Sony MZ-NF810CK Service Manual - Page 18

MZ-NF810/NF810CK SECTION 5 ELECTRICAL ADJUSTMENTS Outline • In this set, automatic adjustment of CD and MO can be per- formed by entering the test mode. However, before starting automatic adjustment, the memory clear, power supply adjustment, and laser power check must be performed in the manual mode. • A key having no particular description in the text, indicates a set key. • For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same. 2. Press the X key. Remote commander LCD display 021 ResOK? 3. Press the X key once more. Remote commander LCD display 021 R e s * * * Precautions for Adjustment 1. Adjustment must be done in the test mode only. After adjusting, release the test mode. 2. Use the following tools and measuring instruments. • Test CD disc TDYS-1 (Part No. : 4-963-646-01) • SONY MO disc available on the market • Digital voltmeter • Laser power meter LPM-8001 (Part No. : J-2501-046-A) • Thermometer (using the Temperature Correction) • Personal computer • USB cable 3. Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J951). 4. Switch position HOLD switch ON Adjustment Sequence 1. NV Reset (item number: 021)  (EEPROM clear)   r  2. Temperature Correction (item number: 015)   Manual Mode r 3. Power Supply Manual Adjustment    r 4. Laser Power Check    r 5. CD Overall Adjustment (item number: 031)   r  Overall Mode 6. MO Overall Adjustment (item number: 034)   r 7. RESUME Clear (item number 043)   Manual Mode r  8. Rewriting the Patch Data (at replacement of the MAIN board) r 9. Rewriting the NV values NV Reset • Setting Method of NV Reset 1. Select the manual mode of the test mode, and set item number 021 NV Reset (see page 14). Remote commander LCD display 021 ResNV CC NV reset (after several seconds) 021 R e s e t ! 4. Press the xCANCEL/CHG key to quit the manual mode, and return to the test mode (display check mode). Temparature Correction • Adjustment Method of Temperature Correction 1. Select the manual mode of the test mode, and set the item num- ber 015 (see page 14). Remote commander LCD display 015 SetTmp ** **: Adjusted value 2. Measure the ambient temperature. 3. Adjust with [VOL +] or [VOL --] key so that the adjusted value (hexadecimal value) becomes the ambient temperature. (Initial value : 19h = 25˚C, Adjusting range : 80h to 7fh (-128˚C to +127˚C)) 4. Press the X key or press the key on the remote commander to write the adjusted value. Power Supply Manual Adjustment • Adjustment sequence Adjustment must be done with the following steps. 1. VC1_LOW (PB) adjustment (item number : 741) 2. VC1_HIGH (REC) adjustment (item number : 742) 3. VC2_LOW adjustment (item number : 743) 4. VC2_HIGH adjustment (item number : 744) 5. REG1 adjustment (item number : 745) 6. REG3_LOW1 adjustment (item number : 747) 7. REG3_LOW2 adjustment (item number : 748) 8. REG3_HIGH adjustment (item number : 749) 9. VREC_LOW (X2 speed) adjustment (item number : 751) 10. VREC_MIDDLE (X4 speed)adjustment (item number : 752) 11. VREC_HIGH (HEAD MOTOR) adjustment (item number : 753) 12. CHGV_LOW adjustment (item number : 755) 13. CHGV_HIGH adjustment (item number : 756) 14. CHGI_LOW (current) adjustment (item number : 757) 15. CHGI_HIGH (current) adjustment (item number : 758) • Setting Method of Power Supply Manual Adjustment 1. Make sure that the power supply voltage is 3V. 2. Select the manual mode of the test mode (see page 14). 3. Set item number. Note: Power supply adjustment auto item feed mode (page 23) is available to perform the temperature Correction and Power Supply Adjustment without entering the manual mode. 18