Funai LH7 M22B LCD TV – Service mode, Initiliaze, Purity check mode, Full schematic diagram

 Funai 22″ COLOR LCD TELEVISION LH7-M22BB

This is for the LH7-M22BB (A9372EP) model.
For the LH7-M22BB (A9372EP) model, the letter (A9372EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number.

Serial number label

Electrical adjustments

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed.  Also, do not attempt these adjustments unless the proper equipment is available.

Service mode

To enter into the service mode, you have to make a service remote control, out of supplied remote control.

How to make the Service remote control unit.

Cut “A” portion of the attached remote control unit as shown in Fig.

How to set up the service mode.

Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit as shown.

Purity Check Mode

This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time pressing [7] button on the service remote control unit, the display changes as follows.

“When entering this mode, the default setting is White mode”

VCOM Adjustment

Operate the unit for more than 20 minutes.
2. Set the color analyzer and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. Press [3] button on the service remote control unit.
5. Press [P- UP / DN ] buttons on the service remote control unit so that the color analyzer value becomes minimum.

Auto Calibration [Component]
Purpose: To bring the color adjustment of each component into standard alignment.
Symptom of Maladjustment: If this adjustment is incorrect, component signals do not reproduce the corresponding color.
1. Input 720P 100% Color Bar signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
4. To start auto adjustment, press [P-UP ] button on the service remote control unit.
- In the auto adjustment mode, “Calibration Check” appears on the screen.
- Upon completion, “OK” appears on the screen.

Auto Calibration [PC]
Purpose: To bring the color adjustment of PC into standard alignment.
Symptom of Misadjustment: If this adjustment is incorrect, PC signals do not reproduce the corresponding color.
1. Input SVGA 100% White signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [5] button on the service remote control unit.
4. To start auto adjustment, press [P-UP ] button on the service remote control unit.
- In the auto adjustment mode, “Calibration Check” appears on the screen.
- Upon completion, “OK” appears on the screen.

The following adjustment normally are not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation.

White Balance Adjustment [Video/Component/PC]
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.

1. Operate the unit for more than 20 minutes.
2. [VIDEO input]
Input the White Raster (70%=70IRE, 40%=40IRE).
[Component input]
Input the 720P White Raster (70%=70IRE, 40%=40IRE).
[PC input]
Input the SVGA White Raster (70%=70IRE, 40%=40IRE).

3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown below.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.

4. Enter the Service mode. Press [Vol -] button on the service remote control unit and select “C/D” mode.
5. [CUTOFF]
Press [3] button to select “COB” for Blue Cutoff adjustment. Press [1] button to select “COR” for Red Cutoff adjustment.
[DRIVE]
Press [6] button to select “DB” for Blue Drive adjustment. Press [4] button to select “DR” for Red Drive adjustment.
6. In each color mode, press [P-UP / DN ] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 9200°K (x= 0.286 / y= 0.295 ±0.005).
8. Change the video signal input in step 2 and repeat from step 3.

HOW TO INITIALIZE THE LCD TELEVISION

1. Turn the power on.
2. To enter the service mode, press the service button on the service remote control unit.
- To cancel the service mode, Press [POWER ] button on the remote control unit.
3. Press [ i ] button on the service remote control unit to initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is complete.

Schematic diagrams

Wiring diagram

Sony KV21LT1B FD Trinitron CRT TV – service mode, circuit adjustments and schematic diagram

 

KV-21LT1B RM-887 French SCC-Q54C-A, KV-21LT1E RM-887 Spanish SCC-Q53C-A, KV-21LT1K RM-887 OIRT SCC-Q51C-A, KV-21LT1U RM-887 UK SCC-Q52C-A, KV-21FT2K RM-887 OIRT SCC-Q51E-A

The identification of errors within the FE-2 chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with a continuous flashing LED) and then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number will be displayed through the LED (Series of flashes which must be counted) See table 1., non fatal errors are reported using this method.  Each time the software detects an error it is stored within the NVM. See Table 2.

How to enter into Table 2

1. Turn on the main power switch of the TV set and enter into the ‘Standby Mode’.
2. Press the following sequence of buttons on the Remote Commander.

CIRCUIT ADJUSTMENTS

Service adjustments to this model can be performed using the supplied Remote Commander RM-887.

How to enter into the Service Mode

1. Turn on the main power switch and enter into the stand-by mode.
2. Press the following sequence of buttons on the Remote Commander.

‘TT—’ will appear in the upper right corner of the screen.  Other status information will also be displayed.

3. Press ‘MENU’ on the remote commander to obtain the following menu on the screen.

4. Move to the corresponding adjustment item using the up or down arrow buttons on the Remote Commander.
5. Press the right arrow button to enter into the required menu item.
6. Press the ‘Menu’ button on the Remote Commander to quit the Service Mode when all adjustments have been completed.

Note
• Before performing any adjustments ensure that the correct model has been selected in the ‘Model Setting’ menu.
• After carrying out the service adjustments, to prevent the customer accessing the ‘Service Menu’ switch the TV set OFF and then ON.

Sub Brightness Adjustment

1. Input a Monoscope pattern.
2. Press ‘TEST’ ‘TEST’ 13 on the Remote Commander.
3. Adjust the ‘Sub-Brightness’ data so that there is barely a difference between the 0 IRE and 10 IRE signal levels.

Sub Contrast Adjustment

1. Input a video signal that contains a small 100% white area on a black background.
2. Connect an digital voltmeter to Pin 10 of J701 [C Board].
3. Adjust the Sub-Contrast [‘TT11’] to obtain a voltage of 95 +0,- 5V

Sub Color Adjustment

1. Receive a PAL color bar signal.
2. Connect an oscilloscope to Pin 3 of CN504 [A Board].
3. Enter into the ‘Service’ service menu.
4. Adjust the ‘Sub Color’ data so that the Cyan, Magenta and Blue color bars are of equal levels as indicated below.
Note:
Ensure that no signal is applied to the Antenna socket while carrying out the following IF adjustments.

Tuner AGC Adjustment

1. Set the “AGC adjust” register value: 

• For destination France set the value to 6.
• All other destinations set the value to 0

2. Receive a signal of 64dBuV / 75 ohm terminated [62dBuV / 75 ohms for B model] via the tuner antenna socket.
3. Connect a voltmeter to pin1 of TU101 [print side of A Board] or to the AGC pin of CN001 [mount side of A Board].
4. Confirm that the AGC voltage is 3.5volts +/- 0.3volts.
5. If adjustment is required, enter into the ‘Test Menu’.
6. Select the ‘AGC Adjust’ menu item.
7. Adjust the data using the left and right arrow buttons on the Remote Commander to obtain a voltage of 3.5V +/- 0.3V

Deflection System Adjustment

1. Enter into the ‘Geometry’ service menu.
2. Select and adjust each item in order to obtain the optimum image.

TEST MODE 2:

Is available by pressing the ‘TEST’ button twice, OSD ‘TT’ appears.
The functions described below are available by selecting the two numbers. To release the ‘Test mode 2’, press 00, 10, 20 ... twice or switch the TV set into Stand-by mode. In ‘TT Menu’ mode, it is possible to remove the Menu from the screen by pressing the Speaker Off button once. Pressing the Speaker OFF button a second time will cause the Menu to reappear. The function is kept even when the menu is not displayed on screen.

PWB & Circuit diagrams

Mitsubishi DLP projection HDTV-How to enter the service mode, Reset, self Diagonostic blinking codes, SMPS schmatics

 

Mitsubishi MODELS: WD-60C10 - WD-65C10 - WD-73C10 - WD-60638 - WD-65638 - WD-73638 - WD-60738 - WD-65738 - WD-73738 - WD-82738 - WD-65838 - WD-73838 - WD-82838

SERVICE PROCEDURES

Service Procedures differ between the V43C & V43 and the V43+ & V43++ chassis. Be sure to follow the procedure indicated for the model being serviced.

OPTION MENU
1. Press the <MENU> button on the remote control.
2. Press the buttons <2-4-7-0>. The screen will display the Option Menu.
3. The Option Menu for the V43C & V43 differs from the V43+ & V43++ chassis. V43C & V43 Option Menu items are included in the Service Menu. See below.

SERVICE LEVEL INITIALIZATION
Service Level Initialization is used to restore all customer menu, video and audio settings to the original factory default condition.
1. Enter the Option Menu <MENU><2-4-7-0>
2. V43C & V43 Chassis select “2. Reset All Settings” and <ENTER>. Then confirm “YES” <ENTER>..
V43+ & V43++ Chassis select “Initialize” and <ENTER>.

DIGITAL SIGNAL INFORMATION
Information on the currently selected digital channel can be displayed on screen.
1. Enter the Option / Service Menu <MENU><2-4-7-0>

2. V43C & V43 Chassis select “Information” and <ENTER>.
V43+ & V43++ Chassis select “Digital Signal Strength” and <ENTER>

RESET / INITIALIZATION

Many symptoms that are customer generated, intermittent or cannot be verified can be resolved by using the various Reset and Initialization options. Before visiting the customer’s home ask the customer to 1st perform a System Reset by pressing the <POWER> button on the front panel and holding it for 8 seconds. If this does not resolve the issue, they can perform an A/V Reset by pressing the <INPUT> + <VOL Dn> buttons on the front panel at the same time and holding for 10 seconds. Then, if necessary, perform a user level Initialization by pressing <MENU><1-2-3> <ENTER> with the
remote. The customer should be made aware when settings and/or options will be reset. For more information, see the chart below.

LED INDICATIONS AND SELF DIAGNOSTICS

The front panel Status LED provides an indication of the set’s operation and the possible cause of a malfunction.

SELF DIAGNOSTICS
A blinking red and yellow Status LED will indicate an Error Code that can help determine the cause of a circuit failure.
The number of Red blinks indicates the value of the MSD (tens digit) of the Error Code.

 The number of Yellow blinks indicates the value of the LSD (ones digit) of the Error Code.

To perform a System Reset, press and hold the Power button for 10 seconds. Or, unplug the set for 10 seconds then restore power.

Error codes

ERROR CODE LOG (V43+ & V43++)
The Error Code Log may be helpful to retrieve the code for an error that occurred in the past.

Error Code Log Definitions
• PAGE - Current page number
• CURRENT TIME - total hours of operational use.
• USAGE TIME - usage hours when the error occurred.
• CODE - the specific Error Code that occurred.
• STATUS: HAPPENED - Indicates an error was recorded.

Press <CANCEL> to erase the Log.

NOTE: The Error Code Log is intended as a reference tool and is not meant to be used as a final determination of a defective part.

SOUND PROJECTOR TRANSDUCER TEST (V43++)
This procedure will test will each of the TV’s speakers individually using an internal tone generator.
1. Press the <MENU> button on the remote control. The Customer Menu will appear.
2. Press the <2-4-5-7> buttons. The Service Menu will appear.
3. Press the <0> button. The Data Transfer & Geometry Menu will appear. See below.

4. Use the <TS> buttons to select “SOUND PROJECTOR TRANSDUCER TEST” and press <ENTER>. The Sound Projector Transducer Test Menu will be displayed. A tone will automatically cycle from one speaker to the next as indicated on screen. Follow the instructions to manually cycle the tone.
5. Press <EXIT> to exit.

SERVICE MENU

The Service Menu is used for all service adjustments.
Service adjustments can only be performed using the remote control.

Activating the Service Menu
V43C & V43
For the V43C & V43 chassis, all service functions except Data Transfer are included under the Service Menu.
1. Press the <MENU> button on a remote control. (The Customer Menu will appear.)
2. Press the buttons <2-4-7-0>. (The Service Menu will appear.)

V43+ & V43++
1. Press the <MENU> button on a remote control. (The Customer Menu will appear.)
2. Press the buttons <2-4-5-7>. (The Service Menu will appear.)

Test Pattern Activation
V43C & V43
1. When in the Service Menu select “Test Picture” <ENTER> <0,1,2,3,4 or 5> to select specific patterns.
2. When in the Service Menu select “Calibration” <ENTER> <1-1-1-1>. Use <CH U> and <CH V> to toggle between patterns.

V43+ & V43++
1. When in the Service Menu, press Play  to activate the internal test patterns (no indication will be displayed initially). Use FWD  and RWD  to toggle between patterns.
2. Press Play  a second time and use FWD  and RWD  to access additional patterns.
3. Press Play  again to toggle back to the previous patterns.

Adjustment Overview—Specific adjustment procedures follow.
V43C & V43
When in the Service Menu select “Calibration” <ENTER> followed by the code for the adjustment desired.

V43+ & V43++
1. When in the Service Menu use the <VIDEO> button to toggle to adjustment desired indicated by the number and abbreviation displayed on screen.

2. For Geometry, from the Service Menu press <0> and select “Manual Geometry Alignment” <ENTER>.

Adjusting Data
After selecting an adjustment item, use the Navigation arrows or other buttons indicated in the adjustment procedure to perform the adjustment.

Saving Data
Press <ENTER> to save the adjustment data.
V43C & V43, The Status LED will turn red for about 1 second.
V43+ & V43++, The menu display will turn red for approximately one second.
Note: If the circuit adjustment mode is terminated without pressing <ENTER>, changes in adjustment data are not saved.

Exiting the Service Menu
Press <EXIT> to quit.

Power board [SMPS] schematic diagrams

V43/V43C POWER

V43+ power

V43++ Power

Sinotec TV full schematic, Vestel 17IPS61 24 inch LCD TV and 40PFL3606 POWER SUPPLY schematic diagrams

 Vestel 17IPS61-4P (24 inch LCD TV integrated power supply schematic

Sinotec TV schematic – Full

LA76930, LA4267, LA78040, KA5Q0565RT (STR)

Power supply schematic 40PFL 3606,  HS01G, NCP1207, PS2771, PS510, OZ 9977, F6N80 (SWITCHINT OUT FET)

How to disassemble LG DM19D mechanism – LG OK75

 LG DM19D - LG OK75 - mechanism disassemble procedure

Cover Top
1) Remove the 2 screws (S1).
2) Remove the Cover Top.

Clamp Assembly
1) Place the Clamp Assembly as Figure B.
2) Bending the Cover Top in direction of arrow (2) as Figure B.
3) Separate the Clamp Assembly from the
Cover Top.

 Plate
1) Turn the Plate to a counterclockwise direction
and then lift up the Plate.
2) Remove the Plate.
Magnet
Remove the Magnet.
Clamp
Remove the Clamp.

Tray Disc
1) Insert and push a flat-head screwdriver in the Emergency eject hole (H1) at the right side, so that the Tray Disc is ejected about 15 ~ 20 mm.
2) Pull the Tray Disc until it is locked.

3) Grasp the both sides of the Tray Disc and lift it up as Figure D, and then pull the Tray Disc until it is separated from the MD Sub Assembly completely.

Pick Up Assembly
1) Detach the Gasket Tape.
2) Disconnect the wires (BLK, RED, BRN, ORN) from the Deck PCB Assembly by desoldering.
3) Remove the 4 screws (S2).
4) Disconnect the FFC Cable from the Pick Up Assembly.
5) Remove the 4 Rubber Dampers.

Base Up-Down
Unlock the Locking Tab (L2) in direction of arrow and then lift up the Base Up/Down to separate it from the Base Main.

• When reassembling move the Guide in direction of arrow (A) until it is positioned as Figure G-1.
• When reassembling insert the (B) portion of the Base Up/Down in the (C) portion of the Guide as Figure G-2.
• When reassembling insert the (D) portion of the Base Up/Down in the Hole (H2) of the Base Main as Figure G-3.

Belt Loading
Remove the Belt Loading.
Gear Pulley
Unlock the Locking Tab (L3) in direction of arrow and then separate the Gear Pulley from the Base Main.
Gear Loading
Remove the Gear Loading.
Guide
1) Move the Guide in direction of arrow (A) as Figure H-1.
2) Separate the Guide from the Base Main.

Deck PCB Assembly
1) Disconnect the wires (RED, BK) form the Deck PCB Assembly by desoldering.
2) Remove the 1 screw (S3).
3) Separate the Deck PCB Assembly from the Base Main.
Motor Assembly
Unlock the Locking Tab (L4) in direction of
arrow and then separate the Motor Assembly
from the Base Main.
FFC Cable
Remove the FFC Cable.

DM19D Exploded view