Bang & Olufsen BeoLab 3500 MKII 1601, Руководство по обслуживанию

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2.2 Adjustments
Replacement of PCB36, Microcomputer
The bass and treble levels of the speakers are stored electronically in the
Microcomputer (PCB36). When replacing PCB36, the original bass and treble level
values must be restored:
- Install the new Microcomputer (see section 4, Disassembly, if necessary).
- In TEST MODE 0, enter the values printed on the label in the socket well:
LT (left treble) : X LB (left bass) : X
RT (right treble) : X RB (right bass) : X
- Press STORE STORE when all four speakers have been encoded as desired.
Replacement of a speaker unit
A rated value in dB is printed on the back of the new speaker unit. This value is
used for adjusting the sound level, which is done in TEST MODE 0:
- Note the value on the back of the new speaker unit
- Replace the old speaker unit.
- Execute the point TEST MODE 0.
- The rated value printed on the back of the speaker may be either positive or
negative:
Positive:
If the rated value printed on the back of the speaker is positive, the unit in
question must be damped by X number of steps. Press
>> to select speaker, if
necessary (the active speaker is flashing), and enter a new digit (see table).
Negative:
If the rated value printed on the back of the speaker is negative, the other three
units must be damped by X number of steps. Press
>>
to select the three speakers
in question, and enter new digits (see table).
Rated value in dB X steps down
0.00
+/-0.25 0 steps down
+/-0.50
+/-0.75
+/-.00
+/-.25 step down
+/-.50
+/-.75
+/-2.00 2 steps down
- Press STORE when all four speakers have the desired encoding.
- Abandon test mode by pressing
STOP
.