Pioneer DC-111Z Manual de serviço - Página 21
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12-2. ELECTRICAL
ADJUSTMENTS
Before
commencing
any
electrical
adjustments,
make
sure the following checked/completed.
1.
All mechanical adjustments must have been completed.
2.
The heads must be clean and demagnetized.
3.
OdB=1V during level measurements.
4.
Use the specified tapes for each adjustment. Although
test tapes have both A and B sides, only use side A
where the label is attached.
STD-331B:
Playback adjustment
STD-608A:
NORMAL
blank tape
STD-610:
METAL
blank tape
5.
Prepare
the following measuring
equipment.
AC
millivoltmeter, audio generator, attenuator, oscilloscope.
6.
Adjust both left and right channels unless otherwise
specified.
DC-1112/110Z
And unless indicated otherwise, leave the DOLBY
NR switch in the OFF position.
Let the set warm up for at least a few minutes before
commencing adjustments. And before commencing
the record/playback frequency response adjustment,
let the set 'age" for three to five minutes.
Always adjust the set in the given adjustments order.
If the order is changed, proper adjustment will not be
possible, and this may result in loss of performance.
Adjustment
Procedure
1.
2.
3.
4.
Head azimuth adjustment
Playback level adjustment
Recording/Playback frequency response
Recording level adjustment
OdB : 315Hz.
16Onwb/m
Fig. 12-4 Test tape STD-331B
33