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SONY WEGA TRINITRON - KV DA322M66 – KV DA322M64 – RESET – SMPS and DEFLECTION SCHEMATIC

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KV DA322M66 – KV DA322M64– RESET – SMPS and DEFLECTION SCHEMATIC _ Picture Distortion Adjustments _ SONY Wega Trintron Flat TV
RESET PROCEDURE
If you faces some setting problem that cannot be solved, using the "RESET" function some items will be reset to its original setting or factory setting (shipping condition).
How to Operate
The following is to show on how to access to the "RESET" Function
User selection = press '
WEGA GATE' => select =>'SETTING' => go to 'SETUP' page => select 'FACTORY SETTINGS' => select 'YES'.
Sequential to the resetting operation, TV set would shut down once and automatically turn on again. The power-off duration is expected to be about 500msec. Initial Setup Menu is displayed.  As a result, some items will be reset to their initial conditions (shipment condition) whereas some others remain at the last user selection.
ITEMS THAT REMAIN AT THE LAST USER SELECTION
Program No., PICTURE POSITION (included PICTURE ROTATION and PICTURE V-POSITION), OSD Language, Fine tuning, TV System, Skip, Program label, Program sorting, Video label.
ADJUSTMENT TO A1 BOARD, AFTER MEMORY IC [IC003] REPLACEMENT
1Enter to Service Mode. {With the unit on standby >  [DISPLAY] => 5 => [VOL(+)] => [POWER}
2
Press commander buttons 5 and - (Data Initialize), and 2 and - (Data Copy) to initialize the data.
3
Call each item number and check if the respective screen shows the normal picture.  In cases where items are not well adjusted, rectify the items with fine adjustment.  Write the data per each item number [Muting + 0)
4
Select item numbers “OPB00” (OP1), “OPB01” (OP2) and respectively set the bit per model with command buttons 3 and 6.
5
Press commander buttons 8 and - (Test Normal) to return to the data that was set on the shipment from the factory. (This will also cancel Service Mode.)
PICTURE DISTORTION ADJUSTMENTS
D-BOARD [Power Supply & Deflection] schematic (Circuit Diagram)
CLICK ON THE PICTURES TO ZOOM IN


LG 55LB630V - LG 55LB631V LCD TV - TROUBLESHOOTING - No Power _ No Audio

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55LB630V - 55LB631V _ LG LCD TV _ Troubleshooting _ No Power _ No Sound [picture OK] _ Display Error
NO POWER
Check power input voltage and ST-BY 3.5V
Checking method when power is ON [Check Power On pin is HIGH]
Power error _Off when on, off whiling viewing [POWER OFF MODE checking method]
* Press the IN-START button of the remote controller for adjustment
* Check the entry into adjustment item 3
AUDIO ERROR No audio/Normal video-3 [Checking method in menu when there is no audio]
* Press the Setting button on the remote controller
* Select the Sound function of the Menu
* Select the Sound Out
* Select TV Speaker
Voltage and speaker checking method when there is no audio
> Check the contact condition of or 24V connector of Main Board
> Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and check the connector)
> Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal.
REMOTE CONTROLLER OPERATION CHECKING [Function error_ No response in remote controller, key error]
* Check IR cable condition between IR & Main board
* Check the St-by 3.5V on the terminal 16.
When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all.
COLOR ERROR Display has error especially color [V-Com checking and adjust method]
* Press the ADJ button on the remote controller for adjustment.
* Enter into V-Com of item 14.
* Check and adjust V-Com value.
CLICK ON THE PICTURES TO MAGNIFY

MICROLAB M800 - MICROLAB SOLO1MK2 - SCHEMATIC - COMPUTER SPEAKER SYSTEMS

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MICROLAB COMPUTER SPEAKER SYSTEMS M800 & SOLO1MK2 _ Used ICs  M800 2.1 - TDA2030_TDA4558  SOLO1MK2 - TDA4558 _ TDA7265
SCHEMATIC [Circuit Diagram]
CLICK ON THE PICTURES TO MAGNIFY

A6652 - MICROLAB COMPUTER SPEAKER SYSTEM - SCHEMATIC

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MICROLAB A-6652 _ Computer Speaker System Circuit Diagram  _ Used ICs - VFD 10-BT-245GNKP (Display Module) – PT6311 (Display Drive) – SN1604 (System control) – 24C01 (System Memory) – 4558 (Pre amp) – LM4731 ( Dual Power Amp) – PT2322 (Signal Processor Control)
FRONT CONTROL & DISPLAY CIRCUIT
SIGNAL PROCESSOR CIRCUIT
POWER AMPLIFIER CIRCUIT
CLICK ON THE CIRCUITS TO ZOOM IN

TOSHIBA 19AV605PR - 19 Inch COMPUTER MONITOR SCHEMATIC - SMPS and BACK LIGHT

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19AV605 PR TOSHIBA COLOR MONITOR SMPS and BACK LIGHT INVERTER SCHEMATIC (Circuit Diagram)  Used ICs AO4620_OZ9938GN_LD7575A_STP10NK70ZFP_PC123
SMPS CIRCUIT DIAGRAM
BACK LIGHT INVERTER CIRCUIT DIAGRAM
CLICK ON THE SCHEMATICS TO MAGNIFY

PHILIPS 21PT138A-94R – Troubleshooting - FROM SERVICE TABLE - Today

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Vertical Scan output section circuit faultPhilips 21PT138A/94R CRT TV
  Fault:  The screen narrowed [at about 7 inches in height at the center] (See the picture )  A horizontal line across the center of the screen and it expanded vertically to both top and bottom.  Lack of vertical scan pulse amplitudedetected with Fluke scope-meter.
Vertical scan output IC used is TDA3653.  PT138A  Chassis.  Normally it seems to be a vertical scan output IC fault; but was not.
  Low input voltage measured at Pin-9 of this IC.  Instead of 26.0VDC, an extreme low voltage of 8.9VDC measured.  Checked all the related components, including capacitors and resistors.   On checking, the carbon film resistor [used as a fuse resistor of 1 oHms measured a value of about 50 oHms.  That was the fault.  Replaced that resistor, checked OK.
  Resistor 3449, that connected between the coil 5449 which in turn connected to pin-6 of Line Output Transformer [LOT]; which generates the 26VDC to vertical scan output section circuit.
 It took around 25 minutes to locate the exact fault location and to pinpoint the  damaged component on circuit board.
Troubleshooting procedure that I've done according to my service experience.  It might be different to an other person.
  As the set has light at screen, and there is no unusual Hissing or cracking sound; it is clear that its horizontal section circuit is OK.  Otherwise, there will be no symptom of light.  Here the screen do not fill vertically; but it do fill horizontally; as you can see the attached photo of the faulty screen below. 
Something wrong with the vertical scan out section circuit.  Might be IC damage, loose solder terminal/s or any other reason.
  With this set, vertical scan out section circuit is built around the IC TDA3653C.  It has 9 solder terminals.  Pin-9 is its main supply input, pin-5 is the vertical scan output and pin-4 is the Ground for vertical scan output section fabricated inside the IC.
  I've checked all the solder terminals at the vertical scan output section  circuit for any loose solder.  All found OK.
Powered ON the set. Measured the voltage at the IC pins.
 Measured the input voltage at pin-9 of the IC.  Found very low; at about 9VDC or so, and it was fluctuating too.  There should be around a steady 26VDC normally.
Suspected a short circuit within the IC.
Unplugged the set from AC mains.
 Measured the resistance[multi-meter set to measure Ohms]; between pin-4 [GND] of the IC to pin 9 [+] voltage input.
No short circuit symptom.
 Reversed the meter prod polarity, and measured it again.  No problem at all.  I used an analogue multi-meter [Sanwa YX360TRF] to detect the fault.
 Sucked out all the solder at pin-9 of the IC; using a solder sucker; to isolate the connection to that pin from the rest of the circuit.
Switched ON the set.
 Measured the voltage at theprint foil of pin-9 of the IC.  Was found OK. 26.8VDC now.
Disconnected AC.
Soldered the pin-9 again to circuit.
 Switched ON the set.  The voltage dropped to 9V again.  Something wrong with the 26V supply line.  When it loads, the voltage drops.
Concentrated to that supply line.
 This 26V is generated by one among the winding at the LOT, at pin number 6 of it.
Checked the rectifier diode used there.  Was found OK.  No reverse leak at all; even at MegOhm range.
Checked the resistor connected in series.  Measured an abnormal value.  More than 50oHms. 
Referred the schematic.  It was marked as 1oHm 2W; Carbon Film [CF] type.
Replaced it with a new one.  Checked OK.
Checked the heating effect of the IC, for an hour use.  No overheating. Picture was perfect without any vertical rolling.  Vertical height and linearity too was perfect.
That was all.
Voltages at pins of TDA3653; at perfect working condition.
Pin-1 > free
Pin-2 > Ground
Pin-3 > 1.3V
Pin-4 > Ground
Pin-5 > 13V
Pin-6 > 26V
Pin-7 > 0V
Pin-8 > 5V
Pin-9 > 26V.
See the photos.
Faulty Screen 
CHASSIS
LOCATION OF THE FAULTY COMPONENT (Marked in Red rectangle)
FAULTY COMPONENT
CLICK ON THE PICTURES TO MAGNIFY

VIDEOCON CTV14TP - Troubleshooting - From The SERVICE TABLE TODAY- Red color predominant screen _ with Retrace Lines

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Red color predominant screen; even to Menu Screen – ABL section control voltage do not change according to the scene brightness changes _ thick horizontal bars; rolling downward and upward _ thin retrace lines along with picture – VIDEOCON- CTV14TP
Fault condition 
  ABL[Automatic Brightness Limiter] voltage seems to be almost constant.  The picture seems to be smeared, with excess red tone, retrace lines even with menu screen.  Instead of blue back-ground, it displays RED. Checked all the components at the ABL section, referring to its circuit diagram.  A zener diode connected to the ABL track at the CRT base card was found leaky.  Changed the Zener diode [9.1V].  ABL voltage became normal, and began to change according to the intensity of the picture brightness, but, the red color was excess.  
  Checked all the thee cathode voltage at CRT base pins.  The voltage to red-cathode was found abnormal [much less – with a difference of 25V with respect to other two [blue & green] cathodes.  Checked all the video output transistors at the CRT base card.  Three of them.  All are found OK, with meter check.  De-soldered out the transistor [red drive] and checked it out of circuit.  There was a slight short detected between collector and base to that transistor, measuring it at MegOhm range.  Desoldered out the blue drive transistor from the CRT base card, and checked it.  The same number, but did not show any leak when measured at the same MegOhm range.
  Replaced the Red drive transistor with a new one of same number, and inserted the blue drive transistor in place, and switched  ON the set.
Measured all the three cathode voltages; and found normal.  The color too has displayed well.
Faulty displays before repair.  Color of the picture changes as the screen changes; due to absense of  ABL control voltage.
After repair
These pictures might have some imperfections as all of it has been shot by my Mobile phone
Click on the pictures to Magnify

SAMSUNG CZ 21V5MJ - TROUBLESHOOTING - From My SERVICE TABLE TODAY - Damaged D2499 Horizontal Output Transistor

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DAMAGED D2499_Horizontal Output Transistor _ SAMSUNG CZ21V5MJ - Deflection Yoke Fault.
  The set received for repair, in dead condition.  As per information from party, they haven’t used it for a long time; at about 2 years or so; as there was nobody at home.  Might be; because, the set too looks so.  Whatever it may be; let me work with it.
I did plug the set to AC power and switched it ON.  Dead indeed.  But, the green power LED at the front panel of the TV lights up for a moment, and goes OFF.  That was all.  No symptom of software loading or any static EHT effect at the front of the screen.
As the power/standby LED lights up; at least for a moment, means the SMPS section circuit is working normally.
These sets have short circuit protection.  If a direct short circuit occurs at any stage at its main board, the SMPS circuit will shut down automatically.  That is what happening here.  There should be a short circuited component/s anywhere at the circuit board.  Where might it be?
The set gives me no time to measure any voltage points.  It shuts down, as soon as I switched it ON.
Disconnected the set from AC mains.  A meter test done to all suspected components.  Detected a damage with the Horizontal Output transistor.  Collector to Emitter leak [Direct shorted junction].
If this transistor (D2499) should get damaged, there are 4 possible causes. 
* 3k9pF [2000VDC] capacitor. [Free-wheeling capacitor] 
* Horizontal oscillator frequency. 
* Shorted winding inside the LOT  
* Shorted winding in the deflection yoke.
* The 3k9pF capacitor [connected to the collector terminal of the horizontal output transistor to Ground].  Either it might open or the solder terminal loose contact.  Checked it.  No loose contact.  The capacitor showed a value of 4k2pF, with capacitance meter test.  It's OK.
* Frequency of horizontal oscillation.  If this frequency go beyond a specific value, say if it changes very low or high; the horizontal output transistor will get damaged.  The normal frequency is 15.625kHz.  about +/- 2% deviation can be tolerated.  Not too much. 
 When the set receive a transmission, this frequency will get synchronized with the incoming RF signal, as  synchronizing pulses is being send by the TV transmitter along with video information;  to synchronize the picture at the TV end.  There are both horizontal & vertical sync: pulses are present along with the transmitting video signal.  At the TV end; the synchronization separator circuit; built within an IC, will separate these signals and will routed to horizontal and vertical oscillator section circuits of the TV set; to lock the picture rock-rigid.
Here my problem is how I can measure this frequency.
If I could measure it; the set should switch ON; and stay ON.
Here the set switches ON and shuts OFF due to the shorted horizontal output junction.  If I rectify this short-circuit, the set will stay switched ON and I can measure all other voltages.
I de-soldered out the horizontal output transistor from circuit board.  Switched ON the set, without horizontal output transistor.  
Now I can and did measure the DC [+B] supply voltage with volt-meter.  This 110VDC supply voltage was OK.
Plugged the set to AC, and switched it ON.
The power/standby LED now stay ON, just for 5 seconds and shuts OFF; indicating a software load up.
Measured the horizontal frequency at the base foil point of the horizontal output transistor.  Found OK.  15.596kHz.
Switched OFF the set.  Soldered a new horizontal output transistor of same number in place. [D2499]
Plugged to AC power, and switched ON.
An EHT static felt at the front of the screen; but, within 10 seconds the transistor became very hot.
Either LOT or the deflection Yoke might be the reason.
Disconnected the deflection yoke plug from the main board.
Pulled out the CRT base card from the CRT neck and kept it securely without making any short circuit to it with any other components on board.
Switched ON the set, after plugging it to AC mains.
Checked the heat of the horizontal output transistor after 5 seconds.  It was normal. 
Means, the deflection yoke have the fault.  If the fault was within the LOT, the transistor might have heat up this time too.  It is difficult to detect the winding short, either to LOT or deflection yoke.  The only way is to check it by replacing with an other good one of same number.
I too did it.
Switched ON the set.  OK.
On checking, the deflection yoke the winding of it have corroded.  Might have short inside in between adjacent turns.  That was the fault.


HOOVER HNL9136-37S MACHINE - WASHER-DRYER - EXPLODED VIEW

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Exploded View _ Hoover HNL9136 _ Washer Dryer

CLICK ON THE PICTURES TO ZOOM IN

HITACHI WD7000-FD7000-FL7000 – How to enter Service Mode – Convergence Adjustment

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C47-WD7000_C57-WD7000_C43-FD7000_C50-FD7000_C43-FL7000 –  Hitachi Projection TVService Mode _ Memory Initialize _ Convergence Adjustment _ SMPS schematic (Circuit Diagram) _ Convergence Adjustments
SERVICE MODE
* Receive signal on main picture, then turn off the main power.
* Press and hold the [TV/VIDEO] button on Control Panel and then Power ON to access service adjustment mode. (Hold the [TV/VIDEO] button until service menu appears.)
* Adjust required items by the following table. Select item by or button on remote handset and adjust by or button.
* Press [ENTER] button to memorize the value.
DEFAULT DATA VALUES
CONVERGENCE ADJUSTMENT (9 Point Manual Convergence)
1 Receive RF or Video signal.
2 Press and hold the MAGIC/MANUAL FOCUS button for more than 3 seconds to enter the MANUAL CONVERGENCE mode
3 Release the MAGIC/MANUAL FOCUS button
4 Press the ▲▼►◄ cursor buttons to select adjustment point, press the [ENTER] button to display frame of red, move the ▲▼►◄ cursor buttons to adjust red convergence for better.
> Press the [ENTER] button to display frame of blue, press the▲▼◄► cursor buttons to adjust blue convergence for better.
> Press the [ENTER] button to display frame of white, press the ▲▼◄► cursor buttons to select another adjustment point, then perform (1)~(2) to adjust.
> When adjustment is done, press the [MENU] button, then the following screen will display as below.
0 Cancel adjusted data and exit from adjustment mode.
1 Save your adjusted data and exit from adjustment mode.
2 Return to manual convergence mode.
3 Recall the adjusted data of the previous auto convergence and return to manual convergence mode.
[If there is no operation for 3 minutes from the remote control unit, the TV will exit from MANUAL CONVERGENCE mode.]
The remote control unit of CLE-959 as an example to illustrate, the remote control unit of CLE-956 has the same function
MEMORY INITIALIZE & MODEL SETUP
Memory initialize
When replacing signal P.W.B or EEPROM (I007), it requires perform Memory Initialize operation.
Link the PSRT(1) and PSRT(2) for longer than 3 seconds.
Wait until the OSD ‘1’ is displayed (It takes several 10 seconds.); this means initialization is completed and each settings become factory preset condition.
Do not unplug the outlet or perform any key operation until the initialization is completed.
Model Setup
After set the Items according to the following tables in Service Menu, Set to INIT3 by following method.  (The model is set up by this operation. And initial-setting values according to the model are set up by this operation. At the same time, each settings
become factory preset condition)
(a) Select item No.627(INIT3) in service menu and press and hold the [recall] key on the remote handset until the OSD background changes to yellow. (It takes about 3 seconds.)
(b) Wait until the OSD background color becomes normal (It takes several 10 seconds.) , this means initialization is completed and each settings become preset condition according to the model . [Do not unplug the outlet or perform any key operation until the initialization is completed.]
Check the setting state displayed on the upper right of a service menu.
SMPS SCHEMATIC
Click on the pictures to Zoom In

HOW TO ADJUST CONVERGENCE - HITACHI Projection TVs _ WD7000 - FD7000 - FL7000

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HITACHI Projection TVs _ WD7000 - FD7000 - FL7000 - Convergence for outside digital & Convergence data adjustment procedure
Convergence for Outside Signal function
1. Press Service Switch on POWER/DEF P.W.B then display "Normal Crosshatch"
2. Press [MENU] key on R/C, then display "Red + Green Crosshatch with Red Marker" or "Green Crosshatch with Green Marker" or "Blue + Green Crosshatch with Blue Marker"
3. Press [MENU] key on R/C again, then display "Normal Crosshatch on Main Picture"
4. Press [MENU] key on R/C again, then display "Cross Marker + Box Marker on Main Picture"
5. Press [MENU] key on R/C again, then display "only Box Marker on Main Picture"
6. Press [MENU] key on R/C again, then display "Normal Crosshatch" again.
[And repeat procedure 2) ~ 6) by each press [MENU] key on R/C]
Convergence Data Adjustment Method
This function can adjust convergence data of all of one line (or all of screen) at the same time, in CONVERGENCE ADJUSTMENT MODE.
> Press Service Switch on DEF/CONVER P.W.B. to set to CONVERGENCE ADJUSTMENT MODE, then display Normal Crosshatch with Adjustment Point Marker.
> Press [SUB] key on R/C, then Extra horizontal lines appeared as set to RATER POSITION ADJUSTMENT MODE.
If Adjustment Point is on center, by press cursor key on R/C, then Convergence Data of all of screen are exchanged at the same time.  By press [UP] [LEFT] key on R/C, move up (left) RED convergence data of all of screen.
If Adjustment Point is NOT on center, by press cursor key on R/C, then Convergence Data of all of one line that Adjustment Point Marker is existing are exchanged at the same time.
By press [UP] [LEFT] key on R/C, move up (left) RED convergence data of all of horizontal (vertical) line that Adjustment Point Marker is existing.
Press [SUB] key on R/C again to exit RATER POSITION ADJUSTMENT MODE

GRUNDIG LCD TV - SMPS SCHEMATIC - FSP115 and FSP223 - Service Mode

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FSP-115 & FSP-223 - SMPS_Grundig LCD TV 26GTX3000T
Universal remote control set-up codes to check with Grundig brand TVs
FSP-115 SCHEMATIC & PWB -Solder Side
FSP-223 SCHEMATIC & PWB - Solder Side.
CLICK ON THE SCHEMATICS TO MAGNIFY
HOW TO ENTER SERVICE MODE
Calling up the Service Mode:
* Press button i (M).
* Enter the code number 8500
FUNCTIONS OF BUTTONS
M (i)  - Call up / exit the dialog center
▲▼– call up the dialogue line [point mdnu]
OK – Call up menus
◄►- Changing the settings
(Z) or [<=] - Sub menu – back to the main menu
Main menu: Exit the service mode.
Universal remote control set-up codes
0018 0039 0049 0080 0090 0101 0119 0145 0152 0194 0195 0217 0221 0232 0233 0247 0250 0384 0407 0421 0454 0620 0637 0644 0658 0810 0813

JVC AV30W475 - CRT TV - SMPS CIRCUIT DIAGRAM - URC set up codes

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SMPS Schematic & PWB SMPS part  at the Main Board_ JVC AV-30W475 - AV-30W475 _ CRT TV _ Universal remote control set-up codes to check with JVC brand TVs.

SMPS SCHEMATIC
PWB - SMPS PART at main board (Solder Side)
UNIVERSAL REMOTE CONTROL SET-UP CODES
0007 0018 0075 0103 0123 0154 0163 0170 0182 0214 0225 0409 0433 0465 0657 0670


TCL and THOMSON LCD TV SMPS and INVERTER SCHEMATIC 01 LS182C0 PWB

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POWER SUPPLY (SMPS) & INVERTER SCHEMATIC _ ICs USED – L6562D  FSQ510  SG3525A  UC3245BN  LM358  F8222 _ TCL & THOMSON LCD TVs
SMPS SCHEMATIC 01-LS182C0-PWB
INVERTER CONTROL
24V&INVERTER
CLICK ON THE SCHEMATICS TO MAGNIFY

THOMSON 52W610 HOW TO ENTER SERVICE MODE - CONVERGENCE ADJUSTMENTS

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Service mode & convergence adjustments _ Thomson 52TW610_ 52” Projection TV [PRTV]
SERVICE MODE
* Switch the TV into “Standby” mode by pressing the Standby button on the RCU.  Wait till the TV goes into the standby.
* Press the VOL(--)button and then the PR(--)button on the TV keyboard.  Hold them down for more than 8 seconds.
* After the normal switch on time, when the 8 seconds have elapsed, the main service menu appears on the screen.
* Press Exit on the Remote control.
Everyday use menu can be accessed via Menu button. (Text and EPG not available)
Field Service Menu can be re-entered via Blue button.
In service mode
> The child lock function is re-initialized
> Clear any wake-up/sleep/memo/EPG timers
> Pin 8 of the scart plug has to be ignored.
> AV- Link WSS detection and letterbox detection (autoformat) have to be disabled.
> EPG and TELETEXT have to be disabled.
> Automatic standby functions, in case of no antenna signal have to be disabled.
> All passwords have to disabled.
> Installation Mode disabled.
> Default format and zoom.
> The Chassis Variant will be checked and stored
CONVERGENCE ADJUSTMENT PROCEDURE
For every point on the screen, each of the three beams has a specific correction possibility in both horizontal and vertical planes. To achieve this, three levels of adjustment are available in the Service Mode. The unit is also equipped with an alignment grid pattern generator incorporated on the convergence circuit board.  
IN SERVICE MODE Select the “CONVERGENCE
Select “LEVEL 1,2 or 3” menu line and LEVEL 1,2 or 3 ALIGNMENT menu will appear.
LEVEL 1 ALIGNMENT MENU
* Press the“ OK” button on the RCU to activate the Red-Green test grid pattern.
* Confirm that the Green geometry is correct.Green adjustable only at level 2 and 3.
* Press the“ RED” button on the RCU to activate the red test grid, the cursor will be set to the centre point on the red grid.
* Using the“ NAVIGATION” (“ up,“” down,“ ” left and “” right) buttons on the RCU, align the red central cursor position to the green centre grid reference point.  A long press on the associated“ NAVIGATION” button on the RCU will accelerate the step size of the adjustment.
* Press the“ OK” button on the RCU to advance to the next cursor position and repeat the alignment process until all twenty five (9th = screen bottom left) alignment position have been checked.
* Press the“ EXIT” button on the RCU to return to“ Level 1” menu.
* Select” RETURN” on the menu.
* Next select“ STORE” on the convergence menu.
Repeat the alignment procedure for“ BLUE” in pressing the blue button to activate blue-green test grid pattern.
LEVEL 2 ALIGNMENT MENU
> Press the“ OK” button on the RCU to activate the Green test grid pattern, this is used throughout the alignment procedure as a reference.
> Confirm that the Green geometry is correct.
> Press the“RED” button on the RCU to activate the red test grid, the cursor will be set to the centre point on the red grid.
> Using the“ NAVIGATION” (“up,“” down,“” left and “” right) buttons on the RCU, align the red central cursor position to the green center grid reference point.  A long press on the associated “NAVIGATION” button on the RCU will accelerate the step size of the adjustment.
> Press the“ OK” button on the RCU to advance to the next cursor position and repeat the alignment process until all twenty five (25th = screen bottom left) alignment position have been checked.
> Press the“ EXIT” button on the RCU to return to“ Level 2” menu.
> Select” RETURN” on the menu.
> Next select“ STORE” on the convergence menu.
Repeat the alignment procedure for“ BLUE
LEVEL 3 ALIGNMENT
Each one of the 195 alignment point can be reached by Using the NUMERICAL buttons 2 (up), 8 (down), 6 (right) and 4 (left) on the RCU to position the cursor on the screen.
Convergence alignment is done using the“ NAVIGATION” (“up,“ ” down,“” left and“” right) buttons on the RCU.
* Press the“EXIT” button on the RCU to return to“ Level 3” menu.
* Select “RETURN” on the menu.
* Next select “STORE” on the convergence menu.
[Once “Level 3” alignment is completed, do not use“ Level 2” otherwise all adjustments made in“ Level 3” will be ERASED.]
Convergence defaults
If the convergence alignment is completely wrong most adjustments can be made starting with the factory convergence values, these are stored in the NVM as default values.  Default Red/Green/Blue:All of the colours convergence default. Values are stored in the Convergence RAM IC.
Default Red
Default Green
Default Blue
Restore: copies the last stored values from the NVM to the convergence RAM IC.
Store: Copies all Convergence RAM values to the NVM.


LG DU34FZ20 - SMPS and DEFLECTION SECTION SCHEMATICS

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Horizontal & Vertical Scan section and SMPS circuit diagrams _ LG DU34FZ20 (USA & CANADA)
SMPS & DEFLECTION SCHEMATIC
CLICK ON THE SCHEMATICS TO ZOOM IN

LG HT306SF Power Supply and Power Amp circuit diagram _ Firmware Update

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LG HT306SF – HT306SH36F-S – HT306SH36SUW Home Theater System – Firmware Upgrade _ Power Amp & SMPS (Power Supply) Schematic. USED ICs  LC87F5M64A_M24C16_TAS 5352
HOW TO ENTER SYSTEM INFORMATION
* Enter into SETUP menu with NO Disc  in the tray.
* Put on cursor [Highlight] 16:9 wide option of TV aspect in SETUP menu.
* Press follow key in continuous using remote control.
1> 3> 9> 7> 1> 3> 9> ENTER
HOW TO UPDATE THE DVD and AUDIO MICOM PROGRAMS
The Whole Sequence
> DVD program download.
> Power cord
Out> In.
> Audio micom program download.
> Remote control Pause key
|| + ‘1472’ for input options.
> Enter into the system information for check the version, options and check sum.
> Power
Off> On.
HOW TO UPDATE THE MTK-DVD PROGRAM
* Change the filename to download as “LG_(MODEL NAME).ROM”.   [Both Upper and Lower case In filename is possible]  Ex.) HT306: “LG_HT306.ROM”
* Copy the file to the formatted USB, and burn it.
* Move to the USB function, and insert the USB to the set.  The upgrade information will be shown on the screen.
* Remove the USB, press PLAY key of the remote control.
* Remove and reconnect the power cable when it changes to logo screen from upgrade information. Then the upgrade process is completed.
HOW TO UPDATE THE AUDIO-MICOM PROGRAM
> Change the filename to download as “(MODEL NAME)_(Version).HEX”. Only upper cases are permitted.  Ex.) HT306: "HT306_0809262.HEX"
> Copy the file to the root folder of USB storage.
> Put the USB into the SET, and move to the USB function.  Then the upgrade process will be started with the upgrade information.
> If the upgrade process is complete, the set will be power off automatically with “Complete” message.
HOW TO CLEAN THE LENS
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort lens.
Never attempt to disassemble the pick-up.
Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.  (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
POWER Supply & POWER Aamplifier CIRCUIT DIAGRAM [SCHEMATIC]
Power PWB Top & Bottom view
POWER AMP 
CLICK ON THE PICTURES TO MAGNIFY

KONKA LED lcd tv 32F3000C SUPRA STV LCS26740 - TV SCHEMATIC POWER and BACKLIGHT INVERTER

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SMPS & Back-light Inverter Circuit Diagram _ Konka LED LCD TV
Used ICs MT8227_MX25L3206_TDA19283_SY8009A_FR9888_OZ9902C_FAN6755W

SMPS SCHEMATIC
LED BACK-LIGHT INVERTER SCHEMATIC
CLICK ON THE SCHEMATICS TO ZOOM IN

V GUARD DELUXE50 FIRDGE STABILIZER – Repair Help FROM MY SERVICE TABLE TODAY

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V-Guard Fridge Stabilizer Deluxe 50 - Dead - No Input & output LED lights up.  No output voltage.
Condition: Dead.  No input or output LED light up.
Used a pre-programmed IC CTM1273 to control the circuit board PWB.
On checking, the thermal fuse found damaged.
 Replaced the thermal fuse (inserted inside the primary side of the transformer).  Power light came alive, but there was no output LED light up; or any output voltage; even after 5 minute duration.
Checked the components on circuit board.  The relay used (on board) HJR-3FF-S-2 was found non operative.  Its winding was open.  Replaced the same; and checked OK.
When checking this stabilizer, check the AC fuse [the thermal fuse in the transformer] first.  This fuse can be replaced. Pull that fuse out (after de-solder its two connections).  Insert a new one in place and solder the terminals as it was.  I’ve marked both the damaged component that I’ve replaced.  Note the photographs attached.
If the pre-programmed IC said above is found damaged, contact the authorized service center for V-Guard.  There is no way to get it from open electronic spare part market.

VIDEOCON 21 inch CTV REPAIR HELP From MY SERVICE TABLE TODAY

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Retrace lines all over the screen _ High brightness _ Audio OK _ Faint picture 
FBT Number to this set isBSC24-01N 4013E
In most cases, there are two reasons for this retrace lines.  The first one is with a high screen voltage.  In rare cases, the screen-pot meter [built inside the FBT] might be faulty.  If so, there is no repair to this fault, other than replace the FBT/ [LOT].
The second possibility is reduced video output stage supply voltage.  This voltage is generated by one among the winding of the FBT.  For some sets, it will be from the main SMPS section itself.  This supply voltage may vary from 280VDC to 290VDC.  It will depend upon the model & circuit of the TV. The most probable reason for a low video output stage supply voltage is, either the diode that rectifies this voltage at the FBT winding end is faulty; or the smoothing capacitor used with this DC supply line has open.  The capacitor used here might be 10MFD to 22MFD; electrolytic type of high voltage rating.  Usually it will be 10MFD350VDC.
If this capacitor is open, the DC voltage will drop considerably, causing a very low voltage at the cathodes of the CRT gun; which in turn make it high emitting (electron) state, causing a screen of too high intensity along with vertical retrace lines.  The lines will appear across the screen; all over it, at a space of 1 or 2 inches.  They will be slightly slanted too; in position.  I've attached the photograph of the effected TV screen here.
 What I did first is to check the supply voltage to the video output section [CRT base card].  It was found normal here. And the fault should be of an abnormal screen voltage. 
 When I noticed closely to the screen, there is a very faint picture, but, it was or normal in size.  Slightly expanded than normal.
 The +B voltage from the SMPS section should be suspected.  I did check it.  According to the schematic, it should be 108.5VDC at load.
But, here it shows about 117.7VDC.  Much more than normal.  Adjusted it.  There is a pot-meter on board at the SMPS stage circuit to this set.  It can be adjusted.  The SMPS of this set is an adjustable type, not auto.
Ahh:  It worked fine.  No other adjustments have to do here.  Cleaned the inside of the set and circuit board using hot air blower.  My work is over.  Delivered after 2 hours check.
AFTER THE ADJUSTMENT
SCREEN POT-METER POSITION Here I haven't adjusted it any more

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