Sony TRIMASTER EL PVM-A250 User manual

PROFESSIONAL VIDEO MONITOR
PVM-A250
SERVICE MANUAL
1st Edition (Revised 1)

PVM-A250
!警告
このマニュアルは，サービス専用です。
お客様が，このマニュアルに記載された設置や保守，点検，修理などを行うと感電や火災，
人身事故につながることがあります。
危険をさけるため，サービストレーニングを受けた技術者のみご使用ください。
!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.

PVM-A250 1 (P)
安全のために，周辺機器を接続する際は，過大電圧を持
つ可能性があるコネクターを以下のポートに接続しない
でください。
: SERIAL REMOTE コネクター
: PARALLEL REMOTE コネクター
上記のポートについては本書の指示に従ってください。
For safety, do not connect the connector for periph-
eral device wiring that might have excessive volt-
age to the following ports.
: SERIAL REMOTE connector
: PARALLEL REMOTE connector
Follow the instructions for the above ports.
警告
万一，異常が起きた際に，お客様が電源を切ることがで
きるように，設置の際には，機器近くの固定配線内に専
用遮断装置を設けるか，機器使用中に，容易に抜き差し
できるコンセントに電源プラグを接続してください。
WARNING
When installing the unit, incorporate a readily accessible
disconnect device in the fixed wiring, or connect the
power cord to a socket-outlet which must be provided
near the unit and easily accessible, so that the user can
turn off the power in case a fault should occur.
WARNUNG
Beim Einbau des Geräts ist daher im Festkabel ein
leicht zugänglicher Unterbrecher einzufügen, oder
das Netzkabel mußmit einer in der Nähe des Geräts
befindlichen, leicht zugänglichen Wandsteckdose
verbunden werden, damit sich bei einer Funktionsstörung
die Stromversorgung zum Gerät jederzeit unterbrechen
läßt.
When installing the installation space must be secured
in consideration of the ventilation and service operation.
.Do not block the ventilation slots at the rear panel, and
vents of the fans.
.Leave a space around the unit for ventilation.
.Leave more than 40 cm of space in the rear of the unit
to secure the operation area.
When the unit is installed on the desk or the like, leave
at least 1U (4.4 cm) or more of space above and below
the unit.
Leaving 40 cm or more of space above the unit is
recommended for service operation.
設置時には，通気やサービス性を考慮して設置スペー
スを確保してください。
.ファンの排気部や通気孔（後面）をふさがない。
.通気のために，セット周辺に空間をあける。
.作業エリアを確保するため，セット後方は，40cm 以
上の空間をあける。
机上などの平面に設置する場合は，上下に 1U（4.4cm）
以上の空間をそれぞれ確保してください。ただし，セッ
ト上部はサービス性を考慮し 40cm 以上の空間を確保
することを推奨します。

1 (E)
PVM-A250
Table of Contents
3. Troubleshooting
3-1. LED (Power Switch) on the Front Panel
Blinks in Red.............................................................3-1 (E)
3-1-1. Preparation.......................................................3-1 (E)
3-1-2. Setting of PC....................................................3-1 (E)
3-1-3. Connection with Monitor.................................3-2 (E)
3-1-4. Reading the Register........................................3-3 (E)
3-1-5. Check Method and Remedy............................. 3-4 (E)
3-2. LED on a QBC Board Lights .................................... 3-5 (E)
3-3. LED on a G2 Board Lights .......................................3-6 (E)
3-4. System Does Not Start ..............................................3-8 (E)
3-5. Abnormality Is Found in Control Operation.............3-9 (E)
4. Spare Parts
4-1. Notes on Repair Parts...................................................... 4-1
4-2. Exploded Views............................................................... 4-2
4-3. Packing Materials & Supplied Accessories................... 4-10
5. Block Diagrams
Overall............................................................................. 5-1
Manual Structure
Purpose of this manual............................................................ 2 (E)
Related manuals...................................................................... 2 (E)
Trademarks.............................................................................. 2 (E)
1. Service Overview
1-1. Appearance Figure ....................................................1-1 (E)
1-2. Board Location..........................................................1-1 (E)
1-3. Tighten Torque ..........................................................1-2 (E)
1-4. Disassembly ..............................................................1-3 (E)
1-4-1. Rear Cover ....................................................... 1-3 (E)
1-4-2. PWM Fan (Left)...............................................1-5 (E)
1-4-3. G2 Board..........................................................1-6 (E)
1-4-4. PWM Fan (Right) ............................................1-7 (E)
1-4-5. Bezel Assembly................................................1-8 (E)
1-4-6. H1 Board..........................................................1-9 (E)
1-4-7. Speaker...........................................................1-10 (E)
1-4-8. H2 Board........................................................ 1-11 (E)
1-4-9. OLED Module Assembly...............................1-12 (E)
1-5. Periodic Replacement Parts and Cleaning ..............1-13 (E)
1-5-1. Periodic Replacement Parts ........................... 1-13 (E)
1-5-2. Cleaning.........................................................1-13 (E)
1-6. Lead-free Solder......................................................1-13 (E)
2. Circuit Description
2-1. Board Configuration.................................................. 2-1 (E)
2-2. G2 Board ................................................................... 2-1 (E)
2-3. H1 Board ................................................................... 2-1 (E)
2-4. H2 Board ................................................................... 2-1 (E)
2-5. QBC Board................................................................2-2 (E)

2 (E) PVM-A250
Manual Structure
Purpose of this manual
This manual is the Service Manual of the Professional Video Monitor PVM-A250.
This manual describes the information on the premise of providing the block level
service (such as service overview, circuit description, troubleshooting, spare parts
and block diagrams).
Related manuals
The following manual is provided for this unit in addition to this “Service Manual”.
.“Operating Instructions” (supplied with this unit)
This manual is necessary for application and operation of this unit.
.“Factory Service Manual” (available on request)
This manual describes the information required for the part level service such as
electrical parts list, schematic diagrams, and board layouts.
Trademarks
Trademarks and registered trademarks used in this manual are as follows.
.Windows, Windows Vista, and Internet Explorer are the registered trademarks of
Microsoft Corporation in the United States and Other countries.
Other system names, product names, and company names appearing in this manual
are trademarks or registered trademarks of their respective holders.

1-1 (E)
PVM-A250
1-1. Appearance Figure
1-2. Board Location
Section 1
Service Overview
H1 board
H2 board
G2 board
QBC board

1-2 (E) PVM-A250
1-3. Tighten Torque
Tighten the each screw of this unit with the torque below.
n
.The screw (PSW4 x8) of this unit has two type of the tighten torque. Be careful not to confuse.
.When using the torque driver with the notation of cN.m, interpret it as follows.
Example: 0.8 N.m = 80 cN.m
.B3 x5: 0.40 ?0.10 N.m (4.07 ?1.01 kgf.cm)
.BVTP3 x8: 0.60 ?0.10 N.m (6.11 ?1.01 kgf.cm)
.BVTP3 x10: 0.60 ?0.10 N.m (6.11 ?1.01 kgf.cm)
.PSW3 x6: 0.60 ?0.10 N.m (6.11 ?1.01 kgf.cm)
.PSW3 x12: 0.80 ?0.10 N.m (8.15 ?1.01 kgf.cm)
.PSW4 x8 (stand block and AC IN bracket): 1.20 ?0.10 N.m (12.23 ?1.01 kgf.cm)
.PSW4 x8 (main frame block and rear cover block): 1.50 ?0.10 N.m (15.29 ?1.01 kgf.cm)
.PSW4 x16: 1.50 ?0.10 N.m (15.29 ?1.01 kgf.cm)
.3 x4: 0.40 ?0.10 N.m (4.07 ?1.01 kgf.cm)
.NUT (M6 x0.5): 0.40 ?0.10 N.m (4.07 ?1.01 kgf.cm)

1-3 (E)
PVM-A250
1-4. Disassembly
n
.In this section, remove parts in the order of numbers shown in the figure.
.When removing/installing the cabinet and replacing the board, place the unit on the conductive cushion.
.QBC board is not prepared for spare parts. When the QBC board is broken, replace the OLED module
assembly.
1-4-1. Rear Cover
2Handle
1Two screws
(PSW4 x16)
Conductive cushion
Upper side
4Screw
(PSW4 x8)
6Screw
(PSW4 x8)
8Eleven screws
(PSW4 x8)
3Clamper
5Stand block
7Stand block

1-4 (E) PVM-A250
0Three hooks
9Raise the rear cover in the direction of the arrow A.
!- Remove the rear cover while
holding these portions.
A
Conductive cushion
Conductive cushion
Upper side
Upper side

1-5 (E)
PVM-A250
1-4-2. PWM Fan (Left)
.Remove the rear cover. (Refer to Section 1-4-1.)
7Two screws
(BVTP3 x8) 5Two screws
(PSW3 x6)
1Three nylon rivets
2Conductive tape (TOP)
Conductive cushion
CN7402
Upper side
Label
4Harness
6Fan bracket
8PWM fan (left)
3Clamper
QBC board
Serial No.7000001 to 7001869: PVM-A250 (SY)
Serial No.7200001 to 7200148: PVM-A250 (CN)

1-6 (E) PVM-A250
1-4-3. G2 Board
.Remove the rear cover. (Refer to Section 1-4-1.)
3Four screws
(PSW3 x6)
Conductive cushion
CN6001
CN6400
CN6401
Upper side
1Two harnesses
2Harness
4G2 board
5Insulation sheet

1-7 (E)
PVM-A250
1-4-4. PWM Fan (Right)
.Remove the rear cover. (Refer to Section 1-4-1.)
.Remove the G2 board. (Refer to Section 1-4-3.)
Conductive cushion
3Two screws
(PSW3 x6)
CN7403
Upper side
Label
2Harness
1Clamper
5Two screws
(BVTP3 x8)
4Fan bracket
6PWM fan (right)

1-8 (E) PVM-A250
1-4-5. Bezel Assembly
.Remove the rear cover. (Refer to Section 1-4-1.)
7Nine screws
(BVTP3 x10)
Conductive cushion
CN004
CN4006
CN7000
Conductive cushion
1Clamper
8Main frame
assembly
9Remove the H1 board. (Refer to Section 1-4-6.)
0Remove the speaker. (Refer to Section 1-4-7.)
!- Remove the H2 board. (Refer to Section 1-4-8.)
!= Bezel assembly
H2 board
6Harness
2Wire saddle
5Two harnesses
Upper side
Upper side
3Two nylon rivets
4Conductive tape
(BTM)
Serial No.7000001 to 7001869: PVM-A250 (SY)
Serial No.7200001 to 7200148: PVM-A250 (CN)

1-9 (E)
PVM-A250
1-4-6. H1 Board
.Remove the rear cover. (Refer to Section 1-4-1.)
3Two harnesses
CN3
CN1
4Four screws
(BVTP3 x10)
1Screw
(PSW4 x8)
6Two hooks
0Standby button
2Stand bracket
5H1 board
!- Encoder knob
8Six hooks
7Control keypad assembly
9Input keypad
assembly
Conductive cushion
Upper side

1-10 (E) PVM-A250
1-4-7. Speaker
.Remove the rear cover. (Refer to Section 1-4-1.)
8Speaker holder
5Harness
1Two clampers
6Conductive tape (SPEAKER)
9Miniature speaker
7Two screws
(BVTP3 x10)
Conductive cushion
CN7000
Upper side
3Two nylon rivets
4Conductive tape
(BTM)
2Wire saddle
3Remove the tape.
Do not use the removed tape.
Replace it with the new tape.
Ferrite clamp
Tape Clamper
Serial No.7000001 to 7001869: PVM-A250 (SY)
Serial No.7200001 to 7200148: PVM-A250 (CN)

1-11 (E)
PVM-A250
1-4-8. H2 Board
.Remove the rear cover. (Refer to Section 1-4-1.)
CN004
CN003
1USB cover
5Two screws
(BVTP3 x10)
7Screw
(3 x4)
8Nut
9H2 board
6H2 bracket
Conductive cushion
Upper side
2Screw
(PSW4 x8)
3Stand bracket
4Two harnesses

1-12 (E) PVM-A250
1-4-9. OLED Module Assembly
.Remove the rear cover. (Refer to Section 1-4-1.)
.Remove the PWM fan (left). (Refer to Section 1-4-2.)
.Remove the G2 board. (Refer to Section 1-4-3.)
.Remove the PWM fan (right). (Refer to Section 1-4-4.)
.Remove the bezel assembly. (Refer to Section 1-4-5.)
3Ten screws
(PSW4 x8)
4Four screws
(PSW3 x6)
5Four screws
(PSW3 x6)
0Two screws
(PSW3 x6)
2Three screws
(B3 x5)
1Two harnesses
!- EMC bracket
9Two gaskets
!= OLED module assembly
8Main frame assembly
6Five conductive
tapes
7Five conductive
tapes
Conductive cushion
CN4007
CN4008
Upper side
*1
*1
*1: Serial No.7000001 to 7001869: PVM-A250 (SY)
Serial No.7200001 to 7200148: PVM-A250 (CN)

1-13 (E)
PVM-A250
1-5. Periodic Replacement Parts and Cleaning
1-5-1. Periodic Replacement Parts
n
This table does not describe the guarantee period of each part.
The replacement period of each part is changed according to the environment and conditions of use.
(The following is the value when the environmental temperature of this unit is set to 25 dC.)
Part name Part No. Number of Replacement period (h)
pieces (Operating time: 24 hours/day) (Operating time: 16 hours/day)
OLED module assembly A-1998-084-A 1 15000 25000
G2 board A-1989-804-A 1 25000 50000
PWM fan !1-855-015-11 2 20000 40000
1-5-2. Cleaning
Clean periodically the dust on the OLED module assembly and fans.
It is recommended to perform the cleaning once a year in the case of the operating time of 24 hours/day
and every two years in the case of the operating time of 16 hours/day.
1-6. Lead-free Solder
All boards mounted in this unit use lead-free solder. Be sure to use lead-free solder when repairing the
boards of this unit. A lead free mark (LF) indicating that the solder contains no lead is printed on each
board.
(Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular
size.)
: LEAD FREE MARK
n
.The lead-free solder melts at a temperature about 40 dC higher 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.