Thorens td 224 service manual

Page 2

THUhENS S.A.
bte-Croix/VD TD 224 No 1
Switzerland

Service Manual
for
Thorens Model TDb224 Transcription Turntable and Record Changer

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1.1. Pick-up height

Normal adjustment: This adjustment may be checked when the turn-
table is "off" in the normal last record stOp position:

- lift the turntable platter rubber cover slightly from the rim
(see Fig. 4).

- bring the pick-up near the edge of the platter with the needle
tip outside,

- verify that the lower end of the lateral abutment of the plug-in
head is from 1/32" to 1/16" (1 and 2 mm) above the platter sur-
face (Distance h),

- check that the stylus is protruding between 3/32" and 7/32"
(2 and 5 mm) out of the shell. (See "Cartridge installation" in-
structions on page 13 and 14 of Instruction Manual).

New adjustment: turn screw PU 1007 (see Fig. 5);

- clockwise to increase pick-up height

- counterclockwise to decrease pick-up height

Notice. When the pick-up is playing a record, normal distance be-

tween the head of screw PU 1007 and abutment PU 1021 is about 1/8"

(3 mm) and the arm lifting ear PU 942 should be approximately in
the middle.

1.2. Pick-up lift

Symptom: Failure of pick-up arm to lift out of rest position during
automatic operation.

Normal adjustment: The tone arm should be lifted by about 1/16"
(1 mm) above the arm rest post.

§§E§§.EPL.LE Improper adjustment of pick-up height

Remedy. See 1.1. above

gagsg_flp;_§5 Clearance between arm lifting lever CB 1065 (see
Fig. 6) and extremity D of lifting spindle PU 1019 is excessive

when the unit is in the normal stop position.

Normal clearance: For units with serial number above 1500
this clearance, as checked with a wedge 0, should be 1/16" (1.3 +