Sharp LC-46XD1E/RU, LC-52XD1E/RU Service Manual

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LC-46/52XD1E-RU
SERVICE MANUAL
No. S76V5LC46XD1E
LCD COLOUR TELEVISION
MODELS
CONTENTS
[1] IMPORTANT SERVICE SAFETY PRE-
CAUTION ....................................................... 1-1
[2] Precautions for using lead-free solder ........... 1-2
CHAPTER 2. SPECIFICATIONS
[1] SPECIFICATIONS ......................................... 2-1
CHAPTER 3. OPERATION MANUAL
[1] OPERATION MANUAL .................................. 3-1
CHAPTER 4. REMOVING OF MAJOR PARTS
[1] REMOVING OF MAJOR PARTS ................... 4-1
CHAPTER 5. ADJUSTMENT PROCEDURE
[1] ADJUSTMENT PROCEDURE....................... 5-1
CHAPTER 6. TROUBLE SHOOTING TABLE
[1] TROUBLE SHOOTING TABLE...................... 6-1
LC-46XD1E/RU
LC-52XD1E/RU
CHAPTER 8. OVERALL WIRING/BLOCK DIAGRAM
[1] OVERALL WIRING DIAGRAM......................8-
[2] SYSTEM BLOCK DIAGRAM.........................8-
[3] POWER BLOCK DIAGRAM ........................
CHAPTER 9. PRINTED WIRING BOARD
[1] MAIN Unit ......................................................9-1
[2] POWER Unit..................................................9-5
[3] AV Unit...........................................................9-9
[4] KEY Unit ......................................................9-15
[5] R/C, LED Unit ..............................................9-16
[6] DIGITAL TUNER Unit..................................9-17
[7] DIGITAL Unit ...............................................9-19
CHAPTER 10. SCHEMATIC DIAGRAM
[1] SCHEMATIC DIAGRAM..............................10-1
Parts Guide
1 5
.. 8-9
CHAPTER 7. MAJOR IC INFORMATIONS
[1] FUNCTIONS OF MAJOR ICs (VIDEO
PROCESSOR)............................................... 7-1
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.
This document has been published to be used for after sales service only. The contents are subject to change without notice.
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LC-46/52XD1E-RU
Service Manual
CHAPTER 1. IMPORTANT SERVICE SAFETY PRECAUTION
[1] IMPORTANT SERVICE SAFETY PRECAUTION
1. WARNING
1. For continued safety, no modification of any circuit should be attempted.
2. Disconnect AC power before servicing.
2. BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)
Before returning the receiver to the user, perform the following safety checks:
1. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.
3. To be sure that no shock hazard exists, check for leakage current in the following manner.
• Plug the AC cord directly into a 220 - 240 volt AC outlet. (Do not use an isolation transformer for this test).
• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15μF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.
• A true RMS reading multimeter should be used for this test, especially where the equipment uses a switch mode power supply which may result in very non-sinusoidal leakage current.
• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the pur­pose of completing these checks.) Any reading of 1.75 Vrms (this corresponds to 0.7 mA. peak AC.) or more is excessive and indicates a potential shock hazard which must be cor­rected before returning the monitor to the owner.
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
SAFETY NOTICE
Many electrical and mechanical parts in LCD color television have special safety-related characteristics. These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, watt­age, etc. Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features
are identified by " " . For continued protection, replacement parts must be identical to those used in the original circuit. The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the
servicing guidelines which follow:
CAUTION: FO R C O N T I N U E D PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME TYPE F701 (4A / 250V)
DVM
AC SCALE
1.5k ohm 10W
TO EXPOSED METAL PARTS
CONNECT TO KNOWN EARTH GROUND
0.15μF
TEST PROBE
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[2] Precautions for using lead-free solder
1. Employing lead-free solder
• ALL "PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
• For the Inverter PWB Units the type used in nickel, so they are marked as LFn:.
2. Using lead-free wire solder
• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause dam­age or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.
3. Soldering
• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it. When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
• Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Part No, Description Code
ZHNDAi123250E J φ0.3mm 250g(1roll) BL ZHNDAi126500E J φ0.6mm 500g(1roll) BK ZHNDAi12801KE J φ1.0mm 1kg(1roll) BM
L Fa
Indicates lead-free solder of tin, silver and copper.
L F
Indicates lead-free solder of tin, silver and nickel.
n
Sn-Ag-Ni
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LC-46/52XD1E-RU
Service Manual
CHAPTER 2. SPECIFICATIONS
[1] SPECIFICATIONS
As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations from these values in individual units.
NOTE
Refer to inside back cover for dimensional drawings.
Item
46
"
LCD COLOUR TV,
Model: LC-46XD1E
Video Colour System
PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60
TV Function
CCIR (B/G, I, D/K, L, L')
TV­Standard
LCD panel
46" Advanced Super View & BLACK TFT LCD
Number of dots
6,220,800 dots (1920g1080g3 dots)
VHF/UHF
E2-E69ch, F2-F10ch, I21-I69ch, IR A-IR Jch, (Digital: E5-E69ch)
CATV
Hyper-band, S1-S41ch
TV-Tuning System
Auto Preset 999 ch, Auto Label, Auto Sort
STEREO/BILINGUAL
NICAM/A2
Receiving Channel
Brightness
450 cd/m
2
Backlight life
60,000 hours (at Backlight Standard position)
Viewing angles
H : 176° V : 176°
Audio amplifier
15W x 2
Speaker
(100 mm
x 40 mm) x 4
9 pin MINI-DIN male connector
EXT 2
EXT 3
S-VIDEO (Y/C input), RCA pin (AV input)
RS-232C
UHF/VHF 75 Din type (Analogue & Digital)
SCART (AV input/monitor output, Y/C input, AV Link)
Antenna input
EXT 5
HDMI, Ø 3.5 mm jack (Audio input)
EXT 1
SCART (AV input, Y/C input, RGB input, TV output)
EXT 4
Ø 3.5 mm jack (Audio input), 15 pin mini D-sub (PC/Component)
Digital
DVB-T (2K/8K OFDM)
Analogue
OSD language
English/German/French/Italian/Spanish/Dutch/Swedish/Portuguese/Finnish/ Turkish/Greek/Russian/Polish
Power Requirement
AC 220-240 V, 50 Hz
Power Consumption
260 W (2.7 W Standby) (Method IEC60107)
Weight
31.5 kg (Without stand), 36.0 kg (With stand)
OUTPUT
RCA pin (Audio)
Headphones
Ø 3.5mm jack (Audio output)
C. I. (Common Interface)
EN50221, R206001
Operating temperature
0°C to+40°C
EXT 6
HDMI
Terminals
Rear
52"
LCD COLOUR TV,
Model: LC-52XD1E
52" Advanced Super View & BLACK TFT LCD
280 W (2.7 W Standby) (Method IEC60107)
36.0 kg (Without stand), 40.0 kg (With stand)
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Service Manual
CHAPTER 3. OPERATION MANUAL
[1] OPERATION MANUAL
TV (Front view)
Quick guide
TV (Rear view)
NOTE
Only if you use an active terrestrial antenna, select "yes (5V)" under "Supply voltage". (Page 16)
AC INPUT terminal
OPC sensor
Remote control
sensor
(Standby/On)
indicator
OPC indicator
(Power button)
MENU button
(/ )
(Volume buttons)
P (/)
(Programme [channel] buttons)
SLEEP indicator
EXT 2 (AV) terminal
EXT 3 terminals
Headphone jack
EXT 1 (RGB) terminal
EXT 5 (HDMI/AUDIO) terminals
Antenna input terminal (DVB-T 5V=/80 mA)
OUTPUT (Audio) terminals
EXT 4 terminals
RS-232C terminal
COMMON INTERFACE slot
EXT 6 (HDMI) terminal
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Quick guide
CAUTION
Improper use of batteries can result in chemical leakage or explosion. Be sure to follow the instructions below.
Do not mix batteries of different types. Different types of batteries have different characteristics. Do not mix old and new batteries. Mixing old and new batteries can shorten the life of new batteries or cause chemical leakage in old batteries. Remove batteries as soon as they have worn out. Chemicals that leak from batteries can cause a rash. If you find any chemical leakage, wipe thoroughly with a cloth. The batteries supplied with this product may have a shorter life expectancy due to storage conditions. If you will not be using the remote control unit for an extended period of time, remove the batteries from it.
30°
30°
Remote control sensor
5m
Press and slide the battery cover to open it.
Insert two supplied "AAA" size batteries.
Place batteries with their terminals corresponding to the ( + ) and ( - ) indications in the battery compartment.
Close the battery cover.
1 2
3
Inserting the batteries
Before using the TV for the “rst time, insert two "AAA" size batteries (supplied). When the batteries become depleted and the remote control unit fails to operate, replace the batteries with new "AAA" size batteries.
Using the remote control unit
Use the remote control unit by pointing it towards the remote control sensor. Objects between the remote control unit and sensor may prevent proper operation.
Cautions regarding the remote control unit
Do not expose the remote control unit to shock. In addition, do not expose the remote control unit to liquids, and do not place in an area with high humidity. Do not install or place the remote control unit under direct sunlight. The heat may cause deformation of the unit. The remote control unit may not work properly if the remote control sensor of the TV is under direct sunlight or strong lighting. In such case, change the angle of the lighting or TV, or operate the remote control unit closer to the remote control sensor.
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Remote control unit
Quick guide
12 3 4
7
9
14
12
8
5 6
11
17
16
13
18
19
29 30
31
25
24
15
27
10
21
23
22
26
20
28
1 (Standby/On)
2 (Teletext)
TV: Display the analogue teletext. DTV: Select DTV data broadcasting
and TELETEXT.
3 (Reveal hidden Teletext)
4 (Subtitle for Teletext)
TV/External: Subtitle on/off. DTV: Display the subtitle selection
screen.
5 (Freeze/Hold)
6 (Subpage)
7
… Set the channel in TV and DTV mode. Enter the desired numbers or letters. Set the page in Teletext mode.
8 (Flashback)
Press to return to the previous image in normal viewing mode.
9DTV
Press to access DTV mode while watching other input sources, and vice versa.
(Will not work if you were watching DTV immediately before turning off the TV. In this case “rst select any other input source except DTV using the button.)
10 (Sound mode)
Select the sound multiplex mode. (See below.)
11 (Mute)
Sound on/off
12 (+/-) (Volume)
Increase/decrease volume.
13 LIST
DTV: Display the programme list.
14 DTV MENU
DTV: Display DTV Menu screen.
15 END
Exit the menu screen.
16 truD
Demonstrate the truD effects in a dual screen format.
17 SLEEP
Set the sleep timer on (in units of 30 min. up to max. 2hr. 30min) and off.
18 (Top/Bottom/Full)
Set the area of magnification in analogue teletext mode.
19 (INPUT SOURCE)
Select an input source. (TV, DTV, EXT1, EXT2, EXT3, EXT4,
EXT5, EXT6)
20 EPG
DTV: To display EPG (Electronic Programme Guide) screen.
ESG
DTV: To display ESG (Electronic Service Guide) screen.
RADIO
DTV: Switch between RADIO and DTV mode.
21 AV MODE
Select a video setting.
22 SURROUND
Surround effects on/off.
23 P ( / )
Select the channel. In analogue TV mode, external input
sources (EXT 1 - 6) can also be selected.
24 (Display information)
25 MENU
MENU screen on/off.
26 / / / (Cursor)
Select a desired item on the setting screen.
OK
Execute a command within the menu screen.
Display the station list in analogue mode and the programme list in DTV mode.
27 RETURN
Return to the previous menu screen.
28 Colour (Red/Green/Yellow/Blue)
TELETEXT: Select a page. The coloured buttons are used to
select correspondingly to the coloured items in the menu screen.
29 OPC
To switch the Optical Picture Control on and off.
30 (Wide modes)
Select the wide mode.
31 ACTION (Action mode)
Action mode on/off.
NOTE
When no signal is input, the sound mode will display "Mono".
NICAM TV broadcasts selection A2 TV broadcasts selection
Using on the remote control unit
DTV mode:
Press to open the multi audio screen. Analogue TV mode: Each time you press , the mode switches as illustrated in the following tables.
Selectable items
Stereo, Mono!
Dual-channel Sound 1, Dual-channel Sound 2, Dual­channel Sound 1+2, Mono!
NICAM, Mono!
Signal
Stereo
Bilingual
Monaural
Selectable items
Stereo, Mono!
Dual-channel Sound 1, Dual-channel Sound 2, Dual-channel Sound 1+2
Mono
Signal
Stereo
Bilingual
Monaural
"Mono!" indicates that you have manually changed to FM mono.
LC-46/52XD1E-RU
LC-46/52XD1E-RU
CHAPTER 4. REMOVING OF MAJOR PARTS
Service Manual
[1] REMOVING OF MAJOR PARTS
1. Remove the Rear Cabinet fixing screws (4 pcs.).
2. LC-46XD1E/RU: Remove the Rear Cabinet fixing screws (4 pcs.). LC-52XD1E/RU: Remove the Rear Cabinet fixing screws (4 pcs.).
3. LC-46XD1E/RU: Remove the Rear Cabinet fixing screws (13 pcs.). LC-52XD1E/RU: Remove the Rear Cabinet fixing screws (18 pcs.).
LC-46XD1E/RU
3
2
1
LC-52XD1E/RU
Rear Cabinet
3
2
1
Rear Cabinet
4 – 1
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4 – 2
4. Remove the Bottom Cover-Rear fixing screws (4 pcs.).
5. Remove Stand Ass’y from the Front Cabinet.
6. Remove the Bottom Cover-Front from the Front Cabinet.
7. Remove the Earth Angle fixing screw (1 pc.).
8. Remove the Earth Angle fixing screw (2 pcs.).
9. Remove the Stand Angle and Center Angle Ass’y fixing screws (12 pcs.).
10.Disconnect Speaker Wiresand “KM” Wire.
11.Remove the speaker fixing screws (4 pcs.) and detach the Speaker Boxies L/R.
12.Detach the Top Cover Ass’y.
13.Disconnect all the connectors fron all the PWBs.
4
5
6
Bottom Cover-Rear
Bottom Cover-Rear
Bottom Cover-Front
Bottom Cover-Front
Speaker Box-R Speaker Box-L
KM
SP SP
Stand Angle
Stand Angle
Earth Angle
Top Cover Ass'y
Cebter Angle Ass'y
Front Cabinet
Stand Ass'y
9
11
11
10
10 10
7
8
12
9
PL13LV
LB
LA
LA
13
13
11
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14.LC-46XD1E/RU: Remove the Chassis Tray fixing screws (5 pcs.). LC-52XD1E/RU: Remove the Chassis Tray fixing screws (4 pcs.).
15.Remove the Full Shield fixing screws (1 pc.).
16.Remove the Full Shield fixing screws (5 pcs.).
17.Disconnect all the connectors from all the PWBs.
18.Remove the Tuner PWB fixing screws (2 pcs.).
19.Remove the Terminal Angle fixing screws (2 pcs.).
20.Remove the Main PWB Shield and Main PWB fixing screws (4 pcs.).
21.Remove the Digital PWB and Digital PWB Shield fixing screws (4 pcs.).
22.Remove the Power PWB fixing screws (4 pcs.).
23.Remove the AV PWB fixing screws (2 pcs.).
14
14
14
19
16
15
20
21
22
18
23
AV PWB
Main PWB
Tuner PWB
Digital PWB
Digital PWB Shield
Full Shield
Terminal Angle
Power PWB
Chassis Frame
SP
LV
17
RA
17
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24.Remove the LCD Angle Side fixing screws (4 pcs.).
25.Remove the LCD Angle Side fixing screws (8 pcs.).
26.Remove the R/C LED PWB fixing screws (2 pcs.).
Front Cabinet
LCD Angle Side
R/C LED Unit
24
25
26
25
25
25
25
24
24
25
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LC-46/52XD1E-RU
Service Manual
CHAPTER 5. ADJUSTMENT PROCEDURE
[1] ADJUSTMENT PROCEDURE
The adjustment values are set to their optimum at the factory before shipping . If by any chance a value should become improper or a readjustment is required due to part replacement, make an adjustment according to the fol-
lowing procedure.
1. After replacement of any PWB and/or IC for repair, note the following.
When replacing the following units, be sure to prepare the new units loaded with updated software. MAIN-UNIT: DUNTKD915FM01 (LC-52XD1E/K/F/I/RU) : DUNTKD915FM01 (LC-46XD1E/K/F/I/RU) NOTE: That an IC into which ROM data is written is available for MAIN-UNIT servicing (see below). IC1901 VHi24LC2BiNQES EDID(HDMI) IC1902 VHi24LC2BiNRES EDID(HDMI) IC2303 RH-iXB731WJZZS EDID(PC)
2. Software Upgrade
Main software update procedure of SHARP LCDTV
1. Connect your PC and LCDTV by 232C-CROSS-CABLE.
Set up starter298
2. Decompress starter_298_ver100.zip.
3. Double click on starter.exe and running.
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4. Set the parameters of the starter software as below. i) [Options]-[Preferences] Setup window will be opened.
1) "General","Terminal","System update": no need to modify anything.
2) "Connection": set COM port number and configuration on your PC.
3) "Download": set configuration as below.
5. [File]-[Save as] you can save above settings as file name as you want.
Setting "9600"
(a) set directory path of starter tool
(b) set absolute path of target elf file
(c) set simple or packed
(d) set absolute path of "Cbus_boot_ver1.00.txt" for Cbus(boot).
¨Starter_298\Configs\Cbus_boot_ver1.00.txt
Starter_298\Configs\Cbus_flash_NoUART_ ver1.00.txt
(e) set absolute path of "Cbus_flash_NoUART_
ver1.00.txt" for Cbus(flash).
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Download
6. Connect to the LCD TV and start up "starter298" software.
7. After turn on the power of set, please push the below connect but­ton.
NOTE: If set power was turned off and on with this condition, strange
character will be appear, so if this strange character appear, please ignore.
8.
9.
in capital letters
in capital letters
Input "USEROFF" command (non-visited) and return key on your ˴˴˴˴˴˴˴˴˴˴PC. (get "OK"message)
Input "DPON" command and return key on your PC. (get "MSH>" message)
in small letters
Input "fpga 3 0x80" command and return key on your PC, and the
LCD TV is turned off automatically.
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10.Change the port settings. 11.Connect to the LCD TV by activating the connection button.
12.[Programming]-[Download] Download window will be opened.
setting "115200"
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13.Select the file which you want to upload. 14.Click "Flash" button and get executed.
click once
click once
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15.If the Flash has burned successfully, "OK" message is shown as below.
16.Turn the AC power off , and turn AC power on. Return to default automatically.
17.Finish!!
18.Prepare for next model If you have once write the software to the set, the PC side commu-
nication speed will be set up to "115200". So before you connect the PC to the next set, please change back
this speed to "9600". (Please refer 4-(i)-2)
19.Software writing time It takes about 15 minutes to write the all software with above
method. Please keep the cable connection during the PC and Set having a
communication.
3. Entering and exiting the adjustment process mode
1
Press the "POWER"ke
y
on the set of runningTV set to force off thepower.
2
While holdin
g
down the “VOL(-)”and”MENU”keys on the set at once, Press the "POWER"keyon the se
t
to turn on the power. The letter appears on the screen.
3
Next, hold down the “VOL
(-)
”and㵘”P
(
)
”keys on the set at once.
Multi
p
le lines of orange characters appearingon the screen indicate that the set is now in the adjustment Process mode. If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.
4 To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off
the power. (When the power is turned off with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
5 To remove "K" mode, just repeat step1 and 2. This time the letter "K" disappears from screen.
Caution: Use due care in handling the information described here lest the users should
know how to enter the adjustment process mode. If the settings are tampered with in this mode, unrecoverable system damage may result.
K
LC-46/52XD1E-RU
䋨䋱䋩
ging
)
g
gapag
ging
)
(
)
p
y
[
n
4. Remote controller key operation and description of display in adjustment process mode.
keyoperation
Remote controller key Function P䋨㺢/㺣䋩 Chan VOL䋨䋫/䋭䋩 TurningapagePREVIOUS/NEXT CursorUP/DOWN Movin CursorLEFT/RIGHT Turnin
INPUT SOURCE Input source switching (toggle switching) on remote controller RETURN Returning to a present page OK Executing a function
*Input mode is switched automatically when relevant adjustment is started so far as the necessary
input signal is available.
Main unit key
P䋨㺢/㺣䋩
VOL䋨䋫/䋭䋩
MENU
a selected line setting(䋫10/䋭10
an itemlinebyone䋨UP/DOWN䋩
ePREVIOUS/NEXT
Chan
a selected item setting(䋫1/䋭1 Direct control on TV set (Input/Wide Mode/Bright/Contrast)
TVEXT1EXT2EXT3EXT4
Descri
tion of displa
(1)Current page title
[INIT]
PAL+TUNERMAIN][COMP] [SCART RGB] [TUNER]
Main Version Dev Version Dev Loader Versio Center Acutime Backlight Acutime Temp Sensor
Normal Standby Cause Error Standby Cause [1]
(3) Current page item
[5]
46, 52XD1 1.15(XX/XX/XXX)
XX XX XX XX XX XX XX
(2) Parameters
5 – 7
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5. Adjustment process mode menu
The character string in brackets [ ] will appear as a page title in the adjustment process menu header.
Page Line
1/13 [INFO]
1 Main Version
46/52XD1 ver1.15 2006.0915
Main microprocessor version 2 Dev Version ver1.10 DTV version. 3 Dev Loader Version 2.7 DTV Loader Version 4 Center Acutime xxxxH xxM Main operating hours 5 Backlight Acutime xxxxH xxM Backlight operating hours 6 Temp Sensor 080
Temp Sensor setting
7 Normal Standby Cause 1 RC_STANDBY 8 Error Standby Cause [1]
1c POWER ERROR 0000H 00M
Error standby cause Total operating time before error
[2]
1c POWER ERROR 0000H 00M
[3]
1c POWER ERROR 0000H 00M
[4]
0 0000H 00M
[5]
0 0000H 00M
2/13 [INIT]
1 FACTORY INIT
EURO/UK/ITALY/FRANCE/RUSSIA
Initialization to factory settings execution 2 INCH SETTING 46/52 Inch Setting 3 PUBLIC MODE off/on HOTEL MODE㵘flag setting 4 Center Acutime Reset off/on Main operating hours Reset 5 Backlight Acutime Reset off/on Backlight operating hours Reset 6 Picture Read Pos X 670 x-axis setting of picture data 7 Picture Read Pos Y 419 y-axis setting of picture data 8 Picture Read Signal Type PAL/COMP/HDMI/RGB Signal Type Setting 9 Picture Read 0 - 1023 Start/stop of picture data
3/13 [PAL+TUNERMAIN]
1 RF-AGC BG ADJ ENTER RF-AGC BG adjustment execution 2 RF-AGC L ADJ ENTER RF-AGC L adjustment execution 3 PAL+TUNER ADJ ENTER PAL TUNER auto adjustment execution 4PAL㵘ADJ ENTER PAL auto adjustment execution 5 TUNER ADJ ENTER TUNER auto adjustment execution 6PAL㵘DAC 29 PAL DAC adjustment 7 TUNER A DAC 29 Tuner DAC adjustment 8 Tuner AGC BG 5 Tuner AGC BG adjustment 9 Tuner AGC L 8 Tuner AGC L adjustment
10 Tuner AGC int. off 6 Tuner AGC gain adjustment
4/13 [COMP ]
1 COMP ALL ADJ
ENTER
COMP15K auto adjustment execution 2 COMP CONTRAST 32 COMP contrast adjustment execution 3 COMP Cb GAIN 32 COMP Cb gain adjustment execution 4 COMP Cr GAIN 32 COMP Cr gain adjustment execution 5 COMP BRIGHT 0 COMP bright adjustment execution
5/13 [SCART RGB]
1 SCART RGB CONTRAST 40 SCART RGB contrast adjustment execution 2 SCART RGB Cb GAIN 40 SCART RGB Cb gain adjustment execution 3 SCART RGB Cr GAIN 40 SCART RGB Cr gain adjustment execution 4 SCART RGB BRIGHT 0 SCART RGB bright adjustment execution
6/13 [TUNER]
1 TUNER TEST
7/13 [M GAMMA INFO]
1 M GAMMA POS 1
4
W/B adjustment, gradation 1 input setting 2 M GAMMA POS 2
9
W/B adjustment, gradation 2 input setting 3 M GAMMA POS 3
14
W/B adjustment, gradation 3 input setting 4 M GAMMA POS 4
20
W/B adjustment, gradation 4 input setting 5 M GAMMA POS 5
25
W/B adjustment, gradation 5 input setting 6 M GAMMA POS 6
29
W/B adjustment, gradation 6 input setting 7 M GAMMA WRITE off/on EEP writing of adjustment values 8 M GAMMA RESET off/on Initialization of adjustment values
Item
Remarks (adjustment detail,etc.)
Description
LC-46/52XD1E-RU
5 – 9
8/13 [M GAMMA 1-3]
1 M GAMMA R 1 107 W/B adjustment, gradation 1R adjustment value 2 M GAMMA G 1 107 W/B adjustment, gradation 1G adjustment value 3 M GAMMA B 1 107 W/B adjustment, gradation 1B adjustment value 4 275 W/B adjustment, gradation 2R adjustment value 5 275 W/B adjustment, gradation 2G adjustment value 6 275 W/B adjustment, gradation 2B adjustment value 7 446 W/B adjustment, gradation 3R adjustment value 8 446 W/B adjustment, gradation 3G adjustment value 9 446 W/B adjustment, gradation 3B adjustment value
10 off/on EEP writing of adjustment values
9/13 [M GAMMA 4-6]
1 M GAMMA R 4 660 W/B adjustment, gradation 4R adjustment value 2 M GAMMA G 4 660 W/B adjustment, gradation 4G adjustmnet value 3 M GAMMA B 4 660 W/B adjustment, gradation 4B adjustment value 4 835 W/B adjustment, gradation 5R adjustment value 5 835 W/B adjustment, gradation 5G adjustmnet value 6 835 W/B adjustment, gradation 5B adjustment value 7 960 W/B adjustment, gradation 6R adjustment value 8 960 W/B adjustment, gradation 6G adjustment value 9 960 W/B adjustment, gradation 6B adjustment value
10 off/on EEP writing of adjustment values
10/13 [ETC]
1 EEP CLEAR off/on Clear of process㵘adjustment EEP value 2 EEP CLEAR B off/on Clear of process adjustment value㵘of B_mode. 3 STANDBYCAUSE RESET off/on Reset of STANDBY CAUSE 4 0/1 1*** 0䋺*** 5 OPTION 0 6 AUTO/EURO/UK Destination setting 7 0 LAMP ERR RESET Initialization of L_ERR 8 0/1 LAMP ERR Inhibit L_ERR detection. 9 DTV CLR off/on Clear of DTV unit.
10 off/on STOP of I2C DATA execution
11/13 [LCD]
1 OSC FREQ50 1279 INVERTER drive frequency setting 2 OSC FREQ60 1279 INVERTER drive frequency setting 3 PWM FREQ50 218 Frequency setting for INVERTER dimmer 4 PWM FREQ60 218 Frequency setting for INVERTER dimmer 5 VCOM ADJ 64 COMMON VIAS adjustment setting 6 QS off/on on/off of Quick Shoot Function 7 CSI off/on on/off of Change Shear Impulse
12/13 [LCD TESTPATTERN]
1 PATTERN 0 Display LCD test pattern.
13/13 Service B
1 [HDTV] 0-10 Contrast,Bright and Color Adjustment of HDTV 2 [SERVICE B2] off/on on/off of Auto Sw Adjustment 3 [BASE GAMMA 1] 0-1023 Base Gamma Adjustment 1 4 [BASE GAMMA 2] 0-1023 Base Gamma Adjustment 2 5 [BASE GAMMA 3] 0-1023 Base Gamma Adjustment 3 6 [BASE GAMMA 4] 0-1023 Base Gamma Adjustment 4 7 [BASE GAMMA 5] 0-1023 Base Gamma Adjustment 5 8 [BASE GAMMA 6] 0-1023 Base Gamma Adjustment 6 9 [QUICK SHOOT] 0-255 QS Sreshuhorld Level Adjustment
MGAMMAR5 MGAMMAG5 MGAMMAB5 MGAMMAR6 MGAMMAG6 MGAMMAB6 M GAMMA WRITE
AUTO INSTALLATION SW
COUNTRY L ERR RESET L ERR STOP
I2C-OFF
MGAMMAG3 MGAMMAB3 M GAMMA WRITE
MGAMMAR2 MGAMMAG2 MGAMMAB2 MGAMMAR3
LC-46/52XD1E-RU
5 – 10
6. Special features
* ERROR STANDBY CAUSE (Page 1/13)
The total time when the unit enters the standby due to operational error and cause of error are recorded on EEPROM as much as possible. The values can be used to locate the fault for repair.
* EEP CLEAR (Page10/13)
Clear of process adjustment EEP value.
7. Inch Setting
8. Video signal adjustment procedure * The adjustment process mode menu is listed in Section 5.
1. Signal check Signal generator level adjustment check (Adjustment to the specified level)
• Composite signal PAL : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
• 15K component signal : Y level 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
(50 Hz) PB, PR level 0.7Vp-p ± 0.02Vp-p
2. Entering the adjustment process mode Enter the adjustment process mode according to Section 3.
3. RF AGC adjustment 1
1 Factory settings
Enter the ad
j
ustmentprocess mode.
Move the cursor to
[
INCH SETTING]onpage 2/13.
Use the R/C 㵘㵘ke
y
to select a inch size from
[
46/52]andpress the[OK]㵘key.
“EXECUTING” dis
playapp
ears .
After a while,"OK" display appears, the setting is completed.
Adjustment pointAdjustment Condition
s
Adjustment㵘procedure
ends by turning of
f
the MAIN POWER
1 Setting [Signal]
Feed the PAL S
p
rit Field colour bar signal(E-12ch)to TUNER.
PAL
Si
g
nal level: 65 dB V㵘±1dB 㵘㵘(75 LOAD
)
Sprit Field Colour Bar RF signal UV [E-12CH]
[Terminal] TUNER
100% white
2
Auto adjustment Adjustment process Bring the cursor on [ RF AGC BG ADJ] and press [OK] performance
[PAL+TUNERMAIN] menu
[RF AGC BG ADJ 㵘OK] appears when finished.
Adjustment Condition
s
Adjustment㵘procedure
Adjustment poin
t
LC-46/52XD1E-RU
5 – 11
4. PAL signal & tuner adjustment
5. ADC adjustment (Component 15K)
1 Setting [Signal]
Feed the PAL full field colour bar signal (75% colour saturation) to PAL EXT3 VIDEO IN. Full Field Color Bar Feed the RF signal (PAL colour bar) to TUNER. Composite or RF signal
Make surethe PAL colour bar pattern (E-12) has㩷the sync level of
7.3 with the picture level.
[Terminal] EXT3 VIDEO IN TUNER
100% white
2
Auto adjustment Adjustment process Bring the cursor on [PAL+TUNER ADJ] and press [OK]. performance [PAL+TUNERMAIN] menu [PAL+TUNER ADJ OK] appears when finished.
VIDEO IN SIGNAL
100% white
Adjustment point Adjustment conditions
E-12CH
Adjustment procedure
1 Setting [Signal]
Feed the COMPONENT 15K 100% full field colour bar signal (100%
COMP15K, 50Hz colour saturation) to EXT4 COMPONENT IN.
100% Full Field Colour Bar
[Terminal] EXT4 COMPONENT IN
2
Auto adjustment Adjustment process Bring the cursor on [COMP ALL ADJ] and press [OK]. performance [COMP] menu [COMP ALL ADJ OK] appears when finished.
100% white Black
Adjustment point Adjustment conditions Adjustment procedure
LC-46/52XD1E-RU
5 – 12
9. White Balance Adjustment
Adjustment gradation values (IN) appear on page 7/13 of process adjustment, and adjustment initial values(offset value) appear on pages 8/13 and 9/
13. For white balance adjustment, adjust the offset values on pages 8/13 and 9/13.
[Condition of the unit for inspection] Modulated light: MAX (+8)
[Adjustment reference device] Minolta CA-210
[Adjustment] Check that the values on page 7/13 of process adjustment are set as below. If not, change them accordingly.
1. Display the current adjustment status at point 6. (Page 8/13 of process adjustment) The display for checking the adjustment status is toggled by pressing the “6” button on the remote control. (Normal OSD display “6” display for check (OSD disappears) “6” normal OSD display . . . )
2. Read the value of the luminance meter. x=0.272 , y =0.277
3. Change MGAMMA R6/MGAMMA B6 (Adjustment offset value) on page 9/13 of process adjustment so that the values of the luminance meter approach x=0.272 and y =0.277.
(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R and B must be fixed.)
4. Display the adjustment status of the current point 5. (Each time the “5” button on the remote control is pressed, the adjustment status check dis­play is toggled.)
(Normal OSD display “5” Check display (OSD disappears) “5” Normal OSD display . . . )
Change M GAMMA R5/M GAMMA B5 (adjustment offset value) on page 9/13 of process adjustment so that the values of the luminance meter approach x = 0.272 and y = 0.277.
5. Repeat step 4) for points 4, 3, 2, and 1.
[Adjustment reference standard value] Adjustment spec ± 0.004 Inspection spec ± 0.006 (point 1) Adjustment spec ± 0.002 Inspection spec ± 0.004 (Excluding the above-mentioned)
MGAMMA POS 1 4 MGAMMA POS 2 9 MGAMMA POS 3 14 MGAMMA POS 4 20 MGAMMA POS 5 25 MGAMMA POS 6 29
LC-46/52XD1E-RU
5 – 13
10. Confirmation item
CSI Confirmation (Action Mode Section)
11. Initialization to factory settings
1 Setting Input a horizontal scroll signal of the vertical bar into the external input.
It moves at a constant speed.
white
2
Confirmation
Confirmed that brightness darkens when the action mode is turned on
with the action key to remote control and the afterimage decreases.
Confirmation item Confirmation method
Caution: When the factory settings have been made, all user setting data, including the channel settings, are
initialized. (The adjustments done in the adjustment process mode are not initialized.) Keep this in mind when initializing these settings.
1 Factory settings [Factory setting with adjustment process mode]
Enter the ad
j
ustmentprocess mode.
(See to below caution) Move the cursor to
[
FactoryInit]onpage 2/13.
Use the R/C 㵘㵘ke
y
to select a region from
[
EURO/UK/ITALY/FRANCE/RUSSIA]andpress the[OK]㵘key.
“EXECUTING” dis
playapp
ears .
After a while,"OK" dis
playapp
ears, the settingis completed.
[
Factorysettingwith R/C ke
y]
Enter the adjustmentprocess mode. 䊶 Push a remote controller code of each destination.
(
See below
)
It automaticallybecomes in theprocess adjustment menu(INIT
)
and change FACTORY INIT becomes "EXECUTING" display.
After a while, "OK" dis
playapp
ears, the settingis completed.
destination R/C code 46/52XD1K䊶䊶䊶A8
(
Hex
)
46/52XD1I䊶䊶䊶E8(Hex
)
46/52XD1F䊶䊶䊶E9(Hex
)
46/52XD1R䊶䊶䊶EB(Hex
)
46/52XD1E䊶䊶䊶FE(Hex
)
The following items are initialized in the factory setting.
1. User settings
2. Channel data (e.g. broadcast frequencies)
3. Maker option setting
4. Password data
After adjustments, exit the adjustment process mode. To exit the adjustment process mode, turn off the MAIN power key. When the power is turned off with the remoto control, unpulug the AC power cord and plug it back in.
ends by turning off the MAIN POWER key.
Adjustment item Adjustment conditions Adjustment procedure
LC-46/52XD1E-RU
5 – 14
12. Lamp error detection
1. Function This LCD color TV set incorporates a lamp error detection feature that automatically turns off the power for safety under abnormal lamp or lamp
circuit conditions. If by any chance anything is wrong with the lamp or lamp circuit or if the lamp error detection feature is activated for some rea­son, the following will result.
i) The power is interrupted in about 6 seconds after it is turned on.
(The power LED on the front of the TV set turns red from green and keeps blinking in red: ON for 250 ms and OFF for 1 sec).
ii) If the above phenomenon i) occurs 5 times consecutively, it becomes impossible to turn on the power. (The power LED remained red).
2. Measures i) Checking with lamp error detection OFF
Enter the adjustment process mode, referring to "3. Entering and exiting the adjustment process mode." If there is a problem with the lamp or lamp circuit, the lamp will go out. (The power LED is green.) Then, you can check the operation to see if the lamp and lamp circuit are in trouble.
ii) Resetting the lamp error count
After the lamp and lamp circuit are found out of trouble, reset the lamp error count. If a lamp error is detected five consecutive times, the power cannot be turned on. Using the cursor (UP/DOWN) key, move to the cursor to [L ERR RESET], Line 6 on adjustment process mode service page 10/13. With the cursor (LEFT/RIGHT) keys, select the [L ERR RESET] value. Finally press the cursor (OK) keys to reset the value to "0". Reset to "0 "
Table of contents of adjustment process mode Page 10/13
㵘㵘[ETC
]
㵘㵘EEP CLEAR
of
f
㵘㵘EEP CLEAR B
of
f
㵘㵘STANDBYCAUSE RESET
of
f
AUTO INSTALLATION SW 0
OPTION
0
㵘㵘COUNTRY
EURO
L ERR RESET
0
㵘㵘L ERR STOP
0
㵘㵘DTV CLR
of
f
㵘㵘I2C-OFF
of
f
㵘㵘㵘Resetting to "0"
LC-46/52XD1E-RU
5 – 15
13. Public Mode
1. How to enter Public mode Enter the ad
j
ustmentprocess mode, referringto "3.Enteringand exitingthe adjustmentprocess mode".
In the
[
INIT],page2/13 of service, turns on the PUBLIC MODE option.
Turn off TV b
yp
ressing"Power button" of TV unit.
Press "Power button" of TV unit and then
p
ress "V-" of RC and "V-" of TV at the same time duringthe switch-on action
(
before the screen is displayed
)
Note: Lan
guag
e: English onl
y
Options "Monitor", "Basic", Hotel", "Full" Default "Full"
Chart of available
p
arameters in each mode
Monitor Basic Hotel Full Power on fixed x - - ­Maximum volume
xxx
-
Volume fixed
x
---
Fixed volume level
x
---
In
p
ut mode start
xxx
-
In
p
ut fixed
x
---
Start-u
pp
reset
xxx
-
Reset
xxx
-
In
p
ossible to select each item of function bypress cursor UP/DOWN keys on remote control.
The settin
gp
osition of each item of function is made bypress cursor RIGHT/LEFT keys on remote control.
Press OK ke
y
on remote control for confirmation afteryou set all functions.
2.
Valid/Invalid function table
(
R/C)KEY_CODE MONITOR BASIC HOTEL MONITOR BASIC HOTEL
Power
㶎䋱
xx
㶎䋱
xx
TELETEXT - -
x
--
x
1-9,0 - -
x
--
x
FLASH_BAC
K
--
x
--
x
Input select 2
x
x㶎2x
x
DTV - -
x㶎2x
x
EPG,ESG - - - - - -
RADIO - - - 2
x
x
SOUND(MPX
)
--
xxx
x
mute - -
x
--
x
V+,V- 3
x
x㶎3x
x
P+,P- 2
x
x㶎2x
x
AV mode - -
x
--
x
Standard setting called
Surround
------
LIST -----
x
i+ - -
x
--
x
DTV menu - - - - - -
Menu ------
OK
(
Station/Program List
)
--
x
--
x
truD ------
SLEEP - -
x
--
x
Wide mode - -
x
--
x
OPC ------
(
TV unit)KEY_CODE MONITOR BASIC HOTEL MONITOR BASIC HOTEL
Menu
2
x
x㶎2x
x
To select input only
P+,P- 2
xxxxx
V+,V- 3
x
x㶎3x
x
㶎䋱:The keyis avallable in a case that "Power on fixed" is set to "no". 㶎䋲:The ke
y
is avallable in a case that "Input fixed" is set to "no".
㶎䋳:The ke
y
is avallable in a case that "Volume fixed" is set to "no".
Full mode : Normal o
p
eration, no restrictions
In ATV mode In DTV mode
LC-46/52XD1E-RU
5 – 16
3. Parameter settin
g
(1)
POWER ON FIXED
O
p
tions "yes", "no"
Default "no"
(2)
MAXIMUM VOLUME
O
p
tions 0 --- 63
Default 63
(3)
VOLUME FIXED
O
p
tions "yes", "no"
Default "no"
(4)
VOLUME FIXED LEVEL
O
p
tions 0 --- Maximum volume
Default 20
(5)
INPUT MODE START
O
p
tions "normal", "TV","DTV", "EXT1", "EXT2", "EXT3", "EXT4", "EXT5", "EXT6"
Default "normal"
(6)
INPUT MODE FIXED
O
p
tions "yes", "no"
Default "no"
(7)
START-UP PRESET
O
p
tions 0 --- maximumpreset channel
Default 0001
(8)
RESET
O
p
tions "execute", "no"
Default "no"
LC-46/52XD1E-RU
6 – 1
LC-46/52XD1E-RU
Service Manual
CHAPTER 6. TROUBLE SHOOTING TABLE
[1] TROUBLE SHOOTING TABLE
Power switched on but no power supplied.
Are the power cord and internal harnesses correctly con-
nected?
NO Reconnect the cables correctly and switch on the power again.
YES
Does F701 function? NO Replace F701 and switch on the power again. Does the fuse blow
out?
YES NO
YES
Is there a voltage of about 5V at the BUS5V output [between pins (20)(+) and (22)(-) of PA]?
YES
NO Replace R790, D742, IC702, R780 and R781.
NO Is the voltage at C790
higher than 8V?
YES Are there voltages of about 13V, 24V and 35V at the UR13V, S29V and UR35V outputs, respectively?
NO Check D708, Q727, Q726,
R830, R829, D762, D763, Q741, R824, R825, IC704, R826, R827 and R828.
Replace Q705, D715, IC701, R726 and R721.
YES
Is the relay activated clicking? NO Check Q706, Q741, D707, D729 and R776.
YES Is there a voltage of about 12V at UR12V [between pins (1)(+) and (3)(-) of PL]?
NO Check Q731, Q742, Q732, D767, D766, R843, R844 and C799.
YES Is there a voltage of about 380V at C726? NO Check Q705, D715, IC701, R726 and R721.
YES Is there a voltage of about 60V at the INV60V output [between pins (1)(+) and (3)(-) of LA]?
NO Check Z1, Q707, Q708, Q716 and L706.
YES Is there a voltage of about 10V at the INV10V output
[between pins (5)(+) and (3)(-) of LA]?
NO Check IC705, R832, R833, R834 and C813.
LC-46/52XD1E-RU
6 – 2
No sound (1) (during the reception of TV broadcasting)
No audio output during UHF/VHF reception
Checklist:
1) Is the volume set to MIN or MUTE on the remote control ? ... Set the desired volume.
2) Are headphones connected to HEADPHONE (J1301 ) ? ... Disconnect them.
3) Is ANT-CABLE disconnected or connected improperly ? ... Connect it correctly as per the operation manual.
Is the audio signal (L/R) sent from pins (28) and (27) of IC3701 (MSP)?
NO
Is the SIF signal (ANA_IN1+) sent to pin (67) of IC3701(MSP)?
YES Check whether +5V and
+8V are supplied to pins (12) and (39) of IC3701 respectively. Or,check peripheral circuits.
(AV-UNIT) YES NO Is the audio signal of pins (3) and (5) of IC303 (OP­AMP) sent properly?
NO Check SC2704
and P1201 or peripheral circuits. Is the S-MUTE sig­nal “L” ?
Is the audio signal (SIF) sent from pin (1) of CON­NECTOR (SC2705)?
YES Check pin (67) of IC3701
(MSP) and peripheral cir­cuits.
YES (TUNER) NO
Is the audio signal of pin (4) Of IC301/IC302 (AUDIO-AMP) sent prop­erly?
NO Check HEAD-
PHONE (J1301) or periph­eral circuits.
Is the audio signal (SIF) sent from Q210 (Buffer)?
YES Check CONNEC-
TOR(P201) and periph­eral circuits.
YES NO Is the audio signal output of pins (2) and (4) of P301 (AUDIO-CONNECTOR) normal ?
NO Check P301
(AUDIO- CON­NECTOR) and peripheral circuits.
Is the SIF signal sent to Q203 (AMP)?
YES Confirm whether +8V is
supplied to Q203. Or, please check the periph­eral circuit.
YES NO Check SP-BOX (right and left) and wire harness.
Is the SIF signal sent from pin (13) of TUNER (TU201)?
YES Check soldering the ter-
minal and peripheral circuits.
NO
Check whether 5V (ANT )
and 5V are supplied to pins (4) and (10) of TUNER (TU201) respec­tively. Check SDA/SCL and AGC signal.
YES Replace TUNER
(TU201).
LC-46/52XD1E-RU
6 – 3
No sound from external input devices (2) -1
No sound from an external input device connected to EXT1 (SCART1).
No sound from an external input device connected to EXT2 (SCART2).
No sound from an external input device connected to EXT3.
<EXT1> Is IN1-L audio signal sent from pin (6) of SCART1 terminal (J1101) to pin (53) of IC3701 (MSP)? Is IN1-R audio signal sent from pin (2) of SCART1 terminal (J1101) to pin (54) of IC3701 (MSP)?
YES
<EXT2> Is IN2-L audio signal sent from pin (27) of SCART2 ter­minal (J1101) to pin (56) of IC3701 (MSP)? Is IN2-R audio signal sent from pin (23) of SCART2 ter­minal (J1101) to pin (57) of IC3701 (MSP)?
YES
<EXT3> Is IN3-L audio signal sent from pin (3) of J1201 terminal to pin (47) of IC3701? Is IN3-R audio signal sent from pin (5) of J1201 terminal to pin (48) of IC3701?
NO NO NO
Check pins (6) and (2) of SCART1 and connection to an external input device.
Check pins (27) and (23) of SCART2 and connection to an external input device.
Check pins 3 (J1201) and 5 (J1201) of EXT3 and connec­tion to an external input device.
Is the audio signal properly sent from pins (28) and (27) of IC3701 ?
NO YES
Check IC3701 or peripheral circuits. Is the audio signal of pins (1)
and (7) of IC303 (OP-AMP) sent properly?
NO Check IC303 or peripheral circuits.
YES
Is the audio output signal of
pins (13) and (16) of IC302/ IC301(MAIN-AMP) normal?
NO Check IC302/IC301 (MAIN-AMP), HEAD-
PHONE and peripheral circuits.
YES
. Check CONNECTOR(P301),
SP-BOX(right and left).
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