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 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.
Operations | Details found in: |
Communications between Interface IC201 and Syscon IC202 on the serial bus. | Power Control section |
Front panel blue Digital Dolby indicator lights. | Power Control section |
Communications with other ICs on the parallel bus. | Parallel Data Communications section |
SONY DVD appears on the fluorescent display. | Power Control section |
Sensors are checked and the Transport is returned to the initial state (tray is closed, sled goes to home position). | Mechanism section |
Sony DVD logo appears on the monitor (OSD) | See no logo problem listed below |
Search for a disc is initiated using the focus search operation and other servos | Use the Test Mode section in the service manual to test the Laser,Focus,Spindle and Trackingservos. Then see the problem servo section |
NO DISC is displayed in the fluorescent display | Serial Data Communications / Power Control section |
GENERAL PROBLEMS
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.
- 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).
Interrupt pulse From | Through IC601 | To |
ARP2 IC303/pin 86 (Wait) | In pin 108 (arpwt) Out pin 157 (wait) | |
A/V Decoder IC401/pin 198(wait) | In pin 72 (avdwt) Out pin 157 (wait) | IC202/pin 19 (Ready) |
A/V Decoder IC401/pin 196 (interrupt) | Direct | IC202/pin 95 (interrupt) |
Interface IC201/pin 78 (CN006/pin 2) | In pin 22 (interrupt) Out pin 155 (Interrupt 3) | IC202/pin 88 (interrupt) |
ARP2 IC303/pin 83 (Interrupt) | In pin 107 (interrupt) Out pin 156 (Interrupt 1) | IC202/pin 94 (interrupt) |
Servo IC701/pin 128 (Interrupt) | In pin 107 (interrupt) Out pin 156 (Interrupt 1) | |
EEProm IC201/pin 1 (busy) | In pin 25 Out pin 155 (Interrupt 3) | IC202/pin 88 (interrupt) |
DSP IC501/pin 55 (Interrupt 0) | IN pin 29 Out pin 155 (Interrupt 3) | |
DSP IC501/pin 56 (Interrupt 1) | IN pin 30 Out pin 155 (Interrupt 3) |
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
NO DVD [CD-PB 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. The emergency code list description is in the DVP-S330/S530/S550/S705 service manual on page 6-10E. The front panel customer code errors are preceded by a C and listed on the manual.
Use the test mode to manually play the DVD disc by activating servos 1-6 individually.
The minimum (marginal) eye pattern amplitude is 0.8Vp-p @ CN012/pin 1. Clean lens or replace laser. Follow eye pattern into ARP2 IC303/pin 17 (1.4Vp-p) which should produce less than 0.5Vdc at IC303/pin 57 if the PLL clock is able to lock to the data. Insufficient IC303/pin 17 input level will prevent a lock and so will a defective IC303.
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 DISC 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 (Test mode/Drive Manual Operation/
- Manual Adj/Tilt Position).
- 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. 4. 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).