Sony MZ-B10 service manual WrPwHi 9E, HrefPw, WrPwLo, Laser Power Check

Laser Power Check

Note: If result of measurement of the laser power does not satisfy the specification, either replace the OP (optical pick-up unit) or check whether the laser circuit block is working correctly. When the result of laser power measurement does not satisfy the specification even though the laser circuit block is con- firmed to be working correctly, replace the OP (optical pick- up unit).

• Connection

laser

power meter

optical pick-up objective lens

• Checking method

1.Select the manual mode of test mode (see page 16), and set the laser power check mode (item number 010).

Set LCD display

Laser

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.

MZ-B10

Ver 1.1 2003.06

9.Check that the laser power meter reading is 4.95 ± 0.59 mW.

10.Press the > key, and set the laser MO (X4 speed) write check mode (item number 014). Modify the adjusted value to 9E with the [SPEED CONTROL +] or [SPEED CONTROL - -]key.

Set LCD display

WrPwHi 9E

014

9E: Initial value

11.Check that the laser power meter reading is 5.93 ± 0.71mW.

12.Press the x key to quit the manual mode, and activate the test mode (display check mode).

Overall Adjustment Mode

• Configuration of Overall Adjustment Mode

Overall adjustment mode			x key
(Title display)
"Assy**"
			Continuing overall adjustment
		key
	.			CD overall
		key		adjusting
	>			MO overall
				adjusting

4. Press the > key, and set the laser MO read check mode

(item number 011).

Set LCD display

LrefPw 16

011

Nkey or

u key

on the remote commander

[SPEED CONTROL +] key or [DISPLAY] key

on the remote commander

Automatic

Disc

discrimination

overall

adjustment

Electrical

offset

adjustment

16: Initial value

5.Check that the laser power meter reading is 0.800 ± 0.10 mW.

6.Press the > key, and set the laser CD read adjustment mode (item number 012). Modify the adjusted value to 18 with the

[SPEED CONTROL +] or [SPEED CONTROL --] key.

Set LCD display

HrefPw 18

012

18: Initial value

7.Check that the laser power meter reading is 0.910 ± 0.11 mW.

8.Press the > key, and set the laser MO (X2 speed) write check mode (item number 013). Modify the adjusted value to 85 with the [SPEED CONTROL +] or [SPEED CONTROL - -]key.

Set LCD display

WrPwLo 85

013

85: Initial value

[SPEED CONTROL -] key or [P MODE] key

on the remote commander

[GROUP] key or

key

on the remote commander

Temperature

correction

and

Power supply

adjustment

auto item feed

NV reset

(item number 21)

27