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MZ-N505
011 ###S**
Set LCD display
###
: Address
**
: Adjusted value
012 ###S**
Set LCD display
###
: Address
**
: Adjusted value
013 ###S**
Set LCD display
###
: Address
**
: Adjusted value
LASER POWER CHECK
• Connection
• Checking Method
1. Select the manual mode of test mode (see page 14), and set
the laser power adjusting mode (item number 010).
2. Press the . key continuously until the optical pick-up
moves to the most inward track.
3. Open the cover and set the laser power meter on the objective
lens of the optical pick-up.
4. Press the N key, and set the laser MO read adjustment mode
(item number 011).
5. Check that the laser power meter reading is 0.81 ± 0.08 mW.
6. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 44 mV.
7. Press the
N key, and set the laser CD read adjustment mode
(item number 012).
8. Check that the laser power meter reading is 0.97 ± 0.10 mW.
9. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 44 mV.
10. Press the N key, and set the laser MO write adjustment mode
(item number 013).
11. Check that the laser power meter reading is 4.95 ± 0.50 mW.
12. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 80 mV.
13. Press the x key to quit the manual mode, and activate the
test mode (display check mode).
Checking and Connection Location: MAIN board (See page 25)
digital voltmeter
MAIN board
laser
power meter
Optical pick-up
objective lens
TP (+)
TP (–)
010 Laser
Set LCD display