SONY - DVP-S530D _ TROUBLESHOOTING _ SERVICE HELP

TROUBLESHOOTING

• When the model DVP-S530 DVD player is first plugged in and turned on, several things occur before “NO DISC” is displayed on the front panel. One operation is performed after the next until it reaches the end of the chain. A failure will prevent it from reaching the end and often a side trip is taken to protect the unit by shutting down. Finding out where in the chain the unit has stopped will help locate the failure. Below is a general description of the start-up operations followed by problems and answers. Use the information below as a troubleshooting guide to remain on track throughout your testing.

NO POWER ON

• Unplug unit and press the POWER button to discharge the power supply.
• Watch the front panel Dolby Digital indicator while plugging the unit into AC. If there is Interface IC201 to Syscon IC202 serial communications, the blue indicator will light momentarily. See the Power Control section for details.  To check the Interface IC201 alone (without IC202), use the procedure in the test mode section.
• Press the power ON button. If the unit does not remain ON, there is a loss of communication between Syscon IC202 and a slave IC or the
  servo IC701 failed to reset the mechanism.  Communications occur when Syscon IC202 Chip Selects several ICs, sends data and waits for an interrupt reply from each. Use the scope to look for a low interrupt reply pulse at these ICs highlighted (in bold) while repeatedly pressing the power button to reinitiate the sequence.
• After the brief communications above, the servo IC701 must initialize the mechanism by closing the tray and moving the sled to home position.
  When completed, IC701 replies to Syscon IC202. If no reply is received within approximately 2 seconds of powering ON, IC202 instructs Interface IC201 to power down (set OFF). For details, see the Mechanism section, Tray Motor Drive section and the Initial Sled Drive section.

NO DVD OSD LOGO

The DVD initial OSD power ON logo is stored in Flash ROM IC205. This information takes the following path to become video that outputs the AU212 board.

• Flash ROM IC205 (storage)
• Syscon IC202 (extraction and processing)
• ARP2 IC303 (pass through)
• A/V Decoder IC401 (sub-picture generation)
• Video Buffers on the AU212 board

     In the test mode (Syscon Diagnosis/A/V Decoder test), the A/V Decoder can generate a main picture (color bar) or a sub picture (“CHG_COLCON”) from the flash ROM data. Unfortunately they take the same path as the logo, finally separating inside the A/V decoder IC401. Therefore if the logo, test bars or test sub picture does not appear, the problem may be the storage area in Flash ROM IC205. If none appear, the path from Flash ROM to A/V Decoder IC401 is broken.

NO DVD PLAYBACK {CD PLAYBACK OK}

• Use the test mode to perform the DVD auto adjustments using the DVD test disc.
• Use the test mode to examine the OSD emergency code entries for failures.
• Use the test mode to manually play the DVD disc by activating servos
• The minimum (marginal) eye pattern amplitude is 0.8Vp-p @ CN012/ pin 1. Clean lens or replace laser.

This DVD player uses the laser and focus servos to identify the DVD.  One may not be working. From the test mode, manually turn on the laser and focus search servos (Drive Manual Operation/Servo Control) for observation.

• Laser test – using a light meter measure the laser light (never look directly at the laser) and measure voltage across R006 (laser current).  1Vdc or more across R006 means the laser is at the end of life.  The light measurement is quick but not a definitive test. The current measurement is better.
• Focus search test – Scope FE (test connector CN012/pin 3) for 1.5Vpp minimum sine wave used for disc layer ID. Scope MIRROR output at CN002/pin 16 for 3Vp-p pulses during the search. The Mirror signal is an amplified the PI signal. Both come from RF Amplifier IC001.

NO DVD DL PB {OTHER DISCS PB OK}

• Perform the test mode’s “Drive Auto Adjustments” using a Single, and then a Dual layer disc, to reload data into the EEProm IC201.
• Check the operation of the tilt circuit in the test mode by seeing if the tilt incline gear moves manually. 
• A single layer DVD Eye pattern’s minimum level is 0.8Vp-p at the MB-85 board test connector CN012/pin 1. The laser level is affected by dirt/oil in the lens and the tilt circuit. A new laser will output approximately 1.2Vp-p.

NO DISC PB

• Use the test mode to perform the CD auto adjustments.
• Use the test mode to examine the emergency code entry for failures.
• Use the test mode to manually PB the CD disc by activating servos 1- 6 individually to see if one is faulty.
• The minimum (marginal) eye pattern amplitude is .8Vp-p @ CN012/pin 1. Clean lens or replace laser. Follow eye pattern into ARP2 IC303/pin 19 (1.4Vp-p) which should produce less than 0.6Vdc at IC303/pin 57 if PLL clock is locked (3V= no lock, 0V = defective IC or external short).

FOCUS

• Mechanical focus of the laser beam on the information layer of the disc is accomplished by moving the laser’s objective (final) lens closer to or away from the disc. Applying a current to a coil that is attached to the lens controls the lens position. When the lens moves up and down, so does its corresponding focus point at the disc area. Focus is found when the laser’s focus point rests on the information layer of the disc.

SEARCH

• There is a large and a small lens movement associated with focus. The large up and down lens movement is used to locate a disc by moving the focus point until it finds the disc layer. This large lens movement is called focus search and can be seen by observing the lens after the tray moves in.
• Focus search employs five ICs and the focus coil. System Control IC202initiates focus search by sending data to IC701 which makes voltage to move the lens. The results of the search are sent as data from IC701 back to IC202 on the parallel bus so a stop search command from IC202 can follow.

FOCUS SEARCH END

• Focus search concludes when focus is found or when the search cycle is over and no disc was found. Using A to D laser diode signals from the optical base unit electrically identifies the mechanical focus on the disc layer. RF Amp IC001 combines them to output PI (pin 29) and FE (pin 40) signals. Both are needed to find the focus position and stop focus search. PI identifies a disc when the signal goes high. FE identifies the focus position as this line rises and crosses 1.8V on the way down during search.
• Once the focus position has been found, the lens search operation ends and the servo operation begins. IC701 makes the crossover by informing
  System Control IC202 the disc layer has been found when FCSON from IC701/pin 39 goes high. It remains high as long as focus is maintained by
  servo IC701.