Sony Professional U-matic SP BVU-950 User Manual

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VIDEOCASSETTE RECORDER
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MAINTENANCE MANUAL
Volume 1 1st Edition
serial No.10001 and Higher

Sony Professional U-matic SP BVU-950 Specifications

General

Video Format	U-matic SP
Tape Width	3/4 inch
Video Heads	2
Audio Channels	2
Editing Capability	Yes
Horizontal Resolution	300 lines
Audio Tracks	2
Signal System	NTSC/PAL
Signal-to-Noise Ratio	48 dB (video)
Inputs	Composite Video, Audio
Outputs	Composite Video, Audio
Power Supply	AC 100-240V

Summary

SECTION 1 INSTALLATION

1-1. OPERATIONAL ENVIRONMENT

Specifies recommended operational environment conditions to ensure unit performance and maintenance access.

1-2. INSTALLATION SPACE

Details physical dimensions and clearance requirements for unit installation and ventilation.

SECTION 2 TECHNICAL INFORMATION

2-1. SPECIFICATIONS

Lists the technical specifications of the BVU-950, including mechanical, electrical, and video parameters.

2-2. LOCATION OF MAIN PARTS

Identifies the location of key mechanical components and printed circuit boards within the unit.

2-3. PRINTED CIRCUIT BOARDS

Provides circuit information, detailing the function of each printed circuit board in the system.

SECTION 3 PERIODIC CHECK AND MAINTENANCE

3-1. SYSTEM CONTROL OPERATION CHECK

Outlines daily checks for system control functions like playback, rewind, and shuttle operations.

3-3. CLEANING PROCEDURE

Provides instructions for cleaning video heads, stationary heads, and tape path areas.

SECTION 4 SERVICE INFORMATION

4-1. REMOVAL AND INSTALLATION OF THE CABINET

Details the procedure for removing and installing the unit's outer casing and panels.

4-4. SERVICE OF THE SPECIAL PRINTED CIRCUIT BOARDS

Explains how to service specific printed circuit boards, including removal and replacement.

SECTION 5 REPLACEMENT OF MAJOR PARTS

5-1. REPLACEMENT OF THE UPPER DRUM ASSEMBLY

Step-by-step guide for replacing the upper drum assembly, including necessary tools and procedures.

5-5. REPLACEMENT OF THE HEAD

Instructions for replacing various heads, including audio/CTL, time code, and full erase heads.

SECTION 6 LINK AND DRIVE SYSTEM ALIGNMENT

6-1. REEL TABLE SYSTEM ADJUSTMENT

Covers adjustments related to the reel table system, including cassette holder and reel table height.

6-5. THREADING SYSTEM ADJUSTMENT

Details adjustments for the threading system, such as ring rotation and gear box installation.

SECTION 7 TORQUE SYSTEM ALIGNMENT

7-1. S BRAKE TORQUE ADJUSTMENT

Explains how to adjust the torque of the S brake using measurement tools and specific procedures.

SECTION 8 TAPE RUN ALIGNMENT

8-1. T CORRECTION GUIDE SLANTNESS ADJUSTMENT

Provides instructions for adjusting the slantness of the T correction guide for proper tape path alignment.

8-9. TRACKING ADJUSTMENT

Outlines the sequence of operations for performing tracking adjustments on the video system.

SECTION 9 POWER SUPPLY/SYSTEM CONTROL ALIGNMENT

9-1. DC VOLTAGE REGULATOR (UR-21) ADJUSTMENT

Details the procedure for adjusting DC voltage regulator outputs for proper system operation.

SECTION 10 SERVO SYSTEM ALIGNMENT

10-1. D/A AMPLITUDE ADJUSTMENT

Covers the adjustment of D/A amplitude for proper servo system operation.

10-4. DRUM FREE SPEED ADJUSTMENT

Explains how to adjust the drum's free speed for optimal servo performance.

SECTION 11 AUDIO SYSTEM ALIGNMENT

11-1. AUDIO REC LEVEL SETTING

Describes how to set the audio recording level for optimal input signal quality.

11-6. PB FREQUENCY RESPONSE ADJUSTMENT

Details the procedure for adjusting the playback frequency response of the audio system.

SECTION 12 VIDEO SYSTEM ALIGNMENT

12-1. PB RF FREQUENCY RESPONSE ADJUSTMENT (1)

Outlines the first part of the playback RF frequency response adjustment for the video system.

12-13. PHASE EQUALIZING TENTATIVE ADJUSTMENT (CONVENTIONAL MODE)

Describes the tentative phase equalizing adjustment for conventional video modes.

SECTION 13 TIME CODE SYSTEM ALIGNMENT AND OTHERS

13-1. TC PB LEVEL ADJUSTMENT

Explains how to adjust the time code playback level using specific test signals and equipment.

13-3. CHARACTER SIZE ADJUSTMENT

Covers the adjustment of character size for superimposed text on the video signal.