RCA 26LA33RQ LCD TV – How to enter service mode – Firmware upgrade - troubleshooting – Universal remote control set-up codes
Firmware upgrade
REC7 series main board has a USB SERVICE port, which is reserved for service use only. Please upgrade the firmware according to the instruction below.
Direct upgrading (do not need normal display)
STEP1: Get an empty USB disk with size not larger than 2GB, copy firmware file (CompBase.bin, or AlICompBase.bin) to the root directly of disk.
Note: the size of USB disk cannot be larger than 2GB, and before copying the firmware file, make sure the disk is empty. And the file must be placed in the root directory.
STEP 2: Turn off the TV, insert the USB disk into the SERVICE jack on the side panel of TV and then turn on the TV. After turned on, the TV's LED indicator will shine red and blue alternately. Wait for about one and half a minute to accomplish the upgrading.
Note: DO NOT power off or unplug the TV while upgrading.
Factory upgrading (need normal display)
STEP1: Get an empty USB disk with size not larger than 2GB, copy firmware file (AIICompBase.bin only) to the root directly of disk.
Note: the size of USB disk cannot be larger than 2GB, and before copying the firmware file, make sure the disk is empty. And the file must be placed in the root directory.
STEP 2: Turn on the TV, insert the USB disk into the SERVICE jack on the side panel of TV. Then press the remote control buttons “MENU" > "1147" to enter factory menu [Service mode]
STEP 3: Choose "USB UPDATE" and press OK. If there are "CompBase.bin" and "AlICompBase.bin" in the disk at the same time, be sure to select "AIICompBase.bin" to update. The upgrading phenomenon is the same to direct upgrading.
Note: DO NOT power off or unplug the TV while upgrading, otherwise the upgrading will fail, and the main board will be unable to upgrade any more.
Before opening the cabinet and working on the repairs, keep in mind that most of the problems caused by improper using or settings to the TV set. If all of it are found OK, carry out the easy troubleshooting before checking or replacing the main parts of the television. The troubleshooting guides given below base on the situation in which the TV's functions are set and used properly
TV cannot be turned on
Check the connection and condition of wires and inlets that relate to power board, including the AC power inlet, the power incoming wire, wires between power board and main board, etc.
Check the diagram around power board to see If there exists a short circuit or creepage.
The power board may be bad. Please change the board for testing. If it cannot help.,
In addition, the malfunction of LCD panel can cause failure of power on.
Auto turning off
Check the sleep timer setting.
Check the surrounding diagram of power board. The problem is most possibly caused by short circuit or wire breakage, because this kind of malfunctions can cause excessive current, which will make the power board startup self-protection.
The screen goes black after a shorting blink
If the TV screen can not display after the blink, that means the panel or other parts of equipment is broken (most likely by improper input voltage). Ensure the input voltage of every component, and then check the part that is suspected damaged.
If this problem occurs repeatedly, check the surrounding diagram and connections of panel inverter board. Also, the black-light unit and LCD lamps should be checked out.
There exist afterimages after power off
If the panel can work normally at the other time, it may be caused by bad main board. Upgrade to the latest software first, if that does not work, attempt to change the main board.
There exists squeak when TV is working
Listen to the squeak carefully to make sure where the noise comes from. If it is from speakers, the voice may be caused by bad speakers. Change them for a try..
If the noise comes from the inner parts of cabinet, it may be produced by abnormal AC current in power board. Change the board and check its surrounding circuits for a try.
Check the routing of wires inside the cabinet to suppress interference.
Troubleshooting
for Displaying
Note: If the troubleshooting given below can not help you, change the LCD panel for a try. But we strongly suggest you regard changing the panel as the last step of fixing the display problem.
No display (including white screen, black screen, etc.)
Check the power board output and main board input ports to make sure whether the TV has been turned on successfully, because the failure in power on can lead to a no-display problem.
If it is proved to have been electrified and turn on, check the LVDS cable first.
Check if both of the two plugs of the flat cable between main board and power board have been well inserted into the slots. Unstable power supply can also cause serious display problem.
If the display problem only happens in one input mode, that may be caused by wrong version software. Update the new software. If that can't help, change the main board for a try.
Note: If the troubleshooting given below can not help you, change the LCD panel for a try. But we strongly suggest you regard changing the panel as the last step of fixing the display problem.
No display (including white screen, black screen, etc.)
Check the power board output and main board input ports to make sure whether the TV has been turned on successfully, because the failure in power on can lead to a no-display problem.
If it is proved to have been electrified and turn on, check the LVDS cable first.
Check if both of the two plugs of the flat cable between main board and power board have been well inserted into the slots. Unstable power supply can also cause serious display problem.
If the display problem only happens in one input mode, that may be caused by wrong version software. Update the new software. If that can't help, change the main board for a try.
Screen tearing, or there exists moire on screen
Bad LVDS cable and inappropriate panel driving voltage is still the biggest factor of this problem. So check them first.
If the cable and voltage are correct, update the software for a try.
Sometimes the fastening pieces can make improper pressure to LCD panel, check them out.
If
the screen tearing happens in one or several input sources while the
other source can display normally, it can be caused by bad main board
most likely. Please change the main board for a try.
Line on screen
If the bad line is very narrow, it is usually caused by LCD panel malfunction, change the panel for a try.
If
the lines link together and become a bad band, upgrade the software and
then check the ports and circuits of broken down output mode(s).
If
the darWlight line ,or band, appears in all the input modes, please
change the LCD panel. But we suggest you check the panel inlet
board(which links the panel and main board though LVDS cable) first,
because sometimes the liquid crystal displaying unit is okay, while the
inlet board has a transmitting problem, which also will lead to a
displaying failure.
color cast or interference
If
the cast or interference happens in only one input mode, check the
output port (on main board) and transmitting network (around main board)
of that mode.
If the cast or interference happens in all the input modes, please exclude the malfunction according to easy troubleshooting for
No Display. If that cannot help, refer to chapter 5 for more details
and resolution ways. In addition, most of this kind of problems come
from the bad main boards.
Troubleshooting for Audio
Note:
Comparing with the display problem, the audio malfunctions are easier
to work out. Constantly, if you have excluded the possibility of bad
speakers and bad connection of audio output, the problem generally comes
from the audio processing parts of main board. Please change main board
for a try.
No Sound
Check whether the speakers are broken first.
Check the wire that links the main board and speakers. Watch if there is fracture or cladding material breakage.
Check
the joint of speakers and audio wire, watch if there is poor soldering
or fake solder. Besides, the polarity mistake can also lead to audio
problem.
Volume too low
Check whether there is a jam at the sound hole in front cabinet.
Check whether one or more speakers are bad.
Sound
channel loss or confounding
Check whether the audio wires are installed reversely. The left channel wire should be white and the right channel wire is red.
Check the audio output socket of main board to see whether it is wrongly inserted. If not, the main board audio output module may be bad, refer to chapter 5 for more details and resolution ways.
If the connection is stable and right, the main board audio output module may be bad, refer to chapter 5 for more details and resolution ways. Noise
Check if there is anything should not exist in the speaker hollow space (such as screws).
Check if the anti-hunting EVA is broken or missing.
Check if the speakers are bad.
Check whether the audio wires are installed reversely. The left channel wire should be white and the right channel wire is red.
Check the audio output socket of main board to see whether it is wrongly inserted. If not, the main board audio output module may be bad, refer to chapter 5 for more details and resolution ways.
If the connection is stable and right, the main board audio output module may be bad, refer to chapter 5 for more details and resolution ways. Noise
Check if there is anything should not exist in the speaker hollow space (such as screws).
Check if the anti-hunting EVA is broken or missing.
Check if the speakers are bad.
Troubleshooting for Keyboard
No key can work
Check the wire between main board and keyboard, watch if there is fracture or cladding material breakage.
Check the joint of main board and keyboard wire, watch if there is poor soldering of fake solder.
Check
the resistances that locate on the keyboard PCB. Watch if there is
wrong or broken ones. Also, the poor soldering of fake solder should be
concerned and checked carefully.
Check the other components of keyboard(such as capacitors and micro switches) are wrong or bad.
Keys
are sunken
Check the screws that fasten the keyboard to the cabinet. They may be lost or getting loose.
The key set may be bad, change them.
There is a reacting delay when operating the keys
That is usually caused by bad keyboard, change it for a try.
Functions of keys are out of order
Check the keyboard to see whether there is a short circuit between each soldering joint.
Check all the resistances on PCB board.
If a key is supposed to be able to achieve more than one functions, but it can achieve not all of them, that is usually caused by wrong software. Update the latest and correct software for a try.
If you can't ensure where the problem comes from, change the keyboard for a try. If that still can't help.
Check the screws that fasten the keyboard to the cabinet. They may be lost or getting loose.
The key set may be bad, change them.
There is a reacting delay when operating the keys
That is usually caused by bad keyboard, change it for a try.
Functions of keys are out of order
Check the keyboard to see whether there is a short circuit between each soldering joint.
Check all the resistances on PCB board.
If a key is supposed to be able to achieve more than one functions, but it can achieve not all of them, that is usually caused by wrong software. Update the latest and correct software for a try.
If you can't ensure where the problem comes from, change the keyboard for a try. If that still can't help.
Troubleshooting
for Remote Control
Note: If the troubleshooting can not help, please change the RC board. If that still can't solve the problem
Note: If the troubleshooting can not help, please change the RC board. If that still can't solve the problem
The
RC (remote control, the same below) does not work
Check the wire between main board and RC board, watch if there is fracture or cladding material breakage.
Check the joint of main board and RC board wire, watch if there is poor soldering or fake solder. Also, the short circuit can lead to this problem, too.
Check the infrared sensor that locates on the keyboard PCB. Watch if it is wrong or broken. Also, the poor soldering of fake solder should be concerned and checked carefully.
Check the other components of RC board are wrong or bad.
Check the wire between main board and RC board, watch if there is fracture or cladding material breakage.
Check the joint of main board and RC board wire, watch if there is poor soldering or fake solder. Also, the short circuit can lead to this problem, too.
Check the infrared sensor that locates on the keyboard PCB. Watch if it is wrong or broken. Also, the poor soldering of fake solder should be concerned and checked carefully.
Check the other components of RC board are wrong or bad.
The
LCD displays light in wrong color
The short circuit is the most probable cause of this fault. Check the wire and joints for a judgment.
Check the cable that links main board and RC board, watch if it is inserted with wrong location(similar with left-right channel wire fault for audio).
Check the LCD assembling, watch if its pins are in wrong location.
The short circuit is the most probable cause of this fault. Check the wire and joints for a judgment.
Check the cable that links main board and RC board, watch if it is inserted with wrong location(similar with left-right channel wire fault for audio).
Check the LCD assembling, watch if its pins are in wrong location.
Display Exceptions
Black screen and no display
Note:
If the troubleshooting guide cannot help you with the obviation of
faults, please change the non-conforming materials to rework.
V260B2-
P03 is a 26-inch TFT LCD cell with driver ICs and Ich-LVDS interface.
This module supports 1366 x 768 WXGA format and can display 16.7M colors
( 6 bit+Hi FRC). The backlight unit is not built in.
Specs and other descriptions
Diagonal Display Size: 26 inches
Television System: American TV standard ATSC/NTSC system
Channel Coverage: VHF: 2-13 UHF: 14-69 CATV: 1-135
Digital Terrestrial Broadcast (8VSB) : 2- 69
Digital Cable (64/256QAM) : 1-135 Power Supply: AC 110 V, 60Hz Audio output: Headphone x 1, Digital Audio Out x 1, AV x 1 Resolution: 1366 x 768 Component/HDMI mode: 480i, 480p, 720p, 1080i Weight: 15.9LBS (7.2KGS) Power Consumption: less than 80W
Digital Terrestrial Broadcast (8VSB) : 2- 69
Digital Cable (64/256QAM) : 1-135 Power Supply: AC 110 V, 60Hz Audio output: Headphone x 1, Digital Audio Out x 1, AV x 1 Resolution: 1366 x 768 Component/HDMI mode: 480i, 480p, 720p, 1080i Weight: 15.9LBS (7.2KGS) Power Consumption: less than 80W
> HEAD
PHONE: Connect a 3.5mm headphone for personal audio.
> Digital Audio-out: Connect a coaxial cable for digital audio output. HDMII, 2, 3, 4: (High-Definition Multimedia Interface) It provides an uncompressed digital connection that carries both video and audio data by way of an integrated mini-plug cable.
> AUDIO OUTPUT L/R: Connect double-channel coaxial cables for analog audio output.
Note: .Digital Audio-out and AUDIO OUTPUT L/R are supposed to be connected to audio power amplifier, which provides smoother and more powerful sound performance.
> AUDIO-IN L/R, Video In: Connect an AV device that has composite video jacks, such as a VCR or a DVD player. To access device connected to these jacks, press the INPUT button on your remote; then press the up/down arrow to select AV. Press the ENTER button at last to confirm.
> AUDIO-IN L: Left audio channel connection. The left audio connector is usually white. For mono audio sources, be sure to use the left AUDIO INPUT.
> AUDIO-IN R: Right audio channel connection. The right audio connector is usually red.
> COMPONENT Y/Pb/Pr: Connect a device that has component video jacks, such as a DVD player. To access device connected to the Y/Pb/Pr jack, press the INPUT button on your remote; then press the up/down arrow to select Component. Press the ENTER button at last to confirm.
> Y/Pb/Pr (Component Video): They provide good picture quality because the video signal is separated into three components. Use three video-grade or component video cables for the connection. When using Y/Pb/Pr, make sure you connect left and right audio cables to the Audio L and Audio R jacks.
> PC INPUT VGA: Connect your computer or other device with a VGA output to this jack using a 15-pin, D-sub cable.
> PC INPUT Audio-In: Use to obtain sound when a PC is connected to TV. Use 3.5mm stereo mini-pin cable to connect PC to TV.
> ANT/CABLE: Connect to receive the signal from your antenna or cable via coaxial cable.
> SERVICE: For service use only. Do not connect any device.
> Digital Audio-out: Connect a coaxial cable for digital audio output. HDMII, 2, 3, 4: (High-Definition Multimedia Interface) It provides an uncompressed digital connection that carries both video and audio data by way of an integrated mini-plug cable.
> AUDIO OUTPUT L/R: Connect double-channel coaxial cables for analog audio output.
Note: .Digital Audio-out and AUDIO OUTPUT L/R are supposed to be connected to audio power amplifier, which provides smoother and more powerful sound performance.
> AUDIO-IN L/R, Video In: Connect an AV device that has composite video jacks, such as a VCR or a DVD player. To access device connected to these jacks, press the INPUT button on your remote; then press the up/down arrow to select AV. Press the ENTER button at last to confirm.
> AUDIO-IN L: Left audio channel connection. The left audio connector is usually white. For mono audio sources, be sure to use the left AUDIO INPUT.
> AUDIO-IN R: Right audio channel connection. The right audio connector is usually red.
> COMPONENT Y/Pb/Pr: Connect a device that has component video jacks, such as a DVD player. To access device connected to the Y/Pb/Pr jack, press the INPUT button on your remote; then press the up/down arrow to select Component. Press the ENTER button at last to confirm.
> Y/Pb/Pr (Component Video): They provide good picture quality because the video signal is separated into three components. Use three video-grade or component video cables for the connection. When using Y/Pb/Pr, make sure you connect left and right audio cables to the Audio L and Audio R jacks.
> PC INPUT VGA: Connect your computer or other device with a VGA output to this jack using a 15-pin, D-sub cable.
> PC INPUT Audio-In: Use to obtain sound when a PC is connected to TV. Use 3.5mm stereo mini-pin cable to connect PC to TV.
> ANT/CABLE: Connect to receive the signal from your antenna or cable via coaxial cable.
> SERVICE: For service use only. Do not connect any device.
Universal Remote control set-up codes to check with RCA brand TVs
0154 0190 0196 0218 0233 0237 0436 0673 0827