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3-15. AT Head Replacement
Outline
Replacement
VH cleaner assembly removal
AT head assembly removal
AT head replacement
AT head assembly installation
VH cleaner assembly installation
Adjustment after replacement
Tape running adjustment
Video tracking adjustment
AT head height adjustment
AT head position adjustment
Electrical adjustment after replacing the AT head
Precautions
. Never tighten or loosen the zenith adjustment screw during the AT head replace-
ment
. The following new clamp is required when replacing the AT head.
Clamp: 3-847-356-02
Preparations
1. Put the unit into the unthreading end state.
2. Turn off the power.
3. Remove the upper frame.
(Refer to the maintenance manual Part 1, Section 1-6.)
4. Remove the cassette compartment.
(Refer to the maintenance manual Part 1, Section 1-7.)
Tools
. Torque screwdriver bit (for M1.4): J-6325-110-A
. Torque screwdriver bit (for M2):
. Torque screwdriver (for 3 kg):
. Cleaning cloth (15 cm x 15 cm):
. Cleaning liquid:
BVW-55 P2
J-6325-380-A
J-6325-400-A
3-184-527-01
9-919-573-01
3-15. AT Head Replacement
Zenith adjustment screw
AT head assembly
3-55
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