SHIVAKI STV2961PF - CRT TV - SCHEMATIC [Circuit Diagram]

Shivaki CRT TV _ STV2961PF _ Circuit Diagram [Full]

Circuit Diagram [Click on the Schematic to Zoom In]

How to enter Service Mode – Sanyo LCD-27XL2 - LCD-27XL2B – LCD TV – Option Setting

Sanyo LCD TV _ Option setting_Service Mode_Memory IC initialize_Service mode adjustment procedure

OPTION SETTING

After replacing Memory IC (IC801)
The memory IC (IC802) stores the option data of TV set and service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be programmed to the following settings.

How to enter the Option Setting Mode
Press and hold the MUTE button on the remote control and press the CHANNEL DOWN (P▼) button on the front control panel of the TV. The option window will appear on the screen.

How to make the Option Setting
Select desired option item by pressing the CHANNEL UP or DOWN button.
To switch the option mode, use the VOLUME + or - button.
The data which is set in the option mode is stored into the memory IC automatically.

To exit from the Option Mode
Press the MENU button or turn off the TV set by pressing the Power ON/OFF button.

How to enter the Service Menu
Press and hold the SOUND button of the remote control and press the CHANNEL DOWN (P▼) button on the front control panel of the TV, 

The Main menu of service mode will be displayed.

{Do not attempt to adjust service adjustments not listed otherwise it may cause loss of performance and for correct operation.}

How to select the service section and service item and change data value
To select Service Section: Press the Cursor ▲/▼  button on the remote control hand set, and press the VOLUME + button to enter the Sub menu.

To change data value: Select service item by pressing the Cursor  ▲/▼ and change data value by pressing the VOLUME + or - button.  (To return to the Main menu, press the MENU button.)

To exit from the Service Menu
Press the MENU button repeatedly or turn off the TV set by pressing the Power ON/OFF button.

How to Initialize the Memory IC
To initialize the Memory IC (IC802), press and hold the IMAGE button on the remote control, then press the CHANNEL DOWN button on the front panel of the TV set and then turn the Mains switch off and on. The initialization is now completed.  When initialized the memory IC and all of the setting data (option data and service adjustment data) stored in the IC are reset to the default value. It is necessary to set the option settings and readjust the service adjustments listed above.

This TV set has a built-in power supply protection circuit.  It is provided to protect the TV set in case of a power supply circuit malfunctions. When something abnormality occurs during TV reception, the TV set goes to the stand-by mode.  When operating the Protection Circuit, the Stand-by and Power Indicator will blink.

Releasing the protective circuit and restoring power supply
To release the protective circuit and restore power supply, disconnect the AC cord for a short time. This will work only if the power supply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot be restored and the circuit will have to be repaired.

SANYO LCD27XL2 - LCD27XL2B LCD Television (Argentina / Brazil) - SMPS SCHEMATIC

Power Supply Regulator Circuit Diagram _ Sanyo LCD27XL2 - LCD27XL2B LCD Television.

SMPS SCHEMATIC

CLICK ON THE SCHEMATIC TO ZOOM IN

PWB Parts side & Solder side

LG1426 - 14 Inch CTV - SCHEMATIC [Circuit Diagram]

USED ICs - HEF4053_M37160_M61260 / M61264_LA7840_AN7522_AT24C04

CIRCUIT DIAGRAM [SCHEMATIC-Full]

CLICK ON THE SCHEMATIC TO MAGNIFY

HOW TO DO A HARD RESET – FAULTS AND REMEDIES - PANASONIC PLASMA TVs

TH65PZ850U, TH58PZ850U, TH50PZ850U, TH46PZ850U, TH58PZ800U, TH50PZ800U, TH46PZ800U, TH42PZ800U, TH50PZ80U, TH46PZ80U, TH42PZ80U, TH50PX80U, TH42PX80U, TH50PZ85U, TH46PZ85U, TH42PZ85U.

How to perform a hard reset to Panasonic Plasma TV

 Normally; a hard reset can be done by unplugging the TV from AC mains wall socket, and re-plug it back after some minutes or hours.

 To   perform HARD RESET of Plasma TV unit by pressing & holding VOL DOWN (-) on unit and MENU button on remote at the same time for about 3 seconds.  This must be done if you replace the main board of the TV.  All new A boards supplied from factory needs to be initialized.  

 After the main board replacement. once AC power cord is plugged in, unit will turn on by itself. Depends on factory settings, unit will either display Video, Component or Tuner icon. After few seconds, screen will change to service mode automatically.  NOTE: Since unit is in service mode, only buttons 1, 2, 3 or 4 on remote are working (rest of buttons are nonfunctional).  After hard reset, confirm if Plasma TV powers ON in user mode and check overall functionality.

FAULTS TO 46" PLASMA TVs

* The unit shuts down and power LED blinks 10 times.

> Shorted Q409 & open PR401.  Replace Q409 & PR401

Speaker box is making rattling sound;  contact with cabinet parts

* Vibration noise from left or right speaker.  Speaker box is making direct contact with cabinet parts.

> Installing mounting screw in the center of speaker box prevents from touching the cabinet parts and minimizes the risk of vibration noise.  Install screw, part number THEL049 to both speaker boxes as shown here.  Repeat the same for left speaker box.

Relay clicks then TV shuts down with power LED 10 blinks

* When AC cord plugged in, relay clicks then TV shuts down with power LED 10 blinks.

> No Vin supply to IC520 (power control IC) due to open R712 & shorted C527.

Replace R712 & C527

R712: ERJ6GEYJ4R7

C527: ECJ3YB1E475K

Picture disappears after a few minutes, but sound is OK.

* Low Ldo_5V supply to IC9800 (DC to DC Converter) due to leaky D9801.  

> Replace D9801 on the D board.

D9801:  B0JCDD000002

Shuts down with power LED 10 blinks.

* Missing 395Vdc output due to shorted Q412 & Q413 and open PR401.

> Replace Q412, Q413, PR401 & check/replace Q408 and Q409.  Note: Always confirm condition of Q408 & Q409, in some cases could be shorted.

Q412 & Q413: B1DEGQ000070

Q408 & Q409:  B1DHCD000034

PR401: K5Y502BA0001

SONY CAR AUDIO WIRING Details & Sockets

Sony Car Stereos _ XR-7300, XR-7200, XR-7201, XR-7202, XR-7400,  XR-3700RDS, XR-3750, XR-3690RDS, XR-6700RDS, XR-C700, MDX-U1RDS, XR-7082 _  & Others - Wiring Details

SONY XR-7300, XR-7200, XR-7201, XR-7202, XR-7400 

CDX-R79VF

SONY XR-502

SONY XR-7082

SONY XR-3700RDS, XR-3750, XR-3690RDS, XR-6700RDS, XR-C700

SONY XR-7042, XR-4403

SONY CDX-5072

SONY MDX-U1RDS

SONY XR-C210, XR-C214

SONY XR-4252

Click on the tables to Magnify

LG CF20F - SCHEMATIC (CIRCUIT DIAGRAM) - 20 inch CRT TV

LG 20" CRT TV _ CF20F - CIRCUIT DIAGRAM

SCHEMATIC - FULL

CLICK ON THE SCHEMATIC TO ZOOM IN

50 inch SAMSUNG PLASMA TV - FAILURE SYMPTOMS - Screen-shots

PN50C450B1DXZA – Samsung Plasma display – Failure Symptoms

“Y” board failure symptoms

These examples show Y board errors, because the Y electrodes run horizontally, errors can often be seen across the screen. 2010 & 2011 y board errors will be detected by the logic board and often create a High Voltage Power down [Vs On to Off], condition.

When failure exists on either the Y board or the Y buffer boards, be sure to replace both assemblies.  A failure on either board can create a failure on both the assemblies.

Y buffer board failure symptoms

X board failure examples

In the left screen, the sustain signal from the X board is low or missing.  For 2009 models, and older; verify the operation of the X board by disconnecting the power supply cable to the X board.  If the other boards are working the picture will be dark.  If the X board power or the Y board power is removed, however, on 2010 or 2011 models, an error will be detected and the Vs supply from the SMPS will be turned Off by the logic board.  A black screen as seen on the right here will be the result.

Logic board & logic buffer board failure examples

The panel illuminated, but displays with incorrect noisy video.

The panel illuminated, display is normal, except for area of Logic Buffer Board failure

X board & Main board failure symptoms

If the Ve initialize signal is low or missing creating image retention.  No Erasing.  Troubleshoot the X board by verifying that the Ve voltage is correct with the label on the panel.

The main board errors are similar to logic errors but the problem can be on a single source such as tuner.  If the Menu also shows the defect the main board is suspected.

Boards_Location