18
MZ-N910
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.
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)
• AC adaptor (3V)
• Personal computer
• USB cable
• Regulated dc power supply
• Thermometer (using the Temperature Correction)
3. Unless specified otherwise, use AC adaptor (3V).
4. Switch position
HOLD switch ............................................... ON
Adjustment Sequence
1. NV Reset (item number: 021)
(EEPROM clear)
r
2. Temperature Correction (item number: 015)
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3. Power Supply Manual Adjustment
Manual Mode
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4. Laser Power Check and Adjustment
r
*1
5. Adjustment required before Overall
Adjustment
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6. CD Overall Adjustment (item number: 031)
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Overall Mode
7. MO Overall Adjustment (item number: 034)
r
8. RESUME Clear (item number 043)
r
Manual Mode
9. Rewriting the Patch Data
(at replacement of the MAIN board)
r
10. Rewriting the NV values
Note:
“2. Temperature Correction” and “3. Power Supply Manual Adjust-
ment” can be performed continuously with turning the jog dial (up)
or pressing the
[P MODE]
key on the remote commander in the
overall adjustment mode.
NV Reset
Caution: The shipment data will be cleared without the adjusted
values of the electrical offset adjustment and power sup-
ply adjustment when the NV is reset.
• Setting method of NV reset
1. Select the manual mode of the test mode, and set item number
021 NV Reset (see page 13).
2. Press the
X
key.
3. Press the
X
key once more.
4. Press the
x
key to quit the manual mode, and return to the
test mode (display check mode).
Temperature Correction
• Adjustment method of temperature correction
1. Select the manual mode of test mode, and set the item number
015 (see page 13).
2. Measure the ambient temperature.
3. Adjust with
[VOL +]
,
[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 to write the adjusted value.
5. Press the
x
key to quit the manual mode, and return to the
test mode (display check mode).
Note : Power supply adjustment auto item feed mode (see page
24) is available to perform the temperature correction and
power supply adjustment without entering the manual mode.
Remote commander LCD display
ResNV CC
021
Remote commander LCD display
ResOK?
021
Remote commander LCD display
NV reset (after several seconds)
Res***
021
Reset!
021
Remote commander LCD display
**
: Adjusted value
SetTmp **
015
*1:
“5.Adjustment required before Overall Adjustment” is
needed only for 3CED, 4CED and UK models.
Ver 1.1 2003.05
