Sony BVW-55 User manual

VIDEOCASSETTE RECORDER
BVW-55
MAINTENANCE MANUAL Part 2
Volume 1 1st Edition
Serial No. 10001 and Higher

BVW-55 P2
!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.

CAUTION
Danger of explosion if battery is incorrectly
replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according to the
manufacturer’s instructions.
Vorsicht!
Explosionsgefahr bei unsachgemäßem
Austausch der Batterie.
Ersatz nur durch denselben oder einen vom
Hersteller empfohlenen ähnlichen Typ.
Entsorgung gebrauchter Batterien nachAngaben
des Herstellers.
ATTENTION
Il y a danger d’explosion s’il y a remplacement
incorrect de la batterie.
Remplacer uniquement avec une batterie du
même type ou d’un type équivalent recommandé
par le constructeur.
Mettre au rebut les batteries usagées
conformément aux instructions du fabricant.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig
håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
1 (P)
For the customers in the U.S.A. and Canada
RECYCLING NICKEL-CADMIUM
BATTERIES
Nickel Cadmium batteries are
recyclable. You can help preserve our
environment by returning your unwanted
batteries to your nearest point for
collection, recycling or proper disposal.
Note: In some areas the disposal of
nickel cadmium batteries in household or business trash
may be prohibited.
RBRC (Rechargeable Battery Recycling Corporation)
advises you about spent battery collection by the
following phone number.
Call toll free number: 1-800-822-8837
(United States and Canada only)
Caution: Do not handle damaged or leaking nickel-
cadmium batteries.
Voor de klanten in Nederland
Dit apparaat bevat een (CF)n-Li batterij voor memory
back-up.
Raadpleeg uw leverancier over de verwijdering van de
batterij op het moment dat u het apparaat bij einde
levensduur afdankt.
Gooi de batterij niet weg. maar lever hem in als KCA.
Bij dit produkt zijn batterijen geleverd.
Wanneer deze leeg zijn, moet u ze niet
weggooien maar inleveren als KCA.
BVW-55 P2

1
BVW-55 P2
Table of Contents
Manual Structure
Purpose of this manual .............................................................................................. 5
Related manuals......................................................................................................... 5
Contents ..................................................................................................................... 6
1. Service Overview
1-1. Board Extension ..........................................................................................1-1
1-1-1. Plug-in Board .............................................................................1-1
1-1-2. RP-107 Board.............................................................................1-2
1-1-3. DM-121 Board ...........................................................................1-6
1-2. Fixtures and Adjustment Equipment List ...................................................1-7
1-2-1. Equipment for Adjustment .........................................................1-7
1-2-2. Fixtures.......................................................................................1-8
1-3. Alignment Tape.........................................................................................1-10
1-4. Disconnecting/Connecting Flexible Card Wire ........................................1-12
1-5. NV-RAM/EEPROM .................................................................................1-13
1-5-1. Initialization and Adjustment ...................................................1-13
1-6. PLCC IC Removal ....................................................................................1-15
2. Maintenance Mode
2-1. Overview of Maintenance Mode.................................................................2-1
2-2. TAPE Maintenance Mode (M0)..................................................................2-6
2-2-1. Overviews ..................................................................................2-6
2-2-2. SERVO ADJUST Mode (A0) ..................................................2-11
2-2-3. BETACAM REC ADJUST Mode (A1)...................................2-18
2-2-4. AUDIO/VIDEO ADJUST Mode (A2).....................................2-21
2-2-5. BETACAM PB ADJUST Mode (A3)......................................2-30
2-2-6. MECHANISM ADJUST Mode (A4).......................................2-34
2-3. OTHERS CHECK Mode (M3) .................................................................2-35
2-3-1. Outline......................................................................................2-35
2-3-2. MEMORY CHECK Display Menu (M35) ..............................2-36
http://getMANUAL.com

2BVW-55 P2
3. Replacement of Periodic Maintenance Parts
3-1. General Information on Parts Replacement and Alignment .......................3-1
3-1-1. Index...........................................................................................3-1
3-1-2. Precautions .................................................................................3-2
3-1-3. Threading End and Unthreading End States ..............................3-3
3-1-4. Oil and Grease ............................................................................3-6
3-1-5. Tightening Torque and Washer ..................................................3-7
3-1-6. Display Panel Cover Removal and Installation .........................3-8
3-1-7. Control Panel Removal and Installation ....................................3-9
3-1-8. Mechanical Deck Assembly Removal and Installation ...........3-10
3-2. Upper Drum Assembly Replacement........................................................3-14
3-3. Brush Replacement ...................................................................................3-19
3-4. Slip Ring Assembly Replacement.............................................................3-22
3-5. Drum Assembly Replacement...................................................................3-24
3-6. Video Head Cleaner Replacement ............................................................3-28
3-7. Pinch Roller Replacement .........................................................................3-31
3-8. Swing Gear Replacement ..........................................................................3-34
3-9. Tension Regulator Band Replacement ......................................................3-37
3-10. CTL Head Replacement ............................................................................3-40
3-11. Timing Belt Replacement .........................................................................3-43
3-12. S Main Brake Shoe Replacement..............................................................3-45
3-13. Capstan Motor Replacement .....................................................................3-48
3-14. S Reel Motor Replacement .......................................................................3-53
3-15. AT Head Replacement ..............................................................................3-55
4. Main Parts Replacement
4-1. Threading Motor Replacement ...................................................................4-1
4-2. Gear in Gear Box Replacement...................................................................4-5
4-3. Full Erase Head Replacement ...................................................................4-10
4-4. S Brake Solenoid Replacement .................................................................4-13
4-5. S/T Slider Replacement.............................................................................4-16
4-6. S/T Threading Gear Replacement .............................................................4-21
4-7. Reel Table Replacement ...........................................................................4-25
4-8. Tape Guide Replacement ..........................................................................4-29
4-9. Pinch Press Cam Replacement ..................................................................4-34
4-10. S Tension Regulator Arm Assembly Replacement...................................4-37
4-11. T Tension Regulator Arm Assembly Replacement ..................................4-39
4-12. T Idler Assembly Replacement .................................................................4-41
4-13. Cam Gear Assembly Replacement............................................................4-43
4-14. Intermittent Gear Replacement .................................................................4-48
4-15. Fan Motor Replacement ............................................................................4-50

3
BVW-55 P2
4-16. JOG/SHUTTLE Dial Replacement...........................................................4-52
4-17. LCD Monitor and Backlight Replacement ...............................................4-54
4-17-1. Backlight Replacement ............................................................4-54
4-17-2. LCD Monitor Replacement......................................................4-57
4-18. Board Replacement ...................................................................................4-60
4-18-1. SV-206 Board Replacement.....................................................4-60
4-18-2. RE-174 Board Replacement.....................................................4-62
4-18-3. SR-65 Board Replacement .......................................................4-63
4-18-4. DC-97 Board (DC IN connector) Replacement .......................4-65
4-18-5. HP-88 Board Replacement.......................................................4-66
4-18-6. PSW-63 Board Replacement....................................................4-67
4-18-7. DP-300 Board Replacement.....................................................4-68
4-18-8. DP-264 Board Replacement.....................................................4-69
5. Tape Path Alignment
5-1. General Information on Tape Path Adjustment ..........................................5-1
5-2. S Tension Regulator Offset/Gain Adjustment ............................................5-7
5-3. Back Tension Check and Adjustment .......................................................5-10
5-3-1. FWD Back Tension Check and Adjustment ............................5-10
5-3-2. REV Back Tension Check and Adjustment .............................5-12
5-4. Tape Running Check and Adjustment ......................................................5-14
5-5. Video Tracking Check and Adjustment....................................................5-20
5-6. CTL Head Height Check and Adjustment ................................................5-27
5-7. CTL Head Position Check and Adjustment ..............................................5-29
5-8. AT Head Position Check and Adjustment ................................................5-32
5-9. AT Head Height Check and Adjustment ..................................................5-34
5-10. AT Head Azimuth Check and Adjustment ...............................................5-37
5-11. AT Head Head-to-tape Contact Check .....................................................5-40
6. Electrical Alignment after Replacement of Periodic
Maintenance Parts
(Will be avaelable as a supplement.)
7. Electrical Alignment
(Will be avaelable as a supplement.)

5
BVW-55 P2
Manual Structure
Purpose of this manual This manual is the maintenance manual part 2 volume 1 of videocassette recorder
BVW-55.
This maintenance manual part 2 (Volume 1 and Volume 2) is intended for use by
trained system and service engineers, and provides the information that premises the
parts level service (parts replacement, guideline for adjustment, schematic diagrams,
board layouts, detailed parts list) .
This manual (volume 1) explains about parts replacement and guideline for adjust-
ment.
Related manuals Besides this “Maintenance manual part 2”, the following manuals are available for
videocassette recorder BVW-55.
..
..
.Operation Manual (supplied with the BVW-55)
This manual is necessary for application and operation of the BVW-55.
..
..
.Maintenance Manual Part 1
(supplied with the BVW-55)
This manual describes the setting and maintenance information.
..
..
.Protocol Manual of Remote (9-pin) Connector (available on request)
This manual explains the protocol for controlling the VTR via the RS-422A (9-pin
serial remote) . If this manual is required, please contact to Sony’s service organi-
zation.
..
..
.BKNW-225 Maintenance Manual (supplied with the BKNW-225)
This manual describes the spare parts list and the exploded view for the service
parts of the docking kit BKNW-225, that is used when the two BVWs are cou-
pled.

6BVW-55 P2
Contents This manual is organized by following sections.
Section 1 Service Overview
Explains the service information (the removal of PLCC IC, board extension, NV-
RAM, and so on) for this manual (volume 1).
Section 2 Maintenance Mode
Explains menus of the maintenance mode for adjustment.
Section 3 Replacement of Periodic Maintenance Parts
Explains the replacement of periodic maintenance parts and overview for replace-
ment of mechanical parts.
Section 4 Main Parts Replacement
Explains the replacement of mechanical parts (except periodic maintenance parts)
and circuit boards.
Section 5 Tape Path Alignment
Explains the tape path alignment after replacement of parts that are described in
Section 3 and Section 4.
Section 6 Electrical Alignment after Replacement of Periodic
Maintenance Parts
Explains the electrical alignment associated with replacement of parts that are
described in Section 3.
Section 7 Electrical Alignment
Explains the electrical alignment for the maintenance of this unit.
Section 1 Spare Parts
Describes the exploded views, the mechanical parts list and the electrical parts list.
Section 2 Semiconductor Pin Assignments
Describes the semiconductor pin assignments.
Section 3 Block Diagrams
Describes the block diagrams of overall and each board.
Section 4 Schematic Diagrams and Frame Wiring
Describes the frame wiring and the schematic diagrams.
Section 5 Board Layouts
Describes the board layouts of printed wiring boards.
Maintenance manual
part 2 volume 1
(9-967-828- )
Maintenance manual
part 2 volume 2
(9-967-829- )