Sony BKM-21D User manual

MAINTENANCE MANUAL
2nd Edition
Serial No. 2100001 and Higher
SDI MULTI DECODER ADAPTOR
BKM-21D

BKM-21D
!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.
WARNING!!
AN INSULATED TRANSFORMER SHOULD BE USED DURING
ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BE-
CAUSE OF LIVE CHASSIS.
THE CHASSIS OFTHIS RECEIVER IS DIRECTLY CONNECTED
TOTHE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BYA !!
!!
!MARKONTHESCHEMATIC
DIAGRAMS, EXPLODEDVIEWS AND INTHE PARTS LIST ARE
CRITICAL TO SAFE OPERATION. REPLACE THESE COMPO-
NENTSWITH SONY PARTSWHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
ATTENTION!!
AFIN D’ÉVITER TOUT RISQUE D’ÉLECTROCUTION
PROVENANT D’UN CHÂSSIS SOUS TENSION, UN
TRANSFORMATEUR D’ISOLEMENT DOITETRE UTILISÉ LORS
DETOUT DÉPANNAGE.
LE CHÂSSIS DE CE RÉCEPTEUR EST DIRECTEMENT
RACCORDÉ Á L’ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS Á LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MAPQUE !!
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!SUR
LES SCHÉMAS DE PRINCIPE,LESVUES EXPLOSÉES ET LES
LISTES DE PIECES SONT D’UNE IMPORTANCE CRITIQUE
POUR LA SÉCURITÉ DU FONCTIONNEMENT. NE LES
REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE
NUMÉRODEPIÈCEESTINDIQUÉDANSLEPRÉSENTMANUEL
OU DANS DES SUPPLÉMENTS PUBLIÉS PAR SONY.

1 (E)
BKM-21D
Table of Contents
1. Operating Instructions............................................ 1-1 (E)
2. Service Informations
2-1. BD Board Removal and Check .............................................................2-1 (E)
3. Electrical Adjustments
3-1. Preparations for BD Board Adjustments...............................................3-1 (E)
3-2. Analog NTSC Mode Adjustment..........................................................3-6 (E)
3-2-1. NTSC Burst Gate Pulse Adjustment (BD Board) ................3-6 (E)
3-2-2. NTSC Chroma Clamp Pulse Adjustment (BD Board).........3-6 (E)
3-2-3. NTSC VCO Adjustment (BD Board) ..................................3-7 (E)
3-2-4. NTSC A/D Input Level Adjustment (BD Board) ................3-7 (E)
3-2-5. NTSC PHASE Adjustment (BD Board) ..............................3-7 (E)
3-2-6. NTSC Output Level Adjustment (BD Board)......................3-8 (E)
3-2-7. NTSC Y/C DELAY Adjustment (BD Board)......................3-9 (E)
3-2-8. NTSC VIDEO OUT Level Adjustment (BD Board) .........3-11 (E)
3-2-9. NTSC KILLER Level Adjustment (BD Board).................3-11 (E)
3-3. Analog PAL Mode Adjustment ..........................................................3-11 (E)
3-3-1. PAL-S Burst Gate Pulse Adjustment (BD Board) .............3-11 (E)
3-3-2. PAL-S Chroma Clamp Pulse Adjustment (BD Board) ......3-12 (E)
3-3-3. PAL H BLK Pulse Adjustment (BD Board) ......................3-12 (E)
3-3-4. PAL VCO Adjustment (BD Board) ...................................3-13 (E)
3-3-5. PAL A/D Input Level Adjustment (BD Board) .................3-13 (E)
3-3-6. PAL-S PHASE Adjustment (BD Board) ...........................3-13 (E)
3-3-7. PAL-S Output Level Adjustment (BD Board) ...................3-14 (E)
3-3-8. PAL-S Y/C DELAY Adjustment (BD Board) ...................3-15 (E)
3-3-9. PAL-S KILLER Level Adjustment (BD Board)................3-17 (E)
3-3-10. PAL VIDEO OUT Level Adjustment (BD Board)............3-17 (E)
3-3-11. PAL-D Burst Gate Pulse Adjustment (BD Board) ............3-17 (E)
3-3-12. PAL-D Chroma Clamp Pulse Adjustment (BD Board) .....3-18 (E)
3-3-13. PAL-D Y/C DELAY Adjustment (BD Board) ..................3-18 (E)
3-3-14. PAL-D KILLER Level Adjustment (BD Board) ...............3-19 (E)
3-3-15. PAL-D PHASE Adjustment (BD Board)...........................3-19 (E)
3-3-16. PAL-D Output Level Adjustment (BD Board) ..................3-19 (E)
3-4. Analog Component, RGB Adjustment ...............................................3-20 (E)
3-4-1. Y/R-Y/B-Y Level Adjustment (BD Board) .......................3-20 (E)
3-4-2. RGB Level Adjustment (BD Board) ..................................3-20 (E)
3-5. Digital Mode Adjustment....................................................................3-21 (E)
3-5-1. SDI Freerunning Adjustment (BD Board) .........................3-21 (E)
3-5-2. D1 Output Level Adjustment (BD Board) .........................3-22 (E)

2 (E) BKM-21D
3-5-3. D1 Y/C DELAY Adjustment (BD Board) .........................3-23 (E)
3-5-4. D1 H PHASE Adjustment (BD Board)..............................3-25 (E)
3-5-5. D2 NTSC A/D Input Level Adjustment (BD Board).........3-25 (E)
3-5-6. D2 NTSC PHASE Adjustment (BD Board) ......................3-26 (E)
3-5-7. D2 NTSC VIDEO OUT Level Adjustment (BD Board) ...3-26 (E)
3-5-8. D2 NTSC Output Level Adjustment (BD Board) ..............3-26 (E)
3-5-9. D2 PAL A/D Input Level Adjustment (BD Board) ...........3-27 (E)
3-5-10. D2 PAL VIDEO OUT Level Adjustment (BD Board) ......3-27 (E)
3-5-11. D2 PAL Output Level Adjustment (BD Board) ................3-28 (E)
4. Circuit Descriptions
4-1. Serial Digital Signal System .................................................................4-1 (E)
4-1-1. Input Circuit .........................................................................4-1 (E)
4-1-2. Decoder Circuit ....................................................................4-1 (E)
4-1-3. Low Pass Filter, Amplifier Circuit .......................................4-2 (E)
4-1-3-1. Y signal .......................................................................4-2 (E)
4-1-3-2. B-Y Signal, R-Y Signal...............................................4-2 (E)
4-1-4. EXTERNAL-DIGITAL Input Circuit..................................4-2 (E)
4-1-5. DIGITAL FORMAT Detection Circuit ...............................4-2 (E)
4-1-6. D2 D/A Video Signal Output Circuit ...................................4-2 (E)
4-2. Analog Signal System ...........................................................................4-3 (E)
4-2-1. Input Switching Circuit, Aperture Compensation Circuit,
Output Circuit.......................................................................4-3 (E)
4-2-1-1. Composite Video Signal Input Switching Circuit
(Q401 to 403, 433, 501 to 503, 522, 601 to 603, 624) ..............4-3 (E)
4-2-1-2. Y/R-Y/B-Y Signal Input Circuit
(Q401, 420, 421, 434, 501, 520, 521,
523, 601, 625, 640, 641)............................................................4-3 (E)
4-2-1-3. R/G/B Signal Input Circuit
(Q401, 501, 601, 605 to 607, 611 to 614) .................................4-3 (E)
4-2-1-4. Aperture Compensation Circuit
(IC501, Q408, 409, 505 to 509, 512 to 514) .............................4-3 (E)
4-2-1-5. R-Y/B-Y Signal Delay Circuit
(Q404, 418, 419, 422 to 425, 450) ............................................4-3 (E)
4-2-1-6. Level Adjustment Circuit, Output Circuit
(IC401, 502, 601, 602, Q413 to 415,
515 to 517, 615, 616, 619 to 623) .............................................4-3 (E)
4-2-1-7. Composite Video I/O Circuit ......................................4-3 (E)
4-3. A/D Conversion Circuit (IC300, IC341)...............................................4-3 (E)
4-4. Timing Pulse Generation Circuit ..........................................................4-4 (E)
4-4-1. Sync Separation Circuit (IC308) ..........................................4-4 (E)
4-4-2. B.G.P Generation (IC310, 321)............................................4-4 (E)
4-4-3. C.CL.P Generation/D1 HSYNC Delay Circuit
(IC322, 352, 376) .................................................................4-4 (E)
4-4-4. HBLK Pulse Generation (IC311, 322) .................................4-4 (E)

3 (E)
BKM-21D
4-4-5. KILLER Detection (IC325, 327, 326) .................................4-4 (E)
4-4-6. APC Circuit (IC332 to 338) .................................................4-4 (E)
4-5. Control Circuit ......................................................................................4-4 (E)
5. Semiconductors ............................................................ 5-1
6. Spare Parts
6-1. Notes on Repair Parts..................................................................................6-1
6-2. Exploded Views ..........................................................................................6-2
6-3. Electrical Parts List .....................................................................................6-3
6-4. Supplied Accessories ................................................................................6-15
7. Block Diagrams
BD (1/4) ......................................................................................................7-1
BD (2/4) ......................................................................................................7-2
BD (3/4) ......................................................................................................7-3
BD (1/4) ......................................................................................................7-4
BD2 .............................................................................................................7-5
8. Diagrams
8-1. Schematic Diagrams and Printed Wiring Boards........................................8-2
Schematic Diagrams
BD (1/11) ....................................................................................................8-4
BD (2/11) ....................................................................................................8-5
BD (3/11) ....................................................................................................8-6
BD (4/11) ....................................................................................................8-7
BD (5/11) ....................................................................................................8-8
BD (6/11) ....................................................................................................8-9
BD (7/11) ..................................................................................................8-10
BD (8/11) ..................................................................................................8-11
BD (9/11) ..................................................................................................8-12
BD (10/11) ................................................................................................8-13
BD (11/11) ................................................................................................8-14
BD2 (1/2) ..................................................................................................8-19
BD2 (2/2) ..................................................................................................8-20
Printed Wiring Boards
BD ...............................................................................................................8-2
BD2 ...........................................................................................................8-18
http://getMANUAL.com

1-1 (E)
BKM-21D
Section 1
Operating Instructions Extracted from the
operating instructions
SDI Multi Decoder Adaptor
BKM-21D
[Japanese/English]
INSTALLATION MANUAL
1st Edition (Revised 5)
Serial No. 2100001 and Higher (BKM-21D)

1-2 (E) BKM-21D
For 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.
The shielded interface cable recommended in this manual
must be used with this equipment in order to comply with the
limits for a digital device pursuant to Subpart B of Part 15 of
FCC Rules.
For the customers in Europe
This product with the CE marking complies with both the
EMC Directive (89/336/EEC) and the Low Voltage Directive
(73/23/EEC) issued by the Commission of the European
Community.
Compliance with these directives implies conformity to the
following European standards:
• EN60950: Product Safety
• EN55103-1: Electromagnetic Interference (Emission)
• EN55103-2: Electromagnetic Susceptibility (Immunity)
This product is intended for use in the following
Electromagnetic Environment(s):
E1 (residential), E2 (commercial and light industrial), E3
(urban outdoors) and E4 (controlled EMC environment, ex.
TV studio).
Pour les clients européens
Ce produit portant la marque CE est conforme à la fois à la
Directive sur la compatibilité électromagnétique (EMC) (89/
336/CEE) et à la Directive sur les basses tensions (73/23/
CEE) émises par la Commission de la Communauté
européenne.
La conformité à ces directives implique la conformité aux
normes européennes suivantes:
• EN60950: Sécurité des produits
• EN55103-1: Interférences électromagnétiques (émission)
• EN55103-2: Sensibilité électromagnétique (immunité)
Ce produit est prévu pour être utilisé dans les
environnements électromagnétiques suivants:
E1 (résidentiel), E2 (commercial et industrie légère), E3
(urbain extérieur) et E4 (environnement EMC contrôlé ex.
studio de télévision).
Für Kunden in Europa
Dieses Produkt besitzt die CE-Kennzeichnung und erfüllt
sowohl die EMV-Direktive (89/336/EEC) als auch die
Direktive Niederspannung (73/23/EEC) der EG-Kommission.
Die Erfüllung dieser Direktiven bedeutet Konformität für die
folgenden Europäischen Normen:
• EN60950: Produktsicherheit
• EN55103-1: Elektromagnetische Interferenz (Emission)
• EN55103-2: Elektromagnetische Empfindlichkeit
(Immunität)
Dieses Produkt ist für den Einsatz unter folgenden
elektromagnetischen Bedingungen ausgelegt:
E1 (Wohnbereich), E2 (kommerzieller und in beschränktem
maße industrieller Bereich), E3 (Stadtbereich im Freien) und
E4 (kontrollierter EMV-Bereich, z.B. Fernsehstudio).
1(E)
Table of Contents
English
BKM-20D SDI 4:2:2 Decoder Adaptor ............................................. 3(E)
Functions .........................................................................................3(E)
Using the Input and output Connectors...........................................3(E)
Specifications ..................................................................................4(E)
BKM-21D SDI Multi Decoder Adaptor ............................................ 5(E)
Functions .........................................................................................5(E)
Using the Input and Output Connectors ..........................................5(E)
Specifications ..................................................................................6(E)
BKM-22X SDI Input Expansion Adaptor......................................... 8(E)
Functions .........................................................................................8(E)
Using the Input and Output Connectors ..........................................8(E)
Specifications ..................................................................................9(E)
BKM-24N NTSC Decoder Adaptor ................................................. 10(E)
Functions .......................................................................................10(E)
Using the Input and Output Connectors ........................................10(E)
Specifications ................................................................................11(E)
BKM-25P PAL Decoder Adaptor .................................................... 12(E)
Functions .......................................................................................12(E)
Using the Input and Output Connectors ........................................12(E)
Specifications ................................................................................13(E)
BKM-26M PAL-M Decoder Adaptor.............................................. 14(E)
Functions .......................................................................................14(E)
Using the Input and Output Connectors ........................................14(E)
Specifications ................................................................................15(E)
BKM-27T Tri-Standard Decoder Adaptor .................................... 16(E)
Functions .......................................................................................16(E)
Using the Input and Output Connectors ........................................16(E)
Specifications ................................................................................17(E)
BKM-28X Analog Input Expansion Adaptor ................................. 18(E)
Functions .......................................................................................18(E)
Using the Input and Output Connectors ........................................18(E)
Specifications ................................................................................19(E)
Combination of Multiple Adaptors.................................................. 20(E)
Installing into Video Monitors ......................................................... 21(E)

1-3 (E)
BKM-21D
5(E)
BKM-21D SDI Multi Decoder Adaptor
IN
1
OUT
DIGITAL
ANALOG
IN
2
OUT
IN
3
OUT
IN
OUT
IN
OUT
IN
OUT
4
5
6
1
2
3
4
5
6
7
8
9
0
!¡
!™
Serial digital signals
Serial digital signals
Serial digital signals
Y
B–Y
R–Y
G
B
R
Analog
composite
signals
Analog
composite
signals
Analog
composite
signals
Monitor model name
BVM-20E1/14E1/14E5
BVM-20F1/14F1/14F5
BVM-20G1/14G1/14G5
BVM-D32E1W
BVM-D24E1W
BVM-D20F1
Software version
1.40 or higher
1.10 or higher
1.20 or higher
Serial Digital and Analog Input and Output
Signal Connectors
The BKM-21D is equipped with three input and three
output connectors for serial digital signals, as well as
three input and three output connectors for analog
signals. Using the analog signal input connectors, you
can input one Y/R–Y/B–Y or one RGB signal, or three
analog composite signals. The types of analog
composite signals that may be input vary depending on
the input adaptors installed in other input option slots
(see page 20(E)).
Using the Input and Output
Connectors
For information about installing the BKM-21D in a video
monitor input option slot, see “Installing into Video
Monitors” (page 21(E)).
Configuration of Input/Output Connectors
and Signals that may be Input
The configuration of the input and output connectors
and the signals that may be input are shown below.
The BKM-21D SDI Multi Decoder Adaptor is a video
signal input adaptor for BVM-Series video monitors.
When installed in an input option slot on the rear panel
of the video monitor, it provides video input and
output connectors for the monitor and a decoder for
serial digital signals and analog composite (NTSC/
PAL) signals.
Notes
•Before installing this adaptor, check the adaptor serial
number and the software version of your video
monitor. If the adaptor serial number is 2100001 or
higher, and the software version is lower than the
version indicated for your monitor in the following
table, then you need to upgrade the software before
installing the adaptor. You can check the software
version of your video monitor on the STATUS
MENU.
•When installing or moving adaptors, or fitting a cover
plate over an unused slot, always fit the BKM-21D
as the last step of the operation. If a BKM-21D is
already installed, remove it temporarily while
carrying out the other operations, then reinstall it last
(see page 22(E)).
Functions
Decoders for Serial Digital Signals and
Analog Composite Signals
The BKM-21D is equipped with a decoder for serial
digital signals (525/625 component and NTSC/PAL
composite), and with a decoder for analog composite
NTSC and PAL signals.

1-4 (E) BKM-21D
6(E)
Input of serial digital signals
You can input serial digital signals to connectors 1,
3, and 5. You can obtain active loop-through output
of those signals from connectors 2, 4, and 6,
respectively.
You need not attach 75-ohm terminations to
connectors 2, 4, and 6.
Input of analog composite signals
You can input analog composite signals to connectors
7, 9, and !¡. You can obtain loop-through output of
those signals from connectors 8, 0, and !™,
respectively. If you do not wish to use loop-through
output, attach 75-ohm terminators to connectors 8,
0, and !™.
Input of Y/R–Y/B–Y or RGB signals
You can input a Y or G signal to connector 7, an B–Y
or B signal to connector 9, and a R–Y or R signal to
connector !¡. You can obtain loop-through output of
those signals from connectors 8, 0, and !™,
respectively. If you do not wish to use loop-through
output, attach 75-ohm terminators to connectors 8,
0, and !™.
Assigning Input Signals to Connectors
Before inputting signals to the BKM-21D, you must
specify the type and format of the signal that will be
input to each connector. To assign input signals to
each connector, use the on-screen INPUT
CONFIGURATION menu of your video monitor.
For information about using the INPUT CONFIGURATION
menu, refer to the manual of your video monitor.
Specifications
General
Power requirements +5 V, ±6 V, –15 V (supplied
from the monitor)
Power consumption 11 W
Recommended operating temperature
20°C to 30°C (68°F to 86°F)
Permissible operating temperature
0°C to 40°C (32°F to 104°F)
Operating humidity 0% to 90% (no condensation)
Maximum external dimensions (w/h/d)
25 ×256 ×245 mm
(
31
/ 32
×10
1
/ 8
×9
3
/ 4 inches)
Mass 770g (1 lb 11oz)
Input/Output Connectors
Digital input BNC × 3, with active loop-
through output
Analog input BNC × 3, high impedance, with
loop-through output
Signal Characteristics
Analog composite signals
Signal level 1 Vp-p +3 dB/–6 dB
Luminance signal
Frequency characteristics
Filter off: 100 Hz to 5 MHz ±1 dB
(monochrome signal)
Filter on: –30 dB relative to subcarrier
frequency
Chrominance signals
Demodulation axis
NTSC, PAL: R–Y/B–Y
Chrominance signal band (R–Y, B–Y)
NTSC
COMB filter:
0.9 MHz–3dB
TRAP/BPF filter:
0.7 MHz–3dB
PAL
COMB filter:
1.1 MHz–3dB
TRAP/BPF filter:
0.9 MHz–3dB
Subcarrier reproduction error
±1% max.
Subcarrier synchronization range
±150 Hz min.
Chroma phase adjustment range
NTSC: ±15°min.
PAL: ±10°min.
DG (differential gain) APL 10% to 90%
2% max.
DP (differential phase) APL 10% to 90%
2°max.
Chrominance signal/luminance signal
Delay error 35 nsec max.
Gain error 5% max.
BKM-21D SDI Multi Decoder Adaptor
7(E)
Aperture compensation
6 dB min. (5 MHz)
Return loss –46 dB min. (7 MHz)
Analog component (Y/R–Y/B–Y, RGB) signals
Signal level
Y/R–Y/B–Y Y: 1 Vp-p ±6 dB
R–Y: 0.7 Vp-p ±6 dB
B–Y: 0.7 Vp-p ±6 dB
R/G/B 1 Vp-p ±6 dB (sync on G)
Frequency characteristics
Y 100 Hz to 10 MHz ±1 dB
R–Y/B–Y 100 Hz to 6 MHz ±1 dB
R/G/B 100 Hz to 10 MHz ±1 dB
Chrominance signal/luminance signal
Delay time error
30 nsec max.
Gain error 5% max.
Aperture compensation (Y/R–Y/B–Y)
6 dB min. (5 MHz)
Return loss –46 dB min. (7MHz)
Digital component (525, 625) and composite
(NTSC, PAL) signals
Component
Sampling frequency
Y: 13.5 MHz
R–Y/B–Y: 6.75 MHz
Frequency characteristics
Y: 100 Hz to 5.75 MHz ±1 dB
R–Y/B–Y: 100 Hz to 2.75 MHz
±1 dB
K factor 1% max. (2T pulse)
Composite
Sampling frequency
NTSC: 14.3 MHz
PAL: 17.7 MHz
Frequency bandwidth
Y: 100 Hz to 5 MHz ±1 dB
R–Y/B–Y:
NTSC
COMB filter:
0.9 MHz–3dB
TRAP/BPF filter:
0.7 MHz–3dB
PAL
COMB filter:
1.1 MHz–3dB
TRAP/BPF filter:
0.9 MHz–3dB
Chrominance/luminance signals
Delay time error: 35 nsec max.
Gain error: 5% max.
K factor 1% max. (2T pulse)
Aperture compensation
6 dB min. (5 MHz)
Quantization 10 bits/sample
Transmission distance
200 m (approx. 656 ft) max.
(When using 5C–2V coaxial
cables (Fujikura, Inc.) or
equivalent.)
Return loss 5 MHz to 270 MHz –15 dB min.
Accessories Supplied
Installation Manual (1)
Design and specifications are subject to change
without notice.

1-5 (E)
BKM-21D
20(E)
You can configure an input and output connector panel
by installing any combination of adaptors in the input
option slots on the rear panel of the video monitor.
By combining adaptors of different types, you gain
access to a wider range of input signals than would be
possible with a single adaptor type.The input signals
made available by different combinations of adaptor
types are shown in the table below.
The number of input option slots varies with video
monitors, and to specify signal types for each input
connector, use the on-screen INPUT
CONFIGURATION menu of your video monitor.
Note
Only one BKM-22X board can be installed in the
monitor togrther with either the BKM-20D or the
BKM-21D.
Combination of Multiple Adaptors
For information about the input option slots and using the
INPUT CONFIGURATION menu, refer to the manual of
your video monitor.
Internal Connections between Decoders
When you install a decoder adaptor (BKM-20D/21D/
24N/26P/26M/27T), it is connected to the other
adaptors installed in your video monitor’s input option
slots over an internal bus. Therefore, if you install a
decoder adaptor for a given signal, you can decode that
signal even when it is input to another adaptor.
Y/C
PAL
BKM-21D
SDI Multi
Decoder
Adaptor
Adaptor name
BKM-24N
NTSC
Decoder
Adaptor
BKM-25P
PAL
Decoder
Adaptor
BKM-26M
PAL-M
Decoder
Adaptor
BKM-27T
Tri-
Standard
Decoder
Adaptor
BKM-22X
SDI Input
Expansion
Adaptor
BKM-28X
Analog
Input
Expansion
Adaptor
Composite
NTSC
Composite
PAL
Composite
NTSC
Composite
PAL
Composite
PAL-M
Component
525/625
Composite
SECAM
Y/R–Y/B–Y
525/625
RGB 525/
625
Y/C
NTSC
Serial
digital
input
Analog
input
O
O
O
O
O
®
®
O
O
O
®
®
®
O
O
O
®
O
®
®
O
O
O
®
®
O
®
O
O
O
O
®
O
O
O
O
O
®
®
®
®
®
®
®
O
O
®
®
®
®
O
O
®
®
®
®®
®
BKM-20D
SDI 4:2:2
Decoder
Adaptor
O
®
®
®
O
O
Number of analog
input
Number of digital
inputs
Y/C
PAL-M
33666636
33––––3–
O: Independent input possible
®: Input possible when used with decoder adaptor
®® ® ®
O
®
®
®
21(E)
Installing intoVideo Monitors
Each adaptor can be installed in any input option slot.
Always turn your video monitor’s MAIN POWER
switch off before installing or removing adaptors.
1Remove the cover of an input
option slot on the rear panel of
your video monitor.
2Insert the adaptor below the
alignment mark on the left of
the upper screw hole of the
slot.
3Push the adaptor in until it is
firmly seated in the connector
inside your video monitor.
4Tighten the both screws to
retain the adaptor.
Check to be sure that the
video monitor’s MAIN POWER
switch is off.
Cover of an input option slot
Alignment mark
Insert the adaptor
below the mark.

1-6 (E) BKM-21D
22(E)
Note on using the BKM-20D/21D/41HD/42HD
connectors board installed, or a cover plate fitted (see
Fig. 1), the radiation shield (see Fig. 2) of the BKM-
20D/21D/41HD/42HD may be damaged or detached.
Fig.1
Input adaptor
Cover plate
Input option slots
Analog input connectors board
Fig. 2
Radiation shield
BKM-20D/21D/
41HD/42HD
Input adaptor, etc
When one of the input option slots on the rear of the
monitor has a BKM-20D/21D/41HD/42HD SDI
Decoder Adaptor (option) installed, if the slot to the
right has another adaptor or the analog input
Installing intoVideo Monitors
Printed in Japan
2001.02.08
1995
BKM-21D
3-810-095-06(1)
Sony Corporation
Communication System Solutions Network Company

2-1 (E)
BKM-21D
Section 2
Service Informations
2-1. BD Board Removal and Check
1BD board
(Loosen two panel stopper screws.)
2Extension board/Cable kit (Z board)
(A-1394-806-A)
*Insert the Z board into the slot.
And insert the BD board
into the connector on the Z board.

3-1 (E)
BKM-21D
BKM-21D is an optional board for the BVM series
monitors and unable to operate on its own. To adjust and
measure it, BKM-21D must be mounted with a BVM
series monitor. The BVM series monitor used in these
adjustments should satisfy the respective specifications and
should equip with the software after versions (STATUS
MENU) mentioned below or higher.
Monitor Model No. Destination SoftwareVersion
BVM-20E1/14E1/14E5 J, U, E, A 1.40~
BVM-20F1/14F1/14F5 J, U, E, A
BVM-20G1/14G1/14G5 J, U, E, A 1.10~
BVM-D32E1W J, U, E, A
BVM-D24E1W J, U, E, A 1.20~
BVM-D20F1 J, U, E, A
3-1. Preparations for BD Board
Adjustments
Mount the BKM-21D via the extension board.
. Unless specified otherwise, input the color bar signal
(100% WHITE REF 100% AMPL).
Set as follows in the INPUT CONFIGURATION menu of
the SETUP menu.
. 01 CH
FORMAT ............ NTSC-0
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 4
YC SEP ............... 3 LINES COMB
SYNC MODE ..... INT
APERTURE ........ OFF
FILTER ............... OFF
CONTROL.......... PRESET
H PHASE ............ 000
. 02 CH
FORMAT ............ PAL-S
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 4
Same as 01 CH for others
. 03 CH
FORMAT ............ PAL-D
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 4
Same as 01 CH for others
. 04 CH
FORMAT ............ YUV
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 456
SYNC MODE ..... INT
. 05 CH
FORMAT ............ RGB
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 456
SYNC MODE ..... INT
. 06 CH
FORMAT ............ SDI 422
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 1
SYNC MODE ..... INT
. 07 CH
FORMAT ............ SDI 422
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 2
SYNC MODE ..... INT
. 08 CH
FORMAT ............ SDI 422
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 3
SYNC MODE ..... INT
. 09 CH
FORMAT ............ SDI PAL-S
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 1
Same as 01 CH for others






Section 3
Electrical Adjustments
http://getMANUAL.com

3-2 (E) BKM-21D
. 10 CH
FORMAT ............ SDI PAL-S
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 2
Same as 01 CH for others
. 11 CH
FORMAT ............ SDI PAL-S
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 3
Same as 01CH for others
. 12 CH
FORMAT ............ SDI NTSC
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 1
Same as 01 CH for others
. 13 CH
FORMAT ............ SDI NTSC
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted)
INPUT NO .......... 2
Same as 01 CH for others
. 14 CH
FORMAT ............ SDI NTSC
SLOT NO ............ n (Set to the slot number with the
BKM-21D inserted.)
INPUT NO .......... 3
Same as 01 CH for others

3-3 (E)
BKM-21D
[Connection]
. .
. .
. Analog NTSC mode
. .
. .
. Analog PAL mode
NTSC composite video signal
NTSC composite
signal generator
NTSC 100% color bar
full-field 0% set up
BKM-10R BVM-20F1U
Extension board
(Z board)
Oscilloscope
75 Z terminator
BKM-21D
PAL composite video signal
PAL composite signal generator
PAL 100% color bar
full-field 0% set up
BKM-10R BVM-20F1U
Extension board
(Z board)
Oscilloscope
75 Z terminator
BKM-21D

3-4 (E) BKM-21D
. .
. .
. Analog component mode
. .
. .
. Digital mode
Component signal generator
Y/R-Y/B-Y 100% color bar
or
RGB 100% color bar
BKM-10R BVM-20F1U Oscilloscope
75 Z terminator x 3
Y/G terminal
B-Y/ B terminal
R-Y/R terminal
BKM-21D
YUV SMPTE/EBU-N10 signal
or
RGB signal
Extension board
(Z board)
Digital signal generator
(100% color bar signal)
BKM-10R BVM-20F1U Oscilloscope
Extension board
(Z board)
BKM-21D
D1 525/60 signal or
D1 625/50 signal,
D2 NTSC signal,
D2 PAL signal

3-5 (E)
BKM-21D
[Layout of Adjustment-Related Parts]
IC802
TP301
TP302
TP303
TP310
TP313
TP312
TP311 TP450
IC325
85
14
32
33 2019
5152 1
64 32
1
BA
TP201
TP101
TP601
TP501
BD BOARD (Component side)

3-6 (E) BKM-21D
3-2. Analog NTSC Mode Adjustment
Set CH 01.
3-2-1. NTSC Burst Gate Pulse Adjustment
(BD Board)
n
The following adjustment menu is below the BKM-21D
menu of the MAINTENANCE menu.
BGP-P (BURST GATE PULSE-POSITION)
BGP-W (BURST GATE PULSE-WIDTH)
1. Input the composite NTSC 100% color bar signal into
the VIDEO 4 input terminal.
(Full-field 0% set up)
2. Connect the CH1 probe of the oscilloscope to Pin 7
of IC325 of the BD board and connect the CH2 probe
to TP311 of the BD board.
3. Adjust the BGP-P (BURST GATE PULSE-POSI-
TION) data so that the position A of the burst gate
pulse satisfies the specification.
4. Adjust the BGP-W (BURST GATE PULSE-WIDTH)
data so that the width B of the burst gate pulse satisfies
the specification.
Fig. 2-1.
APC PB OUT
(IC325-7)
Burst gate pulse
(TP311)
Enlargement
APC PB OUT
Burst gate pulse
Specification A = 2.5 ±0.1 usec
Specification B = 5.0 ±0.2 usec
B
A
a
b
a = b
APC PB OUT
(IC325-7)
Chroma clamp
pulse (TP312)
Enlargement
APC PB OUT
Chroma clamp
pulse
Specification A = 6.0 ±0.3 usec
a
b
A
a = b
3-2-2. NTSC Chroma Clamp Pulse
Adjustment (BD Board)
n
The following adjustment menu is below the BKM-21D
menu of the MAINTENANCE menu.
CCP-P (CHROMA CLAMP PULSE-POSITION)
1. Input the composite NTSC 100% color bar signal into
the VIDEO 4 input terminal.
(Full-field 0% set up)
2. Connect the CH1 probe of the oscilloscope to Pin 7
of IC325 of the BD board and connect the CH2 probe
to TP312 of the BD board.
3. Adjust the CCP-P (CHROMA CLAMP PULSE-
POSITION) data so that the position A of the chroma
clamp pulse satisfies the specification.
Fig. 2-2.