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REPAIR HINTS (RECORDER)
The collectors supplied
by Concern Service must be
glued to the mounting plates (in the set delivered
by the factory, the collectors are riveted to the
mounting plates). Glue to be used: for example
4822 390 30014.
1. Azimuth
alignment
- Mount the recorder in the cabinet.
- Connect an electronic voitmeterto
1.
- Adjust for maximum output voltage by means of the
srew which can be reached through a hole in the
front, in the cassette compartment (Fig. 5).
-Do not use the recorder for the next hour.
2. Adjusting the head bracket 96, Figs. 1 and 2
3. Adjusting the bracket 507, Fig. 1
In position "fast forward winding" the tag of bracket 507
is pressed against bracket 105 so that idler
wheel
109 must come clear of wheel
102.
However in position "stop" this tag must be just
clear of the bracket.
Check: When
in position "stop" (without a cassette
in the machine),
the flywheel
is turned manually in
the normal
direction of rotation, the two catches 91
are taken along.
The catches 91 rotate in directions opposite to each
other; thus, they provide the required braking action.
4, Adjusting the flywheel
bracket 503, Fig. 3
5. Adjusting the force of the pressure roller 76, Fig. 4
When the pressure roller is just free of the capstan,
the pulling force must be 400...460 g. Adjust this
force by bending tag A.
6. Checking the winding friction coupling 81, Fig. 1
For this check the Cassette Torque Meter,
4822 395 30054 is used (Fig. 6)
- Insert the cassette torque meter into the recorder.
Set the recorder to position Playback,
- The Cassette Torque Meter should give the following
indications: Right-hand reel disc 30-60 g-cm
Left-hand reel disc 3-8 g-cm
The meter reading should be as constant as possible.
- If the aforementioned values are not measured,
the
chassis must be removed.
- Degrease the belts and running surfaces of the
flywheel, the idler wheels, the friction whee! and
the ree! discs.
- If the aforementioned values are still not measured,
the winding friction wheel must be replaced.
(See "Repair hints"),
Note:
The friction wheel may also be checked by a
measurement of the current taken from the external
power supply.
- Connect the recorder to an external power supply
of 9 V via a current meter.
- Set the recorder to position "Playback" and read the
amount of current taken from the power supply.
- Block the rotating reel disc and read the increase
in current.
This should be 10-12 mA.
6351769
7. When operated from mains voltage, the recorder
must be set (without cassette) to position "fast
forward winding" or "fast rewinding".
Block the rotating reel disc; then a current increase
of at least 120 mA must be measured, The manner
of measuring is identical to that described in para 6.
if the value of 120 mA is not reached, the running
surfaces of idler wheels and pulleys must be greased
with alcohol. If necessary, cord 54 must be replaced.
8. Checking the speed
The tape speed is measured with the Cassette Service
Set 4822 395 30052.
- Play back the 50-Hz side of the test cassette.
Compare the 50-Hz frequency of the test cassette
with the mains frequency,
3
- If the tape speed is too low, first check that the
pressure roller, the winding friction wheel, the
flywheel, etc. run smoothly.
- If necessary, readjust the speed with R842,
To this end, the lower cabinet should be removed.
Note:
7
The tape speed may also be checked with a test
cassette on which a 800-Hz signal has been modulated
at intervals of 4.76 m.
Code number of cassette: 8945 600 13501,
- Play back the test cassette. Measure the time between
two signals to be 98-102 seconds.
Lubricating instructions
Shell Alvania 2 4822 389 10001
Bal! tracks of balls 95 in chassis
506
Lubricant 10 (4822 390 10003)
Contact faces of brackets 110, 111 and 507
All purpose oil 4822 390 10048
Shaft of flywheel 66
Shafts 100 and 102 of turntables
Shaft of idler wheel 99
ND)
Vervangen
van de collector 92, fig. 1
De door Service geleverde collector dient op de
montageplaat te worden gelijmd in plaats van gefelsd,
welke methode door de fabriek wordt toegepast
(te gebruiken lijm b.v, 4822 390 30014),
REPARATIEWENKEN
(RECORDER)
1. Instelling van de azimuth
- Doe celluloselak (4822 389 20004) op de schroef
voor de azimuthinstelling, voordat de recorder wordt
ingekast.
- Monteer de recorder in de kast.
~ Leg een testkassette (6300 Hz) - 8945 600 13501
in
het apparaat.
- Sluit een elektronische voltmeter aan op punt
1
- Regel af op maximum
uitgangsspanning met behulp
van de schroef, die bereikbaar is door een gat in
het front, in de kassetteruimte (fig. 5).
- Gebruik het apparaat het eerste uur niet.
2. Instelling van de koppenbeugel
96, fig. 1 en2
3. Instelling van beugel 507, fig. 1
De lip van beuge! 507 drukt in de stand snel vooruit-
spoelen tegen beuge! 105 waardoor tussenwiel
109
moet vrijkomen van spoelwiel
102.
In de stand stop moet deze lip echter iets vrijkomen
van beuge! 105,
Instelling geschiedt door de lip te verbuigen.
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