Tuesday, December 31, 2013

HOW TO REMOVE DISPLAY PANEL - HP Compaq Notebook NC4000 - Series


DISPLAY ASSEMBLY [12.1-inch TFT XGA with wireless device antennae 325509-001]

  • Close the notebook and position the notebook so the rear panel faces forward.
  • Remove the two T8M2.0×8.0 screws that secure the hinge covers to the notebook
  • Position the notebook so the front faces forward and open the notebook as far as it will open. 
  • Remove the display hinge covers by inserting a flat-bladed tool under the covers and lifting them up. [The hinge covers are included in the Miscellaneous Plastics Kit, spare part number 325528-001.]
  • Remove the wireless antenna cables [1] and [2]from the routing channel in the top cover [3].
  • Disconnect the display inverter[1] and video cables [2]from the system board.
  • Remove the two {T8M2.0×8.0} screws[3]that secure the display assembly to the base enclosure.
  • Disconnecting the Display Cables and Removing the Display Assembly Screws.
  • Lift the display assembly straight up and remove it.  Reverse the above procedure to install the display assembly.

HP Compaq Notebook NC 4000 Series_HOW TO REMOVE - FAN – KEYBOARD – LED SWITCH COVER

LED SWITCH COVER - FAN - KEYBOARD
Turn the notebook bottom side up with the rear panel facing forward.
Remove the two T8M2.0×8.0 screws that secure the LED switch cover to the notebook.
Turn the notebook top side up with the front facing forward.
Open the notebook as far as it will open.
Press down on the esc key [1] to reveal the notch [2] in the left side of the LED switch cover.
Insert a flat-bladed tool into the notch and lift the left side of the LED switch cover [3].
After the left side of the LED switch cover has disengaged from the notebook, swing the LED switch cover up and to the right.
Remove the LED switch cover.
Close the notebook and turn it bottom side up with the rear  panel facing forward.
Turn the notebook top side up with the front facing forward.
Open the notebook as far as it will open.
Lift the rear edge of the keyboard [1].
Slide the keyboard toward the display [2] until the notches on the front edge of the keyboard clear the top cover.
Swing the front edge of the keyboard up and back [3] until it rests on the display.
Release the zero insertion force (ZIF) connector[1]to which the pointing stick cable is attached and disconnect the pointing stick cable [2] from the system board.
Release the ZIF connector [3] to which the keyboard cable is attached and disconnect the keyboard cable 4from the system board.
Remove the keyboard.
After the keyboard is removed, the internal memory expansion socket is accessible. Follow these steps to remove a memory expansion board from the internal memory expansion socket:
Spread the retaining tabs [1] that secure the memory expansion board to the socket. The board rises up at a 45-degree angle.
Pull the board away from the socket at a 45-degree angle [2].
Disconnect the fan cable 1from the system board.
Remove the three PM2.0×3.0 screws 2that secure the fan to the heat sink.
Remove the fan.
CAUTION: When installing the fan in the heat sink, make sure the fan cable is not get crimped by the screw next to the cable clip [3]. If the cable is crimped and damaged, the fan will not cool the notebook internal components, which could result in damage.

MS_KX - FT932-BR-B - PANASONIC Personal Facsimile _ TROUBLESHOOTING


TROUBLESHOOT
Defective ITS (Integrated Telephone System) Section. No handset and monitor transmission / reception:
Following the ITS section or NCU section, search for the route between the microphone and the telephone line (sending) or between the telephone line and the speaker (receiving) where the signal disappears.  Check the components at that point.
NO PULSE DIALLING
NO RINGTONE / NO BELL
NO TONE DIALLING
Power Supply Board Section.  Key components for troubleshooting
Check the following parts first: F1, D10-D13, C5, and Q1.  This comes from our experience with experimental tests. For example: power supply and lightning surge voltage test, withstanding voltage test, intentional short circuit test, etc.
Caution:  If you find a melted fuse in the unit, donot turn on the power until you locate and repair the faulty parts (except for the fuse); otherwise the fuse will melt again and you cannot pinpoint the faulty point.  In most cases, the symptom is that nothing is output. It is more likely that the fault is in the primary side rather than the secondary side. Check the primary side first.
TROUBLESHOOTING FLOWCHART
Broken Parts Repair Details
(D10, D11, D12, D13).
 Check for a short-circuit in terminal 4. If D10, D11,D12 and D13 are short-circuits, F1 will melt (open).  In this case, replace all of the parts (D10, D11, D12, D13, F1).
(Q1)
The worst case of Q1 is a short-circuit between the Drain and Gate because damage expands to the peripheral circuit of Q1.  This is due to a very high voltage through the Gate circuit which is composed of R19, Q2, and Q21 etc.  You should change all of the parts listed as follows.  F1, Q1, R19, Q2, Q21
(D101, D104)
If D101 and D104 are broken, the oscillation circuit in the power supply cannot operate. Check it with an electric tester.

Sunday, December 29, 2013

Personal Facsimile MS KX FT932BR - PANASONIC _ SMPS SCHEMATIC _ SERVICE MODE

SERVICE MODE
   The programming functions are used to program the various features and functions of the machine, and to test the machine. This facilitates communication between the user and the service man while programming the unit.
   There are 2 basic categories of programming functions, the User Mode and the Service Mode. 
The Service Mode is further broken down into the normal and special programs. The normal programs are those listed in the Operating Instructions and are available to the user. The special programs are only those listed here and not displayed to the user.
 In both the User and Service Modes, there are Set Functions and Test Functions. The Set Functions are used to program various features and functions, and the Test Functions are used to test the various functions. The Set Functions are accessed by entering their code, changing the appropriate value, then pressing the SET key. The Test Functions are accessed by entering their code and pressing the key listed on the menu. While programming, to cancel any entry, press the STOP key.
SMPS SCHEMATIC
CLICK ON THE PICTURES TO ZOOM IN

PANASONIC KX-MB783-BR _ SERVICE CODES - TROUBLESHOOTING - INITIALIZATION


TO ENTER THE REMOTE PROGRAMMING MODE & CHANGING SERVICE CODES
If, after the call is connected, the customer describes the situation and it is determined that the problem can be corrected by making parameter changes, this function makes it possible to change parameters such as the user code and service code from another fax (using DTMF tones). Therefore, travel to the customer's location isn't required. However, it is not possible to change all the parameters remotely (PROGRAM MODE TABLE(P.98)). The function used to accomplish this is remote programming.
First, in order to check the current status of the service code parameter, print out the setup list (code: 991) and the service list (code: 999) from the customer's fax machine.
Based on this, the parameters for the desired codes can be changed.
The procedure for changing and listing parameters is described on ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICE CODES. Also, before exiting the remote programming-mode, it is advisable to obtain a new list to confirm that the changes were made correctly.
HintSince the connected telephone is in use during the remote programming mode, it may be helpful to ask the customer to switch to the speaker phone. This frees the customer from the need to remain right next to the fax while you are making parameter settings. When finished, inform the customer. Also note that in very noisy locations where the DTMF tones are not audible, the remote programming function will not work.
ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICE CODES.
CLICK ON THE TABLES TO ZOOM IN 
TROUBLESHOOTING
Troubleshooting is for recovering quality and reliability by determining the broken component and replacing, adjusting or cleaning it as required. First, determine the problem then decide the troubleshooting method. If you have difficulty finding the broken part, determine which board is broken. (For example: the Main PCB, Sensor PCB, etc.) The claim tag from a customer or dealer may use different expressions for the same problem, as they are not a technician or engineer. Using your experience, test the problem area corresponding to the claim. Also, returns from a customer or dealer often have a claim tag. For these cases as well, you need to determine the problem. Test the unit using the simple check list on SIMPLE CHECK LIST(P.104). Difficult problems may be hard to determine, so repeated testing is necessary.
Determine the symptom and the troubleshooting method.
INITIALIZATION
There are two types of initialization, one is the short initialization (about 3 seconds) and the other is the long initialization (about 10 seconds). The short initialization makes the unit enter the standby mode. The long initialization makes the unit enter the standby mode after cleaning or detecting the rest of toner.

Va & Vs VOLTAGE ADJUSTMENT - LG 60 Inch - 50 Inch & 42 Inch PLASMA TVs


ADJUSTMENTS
Each PCB assembly must be checked by check JIG set.  (Because power PCB Assembly damages to PDP Module. So be careful)
PSU(Power Supply Unit) Voltage Adjustment (Va, Vs Voltage Adjustment).
Adjust the voltages Va and Vs supplied from the PSU to the module within the specified range of each module to supply the stable power.
Adjustment (60”).  Va Voltage Adjustment
  • Connect + terminal of D.M.M to Va pin of P812 and connect –terminal to GND pin of P812.
  • Adjust VR901 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)
Vs Voltage Adjustment
  • Connect + terminal of D.M.M to Vs pin of P812 and connect –terminal to GND pin of P812.
  • Adjust VR951 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)
Connection Diagram of Power Adjustment for Measuring (Power Board): 60”
Adjustment (50”).  Va Adjustment
  • Connect + terminal of D.M.M to Va pin of P12 and connect –terminal to GND pin of P12.
  • Adjust VR951 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)
Vs Adjustment
  • Connect + terminal of D.M.M to Vs pin of P12 and connect –terminal to GND pin of P12.
  • Adjust VR901 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)
Connection Diagram of Power Adjustment for Measuring (Power Board): 50”
Adjustment(42”).   Va Voltage Adjustment
  • Connect + terminal of D.M.M to Va pin of P812 and connect –terminal to GND pin of P812.
  • Adjust VR901 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)
Vs Voltage Adjustment
  • Connect + terminal of D.M.M to Vs pin of P812 and connect –terminal to GND pin of P812.
  • Adjust VR951 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)
Connection Diagram of Power Adjustment for Measuring (Power Board): 42”(EAY32808901)

LG 60PG60 - TROUBLESHOOTING - PLASMA TELEVISION [PU 82C CHASSIS]


TROUBLESHOOTING
TV/CATV DOESN'T DISPLAY
CLICK ON THE CHARTS TO MAGNIFY 
NO VIDEO DISPLAY
COMPONENT DOES'T DISPLAY
R-G-B _ PC DOESN'T DISPLAY
NO HDMI DISPLAY

Friday, December 27, 2013

SONY KLV 32L500A - POWER SUPPLY SCHEMATIC [Circuit Diagram] _ FA5501AN-D1-TE1_2SK2158_2SK4096


SMPS SCHEMATIC
Click on the pictures to Zoom In
Component Side
Foil Side
POWER SUPPLY SCHEMATIC_SPLIT

OPTICAL PICK-UP REPLACEMENT - SONY - DVP-NS15/NS51P/NS43P/NS53P/K56P


DISASSEMBLE PROCEDURE
LOADING ASSEMBLY
CLICK ON THE PICTURES TO MAGNIFY 
OPTICAL PICK-UP
Note:

Solder short land before remove the FMO-009 Flat Flexible Cable from 24 pin BU connector.
  Laser Diode in the optical Device is very sensitive to Surge Current or ElectroStatic Discharge (ESD).  After take-out FMO-009 Flat Flexible Cable from CN101 of MV-47/MV-48 board immediately ground FMO-009 Flat Flexible Cable pattern using short clip. Metal paper clip can be used as short clip.