Sony PS-2250 - Tonearm Base Removal; Tonearm Lifter Replacement; Bias Cord Stringing Procedure

2-13.
The tonearm base can be removed by turning
the tonearm height adjustment ring counter-
_ clockwise while holding the base.
When reassembling the base, care should be taken
that the lock lever meets with the slot on the
tonearm shaft as shown in Fig. 2-13.
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Fig. 2-13. Tonearm reinstallation
TONEARM LIFTER REPLACEMENT
Remove the tonearm assembly as described in
Procedure 2-11.
Remove the screw (© F 1.7 x 3) securing the
lifting tab to the top of the lifter piston as
shown in Fig. 2-14.
Loosen the screw (© F 2.6 x 8) securing the
lifter to the lifter base as shown in Fig. 2-14,
and then depress the lifter gently. This frees
the lifter.
Fig. 2-14. Tonearm lifter replacement
4, Install the replacement lifter.
5. After replacing the lifter, adjust the cueing-
height so that the clearance between the stylus
tip and the turntable becomes 7 mm (9/32) to
9 mm (23/64') when the cueing lever is set to
the “‘up”’ position.
2-14. BIAS CORD STRINGING
In case the bias cord string breaks, it must be —
replaced with a new bias cord assembly.
(Part. No. X-20850-07-0)
Tools required:
1. Thin copper wire, 0.2 mm diameter
2. . Razor blade
3% Contact cement
Procedure:
1. Remove the contact cement on the plastic ring
and anti-skate cantilever.
2. Thread the thin copper wire through the
opening of the anti-skating compensator ring
as shown in Fig. 2-15, and then hook it to one
end of the new bias cord assembly. .
3. Gently pull the copper wire. This completes
the bias-cord threading.
4. Hook the doubled end of the cord to the tab
on: the anti-skating compensator ring and the
anti-skate cantilever, and then apply a drop of
contact cement to it.
copper wire (0.2 mm dia.)
Fig. 2-15. Bias cord stringing