Sony R501PC service manual 64V1 PWM, 14 S14, 10Laser, 00ADJ OK, 14SetTmp, 11###S

2.Connect a digital voltmeter to the TP902 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.75 ± 0.01 V.

digital

voltmeter

MAIN board

TP902(VC)

TP910(GND)

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

(The item number changes to 764 when X key is pressed)

Adjustment and Connection Location: MAIN board (see page 20)

•Adjustment method of Vl PWM Duty (item number: 764)

This set LCD display

7 64V1 PWM

1.Press the [ENTER] key and change the LCD display.

This set LCD display

7 64 AD

: Adjusted value

2.Connect a digital voltmeter to the TP901 (VL) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.30 ± 0.01 V.

digital

voltmeter

MAIN board

TP901(VL)

TP910(GND)

3.When press the X key to write the adjusted value, LCD dis- plays as follows and power supply manual adjustment has com- pleted.

This set LCD display

MZ-R501/R501PC

3.Adjust with [VOL +], [VOL --]key so that the adjusted value

(hexadecimal value) becomes the ambient temperature. (Initial value: 14h = 20 ° C, Adjusting range: 80h to 7fh (–128 ° C to +127 ° C)

This set LCD display

014S14

:Address

14: Adjusted value

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

5-7. 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 12), and set the laser power adjusting mode (item number 010).

This 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).

This set LCD display

0 00ADJ OK

Adjustment and Connection Location: MAIN board

5-6. Temperature Correction

• Adjustment Method of temperature correction

1.Select the manual mode of test mode, and set the mode num- ber 014 (see page 12).

This set LCD display

014SetTmp

2.Measure the ambient temperature.

011LrefPw

5.Press the [ENTER] key and set the address & adjusted value display (See page 13).

This set LCD display

011###S

###: Address

: Adjusted value

6.Check that the laser power meter reading is 0.81 ± 0.08 mW.

7.Check that the voltage both ends (TP (+) and TP (–)) of resis- tor R501 at this time is below 44 mV.

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