Sanyo PLC-SW30 Service Manual

Also see for plc sw30 - SVGA LCD Projector: Owner's manual Specifications Service manual Service manual Owner's manual

1. Receive the 16-step gray scale computer signal withCOMPUTER IN [RGB] mode.2. Enter the service mode.3. Connect an oscilloscope to test point “TPR1” (+) andchassis ground (-).4. Select item no. “7” and change data value to adjustwaveform “a” to be minimum amplitude.5. Connect an oscilloscope to test point “TPG1” (+) andchassis ground (-).6. Select item no. “8” and change data value to adjustwaveform “a” to be minimum amplitude.7. Connect an oscilloscope to test point “TPB1” (+) andchassis ground (-).8. Select item no. “9” and change data value to adjustwaveform “a” to be minimum amplitude.(a)White Level-23-● Circuit AdjustmentsCAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the follow-ing adjustments except requiring the readjustments in servicing otherwise it may cause loss of per-formance and product safety.Electrical Adjustments[Adjustment Condition]● Input signalVideo signal .......................... 1.0Vp-p/75Ω terminated, 16 steps grayscale, white 100% and white 50% pat-tern (Composite video signal)Computer signal .................... 0.7Vp-p/75Ω terminated, 16 steps grayscale pattern (SVGA)Component Video signal........ 0.7Vp-p/75Ω terminated, 16 steps grayscale, white 100% and black 0% pat-tern (480i format and 480p format)● Picture control mode ................ “STANDARD” mode unless otherwisenoted.Note:* Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the servicedata.White 100% Black 100%x PC Gain adjustment16 steps gray scale pattern1. Receive the 16-step gray scale computer signal withCOMPUTER IN [RGB] mode.2. Enter the service mode.3. Connect an oscilloscope to test point “TPR1” (+) andchassis ground (-).4. Select item no. “275” and change data value to adjustthe pedestal level and black level to be the samelevel.5. Connect an oscilloscope to test point “TPG1” (+) andchassis ground (-).6. Select item no. “276” and change data value to adjustthe pedestal level and black level to be the samelevel.7. Connect an oscilloscope to test point “TPB1” (+) andchassis ground (-).8. Select item no. “277” and change data value to adjustthe pedestal level and black level to be the samelevel.Black LebelPedestal Lebelz PC Pedestal adjustment