Teac A-3440 - Tape Speed Measurement

7-6 MAGNETIC RESISTANCE ELEMENT
(STOP SENSER ASS’Y) POSITION ADJ.
1, Adjust Screws for a gap between Magnet and Magnetic
Resistance Element of approx. 1 mm.
2. Check that there is no delay when changing from F.F.
(or REW) mode to Play mode.
Location; on right side when viewed from the rear.
MAGNETIC Pos BRAKE DRUM
RESISTANCE
ELEMENT MAGNET
STOP SENSOR
/ PCB ASS’Y
Approx. | mm
Fig. 7-5 Magnetic Resistance Element Position Adj. Locations
7-7 LEFT TENSION ARM ADJ.
1. Place the deck in the Play mode.
2. Adjust the “ground terminal” (B) screw for uniform
movement of the Tension Arm.
3. Adjust the ‘‘ground terminal” (A) so that when the ten-
sion arm is in the rest position, there is no gap between
the “stopper” the side of the circular cut-out in which
it sits. In other words, the lug should be adjusted so that
the spring supplies just sufficient tension to hold the
“‘stopper” against the side of the hole in the top panel.
The “stopper” is the right-angled flange with a rubber
Sleeve labeled I in the illustration for section 4-3 (page
7).
14
78 TAPE SPEED MEASUREMENT
The tape speed should be measured using TEAC flutter free
tape, Type YTT-2003 (7% ips) and YTT-2004 (15 ips).
These contain a highly accurate 3000 Hz tone.
Connect a digital frequency counter to either line OUTPUT
jack. The indicated frequency should be as follow.
3000 Hz +30 Hz
Within 15 Hz, or less
Tape Speed Deviation
Using PITCH CONT
2820 Hz to 2550 Hz
Max. (+) | 3180 Hz to 3450 a
NOTE: Tape Speed Measurement: PITCH CONT should
be in OFF position. If necessary, adjust tape speed
on the Capstan Servo P.C.B.
See Fig. 7-7 below.
for HIGH speed for LOW speed
Fig. 7-7 Tape Speeds Adj. Location
Ground Terminal (A)
Adjust for no gap
Ground Terminal (B)
Stopper
+S
=
SS
= T-1282
Fig. 7-6 Left Tension Arm Adj.