Sony HCD-BC150 - Dvd Home Theater System, Service Manual

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3
HCD-BC150/BC250
SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
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.
NOTES ON LASER DIODE EMISSION CHECK
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output several times.
DISC SLOT LOCK
The disc slot lock function for the antitheft of an demonstration
disc in the store is equipped.
Setting Procedure :
1. Press the
?/1
button to turn the set on.
2. Press the
[FUNCTION]
button to set DVD function.
3. Insert a disc.
4. Press the
x
stick and the
Z
(DISC1) button simultaneously
for five seconds.
5. The message “LOCKED” is displayed and the slot is locked.
Releasing Procedure :
1. Press the
x
stick and the
Z
(DISC1) button simultaneously
for five seconds again.
2. The message “UNLOCKED” is displayed and the slot is
unlocked.
Note: When “LOCKED” is displayed, the slot lock is not released by
turning power on/off with the
?/1
button.
Note 1: 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-SS250 supplied with
the product). When a specific operation requires use of the
operating buttons of the remote commander (RM-SS250), “R”
is added to the specific operating procedure in this manual.
Example MENU/NO “R” The MENU/NO button of remote
commander.
Note 2: Incorrect operations may be performed if the test mode ia not
entered properly.
In this case, press the
?/1 button to turn the power off, and
retry to enter the test mode.
Note 3: If the disc tray does not open and the message “LOCKED”
appears, press the
x
tick and the
Z
(DISC1) button
simultaneously for 5 seconds or longer.
Then remove your fingers from the above stick and the button.
The message “UNLOCKED” appears for 2 seconds and the disc
tray opens.
• SERVICE POSITION-1 (DVD MECHANISM DECK)
1mm/21P/L300 (J-2501-244-A)
DVD mechanism deck
(CDM81C-DVBU100)
1mm/28P/L300 (J-2501-249-A)