULE CBA UNIT
CN101
CN61
12...
Service Manual - Page 37
...
1.7
CN1202
Pin No. Main 1/5 Schematic Diagram
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Comparison Chart of Models and Marks
Model
Mark
LC-20AV7U A
LC-20SH7U B
MAIN 1/5
Ref No. Position
ICS
IC1202
B-2
IC1205
E-2
TRANSISTORS
Q1001
B-1
Q1002
B-1
Q1003
C-1
Q1004
D-1
Q1005
D-1
Q1006
D-1
Q1007
E-1
CONNECTORS
CN1201
A-4
CN1202
F-4
CN1301
A-2
CN1302
A-1
CN1303...
Service Manual - Page 39
Position IC
IC801
N-2
TRANSISTORS
Q707
P-3
Q708
P-2
Q709
P-2
Q802
N-1
CONNECTORS
CN801
N-3
CN802
N-3
9-5
A7144SCM3 Main 3/5, Junction-A & Junction-B Schematic Diagram
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Comparison Chart of Models and Marks
Model
Mark
LC-20AV7U A LC-20SH7U B
MAIN 3/5
Ref No.
Service Manual - Page 43
IR Sensor Schematic Diagram
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Comparison Chart of Models and Marks
Model
Mark
LC-20AV7U A
LC-20SH7U B
9-9
A7144SCIR
Service Manual - Page 48
Comparison Chart of Models and Marks
Model
Mark
LC-20AV7U A
LC-20SH7U B
IR Sensor CBA Top View
IR Sensor CBA Bottom View
BA7120F01021-2
Junction-A CBA Top & Bottom View [A]
BA7120F01021-1
BA7120F01021-3
Junction-B CBA Top & Bottom View [A]
BA7120F01021-4 9-14 Function CBA Top View Function CBA Bottom View
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.
Service Manual - Page 50
...
AUDIO(L) -IN2
DIGITAL AUDIO-OUT
CL1104
1
2
IR SENSOR 3
CBA
4
5
AL+3.3V(D) GND REMOTE P-ON-H NU
CN1302 1 2 3 4 5
CN1201 1 ER [5] 2 ER [4] 3 ER ...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...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...
Service Manual - Page 53
... Data Output (OG)
149 STH
Start Pulse Signal
150 POL
Polarity Reverse Signal
151 LP
Latch Pulse Signal
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...
Service Manual - Page 55
... B9
B8
DTV Module
CBA Unit
L20
B7
L1
A10 L22 L1 L1
A6 S10
L20
AC601
L23 L23 L23
13-1
A24 A24
A7144_45CEX
Cabinet [ LC-20AV7U ]
S12
EXPLODED VIEWS
S11
A4
L2
L3
B15 A20
A1
B15 A22
B38
A3 A7
B15 Junction-B CBA
Function CBA
B1
L6
B38
B31 L6...
Service Manual - Page 57
X6
S2
X1
X4
X3
Packing Tape
X2
S13 S4
Tape
S3
FRONT S1
Shipping Label Packing Tape S10
FRONT
Packing Tape
13-3
A7144_45PEX Numbers are
not in sequence. Packing [ LC-20AV7U ]
Some Ref.
Service Manual - Page 74
...RCA JACK AV-4B-54H YELLOW RCA JACK WHITE AV-4B-58H WHITE RCA JACK AV-4A-57H RED RCA JACK AV-4B-55H RCA JACK AV-4B-56H RCA JACK AV-4B-57H RCA JACK WHITE AV-4B-58H WHITE RCA... 15PPM
FUNCTION CBA + IR SENSOR CBA + JUNCTION-A & B CBA [9HS1ESA14395] : LC-20AV7U
FUNCTION CBA + IR SENSOR CBA [9HS1ESA14399] : LC-20SH7U
Ref.
FH601 FH602 GP642# JK701 JK703 JK704 JK705 JK706 JK707 JK708 JK709 JK710 JK801...
Service Manual - Page 75
...CBA
Ref. A 9HSX1A7140-007
Description WIRE ASSEMBLY 2PIN SPEAKER 20V 2PIN/230MM
JUNCTION-B CBA : LC-20AV7U
Ref. MISCELLANEOUS CL802
Mark
Part No.
CAPACITOR C1142 DIODE D1142 TRANSISTOR Q1142 RESISTORS R1143 R1143 .../ 210MM WIRE ASSEMBLY 4PIN SW 20V 4PIN/128MM SENSOR REMOTE RECEIVER KSM-603SR2E
JUNCTION-A CBA : LC-20AV7U
Ref. Ref. No.
No. MISCELLANEOUS CL801
Mark
Part No.
Service Manual - Page 76
... means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of this publication may be reproduced, stored in a retrieval system, or transmitted in USA
SHARP ELECTRONICS CORPORATION Sharp Plaza, Mahwah, New Jersey 07430-2135
1 LC-20AV7U/LC-20SH7U
COPYRIGHT © 2007 BY SHARP CORPORATION
ALL RIGHTS RESERVED.
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