Sony DVP-S300 Training Manual

Also see for DVP-S300: Operating instructions Operating instructions Operating instructions Operation manual Service manual

Contents

65Fourth Generation DVDThe fourth generation DVD players consist of models DVP-S350, DVP-S560, DVP-S560, DVP-S570, DVP-C660d and DVP-C670d.Symptom 4: Multiple Symptoms -1. No chroma from the S video output jack; or2. No component video (Y, B-Y, R-Y) output. The com-posite video output is OK in both cases.Cause: Output Video Buffer IC101 failureRepair ProcedureIn the following steps you will remove the MB board from under the mecha-nism deck and use the jig to operate the board and the mechanism out-side the unit. This way you can check the video signal entering the videobuffer and verify IC101’s defect.1. You can damage the laser when unplugging the laser assembly. Toprevent this, either short out the laser diode with a solder blob on theribbon cable or use an anti static mat with a wrist strap.2. Set up the jig (P/N J-6090-100A) to operate the MB board outside theunit (you have to take out the MB board anyway to replace IC101 so itwill take an extra two seconds to check the signal and prove IC101 isthe cause of this symptom).3. Press power ON, insert a disc and press the play button to keep theunit powered ON.4. Check IC101’s input signals at the extender board’s CN103 pins:Signal Level * Test point name CN103/pinComposite video 1Vp-p JL103 25S Video - Chroma 0.6Vp-p JL104 21S Video - Luminance 0.9Vp-p JL105 17Component Y 0.9Vp-p JL107 4* Typical level taken from four sample movies +0.1V.If these input signals are present at the test points of the extender boardbut not at the rear panel jacks, replace buffer IC101 on the bottom of theAI board.Alternate Test ProcedureYou can also check for chroma leaving the MB board at IC502/pin 77without disassembly. IC502 is located to the right of the tray/laser assem-bly and accessible while the player is fully assembled.IC502Tray/laser assemblyR50677 616011. Turn the DVD player ON by pressing the power button. The playerwill enter Standby (red light). Press tray open or play to power the unitON. The power supply will remain ON and the front panel display willlight.2. Within two seconds after a communications check is completed, thecolor DVD logo will appear on the TV screen. The logo is shortlyreplaced by an “Insert Disc” message on a blue stripe. If the messageis in B&W, place your scope probe at the left side of R506 behindIC502. If there is signal (chroma) present, Video Buffer IC101 on thebottom of the AI-17 board is defective. IC502/pin 77 = 0.6Vp-p, 10usec/div.PKDCH1 200mV= MTB10.0us- 0.88dv ch1-1TChromaH sync pulsesIC502/pin 77 = 0.6Vp-p, 10usec/div.