Lyrec TR532 Series, Manual

Page: 48 / 195

7. ADJUSTMENTS
TAPE DECK MECHANICAL ADJUSTMENTS
7.1
REEL PLATFORM HEIGHT, drawing No. 7.01
Insert a long 3 mm Allen key in the hole at the top of the hub and
turn clockwise to lower the platform, and anti-clockwise to raise it.
For lubrication, see section 8.12.
7.2
SUPPLY TENSION ARM PRESSURE, drawing No. 7.02A
Disconnect the damping cylinder from the tension arm by pressing down
slightly on the end of the damping cylinder piston arm so that it
comes free from the pin which drives it.
Adjust the set screw at the end of the long spring, so that the tape
tension measured in front of the playback head, when running in the
normal PLAY MODE, is 225 p +/- 10 %. Check the servo arm tension as
follows: Remove the screw and the cover of the tension arm roller,
replace the screw and tie a spring balance to it with a short length
of string. With the damping system disconnected measure the tension in
the direction indicated in the drawing and check that it falls between
275 and 325 p.
7.3
TAKE-UP TENSION ARM PRESSURE, drawing No. 7.02B
Disconnect the damping system. Adjust the set screw at the end of the
long spring with the tape moving in PLAY MODE so that the tape tension
measured after the CAPSTAN PINCH ROLLER is 225 p +/- 10 %. Check the
tension arm pressure as follows: Remove the screw and cover of the
tension arm roller. Replace the screw and tie a spring balance to it
with a short length of string. With the damping system disconnected,
check that the tension in the direction indicated in the drawing lies
between 275 and 325 p.
7.4
CAPSTAN PINCH ROLLER PRESSURE ADJUSTMENT, drawings No. 7.03A
and 7.03C
Remove the screw and the cover of the CAPSTAN PINCH ROLLER. Replace
the screw and tie a spring balance to the screw with a length of
string. With no tape loaded, press the start button. Pull back on the
spring balance in the direction indicated in the drawing till the
CAPSTAN PINCH ROLLER begins to lose contact with the capstan. At this
point read the tension on the spring balance scale. See drawing No.
7.03C. Loosen lock-nut (A) and screw the shaft (B) in the direction
indicated by the arrow to decrease the CAPSTAN PINCH ROLLER pressure
or in the opposite direction in order to increase it. When a pressure
of 2 kp +/- 20 % is obtained tighten lock-nut (A) Be careful not to
misalign the link-system at(D) which should-be horizontal and parallel
to the TAPE DECK.
1978-07-01 TR532 7.4