Akai AP-005 User manual

SERVICE MANUAL
PARTS LIST

AUTOMATIC-TURNTABLE
move. AP-005
SECTION
1
SERVICE
MANUAL............--
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1
SECTION
2
PARTS
LIST
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22.20.02
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SECTION 1
SERVICE MANUAL
TABLE OF CONTENTS
2 ARS
TECHNICAL DATA .. 2.1... oc ee eens
DISMANTLING OF UNIT... 0.0.6. ee ce ee
ARRANGEMENT OF PRINCIPAL PARTS. ...............
AUTOMATIC MECHANISM ADJUSTMENT...............
1. LEAD-IN POSITION ADJUSTMENT..................
2. LEAD-OUT POSITION ADJUSTMENT ................
<< PLAYER CARE ..
CYCLE CHANGE (MOTOR PULLEY REPLACEMENT) ......
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3. LUBRICATION
VII. BLOCK DIAGRAM
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1. TECHNICAL DATA
1. TURNTABLE SECTION
TURNTABLE
300
mm
aluminium
alloy
die-cast
turntable
DRIVE SYSTEM Belt drive
MOTORS
(2)
One
4-pole
hysteresis
synchronous
motor
for
turntable
drive
and
a
geared
motor
for
tone arm
drive
SPEED 33-1/3 and 45 rpm
WOW & FLUTTER
SIGNAL TO NOISE RATIO
WEIGHT
0.05% WRMS
Better than 52 dB
1.1 k grams
2. TONE ARM SECTION
TONE
ARM
Static
balanced
type
stainless
steel
tubular
arm
with
inside
force
canceler
and
lateral
balance
weight
ARM
LENGTH
220
mm
STYLUS PRESSURE ADJUSTMENT RANGE
APPLICABLE CARTRIDGE WEIGHT
ARM LIFTER
OVERHANG
SHELL WEIGHT
0 to 3 grams
4 to 8 grams (8 to 12.5 grams using sub-weight)
Oil damped
15 mm
13.5 grams
3. CARTRIDGE SECTION
CARTRIDGE
VM
(dual
magnet
type)
Audio
Technica
model
AT-11
with
0.7
mil
spherical
diamond
stylus.
é
FREQUENCY RESPONSE 15 to 25,000 Hz
OUTPUT VOLTAGE 4 mV (1,000 Hz 50 mm/sec)
CHANNEL SEPARATION 20 dB (1,000 Hz)
OPTIMUM STYLUS PRESSURE 2 grams
REQUIRED LOAD IMPEDANCE 47 to 100 k ohms
WEIGHT 5.5 grams
4. GENERAL SPECIFICATIONS
POWER REQUIREMENTS
CSA Models ..........:c0cees0e- 120V, 60 Hz
CEE Models ..........:.c00000064 220V, 50 Hz
Other Models .............-..008 110 to 120V/220 to 240V, 50/60 Hz (Switchable)
DIMENSIONS 440(W) x 128(H) x 358(D) mm
(17.4" x 50” x 14.1")
WEIGHT 7.6 kg (16.7 Ibs.)
NOTE: For improvement purposes, specifications and design are subject to change without notice.

ll. DISMANTLING OF UNIT
In case of trouble, etc. necessitating disassembly, please
disassemble in the order shown in photographs. Reas-
semble in reverse order.
ADJUSTMENT
BOTTOM COVER
TABLE SHEET
LOOSEN THESE SCREWS SLIGHTLY
TURN TABLE
ADJUSTMENT

lil!
ARRANGEMENT
OF
PRINCIPAL
PARTS
PROXIMITY SWITCH
CK UP PLATE ASSY
TIMING MOTOR
POWER
TRANSFORMER
VOLT SELECTOR
MICRO SWITCH
MOTOR PULLEY
BELT GUIDE
POWER TRANSFORMER
PHASE CAPACITOR
220V op iov
240V i20v
SUPPLY PC BOARD
HYSTERESIS
SYNCHRONOUS MOTOR
AC-4
MAIN WEIGHT
LATERAL WEIGHT
INSIDE FORCE
CANCELLER
PICK UP STAND
PICK UP ARM
HEAD SHELL

IV. AUTOMATIC MECHNISM ADJUSTMENT
Fig. 1
HOLE IN PANEL
(FOR ADJUSTMENT)
Fig. 2

1. LEAD IN POSITION ADJUSTMENT
Remove the rubber plug which is located on panel
toward the rear part of the pick-up arm. When the
pick-up arm is moved from the position shown in
Fig. 1 toward the position shown in Fig. 2 adjustment
screw (B) becomes accessible through the hole from
which the rubber plug has been removed as the
lead-out position is approched. When adjustment
screw (B) is turned clockwise, lead-in is adjusted
further inward and when turned counter-clockwise,
further outward.
Therefore, adjust lead-in position as follows:
For adjusting toward inner circumference turn
clockwise.
For adjusting toward outer circumference turn
counter-clockwise.
NOTE: 1. When the adjustment screw is turned one
revolution, the position of the pick-up
arm stylus is changed by about 2 mm.
2. When using the standard accessory car-
tridge, adjust so that on a 30 cm record,
lead-in takes place between 298 and
293, on a 25cm record, lead-in takes
place between 247 and 242¢, and on a
17 cm record, lead-in takes place between
173 and 168¢.
(These diameters are measured with
Center Spindle as center position.)
3. After adjustment, be sure to re-install
rubber plug.
2. LEAD OUT POSITION
Remove the rubber plug which is located on panel
toward the rear part of the pick-up arm. Stationary
the pick-up arm (on arm rest) as shown in Fig. 1.
At this position, adjustment screw (A) becomes
accessible through the hole from which the rubber
has been removed. When adjustment screw (A) is
turned clockwise, lead-out will be sooner and when
turned counter-clockwise, lead-out will be delayed.
Therefore, adjust lead-in position as follows:
For adjusting toward outer circumference turn
clockwise.
For adjusting toward inner circumference turn
counter-clockwise.
NOTE: 1. When the adjustment screw is turned one
revolution, the position of the pick-up
arm stylus is changed by about 2 mm.
2. When using the standard accessory car-
tridge, adjust so that on a 30 cm or 25 cm
record, operation begins between 115¢
and 109¢@, and on a 17 cm record, opera-
tion begins between 106¢ and 98@.
(These diameters are measured with
Center Spindle and Center Position.)
3. After adjustment, be sure to re-install
rubber plug.

V. CYCLE CHANGE (MOTOR PULLEY REPLACEMENT)
MOTOR PULLEY BELT GUIDE
ALIGN
SET SPEED SELECTOR
i
©
33
RPM
POSITION
GROOVE
Fig. 3
50 Hz and 60 Hz cycle change is effected by changing
the motor pulley.
50 Hz and 60 Hz differentiation can be determined by
the groove on the 60 Hz pulley.
While viewing horizontally as shown in Fig. 3, install so
that the lower part of the motor pulley brim and the
lower part of the belt guide are lined up.
Set speed selector to 33 rpm position, install the belt
and switch on power. If a rumbling noise from the belt
can be heard and speed changing is not smooth, adjust
installation position of motor pulley.

Vi. PLAYER CARE
ATS-Il
1 LIFE OF STYLUS
The lifetime of stylus is about 500 hrs. of use (about
1000 30cm LP records.) If the stylus becomes old,
because the record will be damaged and tone quality
will become inferior, be sure to replace as soon as is
needed. If records on which dust is allowed to
accumulate are played, the stylus will wear especially
fast and the record surface will be scratched. There-
fore, please be sure to keep record clean by wiping
and cleaning the record grooves with water soaked
gauze. Also if dust adheres to the turntable sheet
(rubber mat), as this will cause the record to become
dirty easily, the mat should also be kept clean.
-. STYLUS CHANGE
When replacing stylus, be sure that the stylus
(ATS-11) is inserted properly in the direction of the
arrow mark shown in Fig. 4 and fits into cartridge
firmly. Use only model ATS-11 stylus which is for
use in model AT-11 cartridge.
Fig. 5
3. LUBRICATION
Because for rotating parts and parts which rub
together during operation, oilless metal and the best
grease or oil is used, your machine will not need
lubrication for some time. About once per year, use
standard accessory player oil and apply one or two
drops to the motor shaft as shown in Fig. 5. In case
you do not have player oil, use #60 spindle oil or a
high grade machine oil. If used continually for
business purposes, etc., oil about once or twice per
month.
CAUTION: Following lubrication, because oil will
adhere to the drive belt and pulley and
to the turntable etc., wipe the oil off of
these parts with a cloth to which a little
carbon tetrachloride or thinner (benzine
can be also be used) has been applied.