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Sony MEGA BASS CFD-073 Service Manual page 12

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Head Azimuth Adjustment
Adjustment Procedure:
l.
FWD playback mode
test tape
P-4.4a63
(6.3 kHz, -lO
dB)
oscilloscope
Turn the scrcw and confirm the output peak
point. Whsn L-CI{ end R-CH peaks do not
match, adjust the screw to the point where the
within
2dB
within
2 d B
L.CH
pcak
R.CH
peak
.---r Ecrew angte
Oscillo:copr rcsurgc wovef orm
@@@so
in phaEe
f
9d
OK
.r3f - r 80"
NG
3.
Change to REV mode and repeat steps I aûd 2.
Adiustment Locetion:
PHONES
RADIO SECTION
FUNCTION switch: RADIO
tAMl
BAND SELECT switch: AM
3æ6 anplitude modr lation
by 4(M Hz signal
ou@ut level: as low as possible
tFMl
BAND SELECT switch: FM
F,lt aF ssc
225 kHz frequency deviation
by 4(n Hz signal
ou@ut level: as low as possible
. Rcpcâl thc procedure3 in cach sdjustmcnt
several timcs, and thc frcqucncy coveragc and
tracking rdjustments should bc finally donc by
thè trimmcr capacitors.
AiT' FF SSG
PHONES
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
T I
520 kHz
cTl-4
I,6E0 kHz
AM TRACKING AÀ'USTMENT
Adjust for a maximum reading on VTVM.
I . J
62A kHz
CTI-3
1,400 KHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L2
US, Canadian. E: 86.5 MHz
AEP, UK:
E7.0 MHz
West Germany: 87.35 MHz
cTt-2
US, Canadian, E: 109.5 MHz
AEP, UK:
108.3 MHz
West Germany: 107.8 MHz
FM TRACKING AOJUSTMENT
Adjust for a maximum reading on VTVM.
L I
US, Canadian, E: 86.5 MHz
AEP, UK;
87.0 MHz
West Germany: 87.35 MHz
cTl- I
US, Canadian, E: 109.5 MHz
AEP, UK:
108.3 MHz
West Germany: 107.8 MHz
- 1 2 -

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