The service screen is provided to facilitate instrument alignment and service adjustments.
Pressing a two-button combination on the front control panel of the instrument accesses the service screen.USING FRONT PANEL CONTROLS TO GET IN TO SERVICE MODE MENU
- Turn on the TV and select the channel that will be used for the alignment procedure.
- With the instrument “ON” press and hold the “Menu” button and then the “CH ▼” button.
- The TV set should immediately display the service screen Menu as shown.
- Once in the service screen use “CH▼” button on the keyboard or the down arrow on the remote control to highlight item “2 Service Alignment”.
- Press “Menu” on the keyboard or “OK” on the remote control to activate the Alignment Screen.
- Once the Alignment Screen has been activated use the “VOL►” button on the keyboard or remote to adjust the value (V: 0) to the desired value.
SECURITY CODES
When the Service Alignment Screen is first entered, the parameter ( P) will come up set at “0”, which corresponds to the security code function.
- With the parameter (P) set to “0” adjust the value (V) (using “VOL LT”or “VOL RT”) to “76”for access to the Electrical Alignments.
- Once the security code has been set, individual alignments can be accessed by pressing “CH ▲or ▼” changing the parameter (P) number.
- Once a parameter (P) has been selected for a particular alignment the “VOL LT“and“VOL RT” buttons can be used to change the value (V) of the alignments selected. Most Electrical adjustments for the DLP instrument must be done using Chipper Check.
VERTICAL & HORIZONTAL CENTRING
Vertical and Horizontal entering adjustments should only be performed after replacing the Light Engine
- Turn on the TV and select the channel that will be used for testing.
- Select the Service Screen Menu.
- Select “2 Service Alignment” item.
- Once the Service Alignment screen is displayed use the “VOL ► on the keyboard or remote to adjust parameter zero (P:0) to a value of eighty (V :80).
- With parameter zero (P:0) value at eighty (V :80) press the “CH▲” button on the front keyboard or remote control.
- This puts the instrument into the vertical and horizontal entering mode as shown below .
- This allows the technician to select one of several internally generated test patterns. These may be used for alignment or troubleshooting.
- Pressing the “Skip” or “Info” button on a remote control will bring up the test patterns one after the other.
- Pressing “Go Back” or “Reset” on the remote control will display the first test pattern.
- Pressing “Menu” on the keyboard or remote control will toggle the display between the test pattern and the tuned channel video.
- Pressing the “Power” or “On/Off” button on the keyboard or remote control will cause the instrument to exit the adjustment mode and return to the [P:0] [V:80] display.
PICTURE ADJUSTMENT [MECHANICAL]
- With the back cover removed loosen the two (2) lowest of the three (3) T20 screws holding the light engine in position.
- Turn on the TV and select the channel that will be used for testing.
- Put the instrument into the Service Alignment mode.
- Use the “VOL►”on the keyboard or remote to adjust parameter zero (P:0) to a value of eighty (V :80).
- With parameter zero value at eighty (V :80) press the “CH▲” button on the front keyboard or remote control to put the instrument into the vertical and horizontal entering mode.
- Use the “Skip” or “Info” button on a remote control to bring up the cross-hatch pattern.
- While supporting the light engine lamp enclosure back off the tension on the third upper screw until the light engine will rotate with light pressure.
- While viewing the cross-hatch on the front screen rotate the light engine so that the horizontal lines are parallel with the cabinet frame.
- Press the “Menu” button on the front panel or remote control to toggle the display from the cross-hatch to channel video. Insure that tuned video and cross-hatch pattern are displayed with proper geometry.
- Tighten the light engine screws and perform the electrical entering procedure.
- Pressing the “Power” or “On/Off” button on the keyboard or remote control will cause the instrument to exit the adjustment mode and return to the (P:0) (V :80) display .
- Pressing the “Power” or “On/Off” button on the keyboard or remote control a second time will cause the instrument to exit the Service Menu.
VERTICAL & HORIZONTAL CANTERING [ELECTRICAL]
- Turn on the TV and select the channel that will be used for testing.
- Select the Service Screen Menu.
- Select “2 Service Alignment” item.
- Use the “VOL ►”on the keyboard or remote to adjust parameter zero (P:0) to a value of eighty (V :80).
- With parameter zero value at eighty (V :80) press the “CH▲” button on the front keyboard or remote control to put the instrument into the vertical and horizontal centering mode.
- Use the “Skip” or “Info” button on a remote control to bring up the first test pattern, border crosshatch pattern.
- Use the “CH ▲or ▼” on the front panel or Up and Down arrows on a remote control to adjust the vertical positioning of the upper and lower horizontal lines.
- Adjust the lines so that they are equal distance from the edge of the protective shield frame.
- Use the “VOL Left” and “VOL Right ” on the front panel or Right and Left arrows on a remote control to adjust the horizontal positioning of the left and right vertical lines. Adjust the lines so that they are equal distance from the edge of the protective shield frame.
- Press the “Menu” button on the front panel or remote control to toggle the display from the crosshatch to channel video. Insure proper looking video display.
- Pressing the “Power” or “On/Off” button on the keyboard or remote control will cause the instrument to exit the adjustment mode and return to the (P:0) (V :80) display.
- Pressing the “Power” or “On/Off” button on the keyboard or remote control a second time will cause the instrument to exit the Service Menu.
GEMSTAR
To activate the Gemstar service menu, while in TV mode press “Menu”, then item 1 “GUIDE Plus+ Menu. Then item 2 “GUIDE Plus+ Setup. When the GUIDE Plus+ menu is displayed press “GO BACK”and then the “INFO”button on the remote control. The Gemstar Ser-vice Menu can be cleared with the CLEAR”button.