Akai ATV 04 Service Manual

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 MM‘lmmung.°:’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

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