Electrical Adjustments; Outline; Precautions For Adjustment; Adjustment Sequence - Sony MZ-R70 Service Manual

Ver 1.3 2001. 01

5-1. OUTLINE

• In this set, automatic adjustment of CD and MO can be per-
formed by entering the test mode. (See page 13)
However, before starting automatic adjustment, the memory
clear, power adjustment and temperature adjustment must be
performed in the manual mode.
• The keys in the description refer to the keys on both set and
remote commander unless otherwise specified.
Though LCD display shows the LCD of the remote commander,
same contents are also displayed on the LCD of the set.

5-2. 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
• SONY MO disc available on the market
• Laser power meter LPM-8001
• Digital voltmeter
3. Unless specified otherwise, supply DC 3V from the DC IN 3V
jack.
4. Switch position
HOLD switch ................ OFF

5-3. ADJUSTMENT SEQUENCE

Adjustment must be done with the following steps.
1. NV Reset (Memory clear)
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2. Power Supply Manual Adjustment

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3. Temperature correction
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4. CD Overall Adjustment
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5. MO Overall Adjustment
SECTION 5

ELECTRICAL ADJUSTMENTS

(Part No. : 4-963-646-01)
(Part No. : J-2501-046-A)
Manual Mode
Overall Mode

5-4. NV RESET

• Setting method of NV reset
1. Select the manual mode of test mode, and set mode num-
ber 021NV Reset.
LCD display
R e s N V
021
2. Press the X key.
LCD display
R e s O K ?
021
3. Press the X key once more.
LCD display
R e s * * *
021
R e s e t !
021
4. Quit the manual mode, and activate the test mode.
5-5. POWER SUPPLY MANUAL ADJUSTMENT
• Adjustment sequence
Adjustment must be done with the following steps.
1. VC PWM Duty (L) adjustment (mode number: 762)
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2. VREM PWM Duty (H) adjustment (mode number: 763)
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3. VREM PWM Duty (L) adjsutment (mode number: 764)
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4. VC PWM Duty (H) adjustment (mode number: 765)
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5. VREM PWM Duty (H) adjustment (mode number: 766)
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6. VREM PWM Duty (L) adjustment (mode number: 767)
– 20 –
r NV reset (after several seconds)