Sony MZ-N505 service manual 011 ###S, 012 ###S, 013 ###S, Laser Power Check

MZ-N505

LASER POWER CHECK

• Connection

laser power meter

Optical pick-up objective lens

digital voltmeter

MAIN board

TP (+)

TP (–)

• Checking Method

1.Select the manual mode of test mode (see page 14), and set the laser power adjusting mode (item number 010).

Set LCD display

010Laser

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).

Set LCD display

011###S**

###: Address

**: Adjusted value

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).

Set LCD display

012###S**

###: Address

**: Adjusted value

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).

Set LCD display

013###S**

###: Address

**: Adjusted value

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)

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