Sony LUMA LMD-1420 User manual

LCD MONITOR
LMD-1420
LMD-1410
SERVICE MANUAL
1st Edition

LMD-1420/1410
!WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so. Refer all servicing to
qualified service personnel.
!WARNUNG
Die Anleitung ist nur für qualifiziertes Fachpersonal bestimmt.
Alle Wartungsarbeiten dürfen nur von qualifiziertem Fachpersonal ausgeführt werden. Um die
Gefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei
Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen.Andere als die angegeben
Wartungsarbeiten dürfen nur von Personen ausgeführt werden, die eine spezielle Befähigung
dazu besitzen.
!AVERTISSEMENT
Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien.Afin
de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les
réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres.
Pour toute réparation faire appel à une personne compétente uniquement.

1
LMD-1420/1410
Table of Contents
1. Service Overview
1-1. Appearance Figure ......................................................................................1-1
1-2. Board Location............................................................................................1-1
1-3. Disassembly ................................................................................................1-2
1-3-1. Rear Cover .................................................................................1-2
1-3-2. Q Board ......................................................................................1-2
1-3-3. GA Board ...................................................................................1-3
1-3-4. Inverter Board/BA Board ...........................................................1-3
1-3-5. DC Fan/Speaker .........................................................................1-4
1-3-6. J Board .......................................................................................1-4
1-3-7. LCD Panel ..................................................................................1-5
1-3-8. H Board/X Board (X Board: LMD-1420 only)..........................1-6
1-4. Unleaded Solder ..........................................................................................1-6
1-5. Warning on Power Connection ...................................................................1-7
2. Electrical Alignment
2-1. Preparation ..................................................................................................2-1
2-1-1. Required Equipment...................................................................2-1
2-1-2. Warm-up Time ...........................................................................2-1
2-1-3. How to Enter Service Mode .......................................................2-1
2-1-4. Preparing the Power Supply and Signals ...................................2-1
2-2. White Balance Adjustment .........................................................................2-1
3. Troubleshooting
3-1. Backlight does not light ..............................................................................3-1
3-2. System does not start...................................................................................3-2
3-3. Operation of this unit is abnormal...............................................................3-2
3-4. Image is abnormal .......................................................................................3-3
3-5. TALLY lamp is not lit (LMD-1420 only)...................................................3-3
3-6. Output function is abnormal........................................................................3-4
3-7. Fan is abnormal ...........................................................................................3-4
4. Spare Parts
4-1. Notes on Repair Parts..................................................................................4-1
4-2. Exploded Views ..........................................................................................4-2
4-3. Electrical Parts List .....................................................................................4-4
4-4. Packing Materials & Supplied Accessories ................................................4-4

2LMD-1420/1410
5. Block Diagrams
Overall.........................................................................................................5-1
6. Frame Wiring Diagram
Frame Wiring ..............................................................................................6-1

1-1
LMD-1420/1410
Section 1
Service Overview
1-1. Appearance Figure
1-2. Board Location
H board
Inverter board
J board
BA board
S board
Q board
GA board
X board (LMD-1420 only)

1-2 LMD-1420/1410
1-3. Disassembly
1-3-1. Rear Cover
1-3-2. Q Board
.Remove the rear cover. (Refer to Section 1-3-1.)
1Four screws
(PWH4 x 14)
3Five screws
(PWH4 x 14)
2Stand
4Four hooks
5Three hooks 7Three
hooks
6Three hooks
Cushion
8Rear cover
3Three harnesses 2Harness cover
Cushion
!/ AC holder
!- AC inlet
5Harness 8Q board
9Two screws
(PSW3 x 12)
1Two screws
(PWH3 x 6)
6Two screws
(PWH3 x 6)
4Screw
(PSW4 x 8) 7Two screws
(PWH3 x 6)

1-3
LMD-1420/1410
1-3-3. GA Board
.Remove the rear cover. (Refer to Section 1-3-1.)
1-3-4. Inverter Board/BA Board
.Remove the rear cover. (Refer to Section 1-3-1.)
.Remove the Q board. (Refer to Section 1-3-2.)
Cushion
1Three harnesses
2Five screws
(PWH3 x 6)
3GA board
Cushion
8BA board
5Inverter board
7Five screws
(PWH3 x 6)
1Five screws
(PWH3 x 6)
4Four screws
(PWH3 x 6)
6Ten harnesses
3Five harnesses
2Frame

1-4 LMD-1420/1410
1-3-5. DC Fan/Speaker
.Remove the rear cover. (Refer to Section 1-3-1.)
.Remove the Q board. (Refer to Section 1-3-2.)
1-3-6. J Board
.Remove the rear cover. (Refer to Section 1-3-1.)
.Remove the Q board. (Refer to Section 1-3-2.)
Cushion
!; Speaker
!\ Two screws
(PTP2 x 6)
2Fan bracket
4DC fan
6Fan bracket
8DC fan
3Two screws
(P2 x 14)
![ Two screws
(B3 x 14)
5Screw
(PWH3 x 6)
1Screw
(PWH3 x 6)
7Two screws
(P2 x 14)
9Board holder
!/ S board
Label side
!= Fan bracket
!] DC fan
!- Two screws
(PWH3 x 6)
Cushion
2Harness
5Three hooks
6AC cover
4AC button
3J board
1Two screws
(PWH M3 x 8)

1-5
LMD-1420/1410
1-3-7. LCD Panel
.Remove the rear cover. (Refer to Section 1-3-1.)
.Remove the Q board. (Refer to Section 1-3-2.)
.Remove the GA board. (Refer to Section 1-3-3.)
.Remove the inverter board and BA board. (Refer to Section 1-3-4.)
.Remove the DC fan and speaker. (Refer to Section 1-3-5.)
.Remove the J board. (Refer to Section 1-3-6.)
Cushion
1Screw
(PWH3 x 6)
2Cable retainer
5Main frame
4Four screws
(PWH M3 x 8)
3Four screws
(PWH M3 x 8)
6Two screws
(PWH3 x 6)
7Two screws
(PWH3 x 6)
8LCD panel
!- Protection plate
!/ Two cushions
9Two cushions

1-6 LMD-1420/1410
1-3-8. H Board/X Board (X Board: LMD-1420 only)
.Remove the rear cover. (Refer to Section 1-3-1.)
.Remove the Q board. (Refer to Section 1-3-2.)
.Remove the GA board. (Refer to Section 1-3-3.)
.Remove the inverter board and BA board. (Refer to Section 1-3-4.)
.Remove the DC fan and speaker. (Refer to Section 1-3-5.)
.Remove the J board. (Refer to Section 1-3-6.)
.Remove the LCD panel. (Refer to Section 1-3-7.)
Cushion
5Two screws
(PWH M3 x 8)
2Six screws
(PWH M3 x 8)
4Harness 3H board
1Harness
6X baord
(LMD-1420 only)
7ESD plate
1-4. Unleaded Solder
Boards requiring use of unleaded solder are printed with a lead 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
m
.Be sure to use the unleaded solder for the printed circuit board printed with the lead free mark.
.The unleaded solder melts at a temperature about 40 dChigher than the ordinary solder, therefore, it is
recommended to use the soldering iron having a temperature regulator.
.The ordinary soldering iron can be used but the iron tip has to be applied to the solder joint for a
slightly longer time. The printed pattern (copper foil) may peel away if the heated tip is applied for too
long, so be careful.