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DEMOUNTING
Cabinet Fig. 6
—
Remove the 6 screws in the backplate (do not loosen
the black aerial screw) and loosen the aerial wire.
—
After removing the knobs (456, 476) and 2 screws the
printed panel can be raised to the lower side and can
be tilted (Pay attention to the wiring and the frame
454 near the socket unit).
—
After removing 2 screws the tape transport can be
tilted.
For removing the flap of the cassette compartment
(item 461), first open the flap and then slightly press
lugs in cassette flap inwards.
It is only possible to remove handgrip (item 450) after
the back part of the cabinet has been removed.
Turn handgrip to the back. Then slightly bend both
sides of handgrip outwards and the handgrip will be
released.
Tape deck, Fig. 8
Remove pressure roller 68
Remove plug 67, compression spring 69 and torsion
spring 508.
Removing the head support bracket 52
Remove tension spring 54
Remove pressure roller 68
By pushing the head support bracket slightly backwards
it can be removed.
Remark: Mind the 2 balls 58, they now lie loose.
Removing the buttons 59,60,62,63,64,121, Fig. 8
Remove pressure roller 68.
Remove head support bracket 52
Remove locking bracket 53
By pressing the locking tag of the relevant button slightly
inwards this button is released and can be pushed from
the chassis.
When doing this, mind pressure spring 61.
Removing switch SK8Q2 (171)
This switch consists of 2 separate flat springs, directly
fitted in the chassis.
Unsolder the two connecting wires and properly clean
the soldering spots on the switch.
Remove circlip 87 so that reel disc 92 can be pushed
upwards.
Remove tever 509 and unfasten the connection between
brackets 91 and 93.
Unbend the locking tags of switch springs 111.
From the upper side the springs can be removed from the
chassis.
ADJUSTMENTS AND CHECKS
Height of the recording/playback head K1, Fig. 8
—
Switch off the supply voltage.
— Slide adjusting jig 4822 402 60245 over the capstan
while pressure roller 68 is slightly pulled back.
CS 77 242
—
The jig must be slid over the capstan to an extent that
it is in line with the erase head guides.
—
The R/P-head must now be so adjusted that the jig
slides exactly between the tape guides of the two heads.
Azimuth adjustment recording/playback head K1, Fig. 8
The azimuth is adjustable with socket screw 71.
For alignment, the 8 kHz section of cassette SBC 133
(4822 397 30039) can be used.
If necessary, re-adjust volume control so that the output
voltage is well readable.
In start position the 8 kHz signal must be adjusted for
maximum output voltage at BU3/103.
Fast-wind friction 92
The friction force can be measured with the friction
measurement cassette 4822 395 30054 (811/CTM) in
position "'start''.
452
The measuring value must be:
|
_—
Fast-wind side 40-60 gcm. Permissible variation in
153
between these values 10 gcm.
—
Rewind-side 4-6 gcm.
454
—
The friction force is determined by the sloping up sides
and the flat springs, Figs. 8A and B.
456
—
The force is adjustable by catching the flat spring
behind another stud.
457
Tape speed
L58
With wow-and-flutter meter
—
Connect the set to a wow-and-flutter meter (BU3/103).
—
Set in position ''playback'' with the 3150 Hz section of
cassette SBC 133.
—
The speed is adjustable with R409.
Maximum permissible deviation + 2 %.
—
Besides, the wow-and-flutter value can be read with
this meter. It may be 0.35 % maximum.
With cassette service set 801/CSS
459
—
Connect the apparatus to the cassette service set, via
BU6.
Use the 50 Hz-side from the cassette service set.
Set in start position.
—
With R409 adjust for minimum wow-and-flutter of
the test indicator.
Checking the lace-up and the capstan adjustment
—
Recorder in the position ''playback'' with the mirror
461
cassette inserted.
~
When the tape at the capstan moves upwards or
downwards, adjust the capstan to be perpendicular by
means of B on the flywheel pivot bearing (84, Fig. 8).
—
The tape should be straight and smooth between the
tape guides and along the capstan.
Small deviations from this pattern are permissible,
because they do not have an effect for normal cassettes.
Sass
450
4822 498 40461
4822 443 60794 D8312/18
Adjusting the flywheel play
451
4822 410 30232
4822 443 60785
~ The flywheel play should be noticeable, but may not
452
4822 349 50129
4822 466 70441
exceed 0.3 mm.
453
5322 358 34017
463
4822 267 40392
i
Adjust by turning A (83, Fig. 8).
454
4822 464 70231
464
4822 411 50509
456
4822 413 40963
466
4822 413 40881
471
4822 526 10182 D8312
477
4822 492 51354
4
457
4822 492 61974
A467
4822 492 62247
472
4822 528 10367
478
4822 492 62233
4
458
4822 462 71146
468
4822 529 10152
473
4822 528 10368
479
4822 492 51231
4
459
4822 443 60788 D8310
| 469
4822 492 62213
474
4822 443 60782
481
4822 443 60783
| 4
459
4822 443 60784 D8312
| 471
4822 526 10139 D8310
476
4822 413 51117
482
4822 403 51425
4
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