Akai ATV 04 Service Manual

Page 2

l . TECHNICAL DATA

FM TUNER SECTION

FREQUENCY RANGE

CAPTURE RATIO

"3'75 MI-Izto 108 MHz

,,,1,9uV,
71.2dB

SELECTIVITY

More than 65 dB

IMAGE REJECTION

More than 60 dB (98 MHZ)

IF REJECTION

More than 85 dB (98 MHZ)

SPURI0U§7REJE7C7TION 77 7M70Ie thfl1785 dBL9787MHz) 77 77777777 7
AM SUPPRESSION 60 dB 77
SIGNAL TO NOISE RATIO 7 73 dB 7 7 777 7
HARMONIC DISTORTION

MONO Less than 0 .09% (100% modulation)

STEREO 7 7 7 Less7 than 0. 713% (100%71-7ngt7iu1ation)777 77
STEREO7S7E717ARATION 77 More than7572 dB (1 kHz)77 77
SUB7 CARRIER SUPPRESSIQN More tha7n7 760 dB 777 777 7 777
OUEPUT VOEEGE 77771737er I V (100%7m0dulat7170n)77 77777 777 77
ANTENNA INPUT IMPEDANCE 300 ohms i,balanced

75 ohms unbalanced
AM7 TUNER SECTION 77 7 7 7 77 77 777
FREQUENCY RANGE 520 kHz to 1,605 km 7 7 77 77
SENSITIVITY (IHF) 150 uV/m (bar antenna)
10 11V (e7xternal antenna) 77
SELECTIVITY (II-IF)77 777777 M7o7re than 730 7dB 77 77777 7 7 77
IMAUEREJECTION 77 More 7t7han 55 dB (1 19070713112) 7 7 77
IF REJECTION ' 77 More 77than759 dB 77 7777 77 77 777 7
SIGNAL TO NOISE RATIO 77 7 More than 55 dB 7
OUTPUT VOLTAGE i 77 7 7 3007 (IN (30477 modulation)
ANTENNA I BuiMin ferriteibar antflia 7 77 77
POWER REQUIREMENTS A 120 V,760 HZ for USA and Canada
220 V, 50 Hz for Europe except UK
240 V, 50 HZ for UK and Australia
110 V/220 V/240 V, 50/60 HZ internally switchable for
777 77 7 Other cogtries. 7777 777 77 777 7 77
DIMENSIONS 440 (W) x 78 (H) x 340 (D) mm
77 7 (177773x3. 1 x13 .4)inc7hes 77
WEIGHT" 7 4 9 kg
7 77 7 7777 (10 81bs)777 77 7 7 77777 77 7 777
EQLNER CQNSUMIUON I 20 w ,,

- * For improvement purposes, specifications and design are subject tO change without notice.

Page 5

1. FM SECTION ADJUSTMENT (Refer to Figs. 5, 6 and 7)

Result

DStep Adjustmentltemw Adjustment Point Remarks
Front End T1 Maximum noise EAND :0 FM and MODE to
i 1 . . MONO . Detune from broadcast
IF Cod Front End r level . .
. and receive noise only.
l V 7'77'7 7"" '
Tuning Indicator Center indication .
2 Centering T3-a of tuning LEDs 98 MHz, 60 dB (mono) input.
mifik, , , , 7,, . ,77,7,, WW ,
3 Distortion T3-b Distortion Factor: 98MHZ, 60 dB (mono) input.
Factor less than 0.09 % Minimize distortion factor.
Confirmation of If tuning indicator is not cen-
4 Tuning Indicator . . tered, readjust Steps 2 and 3
Centering l described above.
l 98MHZ, 60 dB (mono) input.
1 98.00 MHz Ground. TP2 on FL P.C. Board
5 FL Dis la VRI Tune b en term and adjust VRl so that display
Fre 6:10), 1 FLD P.C.B (A) LED and, fn'nimufi shows 98.00 MHZ and 4th numeral
q y 3 ATV-4008 . . 1 display must be stable. After
. distortion factor. . ,
; completion, remove grounding.
. . 108.2 MHz, 60 dB (mono) input,
6 H13? Kluge T TCO MMlmmung.°:tPt_t Turn TUNING KNOB fully clock-
In dlSP Fin Front End lmmlgéml: or ion wise. Display to 108.20 MHz by
a 1 ' adjusting TCO.
C°nfirmm°n l l WWWP. 88 MHz, 60 dB (mono) input.
of Low Range Minimum distortion .
7 i l Confirm whether display show 88.0
1 may i facw Ml-I7 Error 250 kHz
r Indication 88.0 i .25 MHZ " '
8 High Range TCR, TCA Distortion Factor: 108 MHz, 6 dB or less (mono)
Sensitivity Front End less than 3 % input.
1 Confirmation Distortion Factor: B8 MHz, 6 dB or less (mono)
9 of Low Range less than 3 (7 input.
Sensitivity " Refer to NOTES 2 and 3.
l 10 M t be 1 VR1 30 kB No signal emitted MODE to STEREO.
mg 6 ATK-ZOOIA from OUTPUT 98 MHz, 22 dB (mono) input.
l PLL IC Free Frequency Counter to Test Point,
11 Running 1,1131: 21801;}: 76.00 kHz Detuned condition.
; Frequency I Refer to NOTES 4 and 5.
1,,
Confirmation of .
i2 STEREO indicator Must be lighted ifohgztfgsfifigg?) Input
I Lighting
3 l . . VR3 100 kB 98 MHZ, 60 dB (stereo) input.
13 P11332381 L6 1 Minimum output SSG modulated by only pilot
ATK-ZOOIA 3 signal, 19 kHz.

ll

Page 24

_ g _
_ w _ _
w
a a RMA...
EAE
W?
O
;\G Um
fir}: .1pr
2
Lm 2.
0mm MA m -
OM
E
mm
mm? m As
4
W
.3 m
m m I
_
_
_
_
_
_
m
u
_
_
_ -
_
_
_
_
_
u u
a n
_ .
_ .
_ _
_ _
_ _
_ _
_ _ I.
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
a. _
w, _
2 u
a _
F, _
v, _ 1
n, _
NV _
E_ _
m. _
0- _
a. _