Dual CC 8025 Serviceanleitung Seite 3

Tuning lnstructions for
CC 8025
Signal source Equipmenl
setting
Signal source settrng Connection
ol
measuring instrument
Item
lo
be tuned Tuning, Remarks
Azimuth Deckl+2
(lift off cassette slot cover)
Test casselte Dolby: OFF
Normal:ON
10
kHz AF voltmeler
tO
OUTPUT
Azimuth screw to
left
of
the
head
Use lacquer to fix
at maximum
Tape
speed Deckl +2
Note: Set Low Speed firsl
Test cassette Normal:ON
31
50 Hz Frequency counter
to
OUTPTJT
Deck
1
VR 702
Deck
2
VR 703
31
50
Hz
Deck
1
VR
701
Deck
2
VR 704
TP Hi-Speed to earth
4750 Hz
Playback level
Deckl +2
Test cassette
Dolby level
Normal:ON
Dolby: OFF
4OO Hz
AF voltmeter
IO
OUTPUT
Deck 1 VR
102
L+R
500 mV
Deck 2 VR
201
L+R
Hecording level Deck2
AF generator
tO
INPUT
LEFT/RIGHT
Dolby:OFF
Record: ON
Metal: ON
Metal tape
4OO Hz
approx. 80 mV
AF voltmeter
tO
OUTPUT
Record level control
maximu m
500 mV
VR 401 L+R 500 mV (during play)
RF
premagnetization
AF generator
IO
INPIJT
LEFT/RIGHT
Dolby: OFF
Record: ON
Metal tape
CROz tape
Fe
lape
'10
kHz
approx.80 mV
-20 dB
AF
voltmeter
to OUTPUT
Record level control
maximum
50 mV
VR 601 L+R
VR 603
VR 602
50 mV
45 mV
45 mV during play
Check the recording level again after setting the premagnetization.
lf
it
deviates (by more than
1
dB), repeat tuning, recording level and RF premagnetization-
RF
oscillator
Cassette Record:ON
Metal:ON
AF voltmeler
to CNT
60'1
L 601 approx.
'105
kHz
RF
trap
Cassette Record: ON
Metal:ON
AF vollmeter
to TP 6
L+R
L 602
L+R
Minimum
1
g-kHz
pilot-signal
lilter
AF generator
to INPUT
LEFT/RIGHT
Dolby: OFF
Record:ON
Fe tape
400
Hz
approx.80
mV
19kHz
AF
voltmeter
tO
OUTPUT
Record level control
maximum
500 mV
(at 400 kHz)
L
301 L+R
Minimum (at 19 kHz)
3
r-