ALTO MODEL: L12 - L16 - L20 – PROFESSIONAL EQUALIZER – CIRCUIT DIAGRAM - TESTING

ALTO MODEL: L12 - L16 - L20 – Professional Equalizer – Circuit Diagram - Testing

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Functions test
a. Input the proper AC power supply, turn on the main power, POWER LED will be illuminated (green). Then switch on PHANTOM power, PHANTOM LED will be illuminated (red), use a voltmeter to test the first pin and second pin of each MIC (MIC 1, MIC 2), the volt of phantom power should be 46V(±2V). then power off the switch.(Note: please turn off the switch when you are doing the steps of test procedure as follows)
b. Set all TRIM, LEVEL, EQ, AUX knobs to the position of 0, set PAN to the position of LEFT. All buttons to the position of OFF.
c. Input the signal from balanced sockets (MIC 1 & MIC 2), input the signal from  unbalanced sockets (LINE IN 3/4&LINE5/6)
d. Input the signal to the unbalanced AUX RENTURN sockets separately, test the balanced output (LEFT & RIGHT) of MAIN MIX OUTPUT, which should be 5dBu (±1dB) THD + N<0.003%.
e. Insert the RCA plug to L& R of TAPE IN separately:
First, press 2TK TO MIX button, test the unbalanced outputs (LEFT&RIGHT) of MAIN MIX OUTPUT, CONTROL ROOM and PHONE (need stereo plug for testing) separately, which should be 0dBu(±1dB) THD + N<0.006%.the output of TAPE OUT is 0dBu(±1dB)
Then release 2TK TO MIX button (OFF), no input from CONTROL ROOM, when press 2TK TO CONTROL ROOM, test the output, which is 0dBu (±2dB) THD + N<0.002%.

f. Input +15dBu 1kHz sine wave (load out 600Ω, BNC-Unbalanced) through LINE 1, when turn MAIN MIX LEVEL counter-clockwise to the minimize, all LEVEL LEDs will turned off, when turn MAIN MIX LEVEL pot clockwise to the
maximize, the LEVEL LEDs will be illuminated in sequence. test that whether the relating LED is illuminated when the level of output signal reaches the exactly value as LED shows . If so, test the maximize output level (before clipping) is
20dBu(±1dB) THD + N<0.1%.)
Adjust TRIM knob of CH 1 clockwise, PEAK LED will be illuminated (red). And test all PEAK LEDs from CH 1 to CH6
frequency response test
When Test the inputs of LINE 1, LINE 2, LINE 3, LINE 4, LINE 5, LINE 6 separately as follows, the frequency response curve of MAIN MIX OUTPUT (LEFT & RIGHT) (the preset of all knobs are the same as function test step 2.b)
a. Open S8RESP1.atl test procedure, press and release the LOW CUT switch, test the frequency response curve of LINE 1, LINE 2 LINE 3, LINE 4

b. Turn EQ HI &LOW knob to the MAX and the MIN (EQ MID at the middle), test the frequency response.

c. Turn EQ MID to the MAX and the MIN (EQ HI &LOW at the middle), test the frequency response.

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Remarks: the frequency response test of normal instruments

a. Turn EQ LOW knob of the relating channel clockwise to the max (+15), the output is +15dBu(± 2dB), then turn EQ LOW knob of the relating channel counter-clockwise to the min. (-15), the output is –15dBu(± 2dB)

b. Input the signal at 2.5kHz, Turn EQ MID knob of the relating channel clockwise to the max (+12), the output is +12dBu(± 2dB), then turn EQ MID knob of the relating channel counter-clockwise to the min. (-12), the output is –

12dBu(± 2dB)

c. Input the signal at 15kHz, Turn EQ HIGN knob of the relating channel clockwise to the max (+15), the output is +15dBu(± 3dB), then turn EQ HIGH knob of the relating channel counter-clockwise to the min. (-15), the output is –15dBu(± 3dB)

DSP

a. Input the signal from MIC1, output the signal from MAIN MIX OUTPUT, turn AUX RTN2(DFX)clockwise to the MAX, turn PRESETS and VARATIONS knobs, the signal will be processed by DSP, if the level of the signal is over-high, PEAK LED will be illuminated to red, press DFX MUTE button, Bypass the signal, press the footswitch, which is connected to DFX FOOSWITCH, the signal will get out of BYPASS.

b. Input the signal from MIC 1 to MIC 4, output the signal from AUX SEND S1, turn AUX 2 /DFX TO AUX 1 counter-clockwise to the MAX., turn PRESET and VARATIONS knobs, the signal will be processed by DSP. (do not need to test L6 with this step)

Sampling test

Connecting L 6 to a power amplifier and speakers, listening to the sound, no noise is OK.

Company preset: turn all volume knobs to the MIN. other control knobs to the middle, all switches to the position of OFF.

HAIER AU242FHBIA AU482FIBIA AU48NFIBJA WIRING DIAGRAM COMMERCIAL AIR CONDITIONER

HAIER AU242FHBIA AU482FIBIA AU48NFIBJA Wiring diagram Commercial Air Conditioner

Haier Air-conditioned wiring diagrams [CLICK ON THE DIAGRAMS TO ZOOM IN]

AU242FHBIA WIRING DIAGRAM

AU482FIBIA

AU48NFIBGA

AB**2FCBIA

AE**2FCBKA

AS**2FCBHA

MP3A WIRING DIAGRAM

Click on the Diagrams to Magnify

LG - BS254_BX254_BX324 - DATA PROJECTOR - FLASH-TOOL FIRMWARE - HOW TO DOWNLOAD & UPGRADE

LG - BS254_BX254_BX324 - DATA PROJECTOR - FLASH-TOOL FIRMWARE - HOW TO DOWNLOAD & UPGRADE

FLASH-TOOL FIRMWARE

System Requirement

IBM compatible PC (Desk Top).

Windows XP-SP2 operating system.

• Launch the “DLP Composer Lite v10.0” from installed shortcut at  Program > DLP Composer(TM) Lite 10.0 > DLP Composer(TM) Lite 10.0.exe

While executed, the window shall appear as the following picture.

• Click on the “Edit” button to continue to the“DLP Composer Preferences” page.
• Turn on the projector, press the” MENU “button on the keypad or IR controller.
• Then select “Installation II”,then press“ Down ”button and select “ Advance ” item.
• Press “Down” button on the keypad to select “Low Power Mode” item,  Press the “Enter” button to set function to “Off”.

• Turn off the projector.
• Make sure that the RS-232 cable is firmly connected between projector and computer.
• Using the remote control and press <Down>, <Up>, <Right>, <Up> keys in sequence using buttons.
• The “Power LED” shall blink twice and the download mode will be enabled.

• Click on the “Communications” button to continue to the “Communications” page.
• Choose the “Serial Port” item of Projector Interface.
• Select “COM1: (In-use)” item.
• Click on the “Configure” button to continue to the” Serial Port Configuration” page.

Set Baud Rate = “115200”

Set CTS = “Disable”

Click on the “OK” button to continue.

• Choose the “Flash Loader”item of DLP Composer Lite.
• On the Flash Image File: Press “Browse” button to locate the new firmware which can be downloaded from PC. (For example file name: DP2404_LG_DVT03_20091119.img).  
• Select the desired *.img file by either double clicking the file, or pressing the “Open” button.

• Press the “Start” button to update the flash with the chosen firmware.
• A warning message box will appear for confirmation. Press [Y] to continue.

When the last warning message box appears, this is the last chance to cancel the update.

Press “Confirm” button to start the firmware update.

LG BS254 _ BX254 _ BX324 DATA PROJECTOR - HOW TO ENTER SERVICE MODE - REPLACE THE LAMP - PASSWORD RESET - LAMP TIME RESET & ERROR CODES

LG BS254 _BX254_BX324 DATA PROJECTOR -

HOW TO ENTER SERVICE MODE - REPLACE THE LAMP - PASSWORD RESET - LAMP TIME RESET & ERROR CODES

SETTING AN ACCESS PASSWORD

   You can use the four (arrow) buttons to set a password and prevent unauthorized use of the projector. When enabled, the password must be entered after you power on the projector.

IMPORTANT: Keep the password in a safe place. Without the password, you will not be able to use the projector. If you lose the password, contact your re-seller for information on clearing the password.

• Press the MENU button to open the OSD menu.
• Press the cursor ◄►button to move to the Installation Imenu.
• Press the cursor ▲▼button to select Advanced.
• Press ◄-|   (Enter) / ►.
• Press the cursor ▲▼button to select Security Lock.
• Press the ◄►button to enable or disable security lock function.
• You can use the cursor buttons ◄▲▼► either on keypad or IR remote control for password entry. You can use any combination including the same arrow five times, but not less than five. Press the cursor buttons in any order to set the password. Select Menu to exit the dialog box.
• The password confirm menu appears when user press the power-on key in case the Security Lock is enabled. 
• Enter the password in the order.

Forget the password recovery (only used in the service center not to be in the end-user side)

Still pressed “MENU” key and plug the AC power cord when Power LED going to flashing => Phase a short time => flash three times.

Factory Reset

• Press the cursor ▲▼button to move up and down in the Installation IImenu. Select the
• Factory Reset sub menu and press  ◄-| (Enter) / ►to reset all the menu items to the factory default values.

Service Mode

• Turn on the projector, press the” MENU “button on the keypad or IR controller, Then select “Installation II”, then press“ Down ”button and select “ Advance ”
• Press  “Right” button on the keypad or  “ Enter “button by remote controller, then select  “Lamp Hour Reset”, press “Right” button or “ Enter” button.
• Press “ Enter “ button twice by remote control, then press   “ (▲)   (▼)   (◄) (►)”by remote control.

Replacing the Projection Lamp

Be sure to turn off and unplug the projector at least 30 minutes before replacing the lamp. Failure to do so could result in a severe burn.

• Loosen the captive screw on the lamp compartment cover.
• Remove the lamp compartment cover.

• Remove the three screws from the lamp module.
• Lift the module handle up.
• Disconnect the lamp connector.
• Pull firmly on the module handle to remove the lamp module.

Install the new lamp module. While installing, align the lamp module with the connector and ensure it is level to avoid damage.

The lamp module must sit securely in place and the lamp connector must be connected properly before tightening the screws.

LAMP TIME RESET

• Press the MENU button to open the OSD menu.
• Press the cursor ◄► button to move to the Installation II menu.
• Press the cursor button to move down to Advanced.
• Press the cursor ▲▼ button to move down to Lamp Hour Reset.
• Press the cursor ►or enter button.  A message screen appears.
• Press ▼ ▲ ◄ ►buttons to reset the lamp hour.
• Press the menu button to get back to the Installation II.

ERROR MESSAGES

In the event of an error, disconnect the AC  power cord and  wait for one (1) minute before restarting the projector. If the POWER or LAMP LED are still blinking or the over temp LED is lit, contact your service center.

PHILIPS 32HFL3009D SERVICE MOD AND FAULT FINDING TIPS - LCD TELEVISION REPAIR

PHILIPS 32HFL3009D Service mod and fault finding tips - LCD Television repair

PHILIPS 32HFL3009D

Service Modes
The Service Mode feature is split into five 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).

Service Alignment Mode (SAM)

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” 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 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

Factory mode:

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 screen” press “1999”, directly followed by the “Back” button. Do not allow the display to time out between entries while keying the sequence.
After entering the Factory mode, the following items are displayed,

How to Exit the Factory mode
Use one of the following methods:
• 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.

Customer Service Mode (CSM)

How to Activate CSM
To activate CSM, press the following key sequence on a standard remote control transmitter: “123654” (do not allow the display to time out between entries while keying the sequence). After entering the Customer Service Mode, the following items are displayed.
Note: Activation of the CSM is only possible if there is no (user) menu on the screen!

How to Exit CSM
To exit CSM, use one of the following methods.
• Press the MENU/HOME button on the remote control transmitter.
• Press the POWER button on the remote control transmitter.
• Press the POWER button on the television set.

Fault Finding and Repair Tips
Note:
• It is assumed that the components are mounted correctly with correct values and no bad solder joints.
• Before any fault finding actions, check if the correct options are set.

NVM Editor
In some cases, it can be convenient if one directly can change the NVM contents. This can be done with the “NVM Editor” in SAM mode. With this option, single bytes can be changed.
Caution:
• Do not change these, without understanding the function of each setting, because incorrect NVM settings may seriously hamper the correct functioning of the TV set!
• Always write down the existing NVM settings, before changing the settings. This will enable you to return to the original settings, if the new settings turn out to be incorrect.
Unstable Picture via HDMI input
Check (via ComPair or factory mode) if HDMI EDID data is properly programmed.
No Picture via HDMI input
Check if HDCP key is valid. This can be done in CSM.
TV Will Not Start-up from Stand-by
Possible Stand-by Controller failure. Re-flash the software.
Audio Amplifier
The Class D-IC U606 has a powerpad for cooling. When the IC is replaced it must be ensured that the powerpad is very well pushed to the PWB while the solder is still liquid. This is needed to insure that the cooling is guaranteed, otherwise the Class D-IC could break down in short timeLoad Default NVM Values It is possible to upload the default values to the NVM with ComPair in case the SW is changed, the NVM is replaced with a new (empty) one, or when the NVM content is corrupted. After replacing an EEPROM (or with a defective/no EEPROM), default settings should be used to enable the set to start-up and allow the Service Default Mode and Service Alignment Mode to be accessed.

CSM
When CSM is activated and there is a USB memory stick connected to the TV, the software will dump the complete CSM content to the USB memory stick. The file (Csm.txt) will be saved in the root of the USB memory stick.
Loudspeakers
Make sure that the volume is set to minimum during disconnecting the speakers in the ON-state of the TV. The audio amplifier can be damaged by disconnecting the speakers during ON-state of the set!
Display option code Attention: In case the SSB is replaced, always check the Panel Code in CSM, even when picture is available. Performance with the incorrect display option code can lead to unwanted side-effects for certain conditions.

SONY PROFESSIONAL DISC CAMCORDER - PDW-700 - SERVICE MODE - MANUALLY REMOVING THE CARTRIDGE AT POWER OFF – MANUALLY EJECTING THE CARTRIDGE WHILE POWER ON – HOUR RESET – FIRMWARE UPDATE USING USB

SONY PROFESSIONAL DISC CAMCORDER - PDW-700 - Service Mode - Manually removing the cartridge at power off – Manually ejecting the cartridge while power on – Hour reset – Firmware update using USB

Category: Digital Camera Repair and Service 

Contents of this article 

• How to access service mode 
• Taking out the cartridge 
• Firmware update using USB 

SONY PDW-700

How to Take Out a Cartridge Manually Taking Out a Cartridge at Power-off
1. Open the cover in the direction of the arrow A.
2. Push the lock lever in the direction of the arrow B with a screwdriver. The cartridge lid assembly is opened in the direction of the arrow C.
3. Rotate the gear counterclockwise with a crosshead screwdriver to eject the cartridge. If a cartridge cannot be taken out, turn the gear clockwise until it will go and then turn it counterclockwise again.
NOTE
Turn the gear slowly and gently. Be careful not to force the gear past their stopping points.
# Be sure not to touch or forcibly take out the cartridge until it is completely ejected.
#  Even when the cartridge cannot be ejected with this procedure, do not rotate the gear with an excessive force. This error may be caused by a problem in the loader assembly.

When You Cannot Take Out a Cartridge Even If Pressing the EJECT Button at Power-on
1. Remove the outside panel.
2. Remove the four screws and remove the laser caution sheet.
3. Push the release pin in the direction arrow A, and pull out the cartridge from the unit in the direction of the arrow B.
NOTE
Be careful not to touch the disc surface in the cartridge.

Firmware Update Using the USB Memory
When the firmware update is performed, all types of firmware are updated.
There are two methods of upgrading the firmware. One is the method by using the USB memory and the other is the method by accessing the XDCAM website. This section describes the method by using the USB memory.
For the method of accessing the XDCAM website,
For the method of upgrading by using the USB memory, the USB memory  in which the firmware package file of the latest version is saved is required. For the firmware package file, please contact your local Sony care.

NOTE
A general USB memory used for PCs can be used. But when the USB memory is connected to the USB connector, if the screen shows “Unknown USB”, or the message screen shows “NO USB MEMORY” during the update, the connected USB memory may have a problem or it may be misrecognized as an unsupported device. In such a case, connect another USB memory and try again.
# It takes about 20 minutes to complete the update.
# When the USB memory  is removed during the update, the USB memory  may be damaged. Make sure not to remove the USB memory during the update.
# Do not turn off the power during the update.
# When a disc is inserted, eject it.
# Set the VDR SW in the inside panel to “STBY”.
# If the update fails while the LABY update is in progress, picture and character may not be displayed in some cases. In such case, repeat update by following the procedure described below.
1. If a memory stick is inserted, remove it and insert a USB memory  that contains the package file (extension: pkg) in its root directory.
2. While pressing the REC START button and the MENU knob at the same time, turn ON the power.
3. Wait approximately 30 seconds after power-on. Then, the tally changes from the flashing at 4 Hz to the flashing at 1 Hz. (Flashing indicates that update is in progress.)
It takes approximately 20 minutes until the update is complete.
4. The tally changes from flashing to lighting. (It indicates that update is complete.)
5. Turn OFF the power and reboot the Camcorder. It boots up with new version.

1. Copy the firmware package file (extension: pkg) to the USB memory  of the root and plug it into the USB connector of the unit.
2. Move the arrow to the DIAGNOSIS category page named “ROM VERSION 1”, and press and hold the MENU knob.
“SEARCHING PACKAGE FILE” blinks about 10 seconds

3. When the firmware package file exists in the root, the display appears.

4. Press the MENU knob while the arrow is pointing at “PACKAGE”.
5. The YES/NO confirmation menu appears.

6. When YES is selected, the firmware update starts. During the firmware update, the tally blinks at 1 Hz. “UPDATING” indicates the firmware being updated, and “Total time” indicates the elapsed time.

7. When the update is completed normally, the following message that prompts you to turn on/off the power appears. Tally changes from blinking to light on.

8. When the power is turned off and the unit is restarted, the firmware version is updated.
NOTE
If the firmware could not be updated to new version or if an error is displayed upon completion of version update, it indicates that the firmware version update has failed. Repeat the version update by following step
2 through step 8 again.

Protection Mode
When this unit detects an error, it enters a protection mode to prevent the cartridge disc, optical drive, and other components from damage or failure.
The protection mode depends on error status. When a cartridge is inserted, press the EJECT button and remove the cartridge.
The cartridge may not be ejected even after the EJECT command has been received depending on error status. In this case, turn the unit power OFF and ON.

Setup Menus
The PDW-700 has setup menus for making various settings and adjustments. The setup menus of this unit include the USER menu, USER MENU CUSTOMIZE menu, ALL menu, OPERATION menu, PAINT menu, MAINTENANCE menu, FILE menu, DIAGNOSIS menu and SERVICE menu. The setup menus are displayed on the viewfinder of this unit.

MENU ON/OFF switch
Use this switch to display the setup menu. When the lid is closed, the switch is set to the OFF position.
ON : Displays the setup menu.
OFF : Exits the setup menu.

MENU CANCEL/PRST/ESCAPE switch
Use this switch to cancel the setup of the items that are selected by the setup menu, or return to the initial setup when the MENU ON/OFF switch is in the ON position. CANCEL/PRST : Cancels the executed setup or returns to the initial (PRST) setup. ESCAPE : Returns to the menu hierarchy one level higher.
STATUS ON/SEL/OFF switch
Use this switch to show or to clear the setup displays in order to confirm various settings and statuses when the MENU ON/OFF switch is in the OFF position. ON/SEL : Shows the various settings and status check displays for about 10 seconds. Each press of this switch turns over the display page. OFF : Clears the display that is selected by ON/SEL.

MENU knob
When rotated : Moves to the other pages or items, or changes the setup value.
When pressed : Enters the page set mode or the setup value modification mode.
Operating procedure
1. Set the MENU ON/OFF switch to ON.
2. To move to another page, rotate the MENU knob.
3. To move to another item, rotate the MENU knob.
NOTE
Pressing the MENU knob enters the setup value modification mode.
4. To modify a setup value, rotate the MENU knob.
5. Set the MENU ON/OFF switch to OFF to exit the setup menu.

How to Display the SERVICE Menu
Method 1
Set the switch S402-1/AT-177 board to the ON position.

Method 2
# Select the DIAGNOSIS menu D00 CONTENTS page.
# While pressing the MENU knob and the ASSIGN1 switch simultaneously, set the MENU ON/OFF switch from OFF to ON. (However, if the switch S402-2/AT- 177 board is set to ON, or if the switch S400/AT-177 board is OFF, this method is disabled).

TOP Menu
While pressing the MENU knob, set the MENU ON/OFF switch to ON. Then the TOP menu appears. However, the TOP menu is not displayed when the switch S400 (TOP MENU selection)/AT-177 board is in the OFF position.

Digital Hours Meter
The hours meter has six types of display mode. The operation hours or operation count of the PDW-700 can be accumulated for each mode and displayed on the viewfinder.
The hours meter can be reset as desired.
Use the hours meter as a reference for periodic inspection.
The display can also be checked on the HOURS METER page of the DIAGNOSIS menu (Cannot be reset in the DIAGNOSIS menu). Display and reset are carried out by using the HOURS METER 2 page in the SERVICE menu.

Display Method and Reset Methods
Enter to SERVICE Menu” for the display of the SERVICE menu.
Reset Methods
1. Display the SERVICE menu.
(TOP MENU is displayed on the viewfinder screen.)
2. Select “SERVICE” from the TOP MENU and press the MENU knob.
3. Rotate the MENU knob to scroll the screen up to HOURS METER 2, and press the knob.
4. Rotate the MENU knob to move the cursor onto RESET METER , and press the knob. Move to the RESET METER screen.
5. Rotate the MENU knob to move the cursor to the desired hours meter.
6. Press the MENU knob. The accumulated time of the selected hours meter is reset.