Drive MechanismGV 900�, GV 940�
� Turn the cassette compartment drive gear (Pos. 38, Fig. 4) to its left
4. Notes on Assembling the Drive Mechanism
stop position.
4.1Top of the Drive Mechanism� Move the pinch roller drive lever (Pos. 11) and the slider (Pos. 27)
� Fit the reverse drive lever (Pos. 20, Fig. 22).in the direction of the arrows (Fig. 26) to their stop positions.
� Insert the reverse guide spring (Pos. 29, Fig. 29).� Insert and turn the master cam (Pos. 37) clockwise so that the big
� Fit the reverse guide lever (Pos. 19) as shown in Fig. 23 and set ittooth engages with the big space of the cassette compartment drive
with the height adjustment nut (Pos. 214) to 13.38mm (Fig. 24).gear (Pos. 38, Fig. 26).
� Check the drive mechanism in "tape unthreaded" mode: the semi-� Secure the master cam (Pos. 37) with the securing ring (Pos. 208)
circular groove of the pinch roller drive lever (Pos. 11) must be above(Fig. 26).
the groove of the mechanism chassis (Fig. 23). If necessary, adjust� Insert the slow brake (Pos. 21), the clutch lever (Pos. 23) and the
the drive mechanism in this mode, e.g. by turning the loading motorlimiter pulley (Pos. 48) (Fig. 2).
driver (Pos. 47, Fig. 4) by means of a screwdriver.� Secure the limiter pulley (Pos. 48) with the securing ring (Pos. 216).
� Insert the pinch roller cam wheel (Pos. 41, Fig. 23) so that its� Put on the reel belt (Pos. 34).
semicircular cutout is above the round recess of the pinch roller cam� Install the reel brakes (Pos. 24 / 25).
wheel E (Pos. 11)
� Secure the pinch roller cam wheel (Pos. 41) with the securing ring208
(Pos. 216, Fig. 22)).
� Insert the pinch roller unit so that the cutout of the plastic lever (Pos.37
18) engages with the guide of the pinch roller cam wheel (Pos. 41)
(Fig. 16).
a
� Check the tape path (point 5.8).
Fig. 26
22
38
1211
214b27
31
19
29
20
5.Adjustments
18
2165.1Adjusting the Brake Band
Fig. 22
41� Dismantle the cassette compartment (point 3.1) and observe the
notes on operating the drive mechanism without cassette compart-
ment (point 3.1.1).
� Play back Cassette E180 from the start of the tape in Standard Play
mode.
� Adjust the tension pole adjuster (Pos. 50) so that the tension arm
(Pos. 15) just reaches the mark on the mechanism chassis (Fig. 27).
Tape
E 41
15
19
13.38mm
11
englisch Y English Y anglais
Fig. 23Fig. 24Fig. 2750
4.2Bottom of the Drive Mechanism
33
� Preparation: Turn the reel brakes (Pos. 24 / 25) in the direction of the
arrows (Fig. 18) until it is possible to remove them and do so.
� Move the levers and gearwheels to their stop positions as shown by
the arrows in Fig. 25.
5.2Adjusting the Tape Tension
� Put the slider (Pos. 27) on to the shafts X Y Z as shown in Fig. 25.
� Dismantle the cassette compartment (point 3.1) and observe the
notes on operating the drive mechanism without cassette compart-
ment (point 3.1.1).
� Play back the torque cassette meter in Standard Play mode.
� By changing the hook-on position of the tension spring (Pos. 33, Fig.
27
27) set the brake force of the supply reel to 3.6�5.2mNm
(36.5�52gcm).
5.3Adjusting the Reel Torque in Rewind Mode
� Dismantle the cassette compartment (point 3.1) and observe the
notes on operating the drive mechanism without cassette compart-
ment (point 3.1.1).
� Put the torque meter with adapter on to the supply or take-up reel and
set it to 0.
� Press button à for checking the take-up reel or button i for
Fig. 25
checking the supply reel. When the pinch roller starts to turn, turn the
reel which does not rotate until the drive mechanism automatically
moves the pinch roller away from the capstan.
b� When carrying out this measurement, turn the torque meter in the
reel's sense of rotation (one turn every 2-3 seconds).
a
X YZ
k 5 - 12GRUNDIG Service |
ACEC
GRUNDIG
