Sony DVW-790WS/790WSP User Manual

4-24

DVW-790WS/709WS/707

DVW-790WSP/709WSP/707P P2V1

Video Head Cleaner Removal

Disconnection of the Brush Assembly Connector

Drum Assembly Removal

Cleaning of Contact Surfaces

Drum Assembly Installation

Connection of the Brush Assembly Connector

Video Head Cleaner Installation

Cleaning of Video Heads and Tape Running Surface

Tape Running Adjustment

Video Tracking Adjustment

CTL Head Height Adjustment

CTL Head Position Adjustment

CUE Head Height Adjustment

CUE/TC Head Position Adjustment

PG Phase Adjustment

Automatic Servo Adjustment

Video System Adjustment (Equalizer)

When replacing the drum assembly, take care not to damage the CTL head, CUE/TC head and the peripheral

tape guides.

Take care not to break the video heads of the drum assembly.

Apart from the periodic replacement, the drum assembly needs to be replaced in the following cases.
. If the drum assembly could not be used because the tape running surface of the upper or lower drum

scratched.

. If a correct RF waveform is not obtained after the tracking adjustment due to wear-out on the upper or

lower drum.

. If the specification of the VTR such as jitter or noise does not meet due to the short life of the bearing.

4-2. Parts Replacement