Sony CX-LDB30 / CX-LDB50 / XR-DB30 / XR-DB50 Service Manual ▷ View online
4
CX-LDB30/LDB50
SECTION 1
SERVICING NOTES
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.
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.
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
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 °C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
other than those specified herein may result in hazardous radiation
exposure.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
exceeding the limit for Class 1.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on the
exterior.
The CLASS 1 LASER PRODUCT MARKING is located on the
exterior.
5
CX-LDB30/LDB50
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
Main unit
AUDIO IN w; (17, 23, 27)
AUDIO IN jack qs (19, 23)
BASS control 7 (17)
CD SYNC qk (16)
Disc slot 9
DISPLAY 3 (15, 21, 22)
Display window 4
FOLDER +/– qg (10, 11, 16)
i-Bass 5 (17)
AUDIO IN jack qs (19, 23)
BASS control 7 (17)
CD SYNC qk (16)
Disc slot 9
DISPLAY 3 (15, 21, 22)
Display window 4
FOLDER +/– qg (10, 11, 16)
i-Bass 5 (17)
PHONES jack qd
PLAY MODE ql (10, 11, 16, 26)
Remote sensor 2
TREBLE control 6 (17)
TUNER/BAND w; (12, 14, 17)
TUNING +/– qf (12, 14)
TUNING MODE ql (12, 14)
VOLUME control q; (18, 25)
PLAY MODE ql (10, 11, 16, 26)
Remote sensor 2
TREBLE control 6 (17)
TUNER/BAND w; (12, 14, 17)
TUNING +/– qf (12, 14)
TUNING MODE ql (12, 14)
VOLUME control q; (18, 25)
?/1 (power) 1 (7, 14, 27)
Z CD (eject) 8 (8, 9)
Z PUSH qa (16)
./> (go back/go forward)
Z CD (eject) 8 (8, 9)
Z PUSH qa (16)
./> (go back/go forward)
qf (10)
m/M (rewind/fast forward)
qf (8, 10, 14, 16)
x (stop) qh (10, 13, 16)
z REC PAUSE/START qj (16)
TAPE/N (play) w; (16)
CD/NX (play pause) w; (10)
z REC PAUSE/START qj (16)
TAPE/N (play) w; (16)
CD/NX (play pause) w; (10)
List of button locations and reference pages
How to use this page
Use this page to find the location of buttons and other
parts of the system that are mentioned in the text.
parts of the system that are mentioned in the text.
Illustration number
r
DISPLAY
ws (15, 21)
R
R
Name of button/part
Reference page
ALPHABETICAL ORDER
A – O
P – Z
BUTTON DESCRIPTIONS
H
HS
s
j
J
1
w;
ql
23
45 6 7 8
9
q;
qa
qs
qkqjqhqg qf
qd
6
CX-LDB30/LDB50
Remote control
CD qh (9, 11, 13, 16, 17)
CLEAR qd (12)
CLOCK/TIMER SELECT 2
CLEAR qd (12)
CLOCK/TIMER SELECT 2
(19, 20, 25)
CLOCK/TIMER SET 3 (8, 18,
19)
DISPLAY ql (15, 21, 22)
ENTER 9 (8, 11, 13, 18, 19)
EQ qs (17)
FM MODE 4 (15, 27)
FOLDER +/– qa (10, 11, 16)
FUNCTION 6 (8, 9, 11, 12, 14,
ENTER 9 (8, 11, 13, 18, 19)
EQ qs (17)
FM MODE 4 (15, 27)
FOLDER +/– qa (10, 11, 16)
FUNCTION 6 (8, 9, 11, 12, 14,
16, 17, 23, 27)
PLAY MODE qk (10, 11, 16, 26,
28)
REPEAT 4 (11)
SLEEP w; (18)
TAPE qg (16, 17)
TUNER/BAND 5 (12, 14, 17)
TUNER MEMORY qj (13)
TUNING MODE qk (12, 14)
VOLUME +/– q; (18, 25)
SLEEP w; (18)
TAPE qg (16, 17)
TUNER/BAND 5 (12, 14, 17)
TUNER MEMORY qj (13)
TUNING MODE qk (12, 14)
VOLUME +/– q; (18, 25)
?/1 (power) 1 (7, 14, 19)
m/M (rewind/fast forward)
m/M (rewind/fast forward)
7 (10, 14, 16)
X (pause) 8 (10, 16)
x (stop) 8 (10, 16)
N (play) 8 (10, 16)
–/+(tuning) qf (12, 17)
./> (go back/go forward)
x (stop) 8 (10, 16)
N (play) 8 (10, 16)
–/+(tuning) qf (12, 17)
./> (go back/go forward)
qf (8, 10, 18)
ALPHABETICAL ORDER
A – O
P – Z
BUTTON DESCRIPTIONS
4
5
6
7
8
9
0
3
2
1
qa
qd
qs
ql
qk
qj
qh
qg
qf
w;
Use buttons on the remote for the operation.
1
Press
?/1
to turn on the system.
2
Press CLOCK/TIMER SET.
3
Press
.
or
>
repeatedly to set the
hour.
4
Press ENTER.
5
Press
.
or
>
repeatedly to set the
minute.
6
Press ENTER.
The clock starts working.
To adjust the clock
1
Press CLOCK/TIMER SET.
2
Press
.
or
>
until "CLOCK SET?"
appears, then press ENTER.
3
Do the same procedures as step 3 to 6
above.
above.
Notes
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
You cannot set the clock in Power Saving Mode
(page 21).
Setting the clock
7
CX-LDB30/LDB50
SECTION 3
DISASSEMBLY
3-1. DISASSEMBLY FLOW
3-3.
CD MECHANISM SECTION
(Page 8)
3-10.
CD MECHANISM DECK
(CDM80BV-F4BD81)
(Page 12)
3-7.
PANEL BOARD, CD EJECT BOARD,
JACK BOARD
(Page 10)
3-4.
FRONT PANEL SECTION
(Page 9)
3-8.
CASSETTE DECK MECHANISM
(Page 11)
3-6.
MAIN BOARD
(Page 10)
3-5.
POWER TRANSFORMER
(Page 9)
3-9.
CASSETTE PANEL
(Page 11)
3-2.
SIDE PANEL (L) (R), TOP PANEL,
BACK PANEL
(Page 8)
SET
3-11.CHASSIS (TOP)
(Page 12)
3-14.DRIVER BOARD
(Page 14)
3-17.BASE UNIT
(BU-F4BD81B)
(Page 16)
3-13.DISC STOP LEVER,
DISC SENSOR LEVER
(Page 14)
3-15.BD BOARD
(Page 15)
3-16.OPTICAL PICK-UP
(KSM-215CFP/C2NP)
(Page 15)
3-18.LEVER (BU LOCK)
(Page 16)
3-19.CLOSE LEVER
(Page 17)
3-20. DIR LEVER,
GEAR (IDL-B)
(Page 17)
3-21. GEAR (IDL-C)
(Page 18)
3-12.LEVER (LOADING R/L)
(Page 13)
• This set can be disassembled in the order shown below.