Sunday, January 22, 2023

Samsung HT- BD1255 5.1CH Blu-ray Home Theater System Disassembly, firmware update, region code setting and SMPS schematics for 110 and 220 volts

 

DECK Disassembly & Reassembly

Ass'y Cover

1) Remove 4 Screws 1.
2) Lift up the Ass’y Cover 2 in direction of arrow.


Tray Disc

1) Insert a Screw Driver into Hole 1 and rotate Tray Gear 2 in the direction arrow
“Open”.
2) When the Tray Disc 3 Comes out a little, pull it in the direction arrow “A” by hand.
3) Pull the Tray Disc 3 to disassemble, while simultaneously pushing 2 Stoppers
4 (left, right) in the direction arrow “B”, “C”.


Ass'y P/U:  Deck

1) Remove FFC Cable 1, 2, 3.
2) Remove 4 Screws 4 from the Ass’y P/U Deck 5 and lift it up.


Ass'y Pick Up

1) Remove 1 Screw 1 from the Ass’y Hinge PU 2 and lift it up.
2) Pull Bracket Shaft PU 3 in the Direction of Arrow “A” and Remove Bracket Shaft
PU 3.
3) Lift Up Shaft P/U 4 and Remove the Ass’y Pick Up 5



1)Insert the Shaft P/U 2, 3 into the Ass’y pick up 1.
2) Assemble Bracket Shaft PU 4.
3) Insert the Ass’y Hinge PU 6 Assemble 1 Screw 5

Update methods
There are 3 Update methods
- CD Update
- Ethernet Update
- USB Update (New Feature)
F/W Update Method by CD

1.Insert update CD and close the tray

2. Tray will be opened.
3. Press Yes.

(If the update CD you inserted is a later one than Current Version)

4. Get rid off updare CD from Disk Tray.

5. wait about two to three minutes.

6 when finished, power automatically goes off.

Firmware update via network procedure

 F/W Update by USB

 

1. Insert the USB on the rear panel.

2. Press Yes.  (If USB you inserted has a later one than current version)

4.  wait about 2 to three minutes.

2. 5. When Finished, power automatically goes off

Cold Start Method (Initialize Setup)

This is useful for forgotten Parental Lock password.
2. Press ►| on the front panel for over 5 seconds while ‘no disc’ status.
3. Then, VFD sign: ‘COLD START’
4. System Micom Cold Start
: During Stand-By, just press  on the front panel for
over 5 seconds. Then, Red LED will go out and go on.

Buyer region code setting mehod.

The inserting region code method after replacing the Main PCB

Press the AUX button on the remote control.

Press the Marker button on the remote controller during 4 to 5 seconds.

After step (2), you can see “T-MODE” on the VFD and press
direction button “▼” during T-MODE.
Please remind that “T-MODE” indicator on the VFD is appeared for
a very short time.

After step (3), you can see “TEST - -” on the VFD.
Insert number “3”, “3” to select Region Code.

After step (4), you can see “- -” on the VFD.
Insert the Region Code (Below table) corresponding model with
“0 ~ 9” buttons on the remote control.

Region codes

After step (5), you can see “00 USA” on the VFD.
It means that currently System Micom (MUIC1) program is installed by USA specification

Turn the Power off.


SMPS CIRCUIT DIAGRAM for 110 volt

SMPS CIRCUIT DIAGRAM FOR 220 Volt


JBL PARTY BOX 100 BU Connected Home-How to disassemble, software upgrade and Reset, Schematic diagram, short circuit and thermal protection

 

 JBLPARTYBOX100AM,JBLPARTYBOX100AS,JBLPARTYBOX100CN,JBLPARTYBOX100EU, JBLPARTYBOX100JN,JBLPARTYBOX100IN,JBLPARTYBOX100BR,JBLPARTYBOX100RU

Audio Amplifier Section
Set all additional processing (tone controls, equalizers, audio effects, etc) to native or bypass, Set Unit on Test mode, set digital generator either off if not additionally defined. Output resistive load = 4Ω, 2 channels loaded. All voltage measurements are made with RMS detector,1kHz signal,10Hz~22kHz
BW, unless otherwise specified.

Speaker Output(Aux-in and BT/USB)

Short circuit, overvoltage and thermal protection

Software upgrade and system Reset

Restore factory setting
1. Power on, Hold down<PLAY> and <VOLUME +>keys on the top panel about 10 seconds.
2. Then, the unit will power off, the reset successful.
3. After factory settings restored, the unit will reboot automatically.
Check software Version
1. Power on, the unit is nothing input
No BT connection / No USB play / No AUX IN input.
2. Hold down <BASS BOOST> & <VOLUME - > keys on the top panel about 2 seconds.
3. The unit will voice playback software version.
4. The unit will exit the SW version speech mode automatically.
Software Upgrade via USB
1. Copy the firmware file (XXX.bin) into a USB flash drive.
2. Insert the USB flash drive to the set.
3. Hold down <VOLUME+> and < BT > keys on the top panel about 10 seconds. The right woofer LED will show red.
4. Starting to upgrade, The right woofer LED colour to white. White LED will display the upgrade progress.
5. Then, the unit will power off , the upgrade successful.
6. The unit will reboot automatically.

Disassembly procedures

How to dismantle PCBs

Dismantling of lighting PCBA and speaker drivers

Schematic diagram: Battery charge circuit

Circuit Diagram-MCU+DSP+AMP PCBA

Circuit Diagram-MCU+DSP+AMP PCBA

Power board (SMPS) schematic


Friday, December 30, 2022

Philips Android LCD TVs - 43PUS8585, 50PUS8585, 58PUS8585, 65PUS8585, 70PUS8585 - How to enter the service mode, software update, error codes, Option codes and more

 

Applicable to Philips 43PUS8585, 50PUS8585, 58PUS8585, 65PUS8585, 70PUS8585

Chassis name: TPM20.1E LA.  Platform: MTK5599

Service Modes
The Service Mode feature is split into following parts:
Service Alignment Mode (SAM).
Factory Mode.
Customer Service Mode (CSM). SAM and the Factory mode offer features, which can be used by the Service engineer to repair/align a TV set.
Some features are: Make alignments (e.g. White Tone), reset the error buffer(SAM and Factory Mode).

Display information (“SAM” indication in upper right corner of screen, error buffer, software version, operating hours, options and option codes, sub menus).
The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call centre. In CSM mode, “CSM”, is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to:
Increase the home repair hit rate.
Decrease the number of nuisance calls.
Solved customers’ problem without home visit.
Note: For the new model range, a new remote control (RC) is used with some renamed buttons. This has an impact on the activation of the Service modes.
For instance the old “MENU” button is now called “HOME” (or is indicated by a “house” icon).
Service Alignment Mode (SAM)
Purpose
To modify the NVM.
To display/clear the error code buffer.
To perform alignments.
Specifications
Operation hours counter (maximum five digits displayed).
Software version, error codes, and option settings display.
Error buffer clearing.
Option settings.
Software alignments (White Tone).
NVM Editor.
Set screen mode to full screen (all content is visible).
How to Activate SAM
To activate SAM, use one of the following methods:
Press the following key sequence on the remote control transmitter: “
062596, directly followed by the “INFO/OK” button. Do not allow the display to time out between entries while keying the sequence.
Or via ComPair.
After entering SAM, the following items are displayed, with “SAM” in the upper right corner of the screen to indicate that the television is in Service Alignment Mode.
How to Navigate
In the SAM menu, select menu items with the UP/DOWN keys on the remote control transmitter. The selected item will be indicated. When not all menu items fit on the screen, use the UP/DOWN keys to display the next/previous menu items.
With the “LEFT/RIGHT” keys, it is possible to:

– (De) activate the selected menu item.
– (De) activate the selected sub menu.
– Change the value of the selected menu item.
When you press the MENU button once while in top level SAM, the set will switch to the normal user menu (with the SAM mode still active in the background).
How to Store SAM Settings
To store the settings changed in SAM mode (except the RGB Align settings), leave the top level SAM menu by using the POWER button on the remote control transmitter or the television set. The mentioned exceptions must be stored separately via the STORE button.
How to Exit SAM
Use one of the following methods:
Switch the set to STANDBY by pressing the mains button on the remote control transmitter or the television set.
Via a standard RC-transmitter, key in “00” sequence.
Note: When the TV is switched “off” by a power interrupt while in SAM, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.

SAM mode overview

Remark: Under main menu “NVM editor”, you can use the UP/DOWN keys to view and change the set Type number, the set Production Number or
the 18AC of a part.(The NVM-editor still has the same function as before, alpha-numeric entry.)

Factory mode:
Purpose
To perform extended alignments.
Specifications
Displaying and or changing Panel ID information.
Displaying and or changing Tuner ID information.
Error buffer clearing.
Various software alignment settings.
Test pattern displaying.
Public Broadcasting Service password Reset.
etc.
How to Activate the Factory mode
To activate the Factory mode, use the following method:
Press the following key sequence on the remote control transmitter: from the “menu/home” press “1999”, directly followed by the “Back/Return” button. Do not allow the display to time out between entries while keying the sequence.
After entering the Factory mode, we can see many items displayed, use the UP/DOWN keys to display the next/previous menu items
How to Exit the Factory mode
Select EXIT_FACTORY from the menu and press the “OK” button.
Note: When the TV is switched “off” by a power interrupt, or normal switch to “stand-by” while in the factory mode, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.

Software Upgrading, Error code and Panel Code
Software Upgrading
The following update is for .pkg file.
1. Rename the file to “upgrade_loader.pkg”.
2. Prepare a USB memory (File format: FLAT, Size: 1G~8G).
3. Copy the software to USB flash disk (root directory).
4. Switch off the TV and Insert the USB memory stick that contains the software update files in one of the TV’s USB 2.0 port.
Note: It contains USB3.0 port, if connect on it, the software may can’t be detected.
5. Switch on the TV. The TV will detect the USB memory s tick automatically. Then a window jumps out as below:

6. When the TV software is updated, the TV will turn on again automatically. Remove your USB flash drive.
7. We can enter in CSM or Factory mode to check the current software version.

The following update is for .upg file.
Step 1: Ready for F/W Upgrade
1. Rename the file to “autorun.upg”.
2. Prepare a USB memory (File format: FLAT, Size: 1G~8G).
3. Copy the software to USB flash disk (root directory).
4. Switch on the TV and Insert the USB memory stick that contains the software update files in one of the TV’s USB 2.0 port.
Note the version of this F/W before you change the software file name.

Step 2: F/W Upgrade
1. Press [Settings] > [update software], then Choose [Search for update] in the Settings menu

2. Choose [USB], and then press OK.

3. Choose [Identify], and then press OK

4. .Select the file that you downloaded and press OK

5. Identify the software and choose [Done], then choose [Start] on following step



6.Choos [Update] press OK start the software update.

7. Upgrade in progress

Step 3: Check the SW version
1. After burning software, TV will restart
2. Press “
123654”, enter Customer Service Mode to check if the software version is correct.

Caution: Please make sure that software upgrade is finished before unplug the USB and AC power

Error Code
Introduction
Error codes are required to indicate failures in the TV set. In principle a unique error code is available for every:
Activated (SW) protection.
Failing I2C device.
General I2C error.
The last five errors, stored in the NVM, are shown in the Service menu’s. This is called the error buffer.
The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that
is not yet in the error code buffer, it is displayed at the left side and all other errors shift one position to the right.
An error will be added to the buffer if this error differs from any error in the buffer. The last found error is displayed on the left.
An error with a designated error code never leads to a deadlock situation. It must always be diagnosable (e.g. error buffer via OSD or blinking LED).
In case a failure identified by an error code automatically results in other error codes (cause and effect), only the error code of the MAIN failure is displayed.
How to Read the Error Buffer
You can read the error buffer in following ways:
On screen via the SAM/CSM (if you have a picture).
Example:
– ERROR: 000 000 000 000 000: No errors detected
– ERROR: 013 000 000 000 000: Error code 13 is the last and only detected error
– ERROR: 034 013 000 000 000: Error code 13 was detected first and error code 34 is the last detected (newest) error
Via the blinking LED procedure (when you have no picture).
Error codes overview
In this chassis only “layer 2” error codes are available and point to problems on the SSB. They are triggered by LED blinking
when CSM is activated. Only the following layer 2 errors are defined:

How to Clear the Error Buffer
The error code buffer is cleared in the following cases:
By using the CLEAR command in the SAM menu
By using the CLEAR command in the Factory mode:
By using the following key sequence on the remote control transmitter: “062599” directly followed by the OK button.
If the contents of the error buffer have not changed for 50 hours, the error buffer resets automatically.
Note: If you exit SAM by disconnecting the mains from the television set, the error buffer is not reset.
Set Option Code
Press the following key sequence on a standard RC transmitter: “062598” directly followed by MENU and “xxx”, where “xxx” is a 3 digit decimal value
of the panel type: see column “Set Option Code” in below tab.
After resetting the Display Code, restart the set immediately.

APPLICABLE MODELS

43PUS8505/12

58PUS8535/12

43PUS8535/12

58PUS8545/12

43PUS8545/12

58PUS8555/12

43PUS8555/12

58PUS9005/12

43PUS9235/12

65PUS8505/12

50PUS8505/12

65PUS8505/60

50PUS8505/60

65PUS8505/62

50PUS8505/62

65PUS8535/12

50PUS8535/12

65PUS8545/12

50PUS8545/12

65PUS8555/12

50PUS8555/12

65PUS9435/12

50PUS9005/12

70PUS8505/12

55PUS9435/12

70PUS8535/12

58PUS8505/12

70PUS8545/12

58PUS8505/60

70PUS8555/12

58PUS8505/62

70PUS9005/12

Thursday, December 29, 2022

PDI-P23 TFT 23 inch LCD - How to enter the service mode, white balance checking, schematic diagram, troubleshooting and more

 

LCD Type :Color Active Matrix TFT
Pixel Pitch :0.372 mm(H) x 0.372 mm(V)
Pixel Format :1366x768 Pixels, RGB Stripe
Active Video Area :508.125mm(H) x 285.696mm(V)
Surface treatment :Haze 44% , Hard coating(3H)
Response Time(Typ) :25mS(Typ)
Viewing Angle<CR≥10> : Hor [Left/Right]
 89Deg (Typ) / 89Deg (Typ),
Ver [High(Top)/Low(Bottom)]
89Deg (Type / 89Deg (Typ)
Luminance(Typ) : 450 cd/
(Type)
Contrast Ratio(Typ) : 1200(Type)
Display Color : 16,777,216 Color - True
Back Light : 6 CCFL – U Type

How to enter the service mode

When the EEPROM has been replaced, the SVC data should be restored as the function of individual system and specification.
When the EEPROM has been replaced White Blance Checking.
[ Enter and exit SVC mode ]  Note: into the SVC mode, Initialize with default data.
1) Press 5 Seconds MENU buttons on both TV set and Remote Controller at the same time to get into SVC mode.
2) Press the PR ▲▼ button several times to find SVC Data.
3) Input the corresponding SVC data referring to Table below with the VOL
◀▶ , key.
4) Press TV/AV button to exit SVC mode.

Factory outgoing setting & Initialize with default data (into the SVC mode)

White balance checking WITH DEFAULT FACTORY DATA

Schematic diagram

PCB layout 



Troubleshooting - No Raster

No sound and picture OK

No operation


CIRCUIT DESCRIPTIONS

General Description for 23.01” color TFT LCD TV.
The TFT LCD TV described in the followings is based on a Multi TV system, digital Control display, 23.01" diagonal. The TFT LCD TV is intended to be a finished product, Basically a display device mounted inside an enclosure which will provide the safety Requirements. With the exception of LCD Panel, the display device shall be composed entirely of solid state components.
These components shall have a history of reliable service in identity applications and shall be applied in the circuits.
1. SCALER SECTION.
2. VCT 49xxi SECTION.
3. Video A/D Converter

SCALER SECTION

Device : MST6151
Features: Input supports up to UXGA & 1080P
Panel supports up to SXGA/WXGA
Integrated two-port triple-ADC/PLL
Integrated DVI/HDCP compliant receiver
YUV422 digital video input ports
Dual high-quality scaling engines
Built-in 3-D video de-interlacer
Video-over-graphic PIP
Video-by-graphic split screen
MStarACE advanced picture/color processing engine
Embedded On-screen Display Controller (OSD) engine
Built-in dual-link LVDS transmitter
5-Volt tolerant inputs
Low EMI and power saving features
Supports PWM & GPO controls
208-pin PQFP package
Analog RGB/YPbPr Input Ports
DVI/HDCP Compliant Input Port
Video Input Port
Auto-Configuration/Auto-Detection
Dual High-Performance Scaling Engines
Video Processing & Conversion
On-Screen OSD Controller
 Description
The MST6151 is a high performance and fully integrated graphics processing IC solution for multi-function LCD monitor/TV with resolutions up to SXGA/WXGA. It is configured with an integrated triple-ADC/PLL, an ntegrated DVI/HDCP receiver, a video de-interlacer, two high quality scaling engines, an on-screen display controller, and a built-in output clock generator. By use of external frame buffer, PIP is provided for multimedia applications. It supports de-interlaced full-screen video, video-on-graphic overlay, video-by-graphic split screen, frame rate conversion, and aspect ratio conversion for various video sources. To further reduce system costs, the MST6151 also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.

VCT 49xxi SECTION.

Device : VCT 49xxi
Features : PSSDIP88-1/-2 package
PMQFP144-2 package
Submicron CMOS technology
Low-power standby mode
Single 20.25-MHz reference crystal
8-bit 8051 instruction set compatible CPU
Up to 256 kB on-chip program ROM
WST, PDC, VPS, and WSS acquisition
Closed Caption and V-chip acquisition
Up to 10 pages on-chip teletext memory
Multi-standard QSS IF processing with single SAW
FM Radio and RDS with standard TV tuner
TV-sound demodulation:
Baseband sound processing for loudspeaker channel:
CVBS, S-VHS, YCrCb and RGB inputs
4H adaptive comb filter (PAL/NTSC)
multi-standard color decoder (PAL/NTSC/SECAM)
Nonlinear horizontal scaling “panorama vision”
Luma and chroma transient improvement (LTI, CTI)
Non-linear color space enhancement (NCE)
Dynamic black level expander (BLE)
Scan velocity modulation output
Soft start/stop of H-drive
Vertical angle and bow correction
Average and peak beam current limiter
Nonlinear and dynamic EHT compensation
Black switch off procedure (BSO)
 Description
The VCT 49xxI is an IC family of high-quality singlechip TV processors. Modular design and deep-submicron technology allow the economic integration of features in all classes of singlescan TV sets. The VCT 49xxI family is based on functional blocks contained and approved in existing products like DRX 396xA, MSP 34x5G, VSP 94x7B, DDP 3315C and SDA 55xx.
Each member of the family contains the entire IF, audio, video, display, and deflection processing for 4:3 and 16:9 50/60-Hz mono and stereo TV sets. The integrated microcontroller is supported by a powerful OSD generator with integrated Teletext & CC acquisition including on-chip page memory.

Video A/D Converter

Device:
Features:

MST9883CR.
*Triple ADC with 12 - 140 MHz Sampling Rate
*Integrated line locked PLL generates pixel clock from HSYNC
*Integrated 5-bit pixel clock phase adjustment for precise sample timing  control.

*Integrated clamp with timing generator.
*Integrated Brightness & Contrast controls.
*Integrated precision voltage reference.
*Compatible with VGA through SXGA RGB 
graphics signals, and component TV, DTV and HDTV.

*Pin Compatible with AD9883A.
*Serial port programming interface
.

*Mid-Scale Clamping.
*Fully Sync Processing.
*4:2:2 and 4:4:4 Output Format Mode.
*Color space conversion (RGB to YCbCr).
*Internal pattern generator*
*Sawtooth vertical deflection signals for VSYNC input*
*BT656 output format mode*
*Black and mid-level precision clamp and calibration*
*Please see MST9883C Application Note for details.RGB Graphics Processing.
(A/D Converter). 

Description
Most flat-panel monitors and projectors require a digital graphics input in order to accurately scale and display graphics. The huge installed base of computers with analog video graphics interfaces necessitates the use of a graphics digitizer to re-digitize the analog RGB signal before further processing.
* The MST9883CR is a fully integrated analog interface for digitizing high-resolution RGB graphics signals from PC’s and workstations. With a sampling rate capability of up to 140 MHz, it can accurately support display resolutions up to 1280x1024 (SXGA) at 75 Hz. The clamped input circuits provide sufficient band width to accurately digitize each pixel.
* The MST9883CR provides a high performance highly integrated solution to support the digitization process, including the ADC’s, a voltage reference, a PLL to generate the pixel sampling clock from HSYNC, clamping circuits, and programmable offset and gain circuits to provide brightness and contrast controls.
* When the COAST signal is asserted, the PLL will maintain its output frequency when HSYNC pulses are absent, such as during the VSYNC period in some systems.
* A 32-step programmable phase adjustment control (0-360 deg) is provided for the pixel sampling clock to adjust for the difference between the HSYNC edge and RGB pixel edge timing.
* The MST9883CR can send output data through one 24-bit port at the pixel clock rate.
* The MST9883CR can also support RGB to YCbCr conversion.
* The MST9883CR has internal programmable pattern generator for testing.
* The MST9883CR can accept either standard TTL, CMOS levels or sawtooth vertical deflection signals for VSYNC input.