Friday, July 22, 2016

Unlock – error codes – Reset - Firmware update - Panasonic SA PT250 – DVD home theater sound system

Power Supply: AC 230 V, 50 Hz
Power Consumption: 125 W
Front Ch: 125 W / Channel (3 Ω)
Center Ch: 125 W / Channel (3 Ω)
Surround Ch: 125 W / Channel (3 Ω)
Lock Function
This function prevents discs from being lost when the unit is used for sales demonstrations by disabling the disc eject function.  "LOCKED" is displayed on the unit, and ordinary operation is disabled.
Prohibiting removal of disc
1. Select the DVD/CD function.
2. At POWER ON condition, press and hold down the “Stop” button and the power button on the player for at least three seconds.
(The message, “___LOCKED_” appears when the function is activated.)
Note:  OPEN/CLOSE is invalid and the player displays “___LOCKED_” while the lock function mode is entered.
Prohibiting operation of selector and disc
1. Select the DVD/CD function.
2. At POWER ON condition, press and hold down the “Play” button and the power button on the player for at least three seconds.
(The message, “___LOCKED_” appears when the function is activated.)
The following buttons are invalid and the player displays “___LOCKED_” while the lock function mode is entered.
Cancellation
The lock can be cancelled by the same procedure as used in setting. ("UNLOCKED" is displayed on cancellation. Disconnecting the power cable from power outlet does not cancel the lock.)
Error codes
DVD Self Diagnostic Function-Error Code
Mechanism Error Code Table
DVD Module Error Code Table
Power Supply and ECC Error Code Table
USB Error Code Table
Recovery after the DVD player is repaired
• When the FLASH ROM IC or DVD Module P.C.B. is replaced, carry out the recovery processing to optimize the drive.  Playback the recovery disk to process the recovery automatically.
• Recovery disc (Product number: RFKZD03R005) [SPG]
• Performing recovery process
1. Load the recovery disc RFKZD03R005 on to the player and run it.
2. Recovery is performed automatically. When it is finished, a message appears on the screen.
3. Remove the recovery disc.
4. Turn off the power.
5. Initialize the player.
Firmware version-up of the DVD player
• The firmware of the DVD player may be renewed to improve the quality including operability and playability to the substandard discs.processing to optimize the drive.  The recovery disc has also firmware version-up.
• After version-up, recovery processing is executed automatically.
• Part number of the recovery disc for version-up will be noticed when it is supplied.
• Updating firmware
1. Load the recovery disc on to the player and run it.
2. Firmware version of the player is automatically checked. Appropriate message appears whenever necessary.
3. Using remote controller´s cursor key, select whether version updating is to be done or not. (Selection of Yes/No)
4. a. If Yes is selected, version updating is performed.
b. If No is selected, only recovery is performed.
5. a. When updating is finished, remove the disc according to the message appearing on the screen.
b. Remove the disc according to the message appearing on the screen.
6. Turn off the power.
[If the AC power supply is shut out during version-up due to a power failure, the version-up is improperly carried out.  In such a case, replace the FLASH ROM IC and carry out the version-up again.]
DVD Module P.C.B. Reset
·
When after replacing FLASH ROM IC or DVD Module P.C.B., FL displays error code “ DVD F897”. This means the unit is not initialized properly and the following process needs to be carry out.
· Procedures:
1. Press on remote control while pressing “STOP” button on main unit. (To enter into initialization)
2. FL display show “INIT”
3. While still pressing “STOP” button on main unit, press “ENTER” on remote control. (To reset the unit)
4. FL will display “RESET” before FL display will change to TOC reading again.
5. Power off unit. Unplug the AC cord.
6. Power on the unit. It should be no problem. If problem persist check on the DVD Module P.C.B. or FLASH ROM IC.

Panasonic SA PT250EE HTS – Optical pickup adjustment – Service mode adjustments – Region code and language select

Panasonic SA PT250EE Home Theater System - How to enter service mode - Troubleshooting table - How too change the language - how to adjust the optical pickup
Optical pickup tilt adjustment
While pressing STOP button on the main unit, press "5" on the remote control unit.
2. Confirm that "J_xxx/yyy_zz" (display1/display2) is shown on the front display.
For your information:
"yyy" and "zz" shown to the right have nothing to do with the jitter value. "yyy" is the error counter, while "zz" is the focus drive value.
Note: Jitter value appears on the front display.
3. Play test disc T30 (center periphery).
4. Adjust tangential adjustment screw so that the jitter value is minimized.
5. Play test disc T30 (center periphery).
6. Adjust tilt adjustment screw 1 so that the jitter value is minimized.
7. Play test disc T30 (center periphery).
8. Adjust tilt adjustment screw 2 so that the jitter value is minimized.
9. Repeat adjusting tilt adjustment screws 1 and 2 alternately until the jitter value is minimized.
Important points
1. Make tangential adjustment first, and then make tilt adjustment.
2. Repeat adjusting two or three times to find the optimum point.
3. Finish the procedure with tilt adjustment.
Check after adjustment
Play test disc or any other disc to make sure there is no picture degradation in the inner, middle and outer peripheries, and no audio skipping. After adjustment is finished, lock each adjustment screw in position using screw lock.
Procedure for screw lock
1. After adjustment, remove top cover, tray, clamper base and traverse unit in this sequence.
2. Lay the traverse unit upside down, and fix adjustment screw with screw lock.
3. After fixing, reassemble traverse unit, clamp base, tray and top cover.
Important points in optical adjustment
· Before starting optical adjustment, be sure to take anti-static measures.
· Optical pickup tilt adjustment is needed after replacement of the following components.
1. Optical pickup unit
2. Spindle motor unit
3. Optical pickup peripheral parts.
[Adjustment is generally unnecessary after replacing other parts of the traverse unit. However, make adjustment if there is a noticeable degradation in picture quality. Optical adjustments cannot be made inside the optical pickup. Adjustment is generally unnecessary after replacing the traverse unit.]
Service mode - region and language select
The service modes can be activated by pressing various button combinations on the main unit and remote control unit. Below is the summary for the various modes for checking:
An error code will be canceled if a power supply is turned OFF.
*1: CPPM is the copy guard function beforehand written in the disk for protection of copyrights.
*2: CEC is the consumer electronic control used for high-level user control of HDMI-connected devices.
*3: HDCP is the specification developed to control digital audio & video contents transmission for DVI or HDMI connections.
Service mode - Factory mode - troubleshooting table
Service Mode button press combination {Click on the tables to magnify}

Acer X193w – LCD monitor – disassembly – power and scalar board circuit diagram

This monitor will appear to be non-functional if there is no video input signal. In order for this monitor to operate properly, there must be a video input signal.
The monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signals this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver" feature except the display is completely off. Pressing a key on the keyboard, or clicking the mouse restores the display.
The monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
The DDC2B is a bi-directional data channel based on the I²C protocol. The host can request EDID information over the DDC2B channel.
Disassemble procedure
> Remove the cover hinge marked in red.

> Remove the screws as following indicate to release base stand.
> Remove the back cover and regard the hook.
> Remove the keyboard.
> Remove the bezel.
> Remove the screws to remove the panel.
> Remove the screw as following indicate to remove the main board, audio board and power board.
Schematic diagram - Power and Scalar  [Click on the schematics to magnify]