SONY MZE77
Manual de Servicio

SECTION 5 ELECTRICAL ADJUSTMENTS
Outline
� In this set, automatic adjustment of CD and MO can be performed by entering the test mode. (See page 9) However, before starting automatic adjustment, the memory clear and power adjustment must be performed in the manual mode. � A key having no particular description in the text, indicates a remote commander key.

NV Reset
� Setting method of NV reset 1. Select the manual mode of test mode, and set mode number 021NV Reset. (See page 10)
LCD display

021 ResNV
2. Press the X key.
LCD display

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) � Recorded MO disc PTDM-1 (Part No. : J-2501-054-A) Available SONY MO disc (recorded) � Digital voltmeter 3. Unless specified otherwise, supply DC 1.2V from the DC IN jack. 4. Switch position AVLS switch ................................................ NORM DIGITAL SOUND PRESET switch ........... OFF HOLD switch ............................................... OFF

021 ResOK?
3. Press the X key once more.
LCD display

021 Res***
NV reset (after several seconds)

021 Reset!
4. Press the x key to quit the manual mode, and activate the test mode.

Adjustment Sequence
Adjustment must be done with the following steps. 1. NV Reset (Memory clear) r 2. 3. 4. 5.    Digital Sound Preset Setting  Manual Mode r   Power Supply Manual Adjustment  r CD Overall Adjustment   r  Overall Mode MO Overall Adjustment  

Digital Sound Preset Setting
1. Select the manual mode of the test mode, and set the item number 045. (See page 10)
LCD display

045 D.S.P **
��: Adjustment value of digital sound preset set up. 2. Adjust [VOL +] key so that the adjustment value becomes 01.
LCD display

045 XXXS01
3. Press the X key to write the adjusted value.

Power Supply Manual Adjustment
� Adjustment sequence Adjustment must be done with the following steps. 1. Vc PWM Duty (L) adjustment (item number: 762) r 2. Vrem PWM Duty (L) adjsutment (item number: 764) r 3. Vc PWM Duty (H) adjustment (item number: 765) r 4. Vrem PWM Duty (H) adjustment (item number: 766)

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