Sanyo PLC-EF31 Service Manual

Also see for PLC-EF31: Owner's manual Service manual

Contents

-38-1. Voltage adjustmentEquipment Digital voltmeterConnections + K6D(2)- chassis groundAdjustment:Adjust the voltage of K6D to 6.35± 0.05V DC with the VR652.2. AV Video signal adjustmentsEquipment OscilloscopeInput mode AVInput signal 16 step gray scale signalPicture condition NormalSet the image to "Service mode."2-1. AV Green Video adjustmentConnections : + TP211 or TP5182 / - chassis ground.Adjust each item for below values with the Volume + and - buttons.Group No. Adjustment part. Adjustment or adjustment value.1010- 0 Amplitude-A in a figure. 0.7± 0.05Vp-p1010- 1 Pedestal level and black level. Make it the same level.2-2. AV Red Video adjustmentConnections : + TP201 or TP5181 / - chassis ground.Adjust each item for below values with the Volume + and - buttons.Group No. Adjustment part. Adjustment or adjustment value.1010- 2 Amplitude-A in a figure. 0.7± 0.05Vp-p1010- 3 Pedestal level and black level. Make it the same level.2-3. AV Blue Video adjustmentConnections : + TP221 or TP5183 / - chassis ground.Adjust each item for below values with the Volume + and - buttons.Group No. Adjustment part. Adjustment or adjustment value.1010- 4 Amplitude-A in a figure. 0.7± 0.05Vp-p1010- 5 Pedestal level and black level. Make it the same level.Black LevelPedestalLevelANote : The following adjustment is the adjustment item for Assembly power.The test point exists on the Assembly power.1. Voltage adjustment. The following adjustments are the adjustment item for Terminal board-AV. The adjustment data is stored to Terminal board-AV (IC2143). Thetest points exist on the Terminal board-AV and the Assembly main.2. AV Video signal adjustments.3. 3DNR-PLL Lock check.4. AV Color and Tint adjustments. The following adjustment is the adjustment item for Terminal boardcomponent. The adjustment data is stored to Terminal board-component(IC2082). The test points exist on the Terminal board component andthe Assembly main.5. Component Video signal adjustments. The following adjustment is the adjustment item for Assembly subpower. But the adjustment data is stored to Assembly main (IC1811 andIC871). The test points exist on the Assembly optical fan-net and theAssembly sub-power.6. Fans driving voltage adjustments. The following adjustments are the adjustment item for Assembly main.The adjustment data is stored to Assembly main (IC1811 and IC871). Thetest points exist on the Assembly main.7. Video center DC adjustments.8. PSIG signal adjustments.9. PC pedestal level adjustments.10. PC contrast adjustments.11. AV pedestal level adjustment.12. AV contrast adjustments.13. Panel driving signal adjustments -AV.14. Panel driving signal adjustments -PC.15. Flicker reduction.16. White balance adjustments.17. Unevenness color correction.Location of test points can see it on"PWB parts location diagrams."(P1, P3 and P4) Electrical adjustments