Sony MZ-N1 RECpwL, RECpwH, Vd Pwm, SetTmp, 010Laser, LrefPw, HrefPw, Temperature Correction

digital voltmeter

•Adjustment method of Vrec PWM Duty (L) (item number: 766)

Remote commander LCD display

766 RECpwL **

**: Adjusted value

1.Connect a digital voltmeter to the AP611 (VREC) on the MAIN board, and adjust [VOLUME +] key (voltage up) or [VOLUME

+ 0.025

--]key (voltage down) so that the voltage becomes 1.08 – 0.005 V.

digital voltmeter

MAIN board

AP611 (VREC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

•Adjustment method of Vrec PWM Duty (H) (item number: 767)

Remote commander LCD display

767 RECpwH **

**: Adjusted value

1.Connect a digital voltmeter to the AP611 (VREC) on the MAIN board, and adjust [VOLUME +] key (voltage up) or [VOLUME --]key (voltage down) so that the voltage becomes 1.65 to 1.70 V.

digital voltmeter

MAIN board

AP611 (VREC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

•Adjustment method of Vd PWM Duty (item number: 768)

Remote commander LCD display

768 VD_PWM **

**: Adjusted value

1.Connect a digital voltmeter to the AP911 (VD) on the MAIN

board, and adjust [VOLUME +] key (voltage up) or [VOLUME --]key (voltage down) so that the voltage becomes 1.31 ± 0.010

V.

MAIN board

AP911 (VD)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 24)

MZ-N1

Temperature Correction

• Adjustment method of temperature correction

1.Select the manual mode of test mode, and set the item number 015 (see page 14).

Remote commander LCD display

015 SetTmp **

**: Adjusted value

2.Measure the ambient temperature.

3.Adjust with [VOLUME +], [VOLUME --]key so that the ad- justed value (hexadecimal value) becomes the ambient tem-

perature.

(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.

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).

Remote commander 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).

Remote commander LCD display

011 LrefPw **

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).

Remote commander LCD display

012 HrefPw **

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.

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