Sony BKM-301HD User manual

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