DAV-LF1, HCD-LF1 - Sony Audio Service Manual (repair manual). Page 4

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The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output several times.

Regarding the notification symbol “R”
Because the number of the operating buttons of this product
are limited, some operations require use of the operating
buttons of the remote commander (RM-SP320 supplied with
the product). When a specific operation requires use of the
operating buttons of the remote commander (RM-SP320), “R”
is added to the specific operating procedure in this manual.
Example  MENU/NO “R”  The  MENU/NO  button of remote
commander.

Incorrect operations may be performed if the test mode is not
entered properly.
In this case, press the  ?/1  button to turn the power off, and
retry to enter the test mode.

The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Procedure :

1. Press the  ?/1  button to turn the set on.
2. Press the  FUNCTION “R”  button or touch the  FUNCTION

button to set DVD function.

3. Insert a disc.
4. While the power is ON (excluding the mode of Power-ON

Animation mode), touch the  

x  

Sensor (on Touch Panel) and

press the  A  button simultaneously for several seconds.

5. The “Locked” display appears for a while and disc cannot be

removed any more even if the  A  button is pressed.

* To release this mode, repeat the above operation. The

“Unlocked” display appears and the Disc Tray Lock mode is
canceled.

When “LOCKED” is displayed, the slot lock is not released by
turning power on/off with the  ?/1  button.

When replacing the DMB07 board, since the adjustment value is
not set up correctly,  “Drive Auto Adjustment” can’t be performed.
In this case, initialize Memory in the following procedures.

1. Set the test mode. (See page 25)
2. Press the [2] key of the remote commander, and set the “DRIVE

MANUAL OPERATION”. (See page 27)

3. Press the [6] key of the remote commander, and set the “2-6,

Memory Check”. (See page 29)

4. Press the [CLEAR] key of the remote commander, and initialize

Memory.