SONY HCDS550
Service Manual

HCD-S550/S880

0-2-3. ROM Check Sum The revision number of ROM (IC204) that the program for the DVD system processor (IC206) is stored. 0-2-4. Model Type Model name is displayed. (DAV-S550 or DAV-S880) 0-2-5. Region Model destination code is displayed. (2 digits number) 0-3. EEPROM Check 0-3-1. Sampling Check EEPROM check at every 64 words. It compares read data with write data of each address. When there are discrepancies between two data, it displays error. 0-3-2. Detail Check EEPROM check at every 1 word. It compares read data with write data of each address. When there are discrepancies between two data, it displays error. 0-4. GP I/O Check Pull up/down setting check of the DVD system processor (IC206) pin 150, 151 and 154 (for clock setting port). 0-5. SD Bus Check SD bus data check between DVD decoder (IC701) and D-RAM (IC706). 0-6. Video Check Output the color bars for video level adjustment. 0-7. Audio Check Output the test signal (1kHz sine wave) for 5.1 CH test.

by pressing the [RETURN] button on the remote commander.
Note: During adjustment of each disc, the measurement for disc type judgment is made. As automatic adjustment does not judge the disc type unlike conventional models, take care not to insert wrong type discs. Also, do not give a shock during adjustment.

1-1. DVD-SL (single layer) Press the [1] key on the remote commander and insert a DVD single layer disc following the message. Then the adjustment will be made through the steps below, then adjusted values will be written to the EEPROM. DVD Single Layer Disc Adjustment Steps: 1. Sled tilt reset 2. Disc check memory SL 3. Wait 300 msec 4. Set disc type SL 5. LD on 6. Spindle start 7. Wait 1 sec 8. Focus servo on 0 9. Auto track offset adjust 10. CLVA on 11. Wait 500 msec 12. Tracking on 13. Wait 1 sec 14. Sled on 15. Check CLV on 16. Auto LFO adjust 17. Auto focus offset adjust 18. Auto tilt position adjust 19. Auto focus gain adjust 20. Auto focus offset adjust 21. EQ boost adjust 22. Auto loop filter offset adjust 23. Auto track gain adjust Search Check 24. 32 track jump forward 25. 32 track jump reverse 26. 500 track jump forward 27. 500 track jump reverse 28. All servo stop 29. EEP copy loop filter offset 1-2. CD [2] key on the remote commander and insert a CD disc Press the following the message. Then the adjustment will be made through the steps below, then adjusted values will be written to the EEPROM. CD Adjustment Steps 1. Sled tilt rest 2. Disc check memory CD 3. Wait 500 msec 4. Set disc type CD 5. LD on 6. Spindle start 7. Wait 500 msec 8. Focus servo on 0 9. Auto track offset adjust 10. CLVA on 11. Wait 500 msec 12. Tracking on 13. (TC display start) 14. Wait 1 sec 15. Jitter display start 16. Sled ON 17. Check CLV on

DRIVE AUTO ADJUSTMENT On the Test Mode Menu screen, press the [1] key on the remote
commander, and the Adjustment Menu will be displayed. ## Drive Auto Adjustment ## Adjustment Menu 0. 1. 2. 3. ALL DVD-SL CD DVD-DL

1.

Exit: RETURN

Normally, [10/0] is selected to adjust DVD (single layer), CD and DVD (dual layer) in this order. But, individual items can be adjusted for the case where adjustment is suspended due to an error. In this mode, the adjustment can be made easily through the operation following the message displayed on the screen. The disc used for adjustment must be the one specified for adjustment. 1-0. ALL Press the [10/0] key on the remote commander, and the servo set data in EEPROM will be initialized. Then, 1. DVD-SL disc, 2. CD disc and 3. DVD-DL disc are adjusted in this order. Each time one disc was adjusted, it is ejected. Replace it with the specified disc following the message. You can finish the adjustment

21