Tape; Repair Tips; Lubrication; Replacement Of Cd Drive Mechanism - Bang & Olufsen Type 2651 Service Manual

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Bang &Olufsen
5 - 6
REPAIR TIP5, ENGLISH
eir
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REPAIR TIPS
Lubrication
Replacement of CD drive
mechanism
TAPE
Wow frequencies
TEST FUNCTIONS
T h e n e e d fo r su b se q u e n t l u b ri c a t i o n i s m i n i m a l . I n c o n n e c t i o n wi t h m a j o r
checks and replacement of mechanical parts it may be necessary to apply a
little lubricant (see exploded view, section 4).
The optical pick-up is extremely sensitive to static electricity. The work site
must therefore be protected against static electricity. Careless treatment of
the optical pick-up may reduce its life dramatically.
The CD drive mechanism and PCB 8 must be connected when the product is
connected to a mains outlet.
- Loosen the two transport screws A for CD.
Remove the CD front frame (see dismantling, section 6, if necessary).
Remove the CD cover plate by loosening the four pins (marked with
arrows).
M a ke a d e p th a d j u s tm e n t b y b e n d i n g t h e s p r i n g - l o a d e d fi t ti n g .
Make the lateral centring by adjusting the two springs laterally on the
sp r i n g -l o a d e d f i t t in g .
W O W F R E Q U E N C IE S
Frequency
Foult source
Pos. no.
1 . 7 H z
1 . 7 H z
4 . 1 H z
6 .0 H z
7 . 6 H z
29.6 Hz
Pinch roller, left
P i n ch r o l l e r, r i g h t
D r i v i n g b e l t
Flywheel left
Flywheel right
Motor (capstan)
9407
9411
9455
9438
9451
9453
BeoSound Century can be brought into TEST MODE, thereby providing the
fol lowi ng possi bi lities:
D isp l a y o f t u n e r va r i a n t .
Gearbox test.
Keyboard test.
LED test.
Display of software version.
Presetting of EEPROM 31C4.
Continuous operation of tape recorder.
Speaker sound level adjustment.
CD test.