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5 - 1
ADJUSTMENTS,
ENGLISH
L
Bang &Olufsen
ADJUSTMENT PROCEDURE
TUNER
TAPE RECORDER
Azimuth
See section 2 for component location drawing and test points, if necessary.
- Place PCB 2 in service position (see dismantling,
section 6). Adjustments on
PCB 1 Tuner are now accessible.
(See Tuner adjustment table)
In d ic a t io n s a re f o r th e l e f t ch a n n e l ( ri g h t c h a n n e l i n b r a c k e ts ) .
Wh e n u sin g a n a u d i o o sci l l a t o r w i th s i g n a l o u t p u t a t a l l f o u r p i n s o f t h e D I N
p lu g , t h e a u d i o o sci l l a t o r m us t b e d i sc o n n e c t e d d u ri n g r e c o r d i n g i n o r d e r t o
avoid fau lty measurements.
Test tapes used for adjustment:
A zim u t h
Wow
Torque
Level
CrO,
Fero,
6k3 Hz +1o/ollevel -20 dB
3 ,1 5 0 H z r0 .1 o / o l w o w : 0 . 0 8 %
S R K - C T 0 -1 0 0 g
333 Hz tlo/o/250 pWb t0.5 dB
ABEX TCC 2O3B
BASF R 723 DG
Part No. 6780036
Part No. 6780037
Part No. 6780046
Part No. 6780035
P a r t N o . 6 7 8 0 1 3 5
Part No. 6780067
'i r
- Load Azimuth tape, part No. 6780036.
- c o n n e ct th e tw o i n p u t s o f a n o sc i l l o s c o p e to 2 p 2 1 -5 ( L
o u r) a n d 2 p 2 1 -6 ( R
OUT) respectively from Tape pCB 7.
- Press TAPE, and adjust the screw A (side 1) until
the two curves on the
o s cill o sc o p e a re i n p h a se a t m a x i m u m a m p l i tu d e .
- Press TAPE for 1.5 secs., thereby obtaining the reverse
direction (side 2),
and adjust the screw B until the two curves on the oscilloscope are in
p h a s e a t m a xi m u m a m p l i t u d e .
- Repeat this procedure as a check.
T X 6
I X 6
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