Akai AT-K11/L User manual

AT-K11/L
AT-K22/L
AM-U11
AM-U22
FM
AM
STEREO
TUNER
AT-K11/L
move.
AT-K22/L
STEREO
INTEGRATED
AMPLIFIER
AM-UI11
wopeEL AM-U22
THIS
MANUAL
IS
APPLICABLE
TO
BOTH
SILVER
AND
BLACK
PANEL
MODELS
SECTION
1
MODEL
AT-K11/L
and
AT-K22/L
SERVICE
MANUAL
............
3
SECTION
2.
MODEL
AM-U11
and
AM-U22
SERVICEMANUAL...............
27
SECTION
3
PARTS
LIST
SECTION
4
SCHEMATIC
DIAGRAM

» ®
») ®
SECTION 1
SERVICE MANUAL
MODEL AT-K11/L, AT-K22/L
TABLE OF CONTENTS
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PD AMODE TANT R20 ire} i Sseics ass g Me ale eae a ae’s, hodet Mae 8 Sch tien Sel oe aes ben Ps Sua 5
Il. DISMANTLING OF UNIT ........0....0 00. cc cece cece eee ceeeeeeeneeeeunesrnees 6
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Di MODE AT R816 5.3 2 J 2 irs ah Bah ach alobt stead yl acd are ae unten: dduee a Reese here 9
IV. PRINCIPALPARTS LOCATION ............ 0000. c cece cece cece eueeeeeueeeenes 10
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V. VOLTAGECONVERSION ............0 ccc cece ce eeceeeeeeueeuues Oecd Ghee cig cadens 12
VI. TUNER ADJUSTMENTS .........0.00.. 00000. c cece ccc cece cece eeeeeuneeeannteunes 13
1. FMSECTION ADJUSTMENTS ............ 0.0 cee cc eee cece ec ueeeeueveeeunees 16
2. AM(AT-K11 Land AT-K22 L:MW) SECTION ADJUSTMENTS ...........0..00cceeeueee 18
3. LW SECTION ADJUSTMENTS a4 is0.08 a 0% s deel os bos ba nea a ees Hob saw Eee 19
VII.
TUNING
CORD
THREADING
....
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cc
ccc
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cee
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euueeenunenues
20
{Pee (0) 8) 5) 2. be RR ee mR a ee 20
p19) 5) 21 DY 2.921 | Ce a ee asa as 20
VIII. CLASSIFICATION OF VARIOUS P.C BOARDS ............- ccc cece cece ceeesueeueees 1
1. P.C. BOARD TITLES AND IDENTIFICATION NUMBERS ........ 022.000 cceeeeceeeaes 21
2. COMPOSITION OF VARIOUS P.C BOARDS ......... 00.0. cece eee c ee eesueeeeuees oy)
For basic adjustments, measuring methods, and operating principles, refer to GENERAL TECHNICAL
MANUAL. ,

I. TECHNICAL DATA
1. MODEL AT-K11/L
FM TUNER SECTION
TUNING FREQUENCY RANGE | 87.5 MHz to 108.0 MHz
USABLE SENSITIVITY
(IHF) (300 ohms) 19 pV
CAPTURE RATIO 13 4B
SELECTIVITY (IHF) (400 kHz) 60 dB
IMAGE REJECTION 55 dB
IF REJECTION 85 dB
SPURIOUS REJECTION 85 dB
AM SUPPRESSION 60 dB
SUB CARRIER SUPPRESSION 60 dB
S/N (MONO/STEREO) 70 dB/65 dB
T.HD. (MONO/STEREO) 0.1%/0.15%
STEREO SEPARATION (1 kHz) 45 dB
MUTING LEVEL (INPUT LEVEL) 22 4B
AM
TUNER
SECTION
(MW
FOR
AT-K11L)
a
TUNING
FREQUENCY
RANGE
525
kHz
to
1,605
kHz
@)
USABLE SENSITIVITY (IHF)
BAR ANTENNA 100 uV/m
EXTERNAL ANTENNA 10 pV
SELECTIVITY (IHF) 30 dB
IMAGE REJECTION 48 dB
IF REJECTION 33 dB
S/N 50 dB
T.HD. 0.3%
LW TUNER SECTION (AT-K11L ONLY
TUNING FREQUENCY RANGE 135 kHz to 350 kHz
USABLE SENSITIVITY (IHF)
BAR ANTENNA 200 pV/m
EXTERNAL ANTENNA 17 pV
SELECTIVITY (IHF) 30 dB
IMAGE REJECTION
IF REJECTION
S/N
THD.
¢
OUTPUT SECTION
OUTPUT LEVEL FM(100% MOD.) 775 mV
_ AM(30% MOD.) 250 mV
OUTPUT IMPEDANCE 3.3 kohms
POWER REQUIREMENTS 120 V, 60 Hz for U.S.A. 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 othex
countries.
DIMENSIONS 440(W) x 78(H) x 333(D) mm
(173 x 3.1 x 13.1 inches)
WEIGHT 4.6 kg (10.1 Ibs)
* For improvement purposes, specifications and design are subject to change without notice.

)®
Re
,
2. MODEL AT-K22/L
FM TUNER SECTION
TUNING
FREQUENCY
RANGE
87.5
MHz
to
108.0
MHz
USABLE SENSITIVITY
(IHF) (300 ohms) 1.9 uV
CAPTURE RATIO 1.3 dB
SELECTIVITY (IHF) (400 kHz) 65 dB
_ IMAGE REJECTION 56 dB
IF REJECTION 90 dB
SPURIOUS REJECTION 85 dB
AM SUPPRESSION 60 dB
SUB CARRIER SUPPRESSION 60 dB
S/N
(MONO/STEREO)
73
dB/65
dB
T.H.D.
(MONO/STEREO)
0.1%/0.15%
STEREO SEPARATION (1 kHz) 45 dB
MUTING LEVEL (INPUT LEVEL) 22 dB
AM TUNER SECTION (MW FOR AT-K22L)
TUNING FREQUENCY RANGE
525 kHz to 1,605 kHz
USABLE SENSITIVITY (IHF) (BAR)
100 uV/m
SELECTIVITY (IHF)
30 dB
IMAGE REJECTION
48 dB
IF REJECTION
LW TUNER SECTION (AT-K22L ONLY)
33 dB
TUNING
FREQUENCY
RANGE
135
kHz
to
350
kHz
USABLE
SENSITIVITY
(IHF)
BAR
ANTENNA
200
pV/m
EXTERNAL
ANTENNA
17
pV
SELECTIVITY
(IHF
30
dB
IMAGE
REJECTION
45
dB
IF
REJECTION
33
dB
S/N 50 dB
T.H.D.
0.3%
OUTPUT SECTION
OUTPUT
LEVEL
FM(100%
MOD.)
775
mV
AM(30% MOD.) 250 mV
OUTPUT
IMPEDANCE
3.3
kohms
POWER
REQUIREMENTS
120
V,
60
Hz
for
U.S.A.
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
other
-
countries.
DIMENSIONS
440(W)
x
78(H)
x
290(D)
mm
(17.3
x 3.1.x
114
inches)
WEIGHT
4.5
kg
(99
lbs)
*
For
improvement
purposes,
specifications
and
design
are
subject
to
change
without
notice.

|.
DISMANTLING
OF
UNIT
1. MODEL AT-K11/L
In
case
of
trouble,
etc.
necessitating
dismantling,
please
dismantle
in
the
order
shown
in
the
photographs.
Reassemble
in
reverse
order.
SCREWS
FRONT PANEL
UPPER COVER 4

nnn
2. MODEL AT-K22/L
In case of trouble, etc. necessitating dismantling, please
dismantle in the order shown in the photographs.
Reassemble in reverse order.
SCREWS c q
b ¢ SCREWS
a SCREWS b FRONT PANEL ¢
UPPER COVER a

CONTROLS
1. MODEL AT-K11/L
=
w&
oN ans
GERIAL NUMBER a
3 $1280-%2577 f;
perenne Ce
‘SROLK HATARD--0G NOT OPEN?
HASOUE DE CRRC— NE PAS ERLEVER!
‘RERUMRONESCEFANR~WICHT GFFREN!
POWER SWITCH
FM DIAL SCALE (AT-K11)
LW AND MW DIAL SCALE (AT-K11L)
AM DIAL SCALE (AT-K11)
FM DIAL SCALE (AT-K11L)
FM MODE SELECTOR
FREQUENCY INDICATOR
SIGNAL
STRENGTH
INDICATOR
FM
TUNING
INDICATOR
FM STEREO INDICATOR
10.
11.
12.
13.
14.
15.
16.
ac
110-240¥
50/60Hz
1OW
AKAL ELECTRIC CO, LID.
a
§
tide of indicated
verve ih
MADE IN JAPAN rv 69 k
Fig. 1 Controls (AT-K1 1/L)
FM SWITCH (AT-K11)
FM/AM BANK SELECTOR (AT-K11L)
AM SWITCH (AT-K11)
MW/LW BAND SELECTOR (AT-K11L)
TUNING KNOB
FM AND AM ANTENNA TERMINALS
AM ANTENNA (ANT) SELECTOR (AT-K11 L ONLY)
AM FERRITE BAR ANTENNA
OUTPUT JACKS (RIGHT AND LEFT}
AC CORD (CEE, SAA AND UK: AC INLET)

2. MODEL AT-K22/L
FMAM TM UNO mee OT me
110-2007 FE
50/60H:
TOW
‘SHOCK GAZARD—G6 RET OPER?
pia
arte
e
tat
ca
ata
abet
AKAl
ELECTRIC
CO. LID
RERSARUNGSSETAR—
WICRT
OFFEH!
moog.
NO.
AT-K22
ore.
a
peees
MADE IN JABAN Shop for necessary.co sion
Fig. 2 Controls (AT-K22/L)
1.
POWER
SWITCH
8.
AM
SWITCH
(AT-K22)
2.
FM
MODE
SWITCH
MW/LW
BAND
SELECTOR
(AT-K22L)
3.
DIGITAL
LED
DISPLAY
9.
TUNING
KNOB
4.
SIGNAL
STRENGTH
INDICATOR
10.
FM
AND
AM
ANTENNA
TERMINALS
5.
FM
TUNING
INDICATOR
11.
AM
ANTENNA
(ANT)
SELECTOR
(AT-K22L
ON
LY)
6.
FM
STEREO
INDICATOR
12.
AM
FERRITE
BAR
ANTENNA
7.
FM
SWITCH
(AT-K22}
13.
OUTPUT
JACKS
(RIGHT
AND
LEFT)
AM/FM
BAND
SELECTOR
(AT-K22L)
14.
AC
CORD
(CEE,
SAA
AND
UK:
AC
INLET)

at gg
=
een a tn en
IV.
PRINCIPAL
PARTS
LOCATION
a
1.MODEL
AT-K11/L
STEREO
INDICATOR Di
DIAL
POINTER
TUNING
o1,0
INDICATOR
02
TUNING
SHAFT
POWER
SWITCH
SIGNAL
STRENGTH
BAND
SELECTOR
sw90l
INDICATOR
03
FM
MODE
SELECTOR
LED
PCB
ATKZ-I6B(U/T)
swil
ATKZ-47B(AAL
,CSA)
ATKZ-48BI(CEE,UK,SAA)
Fig. 3 Front View
POWER
TRANSFORMER
AM
BAR
ANTENNA
ANSOI
FRONT
END
ul
T9OI
AT-KIIT
FF
I26uI2
POWER
SWITCH
TUNER
PCB
ATKZ-
I6A(U/T)
ba
Sw90!
ATKZ-47A(AAL,CSA)
ATKZ
-48A
(CEE
,UK,SAA)
Fig. 4 Top View
I

;
: 2. MODEL AT-K22/L
TUNING INDICATOR
d2
POWER SWITCH
swsg0l
SIGNAL STRENGTH
STEREO INDICATOR
INDICATOR D3 Dl
TUNING SHAFT
;
H
}
digi
FM MODE SELECTOR DIGITAL LED
swi DISPLAY INI
BAND SELECTOR
®
,
Fig.
5
Front
View
POWER
TRANSFORMER
AM
BAR
ANTENNA
ANSOI
FRONT
END
;
T9O0I
AT-K200T
FFI3Z6UI2
POWER
SWITCH
TUNER
PCB
LED
PCB
COUNTER
PCB
Sw90!
ATKZ-I6A(U/T)
ATKZ
-I6B(U/T)
ATKZ-I7
ATKZ
47A(AAL,CSA)
ATKZ-47B(AAL,CSA)
ATKZ-48A(CEE,UK,SAA)
ATKZ
-48B(CEE
,UK,SAA)
Fig. 6 Top View
1]