SONY HCD-M90
Service Manual

HCD-M90

Ver 1.1

The following menus are normally not used. 3. 4. 5. Track/Layer Jump Manual Adjustment Auto Adjustment

desired error number from the ten-keys on the remote commander. The upper two columns show the accumulated turn-on hours of the optical laser unit. The �minute� and the lower data are truncated. Clearing the Error Histories � Clearing the laser turn-on hours data Press the [DVD DISPLAY] and [CLEAR] keys on the remote commander in this order. Both of the CD laser data and DVD laser data are cleared. � Clearing the error occurrence history data Press the [DVD TOP MENU] and [CLEAR] keys on the remote commander in this order. � Initializing the setups Press the [DVD MENU] and [CLEAR] keys on the remote commander in this order. When the message �Set Up Initialized� is displayed, it indicates that the setups are initialized. The screen returns to the EMG display screen soon. How to Read the Eror Occurrence History Data
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The persons who do not know well about these menus should not use them. 6. Memory Check
EEPROM Data1 CD xx xx xx xx -� DL �LCD SL L0 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx L1 xx xx xx xx xx xx xx xx

Focus Gain TRK. Gain FCS Balance Focus Bias

TRV. Offset xx xx L. F. Offset xx xx EQ Boost xx xx Mirror Time xx xx _DOWN: Next Data CLEAR: Default Set EEPROM Data1 CD RF Jitter xx RF Level xx FE Level xx FE Balance xx TRV. Level xx Analog FRSW xx PLL DacGain xx _ UP : Prev Data CLEAR: Default Set

1.

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-� DL �LCD SL L0 -xx xx -xx --xx --xx --xx -xx xx xx xx xx xx

L1 xx ----xx xx

1 Emergency code No. 2 Not used (The codes that are used for debugging during program design are displayed here. They are not related to the error occ urrence history.) 3 Order of error occurrence (1 to 9) Emergency Code Table 10. Communication error with RF AMP (IC001) on the RF-240 board. 11. Servo lock of focus, tracking and spindle servos are lost. 12. Communication error with EEPROM (IC101) on the DVD board. 13. Hours meter data write error in EEPROM (IC101) on the DVD board. 14. Communication error with servo DSP (IC302) on the DVD board or defective servo DSP 20. Tilt and sled servo initializing error. The laser unit does not return to the initial position. 21. Tilt servo operation error. 22. The move request to illegal position is issued from system control to the tilt servo. 23. Error in the tracking balance gain adjustment. 24. The move request to illegal position is issued from system control to the sled servo. 30. Error in the tracking balance adjustment. 31. Error in the tracking gain adjustment. 32. Error in the focus balance adjustment. 33. Error in the focus bias adjustment. 34. Error in the focus gain adjustment. 35. Error in the tilt servo adjustment. 36. Error in the RF equalizer adjustment. 37. Error in the RF group delay adjustment 38. Amount of jitter upon completion of adaptation adjustment is excessive. 40. Focus servo does not lock. 41. Focus jump is not possible with the dual layer (DL) disc. 50. CLV (spindle) servo does not lock. 51. Spindle does not stop. 60. The seek request to the non-existent address is issued from system control using the DVD disc.

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This screen displays current servo adjusted data stored in the EEPROM. Though adjusted data can be initialized with the [CLEAR] key on the remote commander, they cannot be restored after initialization. So, before clearing, make a note of the adjusted data. For reference, the drive has been designed so that the gain center value is 20 and offset value is 80. Other values will be in a range of 10 to 80. If extreme value such as 00 or FF is set, adjustment will be faulty. In such a case, check for disc scratch or cable disconnection, then perform adjustment again. Emergency History
### EMG. History ### CD xxxxxxxh DVD xxxxxxxh 1. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Select: 1 � 9 Scroll: UP/DOWN (1: Last EMG.) Exit: RETURN Laser Hours

Press the [4] key on the remote commander of the emergency history mode to display the servo error occurrence history. Press the M or m keys on the remote commander to scroll the history data in the range of the most recent error �1� to the error �10�. You can also type the

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