Servicing Notes - Sony CF-CD73 Service Manual

ICF-CD73/CD73V
Ver. 1.3
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static 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 emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S701. (push switch type)
The following checking method for the laser diode is operable.
• Method
Emission of the laser diode is visually checked.
1. Open the lid.
2. Push the S551 as shown in Fig.1.
[CD ]
3. Press the button.
NX
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
Fig.1 Method to push the S551
4
SECTION 1

SERVICING NOTES

S551
DISCRIMINATION OF ORIGINAL AND LIV MODEL
There are two types of ICF-CD73V.
Refer to following.
WINDOW Front View
ORIGINAL MODEL
COLOR VARIATION
MODEL Destination
Canadian
ICF-CD73 Italian
UK
US (ORIGINAL)
ICF-CD73V
US (LIV)
NOTES ON EXCHANGING THE FLEXIBLE FLAT
CABLE (13 CORE)
When the flexible flat cable which has connected the LCD board
(CNP402) and CD board (CNP702) is exchanged, please attach to
a set according to the following after bending.
1 Turn the character side up and bend in the direction
(back side) of A from an end in the position of about 9 mm.
character side
± 9 mm
2 Bend in the direction of B from an end in the position
of about 70 mm.
back side
± 70 mm
character side
3 Attach in a set.
LCD board
(CNP402)
LIV MODEL
Window Color Cabinet Color
CLEAR BLUE WHITE
CLEAR YELLOW BEIGE
CLEAR BLUE WHITE
CLEAR BLUE WHITE
CLEAR YELLOW BEIGE
CD board
character side
(CNP702)