Saturday, 3 September 2022

TCL 39S62-NT63EP2-LA How to enter the service mode, service mode adjustments, how to upgrade, upgrade details about test and alignments

 

These chassis are designed for European LCD TV markets Ready for IPTV. The main chip is from novatek NT72563 series with embedded Linux core and supports below features matrix:

NT72563 D2900

NT72563 P6

Manufacturing Connectors Pin out

ISP-UART - P15   Pin1: NC.  Pin2: RXD.  Pin3: TXD.  Pin4: GND.

USB to UART Bridge Adapter (FT2232D chipset series)

To communicate with TV product for debugging, adjustment and so… it’s required suitable 0.5V Serial Interface like following snapshot (further details are described on below sections):

Test and Alignment Specification for NT63 Series (v0 01) 170612

All tests and measurements mentioned hereafter have to be carried out at a normal mains voltage (220 ~ 240 VAC)
All voltages have to be measured with respect to ground, unless otherwise stated
All final tests have to be done on a complete set including LCD panel in a room with temperature of 25+/-7°C
The Picture Performance assessment such as White Balance (luminance and colour temperature) has to be performed into subdued lighted room after at least 45min of warm-up in order to avoid any temperature drift influence (colorimetric vs. time)

PCB-SKD Assembly: Test & Alignment

Pre-Conditions and DC/DC Check
Before power-on, please check the board according to the relevant block diagram and circuit diagram, and make sure that no serious issue or mistake can destroy the board. For example, the output of DC/DC and LDO should not be shorted to ground.
Supply a suited voltage and power-on, then check the voltage according to the relevant block diagram, circuit diagram and voltage specification.
For example, check SoC voltage (3V3, 1V8, CORE_1V2, 5V, 5VSTB, etc.), DDR voltage (DDR-1V5), audio amplifier voltage (12V), etc...
Measurements should fulfil specification within ±5% tolerances.

SW Image download
Download the latest release SW from below FTP server:
Link: \\10.120.99.200\
Username:
Password:
Folder:
\\10.120.99.200\Software-release\Debugging-TS-SW\Novtek\NT563

LR or PR step. ---Only test
In case of starting from blanked flash / eMMC, it’s necessary to use “Blank upgrade” to update the SW.

MP Step
In case of starting from blanked flash, it’s necessary to write “ V8-N563T01-LF1VXXX _emmc_writer.bin” file via factory copy in advance.

OAD Stream
To manage quicker mass reflashing on predefined DVB Channel, some licensed IBL tools ('xxx2lli.exe', 'lli2dsm.exe',dsmmerge.exe …) from Intel byte Inc. might be necessary to create appropriate DVB SSU image. Over some predefine settings such as repeated data block insertion, null packets size, … that are controllable in configuration file, here below are mandatory OUI entries structure to prepare DSM-CC carousel image format:

export CUST_OAD_OUI
export CUST_OAD_HW_MODEL
export CUST_OAD_HW_VERSION
export CUST_OAD_SW_MODEL
export CUST_OAD_SW_VERSION

0x001C50
0x5395
0x0000
0x0001
0x00
..

OAD reflashing is managed within 4 steps operation: multiplex detection, DVB transfer, flashing and warm-start.

UART & IR Parser
To use both UART and/or IR parser, TV has to be set in Factory mode with its USB port well connected to suitable UART device or an IR emitter device correctly facing up TV (see below “Product Assembly - section 2.0” how to activate “Factory key”).
The UART parser engine is enabled by sending following command “0xE2” from host to TV within following presets 115200/8/n/1.
Once initialized, “PS” caption is toggle displayed on bottom left screen (“S” like Serial).
To communicate with TV depending on SIACP revision layout implementation, you need to fulfil UART/IR commands protocol and format described on enclosed SIACP requirements document.

Project ID Modification
There are different IDs stored in the eMMC depending on different Panels settings and Models features, but there’s only one key branching Project ID that includes all. So, it’s not recommended to modify Panel ID with Hyper terminal as other ID features may not change.
To modify Project ID, you need to go through “Factory menu -> Other -> Project ID -> Project ID”, then spin left or right with RCU “◄/►” keys to chose suitable ID (Project name is dynamically refreshed).It is necessary to press “OK” key for saving the setting.

“How to change Project ID with RCU”

See below is the Project ID table for reference:

Functional Test
Once the boards (chassis, KB, IR, PSU…) and the panel are well interconnected, plug all external generator devices to relevant below inputs/outputs using respective test patterns format to check picture and sound quality:

Audio tones can be defined by the factory (ie: 1KHz & 3KHz, sweep …).

Picture video formats can be changed by the factory according to their own standard.

AD Calibration Test
As the A/D self-calibration mechanism is built-in Soc, there’s no any ADC to perform.

DDC & EDID & T-Link Test
The E-EDID data structures are according to VESA Enhanced EDID 1.3 (and EIA/CEA-861B for HDMI). CEA Timing Extension structure has been extended to support all 3D capable timings.
All HDMI structures have their own BIN profile which are part of main SW and uploaded at power-on into soc chipset:
For EDID check, it’s needed to check whether the correct EDID is downloaded by checking corresponding EDID NVM Checksum or read them out to check bit by bit if it is in line with the released EDID bin file.

HDCP Test
For HDCP compliancy, it’s needed to check whether the HDCP key has been well set by connecting suitable generator.

CI+ Key Upgrade, Activation and Test

See “How to upgrade CI Key using USB”, “How to upgrade ESN Key using USB”, “How to upgrade HDCP key & HDCP2.0 key using USB”

LAN and WLAN Test (MAC address and Device or User ID codes)
Here are some representative codes examples:

MAC Address Upgrade (IPv6)

MAC can be set using UART commands described on enclosed SIACP requirements (rev. v3.9).
Writing MAC command <0xB3>, Data length <6>, Data type <HEXA> (see below command example from above MAC code) <AA 0B B3 5C 36 B8 A8 9D CC 36 78>

Device ID (DID)

Purpose is to allow Other Newtork Download (OND) and further specific Services via dedicated abroad portal (UK tbc).4 At final, when TV may ask for portal connection, there’ll be Device ID matching control sent by host (TV client) to ensure total integrity.

For such, specific DID (40 bytes) needs to be paired and overwritten into memory for internal client encryption.
All DID and MAC codes have to be download from portal local service via suitable factory workstation LAN system.
Then during production lot, it’s necessary to send/write all those codes to each TV.
DID codes can only be set using UART commands described above on enclosed SIACP requirements (rev. v3.9).
 Writing Device ID command <0xB2>, Data length <32>, Data type <ASCII> (see below command example from above DID code)
<AA 25 B2 42 45 34 46 32 35 35 42 42 44 31 30 36 42 43 38 46 38 30 36 41 45 34 35 36 33 35 30 44 39 31 46 48 93>

LAN Test

A rough LAN test can be done by connecting DHCP server to TV’s RJ45 and check that IP, subnet mask, DNS, …
addresses are visible on “Settings
à NetworkàInternet connection(On)àIP settings”.
More in-depth test can be performed faster using suitable UART/IR commands following SIACP requirements. SW will internally manage Network ID (NID) flag controlling all MAC/DID/UID integrity to facilitate PA screening further.

It’s not necessary to check video and audio from DLNA server.

Factory Menu
Follow the below steps to pop-up the Factory menu in case of “Factory hotkey” is disabled:
Press RCU “MENU” key to display Setting menu
Select Picture
Scroll down to “Contrast” item
Press the subsequence RCU keys “
9”, “7”, “3” and “5
In case of “Factory hotkey” is enabled, just press RCU “Return” key
 to pop-up again the Factory menu.
The status of “Factory Key” can be changed in “Factory Menu->Hotkey”
Press RCU “OK/►” key to enter the submenu.
Press RCU “Menu” key to go back to the root menu.
Press RCU “◄/►” key to change the values.
Press RCU “OK” key run the function.
Press RCU “Exit” key exit the Factory menu.

Factory Captions Description
While “Factory hotkey” is enabled, there’s some toggled display information (~2s) relative to SW, Project ID, CI+, Network ID to facilitate 100% quick screening without accessing to whatever else menu:

Main SW Ver
Project ID (ID)
ERG(PVR)
CI Key Activation flag (CI+ key)
MID(Internet infor for factory)
P (Production/Factory mode flag) / S (Factory UART Parser mode flag) / W (Warm-Up mode flag)

Warm-up Test
Following TCL standard and practices, it’s required minimum 15min of Warm-Up that can be considered as Burn-In.
Additional Aging for White Balance alignment is no more necessary due to consistent Picture Performance with Cloning usage.
This function is accessible by selecting “Factory menu
àWARM UP”, pressing RCU “OK/►” key and then leaving Factory menu by pressing “Exit” key. To release/disable Burn-in mode, it’s just required to press “Menu” button from local keyboard. Other faster methods via UART/IR commands are available on enclosed SIACP requirements (rev. v5.4).

White Balance Touch-Up (Golden sample)
As some colour coordinates discrepancies can be noticed from panel batches to others, it may necessary to perform slight touch-up.
For Colour temperature adjustment, switch TV on leading HDMI input where should be connected suitable generator providing following format 1280x720p@60Hz test pattern. A 32 steps grey scale is recommended to assess relevant calorimetric tracking and low/high light saturation points.

Ensure that TV’s picture enhance is off.
Ensure that TV is in Factory mode to access to ”White Balance” adjustment submenu, then scroll down to toggle off “Pic. Enhance” flag.
WB Normal is the first mode which is adjusted in HDMI source
the next are HDMI warm and cool mode.
Warm and Cool Tone are relatives to Normal mode. WB adjust need to fix default G Gain .Offset registers needn’t to be adjusted.
“Gain” registers set need to be adjusted at 70IRE.

Targets and Tolerances for all inputs
(According to company uniform LED color temperature standard of panel)
The measured and adjustable parameters should be mainly “x”, “y” coordinates.
The White Balance alignment should be performed using a well calibrated and contact less analyzer (ex: Minolta CA210 or CA310). The analyzer may not touch the screen surface, and measurement must be performed in a dark environment keeping the probe(s) at 90+/-2° from the panel centre.
The results should fulfil specification for each TV set offered by R&D and below tolerances::

Important: If measurements are performed on whatever else LED panel with Minolta CA210, it’s required to calibrate additional channel (ex: CH01) using relative following offsets (CH00 remains for CCFL panel): +0.002 for “x” and +0.012 for “y”.

Cloning
Once a TV is well aligned and prepared (channels maps, volume, picture presets…), user can prepare golden clone image that can be copied on demand to all further TV production lot of same TV. To access cloning function, you can select “Factory menu àUSB Clone && Update”, Scroll down to “TV to USB” or “USB to TV” and press RCU “OK/►” key to process. 4 BIN images will be created, overwritten or read on USB stick (pen drive) depending on chosen template like following: “database\database\***.db”. These files need to be used strictly with MT5655 SoC platform as depending on SW structure.
Other faster access methods via UART/IR commands are available on enclosed SIACP requirements.

High Pot and Insulating Resistance Tests
At the end of the process, a “High Voltage” and an “Insulating Resistance” tests are required to fulfil Safety Electrical requirements (CEI 65065).
High Voltage Withstanding requirements
▪ Insulating Resistance requirements
“Voltage” > 3500 VAC - “Voltage” > 500 VDC
“Max Leakage Current” > 10 mA - “Threshold Min” > 4M Ω
“Test Time” > 3 sec - “Test Time” > 2 sec

SHOP-END Test
At final process stage, it’s necessary to perform “Reset shop” before any packing to leave Factory mode and restore User default presets.
This function is accessible by selecting “Factory menu - 
Reset Shop”, then pressing RCU “OK/►” key. Other faster methods via UART/IR commands are available on enclosed SIACP requirements.

A password might be required in case of Parental Control function is locked, use default “1234” password or “0423” super password to clean-up existing ones if forgotten.

“How to upgrade SW FLASH using Blank upgrade”
Download boot bin “ tcl_m1v1_eu_secure_emmcboot.bin” & blank upgrade main software“upgrade_loader.pkg” from the software website.
Connect UART interface to suitable manufacturing TV input connector, upgrade boot bin first to blank IC.
1)
copy all files under the directory to the root directory of the u disk..
2)
Serial port with USB 3.0 port, USB flash disk to connect USB 2.0.
3) Locate the p901 port on the motherboard ( near the high frequency tuner ), short with tweezers or other tools.
4) Ac on the AC, the following serial port shows that is in the air, tweezers and other tools to remove, do not need to be short.

After finish update SW, TV will reboot automatically and please remove USB key.
Remember to perform “Factory menu - 
Reset ALL“ and “Factory menuàReset Shop“, and then press RCU “OK/►” key

“How to upgrade main software using USB”
Copy the MAIN SW BIN image “V8-N563T01-LF1Vxxx.bin” into USB stick (pen drive) root path.
Name “V8-N563T01-LF1Vxxx.bin” as “update.zip”, please delete other xxx.pkg files from USB stick.
(Make sure the USB remaining available storage is more than 1GB)
Plug USB stick to the TV.
Power on TV by AC, at the same time press “power on” key for 10s, TV will update SW automatically.
When reflashing is successful, TV should restart automatically (about 4min).
Remember to perform “Factory menu - 
Reset ALL“ and “Factory menu - Reset Shop“, and then press RCU “OK/►” key.   Finally, restart the TV.

How to upgrade main SW using USB and RCU
Power on TV.
Copy the SW BIN image “V8-N563T01-LF1Vxxx.bin” into USB stick (pen drive) root path.
Plug USB stick to the TV. Option-->settings--> Support--> Software update -->By USB. TV will find Vxxx and please do “update”.
TV will update SW automatically, and show some notes on TV.
When reflashing is successful, TV should restart automatically after ~4min.
Remember to perform “Factory menu
àReset ALL“ and “Factory menuàReset Shop“ and then press RCU “OK/►” key.
Switch off TV by removing AC cord. Reconnect AC cord to restart TV.

“How to change Project ID with RCU”
 Process following subsequence IR codes to change projectID: 062598+MENU+xxx (xxx:ProjectID, ex: 001)
 If it works, the TV will restart automatically.

“How to upgrade CI+ Key using USB”
Create a new folder named “CI+KEY” on USB stick (pen driver) root path.
Copy corresponding “*.key” files into CIKEY folder.
Under CIKEY folder, create a new folder named “backup” (once the CI key is overwritten, the matching key file will be moved to this folder)
Plug USB stick to the TV
Go to “Factory menu - 
Other - Update CI+ Credential - Update From USB“ and then press RCU “OK/►” key
The “Valid” flag should now be enabled (turns to “Yes”), “Custom Code” should display “TCL” and “Serial Num.” field should update with Key number.
Remove USB stick
Note
: If unfortunately the process failed, you may need to download new CI key and repeat operation again.

How to upgrade Netflex ESN using USB”
Under USB root path, create a new folder named as “esn”, then copy corresponding ESN KEY bin files into this folder;
Under “esn” path, the key should be named as “
nflxk_***”,like this ,
Plug USB stick to the TV;

Go to “Factory menu >  Clone & Update  > ESN Key Upgrade“ and then press RCU “OK” key
Remove USB stick

If unfortunately the process failed, you may need to download new ESN key and repeat operation again.

“How to upgrade HDCP key & HDCP2.0 key using USB”
Copy HDCP.bin, HDCP2.bin into USB stick (pen drive) root path, please pay attention to the spell.
Picture ->contrast -> “
1950” -> Main Menu
Go to “Main Menu > Service Menu > USB UPDATE > HDCP Upgrade (HDCP2.0 Upgrade)

“How to upgrade MAC Address using USB”
Go to “Factory menu > Other > IPTV > Update MAC Address > Update From USB,but there is no this function which is only displaying.
The “Written status” flag should now be enabled (turns to “Yes”) and “MAC address” should display corresponding address like onto below snapshot:

“Network Connection Setup”

Note: You can set up your TV so that it can access the Internet through your local area network (LAN) using a wired or wireless connection.
▪ Wired Network Connection
You can connect your TV to your LAN using cable in three ways:
1) Plug your TV to your LAN by connecting the LAN port on your TV to an external modem using a Cat5 cable.
2) Plug your TV to your LAN by connecting the LAN port on your TV to an IP Sharer which is connected to an external modem. Use Cat5 cable for the connection
3) Depending on how your network is configured, you may be able to plug your TV to your LAN by connecting the LAN port on your TV directly to a network wall outlet using a Cat5 cable (Note that the wall outlet is  attached to a modem or router elsewhere in your house)
Select “Option > 
Settings > Network - Internet connection (On) Interface > Ethernet”, then select “IP settings” to connect to network.

Wireless Network Connection
To connect your TV to your wireless network, you need a wireless router or modem and a Wireless LAN Adapter.
Connect your “Wireless USB Adapter” (USB dongle) delivered with your TV to your TV’s USB .
Select “Option > 
Settings > Network > Internet connection(On) > Interface”, then select “Wireless” to connect to a wireless network
Select “Wireless settings” and press “OK/►” to enter.
You can setup the wireless network connection three ways:
1) “Scan” mode
Select “Wireless settings
 > Scan”, then press “OK/►”, the TV will scan all available access points and then display them.
Select an available access point, then press “OK/►” to connect the TV to it.
Note: If you select a protected access point, you will have to enter the corresponding password. Press “OK” on the remote control to display virtual keyboard to enable you to enter the password.
2) “Manual” mode
Select “Wireless settings
 > Manual”, then press “OK/►”, you will be prompted to enter the correct SSID of an available wireless router to setup the connection.
3) “Auto” mode
If your AP supports WPS (Wi-Fi Protected Setup), you can connect to the network via PIN (Personal Identification Number) or PBC (Push Button Configuration). WPS will automatically configure the SSID and WPA key in either mode.
Select “Wireless settings - 
Auto”, then press “OK/►” to enter.
Network Setup

Press “Option” on the remote control and select “Option - Settings - Network - Internet connection”. Then press “OK/►” key to select “On”. Wait until the connection is automatically established.
Select “Option -
 Settings - Network - Connection test”, then press “OK/►” to check the Internet connectivity. If failed, follow below steps to ensure connectivity
Select “Option -
 Settings - Network - IP settings”, then press “OK/►” to enter into “IP settings” submenu
Set “Address type” to “Auto” by pressing “OK/►” key, it will acquire and enter the new detected IP address automatically.  You can also follow below steps to enter your IP address manually.
Set “Address type” to “Manual” by pressing “OK/►” key, then press “▼” key to go to the first entry field.
Enter the “IP address”, “Subnet mask”, “Default gateway”, “Primary DNS” and “Secondary DNS” values. Use remote control digital keys to enter numbers and “◄/►” key to move from one to other field location
After setting all required inputs, select “Option-->Setting - 
Network - Connection test” to check the Internet connectivity again
Select “Option
 > Settings > Network > Information”, then press “OK/►” key to display current connection details, such as Interface, Address type, IP address, etc..

“How to upgrade Flash SW using Network”
Please follow Appendix (10), make sure your TV is connected on the internet.
Update through the menu
Select “Option > Settings > Support
 > Software update > By network”, then TV starts to search new software automatically .If new software is detected, the page will show the button and hint that can guide you.

Select “Download”, software will be downloaded automatically. The download progress will be shown in the lower right corner:

Please follow the instructions on TV if download or update failed. And you can check your network and try again.
Please wait for a moment, when the progress appears from 0% to 100%, TV will show a dialog to ask you if you want to update.

You can select “Later” if you don’t want to update now. While you select “Never”, the dialog will not be shown until new software is detected.
Select “Update”, TV will update automatically. First the following dialog will be shown. Then TV will restart automatically to finish updating:

Please do NOT power off TV until it restart successfully.
You can select “Option - 
 Settings - Support - Software update”, the “Current version” shows the new Software version.
Update through auto detection
When your TV has powered on and connected on the internet, a dialog will appear on TV if TV detects new.

You can select “Later” if you don’t want to download software and if you select the “Never”, the dialog will not be shown until another new software is detected.
Select “Download” and TV will download automatically;
All the following operation is same as “Update through the menu”.


Sunday, 31 July 2022

Akai 21CT32FSR CRT TV – RF PAL B-GM, SECAM D-K, AV PAL, NTSC 3.58-NTSC 4.43-TDA 93X1 MAIN CHIP, How to enter the service mode, all adjustments

 

The main chips instruction: TDA93X1
The UOC (“Ultimate One Chip”) TDA93X1 is adopted in this chassis. This IC is the first available component that contains the complete control and small signal functionality needed for a TV application in one device.
The UOC TDA93X1 pins function description
:total 64 pins
Pin1: Standby control,1is on,0is off.
Pin2: SCL.
Pin3: SDA.
Pin4: Tuning PWM output.
Pin5: Auto AV control SW/NTSC SW,
Pin6: Key board input.
Pin7: Volume
Pin8: Mute control,
1is mute,0is off.
Pin9: Pin12,
 Pin18, Pin30, Pin35, Pin41, Pin55: GND.
Pin10: BAND1 control output.
Pin11: BAND2
Pin12: GND
Pin13: SECAM PLL, connected with a capacitance.


Pin14: +8V power source supply.
Pin15: Using a capacitor of 220n in series to GND, This pin decouples the internal digital supply voltage of the video processor and minimizes the disturbance to the sensitive analogue parts.
Pin16: PHI-2 control loop, this pin requires a capacitor at 2.2nF (C) in series to GND.
Pin17: PHI-1 control loop, the loop filter connected to pin 17 is suitable for various signal conditions strong/weak and VCR signal. This is achieved by switching of the loop filter time constant by changing the PHI-1 output current.
Pin18: GND.
Pin19: Band gap decoupling, the band gap circuit provides a very stable and temperature independent reference voltage. This reference voltage (4.0 V) ensures optimal performance of the analogue video processor part of the N301 and is used in almost all functional circuit blocks.
Pin20: East-west pillow signal output.
Pin21: Pin22
Vertical drive output.
Pin23: Pin24
IF input.
Pin25: Reference current, This pin requires a resistor to ground. The optimal reference current is 100mA which is determined by this resistor. The 100mA reference current should not be changed because the geometry processor is optimised for this current. Furthermore the output current of vertical drive and EW are proportional to this current.
Pin26: Vertical saw tooth. This pin requires a capacitor to ground of 100Nf

Pin27: AGC output. This output is used to control (reduce) the tuner gain for strong RF signals.
Pin28: Audio de-emphasis.
Pin29: Sound decoupling. This pin requires a capacitor connected to ground. The pin acts as a low ass filter needed for the DC feedback loop.
Pin30: GND.
Pin31: Sound loop filter.
Pin32: AVL filter.
Pin33: Horizontal drive signal output needs a resistor in series to +8V.
Pin34: Sandcastle output/fly back input,
Pin35: External audio input, this pin should be grounded in this chassis.
Pin36: EHT tracking/ overvoltage protection. If something is wrong, the anode high voltage rises, the heater voltage will rise too. When the rising voltage arrive some limit, the VD461 works, the voltage of pin 36 will exceed 3.9V, the N301will stop working.
Pin37: PLL loop filter.
Pin38: CVBS output. Monitor or RF videos can be selected.

Pin39: +8V supply source.
Pin40: CVBS input.
Pin42: Y signal input.
Pin43: C signal input.
Pin44: Main audio output
Pin45: RGB signal input blanking.
Pin46, Pin47, Pin48: RGB signal input.
Pin49: ABL. It means been current limiter input. The R464 is the control resister.
Pin50: Black current input from the CRT board.
Pin51, Pin52, Pin53: RGB drive signal output to the CRT board.
Pin54: +3.3V.
Pin55: GND.
Pin56: +3.3V.
Pin57, Pin58, Pin59: 12MHz crystal.

Pin60: Reset, NC in this chassis.
Pin61: +3.3V
Pin62: This pin is connected to the HEF4052, Functions expanding.
Pin63: This pin is connected to the HEF4052, Functions expanding.
Pin64: IR signal input.
2 Memory AT24C08 is an E2PROM of 8k, pins describe as follows:
Pin1, Pin2, Pin3,Pin4, Pin7: GND. Pin8: +5V supply.
Pin5: SDA. Pin6: SCL

HEF4052 is described as follows: total 16 pins

Signal process
The main chip is N301 TDA93X1 AV control switch HEF4052, sound driver is N101 N17821A
.
The TV signal inputs into the tuner (A101) from CABLE or antenna. The pin 10 and pin 11 of the N301 are combined to select the band. The pin 4 of the N301 outputs the PWM tuning signal. The IF video signal comes from the IF pin of the tuner. The 38.9MHz IF signal is coupled to the V308 (pre-amplify) and then to SAWF (Z301). After processed in the SAWF, the 38.9MHz signal gets to the pin 23 and pin 24 of TDA93X1. The IF circuit in TDA93X1 includes such unit as the AGC amplifying circuit, 38.9MHz oscillator, PLL video demodulator, video amplifier, IF identify circuit and AFT circuit. The demodulated signal (CVBS) comes from the pin 38 of TDA93X1, the sound signal comes from the pin 44.The internal CVBS signal needs norm identification then outputs from the pin 38 of TDA93X1, via the trap-wave circuit (composed of the V351, Z354, Z352) feeds back to the pin 40 of TDA93X1. The RGB signal comes from the pin51, Pin52, Pin53 of TDA93X1, and outputs to the CRT board.
The internal sound signal comes from the pin 44 of TDA93X1, via the coupling capacitor C367 connects to the pin 3 and 5 of TDA9859. The TDA9859 is the audio effect processor, the AN7522N is the driver. The TDA9859 includes bass, treble, balance, surround, effect shortcut options.  Through Synchronous separating circuit, the video signal is divided into Horizontal-Synchronizing signal and Vertical-Synchronizing signal. The horizontal-Sync pulse coming from the pin 33 is transferred to the horizontal-drive transistor, and will be used to drive the horizontal-transformer. The horizontal-switch transistor is V451, it and the +B supply drives the flyback transformer to generate the anode high voltage, the focus voltage, the screen voltage, the CRT board drive voltage 180V, the vertical drive voltage 15V and -15V.  The vertical sawtooth wave is generated on the pin 21 and 22, and then enters the vertical output amplifier circuit. The vertical output amplifier circuit is realized with the power amplifier IC –LA78040.
The TDA8177 is a 7 pins vertical deflection circuit (2 Amperes) for DC-coupled 90° or 110° deflection systems with frame frequencies from 50 up to 120 Hz. Only a single supply voltage for the scan and a second supply for the flyback are needed.
The vertical drive currents of N301 pins 21 and 22 are connected to input pins 1 and 7 of the TDA8177. The currents are converted into a voltage by resistor R405. Pin 2 is on a fixed DC level (internal bias voltage, about 2.3V) and on pin 1 the drive voltage can be measured (typical 1.4 Vpp).

The outputs (pins 4 and 7) are connected to the series connection of the vertical deflection coil and feedback resistor R404 and R406. The voltage across R404 and R406. is fed via pin 1 to obtain a deflection current which is proportional to the drive voltage. The supply voltage for the TDA8177 is 17V at pin 3. The flyback generator has a separate supply voltage of V on pin 6. On pin 4 a vertical guard signal is available. For HF loop stability a damping resistor R407 is connected across the deflection coil.

Power supply (SMPS)
The IC of KA5Q0765RT is adapted in this chassis; it is the product of Fairchild. It supplies four DC voltages, one is the +B
110V, another is Hcc 26V, the third is 13V (the sound drive voltage),  the fourth is +16V. The +16V can generate the +8V, +5V and +3.3V by the special generators.

TDA 93X1

AN17821A illustration

TDA8959 illustration

Adjustment method
Main power +B setting
Receive standard color pattern RF signal set picture to Standard Mode. Adjust VR501, to get +B (VD631 -) voltage =110 V

How to enter the factory mode

With remote controller of factory, continous push [test] key on the remote controller, the TV will hang as fallow:

Normal > M > BUS OPEN > you can select “M” ( factory mode ) or “normal” mode.

For remote controller of user
Push [menu] key 
display picture manual → push digital key 8500 → display M.
Push [standby] key, exit factory mode and TV will be standby.

MENU8 Geometrical adjustment .
Receive standard Crosshatch pattern signal for PAL system .
Horizontal line Shadow
1) Adjust VSLOPE value
to the horizontal line just appear from half bottom shadow.
2) Adjust VSHIFT value
the centre horizontal line correspond to CRT vertical centre.
3) Adjust Vamp value
to get 90% of vertical picture contents would be displayed on CRT.
4) Adjust HSHIFT value
to get the picture horizontal centre correspond to CRT horizontal centre.
5) Receive standard Crosshatch pattern signal for NTSC system, and again adjust.

MENU7 AGC-TOP adjustment
Receive 60dBu (1mv)VH color bar signal adjust AGC valuevoltage from high to low, to picture noise reduce gradually to be just disappeared.

MENU9 CRT cut-off and white balance and sub-brightness adjustment.
Receive gray and white 2 steps signal.
a) CRT cut off adjustment.
1. push [▲P+][▼P-] key to select “SC”, push [►V+][◄V-] key then automatically vertical scan will be stopped.
2. adjust SCREEN control on Flyback transformer to get the darkest single horizontal line (red
, green, or blue, sometimes shows more yellow, more purple or more white).
3. push [V+][V-] key again, vertical scan work repeat.

b) white balance adjustment.

1. Select RD/BD menu.
2. Adjustment RD/BD to get color temperature as x=281, y=311.
c) Sub-brightness adjustment (use stair case signal)
1. Select SB MENU.
2. Adjust SB to get the darkest step being on or off.

White balance adjustment table




Full schematic diagram


Wednesday, 5 January 2022

Sharp LC32-32 INCH LED TV - how to enter the service mode, how to upgrade the software

 

How to enter the service mode, service adjustments, and factory settings

Press the RC buttons in this sequence: “Menu 1 1 4 7” to enter the factory menu.

Service menu (Factory Menu) descriptions.

SHIPPING INIT
BURNNG MODE
ADC ADJUST
PICTURE SETTING
SOUND SETTING
GENERAL SETTING
DEBUG

PANEL SETTING
EMC SETTING
SW INFORMATION
BOARD INIT
SW UPGRADE
OTA SETTING

FACTORY SETTING
SHIPPING INIT:
TV Initialization and all parameter to be default. Designed for Shipment.
BURNING MODE: For test panel. If it’s in
operation, use key board “power” to quit.
ADC ADJUST: Change ADC parameters
PICTURE SETTING: Change Picture Setting
SOUND SETTING: Change Sound Setting
GENERAL SETTING: Some other settings usually used, and also for Debug
DEBUG: Debug mode.
PANEL SETTING: Change panel parameters
EMC SETTING: Some settings may affect EMC
SW INFORMATION: Display some system information.
BOARD INIT: Initialize TV, restore to factory configuration.

SW UPGRADE: Software update item.
OAD SETTING

Board Type: Display board type
Build Time: Display Firmware build time
HDCP Check: HDCP key status
MAC Address: MAC Address

Software upgrading

The rules of USB upgrade file name
The upgrade file name must be "allupgrade-6486-SOS.bin"
Preparation
Prepare (6486 board) for upgrading.

Upgrade Introduce
Copy the upgrade file into the USB Flash Disk.
Insert the USB Flash Disk Into the USB PORT of 6486 board.
Turn On your 6486 board.
If the upgrade file is correct, the software will begin upgrade automatically.
Upgrade interface
Upgrade interface

Upgrade Introduce
Copy the upgrade file into the USB Flash Disk.
Insert the USB Flash Disk Into the USB PORT of 6486 board.
Turn On your 6486 board.
If the upgrade file is correct, the software will begin upgrade automatically
Darning upgrade process, screen will display upgrade progress information, and please do not turn off your TV, it will reboot automatically while the upgrade is complete.
100% mean the upgrade is complete, then pull out USB storage and restart TV

Error means upgrade fail. If upgrade fails, please turn off your TV and try to upgrade again.

Led flash mode
Durning upgrade process, we can know about the upgrade status from the LED flash mode.
During upgrade
RED 1000ms GREEN 1000ms flashing, until upgrade succeed or fail.
Upgrade succeed
RED 250ms GREEN 250ms flashing, Long time to blink until power off.
Upgrade fail
RED 1750ms GREEN 250ms flashing, Long time to blink until power off.

Mboot upgrade.

For Secure Chip.
1. Connect the Uart debug tool, Disconnect the tool which you used to get log information.
2. Open the MSTV-Tool.exe.
3. Press the button “Show Device ID” to show the Device ID.

4. Search the device ID you get in the “6486DevciceID.xlsx” file, you will find a key string above the device ID string. If you can not find the device ID in the file, please send you device ID to us (caihuaqin@cvte.com),we will send the key to you.

5. Select View->OpenDebugPort and enter the OpenDebugPort menu, input the key string you get in step4 at the OpenDebugPort menu and press Run button of the OpenDebugPort menu. Check and make sure run successfully.

6. Select “Help-> Product Key” and enter Product Key menu, input “prognand” command in the Product Key menu and press “OK” Button.7. Select View -> NAND Program (8051) and enter the following Menu. In the Menu, select the files need as bellow, then press “program” button.
Prepare stage – 1.Maldives-PM51-Prepare.txt
DRAM script-2Munich-DDR3-32-MIU0-1-1600-17x17.txt
Tool bin File – 3 PM51-Maldives.bin
Rom Boot Bin File – 4.RomBoot.bin
Trigger stage – 5.Maldives-PM51-Trigger.txt

8. After program successfully, disconnect the AC plug, put the upgrade file the USB stick and plug the usb stick in the main board, connect the tool (such as SecureCRT) which you used to get the log with the tv by the uart debug tool.

9. Set the PC cursor in the window which can show the log information and press the Enter button of your PC keyboard, do not release the Enter button and connect the AC power, then you will enter the Mboot of the TV(as the following picture). In the Mboot, you can input some command to set the tv system.

10. Input “cu” command in the Mboot and press Enter, then the TV will start to upgrade.

 For None Secure Chip
1. Connect the Uart debug tool, Disconnect the tool which you used to get log information.
2. Open the MSTV-Tool.exe.
3. Select “Help-> Product Key” and enter Product Key menu, input “prognand” command in the Product Key menu and press “OK” Button.

4. Select View -> NAND Program (ARM/MIPS) and enter the following Menu. In the Menu, select the files need as bellow, then press “program” button.
Prepare stage – 1ARM-Munich-Prepare.txt
DRAM script – 2Munich-DDR3-32-MIU0-1-1600-17x17.txt
Tool bin File – 3-tool.bin
Rom Boot Bin File – 4RomBoot.bin
Trigger stage – 5ARM-Munich-Trigger.txt

5. After program successfully, disconnect the AC plug, put the upgrade file the USB stick and plug the usb stick in the main board, connect the tool (such as SecureCRT) which you used to get the log with the tv by the uart debug tool.

6. Set the PC cursor in the window which can show the log information and press the Enter button of your PC keyboard, do not release the Enter button and connect the AC power, then you will enter the Mboot of the TV (as the following picture). In the Mboot, you can input some command to set the tv system.

7. Input “cu” command in the Mboot and press Enter, then the TV will start to upgrade.