Sony BKM-301HD User manual

...............
SERVICE MANUAL
MODEL DEST
BKM-301HD US/CND
R
HD SDI INPUT ADAPTOR
POWER BLOCK B BLOCK GC BOARD
............

!WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injuly, 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.
WARNING!!
AN ISOLATION TRANSFORMER SHOULD BE USED DURING
ANYSERVICETOAVOIDPOSSIBLESHOCKHAZARD,BECAUSE
OF LIVE CHASSIS.
THE CHASSIS OF THIS RECEIVER IS DIRECTLY CONNECTED
TO THE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTSIDENTIFIEDBYSHADINGANDMARK!ONTHE
SCHEMATICDIAGRAMS,EXPLODEDVIEWSANDINTHEPARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION!!
AFIND’EVITERTOUTRISQUED’ELECTROCUTIONPROVENANT
D’UN CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR
D’ISOLEMENTDOITETREUTILISÉLORSDETOUTDÉPANNAGE.
LE CHÁSSIS DE CE RÉCEPTEUR EST DIRECTEMENT
RACCORDÉ Á L’ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS ÁLA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET PAR UNE
MAPQUE ! SUR LES SCHÉMAS DE PRINCIPE, LES VUES
EXPLOSÉES ET LES LISTES DE PIECES CONT D’UNE
IMPORTANCE CRITIQUE POUR LA SÉCURITÉ DU
FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTSSONYDONTLENUMÉRODEPIÉCEESTINDIQUÉ
DANS LE PRÉSENT MANUEL OU DANS DES SUPPLÉMENTS
PUBLIÉS PAR SONY.

1 (P)
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
1. Checktheareaofyourrepair forunsolderedorpoorly-soldered
connections.Check the entireboard surface forsolder splashes
and bridges.
2. Checktheinterboardwiringtoensurethatnowiresare“pinched”
or contact high-wattage resistors.
3. Checkthatallcontrolknobs,shields,covers,groundstraps,and
mounting hardware have been replaced. Be absolutely certain
that you have replaced all the insulators.
4. Lookforunauthorizedreplacementparts,particularlytransistors,
thatwereinstalledduringapreviousrepairPointthemouttothe
customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs
ofdeterioration.Pointthemouttothecustomerandrecommend
their replacement.
6. Check the line cord for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.

1
TABLE OF CONTENTS
1. OPERATING INSTRUCTIONS ....................................................... 1-1
2. CIRCUIT ADJUSTMENTS
2-1. Preparations.................................................................................................. 2-1
2-2. B Board Adjustments ................................................................................... 2-2
3. CIRCUIT DESCRIPTIONS ............................................................... 3-1
4. SEMICONDUCTORS ........................................................................... 4-1
5. EXPLODED VIEWS
5-1. Main Unit ..................................................................................................... 5-2
6. ELECTRICAL PARTS LIST.............................................................. 6-1
7. BLOCK DIAGRAMS
7-1. B Block Diagram.......................................................................................... 7-1
7-2. GC Block Diagram....................................................................................... 7-2
8. DIAGRAMS
8-1. Printed Wiring Boards/Schematic Diagrams ............................................... 8-1
B ..................................................................................................... 8-2
GC ..................................................................................................... 8-6

1-1
SECTION 1
OPERATING INSTRUCTIONS This section is extracted from
operation manual.
1
1997 by Sony Corporation
BKM-301HD
EN
3-861-132-03 (1)
For installation, contact your Sony dealer.
Operating Instructions
Page 10
PHM-20M8U/14M8U
Monitors Available
HD SDI
Input Adaptor

1-2
10
For the customers in the USA
This equipment has been tested and found
to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide
reasonable protection against harmful
interference when the equipment is
operated in a commercial environment.
This equipment generates, uses, and can
radiate radio frequency energy and, if not
installed and used in accordance with the
instruction manual, may cause harmful
interference to radio communications.
Operation of this equipment in a residential
area is likely to cause harmful interference
in which case the user will be required to
correct the interference at his own expense.
You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate
this equipment.
English
Table of Contents
11
Table of Contents
Overview...........................................................................12
Precautions ......................................................................12
Connections .....................................................................13
Operation..........................................................................14
Specifications ..................................................................15
EN
Englsih

1-3
12
Overview
The HD SDI Input Adaptor BKM-301HD is an optional board
that provides the HD SDI signal input
1)
(one line) for Sony HD
Trinitron Color Monitors, the PHM-20M8U and the PHM-
14M8U.
Precautions
On magnetism
Do not place the monitor near any devices that emit magnetism
(magnets, speakers, electric clocks, toys using magnets, health
instruments, etc.). Magnetism will cause picture bounce,
oscillations or picture discoloration.
Operating and storage locations
Avoid operating or storing the monitor under the following
conditions:
• Extremely hot or cold places
• Humid or dusty places
• Locations exposed to rain
• Locations subject to storing vibration
• Near a TV or radio station that radiates high-powered radio
frequencies
Others
• Do not apply excessive force to the board.
• Wear an anti-static wristband when touching the board.
If the board is malfunctioning or causing errors, consult your
nearest Sony dealer.
.....................................................................................................................................................................
1) The MONITOR OUTPUT signals do not satisfy the ON-LINE signal specifications.
13
Connections
HDW-500, etc.
Monitor
C (HD SDI) IN
HD SDI OUTPUT
Connect the monitor and the digital VTR as follows.

1-4
14
Operation
Follow the instructions below.
1Press the POWER switch on the monitor.
The power indicator (green) is turned on.
2Press the INPUT C button to switch the input.
The indicator (orange) is turned on and the HD SDI signal
is input.
INPUT
C
POWER
21
15
Specifications
Input/Output
HD SDI IN: BNC×1
Serial digital (1.485 Gbps)
Conform to SMPTE 292M, BTA-S004A
MONITOR OUT: BNC×1
*The MONITOR OUT signals do not
satisfy the ON-LINE signal
specifications.
Quantization: 10 bits/sampling
Frequency response:
Y: 24 MHz ± 3dB
P B /P R : 12 MHz ± 3dB
Design and specifications are subject to change without notice.

1-5
1997 by Sony Corporation
BKM-301HD
EN
3-861-133-02 (1)
BKM-301HD
HD SDI
Input Adaptor
This manual is intended for dealers.
Leave installation of the BKM-301HD to your authorized Sony dealer. The
monitor has many components inside that have extremely high voltage.
Touching these may lead to injury. Do not install this input adaptor by
yourself.
Authorized dealers must read this manual carefully before installing the
input adaptor.
Installation Manual for Dealers
Page 13
ning!War
PHM-20M8U/14M8U
Monitors Available

1-6
13
English
Table of Contents
Components.....................................................................14
Installing the Input Adaptor ............................................15
Before Installing the Input Adaptor ............................... 15
Installing the Power Block.............................................16
Installing the GC board.................................................. 17
Installing the B block .....................................................18
After Installing the Input Adaptor.................................. 20
Rewriting the Service Mode Status................................21
EN
Englsih

1-7
14
Components
Power block GC board
BNC connector (2)
B block
8-pin connector cable
Power block screw (3×8) (1)
BNC washer (2)
BNC nut (2)
Board holder (4)
15
Installing the Input Adaptor
Install the input adaptor in the follow-
ing order:
1Power block
2GC board
3B block
Before Installing the
Input Adaptor
1Remove the 12 screws that lock
the rear cover of the monitor.
Remove the fan connector on the
rear cover.
2Slide the rear cover back, then lift
and remove it.
3Pull the main bracket forward a
little. Remove the screws on the G
board and remove the cable
between the terminal board and
the G board. (PHM-20M8U)
4Remove the screws on the G
board and remove the G board.
5Install the G board as figure
below.
1
2
Fan connector
Screw M4×8 (3)
Screw
BVTP4×16 (4)
Screw
BVTT4×12 (2)
Screw M4×8 (3)
3
4
G board Screw
BVTP 3×12
Main
bracket
Screw
BVTT 4×8 (2)
G board
5

1-8
16
Installing the Input Adaptor
Installing the Power
Block
1Remove the screw (PS3×8) to
remove the power block shield
case.
2Hook the power block (the shield
case has been removed) on the G
board shield case (see figure).
Lock the power block with the
screw (3×8) (supplied).
1
2
3Install the power block shield case
removed in Step 1. Lock the case
with the screw.
4Lock the power block cables
(black/white and black/red) with
the two purselocks (see figure).
Connect the cable (black/white) to
the CN610 connector on the G
board.
Screw PS3×8
Screw 3×8 (supplied) Shield case
G board Power block
CN610
Purselocks
17
Installing the GC board
Note
Install the GC board after you have
installed the power block.
1Slide and pull out the main
bracket.
2Lift and remove the shield case lid
(left-front of the A board).
3Insert the board holders (supplied)
into the four holes in the shield
case. Match the board holders
and the holes of the GC board,
insert the GC board into the holes.
1
2
Shield case
lid A board Main
bracket
GC board
Board
holders
(supplied)
(4)
(Continued)

1-9
18
Installing the Input Adaptor
4Insert the cable (black/red) from
the power block to the CN1
connector on the GC board.
5Install the shield case so that the
direction of the GC board is the
same as in the figure.
6Connect the CN2 connector on the
GC board and the CN4002
connector on the A board with the
8-pin cable (supplied).
5
4
CN1
8-pin cable (supplied)
CN2 CN4002
Installing the B block
Note
Install the B block after you have
installed the power block and the GC
board.
1Remove the following cables:
– Cable that has been locked by
the purselock on the right side
of the connector panel.
– Cables that connected to 4
connectors (CN3, CN4, CN5
and CN601).
CN601 CN3 CN4 CN5
19
2Remove the pawls that lock the
connector panel. Remove the
connector panel from the main
bracket.
3Remove the 6 screws from the
connector panel. Remove the
connector panel cover.
Connector panel
Connector panel cover
BVTP 3×8 (6)
4From the back of the connector
panel cover, create two holes.
These holes are for installing the
BNC connectors. (Use pinch
pliers as needed.)
5From the back of the connector
board, insert the two BNC
connectors (supplied) through the
two holes. From the front of the
connector board, insert the
washers. Lock the connectors
with the nuts.
6Use the screws to install the
connector panel cover on the
connector board.
7Insert the connector panel in the
main bracket. Reconnect the
cables that were disconnected in
Step 1.
BNC connectors
(supplied)
Washers
(supplied)
Nuts (supplied)
(Continued)

1-10
20
Installing the Input Adaptor
8Adjust the main bracket position.
Insert the B block in the CN4001
and the CN4003 on the A board.
9Connect the IN/MONITOR OUT
plug (BNC connector installed in
Step 5) to the IN/OUT (B block
connector).
10Connect the cable (red/yellow/
black) from the B block fan to the
CN 3 connector on the GC board.
A board
B block
CN4003 CN4001
CN3
After Installing the Input
Adaptor
1Return the G board installed in
Step 5in “Before Installing the
Input Adaptor” to the original
location. Lock the board with the
two screws.
2Reconnect the cables removed in
Step 3in “Before Installing the
Input Adaptor”. Slide the main
bracket back into the unit until it
is set in the original place.
3 Insert the fan connector removed in
Step 1in “Before Installing the
Input Adaptor” into the monitor
connector. Use the screws (12) to
install the rear cover of the monitor.
Note
You cannot turn on the power unless
you connect the fan connector.
Note
Reinstall the components and cables
just as they were before installation
was begun.
21
Rewriting the Service Mode Status
You need to rewrite the service mode
status so that the input adaptor can
accept HD SDI signals. The following
shows how to do this.
1Press the MENU/EXIT button on
the monitor.
The main menu appears.
2To go to the service mode, press
the DEGAUSS and ENTER/
SELECT buttons at the same time.
The service mode status menu
appears.
MENU
EXIT
MENU
COLOR TEMP ADJ...
INPUT CONFIG...
SYSTEM CONFIG...
SERIAL REMOTE...

SELECT
ENTER MENU
ENTER
SELECT
DEGAUSS
BTA 1125 N/S
H. SIZE 238 3
MENU
EXIT ENTER
SELECT
SDI EXIST 0 216
3Press the MENU/EXIT and
ENTER/SELECT buttons as
needed to display “SDI EXIST 0
216” on the screen.
4Using the +/↑button, change “0”
to “1” in “SDI EXIST 0 216.”
5Press the DEGAUSS button.
The “WRITE” message appears.
RESET
SDI EXIST 1 216
DEGAUSS
SDI EXIST 1 216
WRITE
(Continued)

1-11
22
DEGAUSS
SDI EXIST 1 216
WRITE
6Press the DEGAUSS button again
while “WRITE” is displayed.
The “*” appears momentarily,
then disappears.
If the setting has been properly
completed, “ ” appears to the left
of “1.” This indicates that the
service mode status has been
rewritten.
7Press the DEGAUSS and ENTER/
SELECT buttons at the same time.
This terminates the service mode.
8Press the INPUT C switch. Make
sure the indicator (orange) has
been turned on.
You can input the HD SDI signals.
ENTER
SELECT
DEGAUSS
INPUT
C
Rewriting the Service Mode Status

2-1
SECTION 2
CIRCUIT ADJUSTMENTS
The BKM-301HD is an optional board of the PHM-14M8U/20M8U and therefore cannot operate by itself. Consequently
when performing measurements and adjustments, mount it to the PHM series monitor. Use a monitor which satisfies the given
specifications.
The following describes circuit adjustments which must be performed after repairs and maintenance of the BKM-301HD.
B board (Y gain adjustment)
B board (PBgain adjustment)
B board (PRgain adjustment)
2-1. PREPARATIONS
1. Equipment Used
Name Specifications Equipment
Oscilloscope Frequency: Above DC to 150 MHx TEKTRONIX 2445A or equivalent
Above 2 phenomena (ADD mode)
HD SDI signal generator 1080 specifications ShibasokuTG15B6 or equivalent
Monitor HD color monitor SONY PHM-20M8U
PHM-14M8U
2. Tools
Name Parts No. Remarks
1m BNC cable —
Adjusting screwdriver —
3. Connection
CN1
CN3
CN2
CN4002 CN4001
CN4003
DC FAN
Switching regulator
(FAW05-3RO)
G board
CN610
GC board B board
Monitor (A board)
BCN connector
Input/output terminal board 
assembly INPUT C

2-2
2-2. B BOARD ADJUSTMENTS
Use the following tools for adjustments performed when the
parts in the B board have been replaced.
Equipment Used
HD SDI signal generator: TG15B6
Monitor: PHM-20M8U (Or PHM-14M8U)
Oscilloscope
1 m BNC cable
Adjusting screwdriver
Switch, Control Settings
Monitor control panel
INPUT C (HD SDI)................. ON
APERTURE............................. MIN
BRIGHT .................................. 50% (Center click)
CHROMA................................ 50% (Center click)
CONTRAST ............................ 80% (Center click)
Connection Adjusting Point
18 17
2
1
7
CN102
CN101
Oscilloscope
12345
A
B
C
D
E9
11
B board (Side A)
RV102 RV103 RV101
12345
A
B
C
D
E
B board (Side A)