Akai AAR 22 L 32 L 42 Service Manual

Page 2

ABBREVIATIONS FOR SERVICE MANUAL
MODEL AA-R22/L, AA-R32/L, AA-R42

ABBREVIATION EXPLANATION
A-SW Analogue SWitch
CK ClocK
C-MOS Complementary Metal Oxide Semi-conductor
CPU Central Processor Unit
fL Local oscillator Frequency divided by PLL factor
FLD Fluorescent Display
fR Reference Frequency divided by PLL factor
GND GrouND
H High (referring to voltages)
INT INTerrupt (terminal)
L Left
L Low ( referring to voltages)
LD Lock out Detection terminal
LPF Low Pass Filter
LSB Least Significant Bit
MSB Most Significant Bit
NC Not Connected
PIN Programmable counter leut terminal
PLL Phase Lock Loop
Pour Programmable counter OUTput terminal
R Right
ST STrobe
SW SW itch
SEG SEGment
VCO Voltage Controlled Oscillator
Xl' Crystal controlled connection Terminal

Page 3

AA-R32/L

STEREO RECEIVER

MODEL AA-R22 / L
MODEL AA'RBZ/L
MODEL AA'R42

THIS MANUAL IS APPLICABLE TO BOTH SILVER
AND PEARL SHADOW PANEL MODELS

SECTION 1 CIRCUIT OPERATION DESCRIPTION

SECTION 2 MODEL AA-R22/L SERVICE MANUAL ........... 33
SECTION 3 MODEL AA-R32/L, AA-R42 SERVICE MANUAL. . . . 47
SECTION 4 PARTS LIST .................................. 75

SECTION 5 SCHEMATIC DIAGRAM ........................ 98

Page 40

III. CONTROLS

36

_._.__x_._...
mmghwm-Ip

SEPTFP"?.°N.

POWER SWITCH

ACOUSTIC MEMORY BUTTONS
DEFEAT BUTTON

BASS AND TREBLE CONTROL
BALANCE CONTROL

TUNING MODE SELECTOR

FL DISPLAY

PHONO BUTTON

BAND SELECTOR

AUX BUTTON

. SPEAKER SELECTOR
. FM MODE SELECTOR
. PHONES JACK

FR ES ET STATION BUTTON

. TUNING [UP/DOWN) BUTTON
. FADER BUTTON

17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.

SERVICE MANUAL AAR22/L

Fig. 2-1 Controls

VOLUME (UP/DOWN) BUTTON

TAPE 1 BUTTON

TAPE 2 BUTTON

AM STEP SELECTOR (No! on some models)
RESET BUTTON

FM DE-EMPHASIS SELECTOR (Not on some models)
ANTENNA TERMINALS

AM LOOP ANTENNA

GROUND TERMINAL

PHONO JACKS

AUX JACKS

TAPE 1 REC/PLAY JACKS

TAPE 2 REC/PLAY JACKS

A AND B SPEAKER SYSTEM TERMINALS
AC OUTLETS (Not on some models
POWEH CORD

Page 59

V. CONVERSION

VOLTAGE
SE LECTOR

a m

.3.

our

AM STEP
M DE-EMPHASIS

l. VOLTAGE CONVERSION

Models for Canada, USA and Australia are not
equipped with this facility. Each machine is preset
at the factory according to destination, but some
machines can be set to 110V, 120V, 220V or 240V
as required.

Fig. 36 Rear View

If your machines voltage can be converted:

1) Disconnect the power cord from the power supply.

2) Turn the VOLTAGE SELECTOR located on the
rear panel with a screwdriver until the correct
voltage is indicated.

VOLTAGE SELECTOR

2. FM DE-EMPHASIS SELECTOR
(NOT ON SOME MODELS.)

Use this selector to de-emphasize an FM signal
encoded with Dolby NR by an amount (50 us or 75
I15) equal to the emphasis made at the broadcasting
station.

Set this selector accordng to your area.

4-D

FM
OE-EMPHASIS

DE

50ys 75p:

Fig. 3»8

SERVICE MANUAL AA-RlZ/L. AA

Fig. 3-7

3. AM STEP SELECTOR

(NOT ON SOME MODELS.)

The Akai AA-R32/42 can scan the AM frequencies in
steps of 9 kHz or 10 kHz. Set this selector according
to the broadcasting frequencies in your area. After
setting the AM STEP selector, turn on the Akai
AA-R32/42 and then depress the RESET button.

H

AM STEP

CE

9K IOK

Fig. 3-9

55