Kenwood KT 9X Service Manual
This is the 20 pages manual for Kenwood KT 9X Service Manual.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.
Extracted text from Kenwood KT 9X Service Manual (Ocr-read)
Page 1
)IfiVIC: EIAI'IUAI.
QUARTZ SYNTHESIZER STEREO TUNER
Panel assy" Front glass MexaHic cabine Cover
(A20-) (310-0319-03) (AO1-0422~02) (F07-0427-O4)
Knob Knob Cap
(K27-0683-04) (K290480013) (BOB-001804]
AM loop antenna Terminal board Slide switch Bushing
(T90-O122-05} (5200228705) (531-2056705) (J42-0083-05)
Slxde switch
(531)
Coaxiai connector Phono jack Foot Power cord'
(EO4«0006-05) (E13-0217-05) (J02-0118-04] (E30-)
Refer to Parts List on page 7
Page 2
NOTES/REMARIIUES
Notes on Replacement of Ceramic Filters and Vari-cap
Diodes
Ceramic filters used in the KT-9X, 9X6, SXL are classified
into three groups according to their center frequencies. Each
set is equipped with one of these three types of filters.
Be sure to replace all four ceramic filters (CF1~CF4)
together using a filter kit which includes four filters with the
same center frequency when they need to be replaced.
The center frequency of each ceramic filter is identified by
the color in the upper corner. Confirm that all the four filters
are of the same color after replacement.
Adequate performance will not be provided if the IF center
frequency does not match the ceramic filter center frequency.
The IF center frequency must be changed to match the
ceramic filter center frequency if the center frequency of the
ceramic filters removed is not the same as that of the new
filters. Change the IF center frequency by adding (or remov-
ingl D33 and/or D34 to PC board X13 in the combinations
shown in the table.
The ceramic filters used in this model are specially
selected, and those used in other models cannot be used. The
vari-cap diodes (KVi 226) for the AM band must be replaced
in pairs when one of them needs to be replaced.
Remarques sur le remplacement des filtres céramiques et
diodes é capacité variable
Les filtres ceramiques quutilise le KT-QX, QXG, 9XL sont
classes en trois groupes selon leurs fréquences nominales.
Cheque appareil est équipe de Iun de ces trois types de filtre.
Veiller a remplacer en meme temps les quatre filtres céra-
miques lCFl a CF4) en utilisant un leu de filtres qui comporte
quatre filtres ayant la meme fréquence nominale.
La frequence nominale de cheque filtre ceramique est
identifiee par la couleur de son angle supérieur. S'assurer
apres remplacement que les angles des quatre filtres sont
tous de la meme couleur.
Les performances adequates ne peuvent étre obtenues si
la fréquence nominale intermédiaire IF ne correspond pas a la
fréquence nominale du filtre céramique. La frequence lF doit
étre modifiée pour correspondre a la fréquence nominale des
filtres céramiques si celle des filtres enleves est différente de
celle des nouveaux filtres. Modifier la fréquence nominale
intermediaire IF en ajoutant lou en enlevantl D33 et/ou D34
a la plaquette de circuits X13 en 5e référant aux combinai<
sons mentionnées dans le tableau.
Les filtres ceramiques quutilise ce modéle sont choisis
spécialement et ne peuvent étre remplacés par ceux quutilie
sent les autres modeles.
Les diodes a capacite variable (KV1226l pour la modula-
tion damplitude (AM) doiventetre remplacées par paires lors-
que lune delles doit étre remplacée.
IF fangsncv Caragllzrfllter D33 D34 Frefigergzfizrnter. Corgéarargiixuferltre D33 D34
10.700 Red Not used Not used 10,700 Rouge Non utilise Non utilise
10.725 Orange Not used Used 10,725 Orange Non utilise Non utilise
10.750 White Used Used 10,750 Blanc Utilisé Utilisé
Color for identifying center frequency
CF23 CF1.4
Couleur d'identification
de la fréquence nominate
Bleu
CF2,3 CF1.4
Page 7
KI-flll/llli/lll
fl ADJUSTMENT
INPUT OUTPUT TUNER ALIGNMENT I
"0' EM SETTINGS SETTINGS SETTINGS POINTS AUG" F0 6'
lBl > i
Mll'lll'l'lum crosstalk.
1 00.1 MHz - ,
STEREO A compromise adjustment
11 5233330" ngltggr-Azf'gt'zfid" (E) 100.1 MHz 323 (I?) may be required if left-torright I
Pilot: : 6.75kHz dav WIDE and right»to-Ieft separations -
60dB-(ANT inputl are new" 1
IOOIB'IIMHZ STEREO A Minimum crogstalk.
compromise a lustment
12 sfilfiggm" TKHsZefgcifffét'zfidev (El 1001 MHz va4 may be required if Iefmo-rigm n
Pilot. * 6.75kHz dev NARROW and right-to-left separations l
SOdB (ANT input] are unequal.
AM SECTION Keep the AM loop antenna installed.
(D)
MW
BAND EDGE Connect a DC l
m (MW) (1) - voltmeter to 1510 kHz U 7 21-0 V
terminal 4. (1602 kHZ)
BAND EDGE c (D) DC W I
onnect a
2 lLW) l1) - voltmeter to 350 kHz L20 21-0 V
terminal 4. "
i (C) Maximum amplitude and f
O (3) "F afifimlim 630 kHz (E) 233qu L15 symmetry of the i
400 Hz, 30% mod 1 oscilloscope display. y
(0 Maximum amplitude and
(4) RF mwggfm 7440 kHz (E) 1 44MC)"/kH CT6 symmetry of the I
400 Hz, 30% mod 2 oscilloscope display. 1;
1(3) Maximum amplitude and _ l
(5) RF Ltflwumzm 170m 5 17%sz L1 5 symmetry of the
400Hz, 30% mod oscIlloscope display. j
(Cl Maximum amplitude and
l6) RF [(AflfillllélgENT 320 kHz (El 32LOWH CT7 symmetry of the y
400 Hz, 30% mod Z ' oscilloscope display. I
Repeat alignments l3)~i6) several times.
lCl lJ) Tun: tlgsavariable resistor until .I
t e voltmeter reading 1
(7) ATESIEEP 400 329033)? Mod Connect a DC 990 kHz VR7 changes from the LOW level i
40 dB (ANT input) voltmeter to T.P. to the HIGH level (from the H
HlGH level to the LOW level). i