Name: Sony BKM-21D
Brand: Sony
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MAINTENANCE MANUAL

2nd Edition

Serial No. 2100001 and Higher

SDI MULTI DECODER ADAPTOR

BKM-21D

Table of Contents3
Service Informations13
BD Board Removal and Check13
Electrical Adjustments15
Preparations for BD Board Adjustments15
Analog NTSC Mode Adjustment20
NTSC Burst Gate Pulse Adjustment (BD Board)20
NTSC Chroma Clamp Pulse Adjustment (BD Board)20
NTSC VCO Adjustment (BD Board)21
NTSC A/D Input Level Adjustment (BD Board)21
NTSC PHASE Adjustment (BD Board)21
NTSC Output Level Adjustment (BD Board)22
NTSC VIDEO out Level Adjustment (BD Board)25
NTSC KILLER Level Adjustment (BD Board)25
Analog PAL Mode Adjustment25
PAL-S Burst Gate Pulse Adjustment (BD Board)25
PAL-S Chroma Clamp Pulse Adjustment (BD Board)26
PAL H BLK Pulse Adjustment (BD Board)26
PAL VCO Adjustment (BD Board)27
PAL A/D Input Level Adjustment (BD Board)27
PAL-S PHASE Adjustment (BD Board)27
PAL-S Output Level Adjustment (BD Board)28
PAL-S KILLER Level Adjustment (BD Board)31
PAL VIDEO out Level Adjustment (BD Board)31
PAL-D Burst Gate Pulse Adjustment (BD Board)31
PAL-D Y/C DELAY Adjustment (BD Board)32
PAL-D KILLER Level Adjustment (BD Board)33
PAL-D PHASE Adjustment (BD Board)33
PAL-D Output Level Adjustment (BD Board)33
Analog Component, RGB Adjustment34
Y/R-Y/B-Y Level Adjustment (BD Board)34
RGB Level Adjustment (BD Board)34
Digital Mode Adjustment35
SDI Freerunning Adjustment (BD Board)35
D1 Output Level Adjustment (BD Board)36
D1 Y/C DELAY Adjustment (BD Board)37
D1 H PHASE Adjustment (BD Board)39
D2 NTSC A/D Input Level Adjustment (BD Board)39
D2 NTSC PHASE Adjustment (BD Board)40
D2 NTSC Output Level Adjustment (BD Board)40
D2 PAL A/D Input Level Adjustment (BD Board)41
D2 PAL VIDEO out Level Adjustment (BD Board)41
D2 PAL Output Level Adjustment (BD Board)42
Circuit Descriptions43
Serial Digital Signal System43
Input Circuit43
Decoder Circuit43
Low Pass Filter, Amplifier Circuit44
Y Signal44
B-Y Signal, R-Y Signal44
EXTERNAL-DIGITAL Input Circuit44
DIGITAL FORMAT Detection Circuit44
D2 D/A Video Signal Output Circuit44
Analog Signal System45
Output Circuit45
(Q401, 501, 601, 605 to 607, 611 to 614)45
Aperture Compensation Circuit45
Level Adjustment Circuit, Output Circuit (IC401, 502, 601, 602, Q413 to 415, 515 to 517, 615, 616, 619 to 623)45
Composite Video I/O Circuit45
A/D Conversion Circuit (IC300, IC341)45
Timing Pulse Generation Circuit46
Sync Separation Circuit (IC308)46
Generation (IC310, 321)46
C.CL.P Generation/D1 HSYNC Delay Circuit46
HBLK Pulse Generation (IC311, 322)46
KILLER Detection (IC325, 327, 326)46
APC Circuit (IC332 to 338)46
Control Circuit46
Semiconductors47
Spare Parts49
Notes on Repair Parts49
Exploded Views50
Electrical Parts List51
Supplied Accessories63
Block Diagrams65
Bd269
Diagrams71
Schematic Diagrams and Printed Wiring Boards72
Bd2 (1/2)89
Bd2 (2/2)90
Bd290

Brand	Sony
Model	BKM-21D
Category	Adapter
Language	English

Sony BKM-21D User Manual

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