S/T Threading Gear Replacement - Sony BVW-55 Maintenance Manual

4-6. S/T Threading Gear Replacement

Outline
Replacement
VH cleaner assembly removal
Pinch arm assembly removal
Drum assembly removal
T tension regulator arm removal
Tension regulator band removal
S tension regulator arm removal
S and T catchers removal
Full top sensor removal
Threading link assembly removal
Slider removal
Threading gear assembly removal
Cleaning and oil applying
Threading gear assembly installation
Slider installation
Threading link assembly installation
S and T catchers installation
Full top sensor installation
Tension regulator band installation
T tension regulator arm installation
S tension regulator arm installation
Drum assembly installation
Pinch arm assembly installation
VH cleaner assembly installation
Adjustment after replacement
Tape running adjustment
Video tracking adjustment
CTL head position adjustment
AT head position adjustment
Precautions
. The four new stop washers and an E ring are required when replacing the S/T
threading gear.
E ring: 7-624-105-04 (2.3) x 1
3-559-408-11 x 4 (for S, T sliders, tension regulator band, and T
Stop washer:
tension arm)
. The two parallel pins (d = 2.0 mm) are required as tools for gear phase adjustment.
BVW-55 P2
4-6. S/T Threading Gear Replacement
4-21