Zenith R50V26 Service Manual

Also see for R50V26: Operating guide

Contents

Zenith R50V26 Service Manual Manual pdf 45 page image

SERVICE ADJUSTMENTSPV154 - 923-03506 3-21 ZP26/28 - SERVICINGOK, repeat steps 5 through 12.12. Press the MENU key on the remote to Exit ServiceMenu. Remember: When adjusting the Screen con-trols, after the Cut Off adjustment has been com-pleted, never adjust the controls clockwise. Al-ways adjust counter clockwise. This lengthens tubelife.CHASSIS HORIZONTAL PHASE (FINE) ADJUSTMENTADJUSTMENT PREPARATION:1. Cut Off, DCU Phase adjustments should be finished.2. Video Control: Brightness 90%, Contrast Max.ADJUSTMENT PROCEDURE NORMAL MODE3. Receive any NTSC crosshair signal.4. Screen Format is NORMAL.5. Press the SERVICE ONLY switch on the convergencePWB and display the Digital Convergence Cross-hatch pattern.6. Mark the center of the Digital Convergence Cross-hatch Pattern with finger and press the SERVICEONLY switch to return to normal mode.7. Enter the I 2C Bus alignment menu and select ItemH POSI and adjust the data so that the center ofVideo matches the location of the Digital Cross-hatch pattern noted in step {4}.8. Exit from the I 2C Menu.16X9 HD Mode Adjustment: NOTE: I2C Service MenuCan Not be entered in the 16X9 HD Mode.9. Receive any 2.14H signal.10. Change Screen Format 16X9 HD mode.11. Press the SERVICE ONLY switch on the deflectionPWB and display the Digital Convergence Cross-hatch pattern.12. Mark the center of the Digital Convergence Cross-hatch Pattern with finger and press the SERVICEONLY switch to return to normal mode.13. Enter the I2C Bus alignment menu and select Item[9] H POSI14. Press SELECT key on R/C. (H POSI option is changedto HD mode. H POSI H appears). H POSI of 16X9HD mode data can be changed.15. Adjust the data up or down slightly.16. Exit from the I 2C Menu.17. Change Screen Format to 16X9 HD mode.18. Confirm that the Center of Video matches the Cen-ter of the DCU Crosshatch determined in step (12).19. If center is not correct, Repeat steps (12) through(18) until center is matched.NOTE: To enter the I2 C Bus alignment menu, with PowerOff, press the INPUT button and hold it down, thenpress the POWER button. I2 C adjustment menu willappear.CHASSIS INTELLISENSE “PATTERN SET UP”NOTE: This instruction should be applied when a new DCUis being replaced.NOTE: This instruction shows how to set up the patternposition for Intellisense. Each model has a specificset up pattern position.ADJUSTMENT PREPARATION:· Receive NTSC RF or Video Signal.· With Power Off, Press and HOLD the SERVICE ONLYbutton on the Convergence/Focus PWB, then pressthe Power On/Off button and release, pictureappears, then release Service Button to bring upInternal Crosshatch.NOTE: After entering the DCAM, each press of the ServiceOnly Switch will toggle between Video mode andDCU grid.· Press the C SKIP (twice) to read the old ROM data,DCU Grid returns to normal with convergence cor-rection.ADJUSTMENT PROCEDURE1. Make sure the Remote is in TV mode.2. Press the (-) key on R/C. (One additional line ap-pears near the top and bottom.3. Change Remote to VCR mode.4. Press the (-) key. The PATTERN mode is displayedas shown on the right.———>5. Change Remote back to TV mode.6. Use the 6 Key to rotate Arrow. Arrow rotates clock-wise with each press on the 6 Key.7. Use the following Keys to switch color of patterns.o Display : GREENo 0 : REDo Source : BLUE8. Press the ? or ? Cursor to change the Pattern Po-sition Data in horizontal Direction to match thechart below.9. Press the [?] or [?] Cursor keys to change the Pat-tern Position Data in Vertical Direction to matchthe chart below.10.Press the MULTI key 2 times to write the changeddata into EEPROM. o First press, ADJ PAT-TERN ROM WRITE ? is displayed for alarm. oSecond press writes data into EEPROM. Green dotsappear after completion of operation.11.Press the MUTE button 2 times to return to theDCU grid.12. Power set off.