Akai AP-Q310 User manual

Neitz
QUARTZ FULL AUTO TURNTABLE
MODEL AP-Q310/C
This manual is applicable to both silver and pearl shadow panel models.
TABLE OF CONTENTS
SECTION 1 SERVICE MANUAL .....ccscsssesessseeneesssseetseetscseeeeee 3
SECTION 2 PARTS LIST............. Salebieted sates dbieassuaasavctectesese ieteesee 2D
SECTION 3 SCHEMATIC DIAGRAM ......cccsssesesseesetenetereetees 32

SAFETY INSTRUCTIONS
SAFETY CHECK AFTER SERVICING
Confirm the specified insulation resistance between power cord plug prongs and externally exposed parts of the set is
greater than 10 Mohms, but for equipment with external antenna terminals (tuner, receiver, etc.) and is intended for
or [A], specified insulation resistance should be more than 2.2 Mohms (ground terminals, microphone jacks,
headphone jacks. line-in-out jacks etc.)
PRECAUTIONS DURING SERVICING
1.
Parts identified by the A\ symbol parts are critical for safety.
Replace only with parts number specified.
In addition to safety, other parts and assemblies are specified for soa nniaes with such regulations as those
applying to spurious radiation. These must also be replaced only with specified replacements.
Examples: RF -converters, tuner units, antenna selector switches, RF cables, noise blocking capacitors, noise
blocking filters, etc.
Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
Use specified insulating materials for hazardous live parts. Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers (Insulating Barriers)
4) Insulation sheets for transistors
When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.), wrap
ends of wires securely about the terminals before soldering.
o> c>
Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.).
Check that replaced wires do not contact sharp edged or pointed parts.
Also check areas surrounding repaired locations.
Use care that foreign objects (screws, solder droplets, etc.) do not remain inside the set.

I.
I.
IV.
VI.
VIL.
Vil.
IX.
SECTION I
SERVICE MANUAL
TABLE OF CONTENTS
SPECIFICATIONS .......c.ccsccsssecssseccsssecessscssesecssaeeeseseeersessessnseeeeennees 4
DISMANTLING OF UNIT ........ccceceeesecssscecccnscnereceeseeessrsereeseeeeeenes 5
CONTROLS 6
PRINCIPAL PARTS LOCATION .,.....ccccssssssssssesssesssssseseeesecensenees 7
VOLTAGE AND CYCLE CONVERSION ........cssssssssccssrseceeseeeeeseces 8
1. VOLTAGE CONVERSION..........ceeceee obgastadetpindeassvistszacisceaneesee’ 8
2. CYCLE CONVERSION ..........:cccseescossssssescscerceenssesenseents seesesesenegens 8
ORDINARY ADJUSTRMENT ..........:ccsscccssssssreseccerssssreeeeessseneesens 9
1. STYLUS PRESSURE ADJUSTMENT ....ccssesssessecsssesssietsesenees rexede 9°
2. OVERHANG (Not necessary for AP-Q310/€)..... ci ceeiseesseniesceeeee 10°.
MECHANICAL ADJUSTMENT. ........cssccsscccscssscesesescsereesessensesenees 11
1. TONE ARM LIFTER ADJUSTMENT .....cccesssssessssstssssseesssssesssses 11
2. TONE ARM BRAKE ADJUSTMENT .0.....eeeccceescceseteeeettseeeneeees 12
3. -LEAD-IN/LEAD-OUT ADJUSTMENT 0.0... .cceeeeceeeesreeeeeeneeee 13
' 4, RETURN PLUNGER POSITION ADJUSTMENT... 13
ELECTRICAL ADJUSTMENT ...........cssccsssssssccctecccsssserecseteeseeeeee wee 14
1. OFF-SET VOLTAGE ADJUSTMENT (VR2, 3) AND
TORQUE DIFFERENCE ADJUSTMENT (VRI)...... eee 14
2. WOW AND FLUTTER CONFIRMATION .........ceesseseesseeeeeeee 14
CLASSIFICATION OF VARIOUS P.C BOARDS ..........cessssccesseess 15
1. P.C BOARD TITLES AND IDENTIFICATION NUMBERS...... [Se
2. COMPOSITION OF VARIOUS P.C BOARDS oe eeeeeceeeceeees 16
For basic adjustments, measuring methods, and operating principles, refer to
GENERAL TECHNICAL MANUAL.

I.
SPECIFICATIONS
SSS
es
ts,
TURNTABLE
Aluminum
alloy
die
cast
DRIVE
SYSTEM
&
MECHANISM
Quartz
Locked
Direct
Drive,
Fully
Automatic
MOTOR
DC
servo
motor
SPEED
33-1/3
rpm,
45
rpm
SPEED
DEVIATION
+0.002%
WOW
&
FLUTTER
0.045%
(DIN),
0.03%
(JIS)
RUMBLE
48
dB
(DIN
A),
73
dB
(DIN
B)
TONE
ARM
Static
Balanced
Type
EFFECTIVE
ARM
LENGTH
220
mm
STYLUS PRESSURE ADJUSTMENT RANGE
0 to 2.5 grams
APPLICABLE
CARTRIDGE
WEIGHT
3
to
8
grams
ARM
LIFTER
Oil
damped
OVERHANG
17.5
mm
OFFSET
ANGLE
24°
HORIZONTAL
TRACKING
ERROR
ANGLE
+2°40'
(Outside)
—1°
(Inside)
CARTRIDGE
VM
(Dual!
Magnet)
type
(Model
AP-Q310
does
not
include
cartridge.)
OPTIMAL
STYLUS
PRESSURE
2
grams
OUTPUT
VOLTAGE
5
mV
(DIN)
CHANNEL
SEPARATION
20
dB
FREQUENCY
RESPONSE
20
to
20,000
Hz
CARTRIDGE LOAD IMPEDANCE
STATIC VERTICAL COMPLIANCE
STATIC HORIZONTAL COMPLIANCE
47 kohms
16 x 10-® cm/dyne
12.5 x 10-6 cm/dyne
DYNAMIC
VERTICAL
COMPLIANCE
4.5 x 10-° cm/dyne
DYNAMIC
HORIZONTAL
COMPLIANCE
4.5 x 10° cm/dyne
POWER REQUIREMENTS
100V, 50/60 Hz for Japan
120V, 60 Hz for USA and Canada
220V, 50Hz for Europe except UK
240V, 50 Hz for UK and Australia
110-120V/220-240V,
50/60
Hz
switchable
for
other
countries
POWER CONSUMPTION
DIMENSIONS
6W
440 (W) x 98 (H) x 359 (D) mm
(17.3. x 3.9 x 14.1 inches)
WEIGHT
5.4 kg (11.9 Ibs)
*
For
improvement
purposes,
specifications
and
design
are
subject
to
change
without
notice.

Wag
il. DISMANTLING OF UNIT
PLATTER
In case of trouble, etc. necessitating dismantling, please
dismantle in the order shown in the photographs.
Reassemble in reverse order.
BOTTOM
COVER
DUST COVER—>
SCREWS
RUBBER MAT

1.
45
rom
ADAPTER
HOLDER
13.
2.
HINGE
14.
3.
PLATTER
15.
4.
RUBBER
MAT
16.
5.
GROOVE
FOR
OVERHANG
ADJUSTMENT
17.
6.
SPINDLE
18.
7.
TONE
ARM
LIFTER
19.
8.
TONE
ARM
LIFTER
HEIGHT
ADJUSTMENT
SCREW
20.
9.
MAIN
WEIGHT
21.
10.
STYLUS
PRESSURE
SCALE
RING
22.
11.
ANTISKATING
ADJUSTMENT
23.
12.
LEAD-IN/LEAD-OUT
ADJUSTMENT
SCREW
Fig. 1 Controls
TONE ARM REST AND CLAMP
TONE ARM
CARTRIDGE RE-SETTING SCREWS
HEAD SHELL
CARTRIDGE (AP-Q310/C ONLY)
CUEING
(CUE)
LEVER(
W
TOLIFT,
W
TOLOWER)
SIZE/MANUAL MODE SELECTOR
POWER/REPEAT SELECTOR
QUARTZ LOCK INDICATOR
CUT/RETURN SWITCH
SPEED SELECTOR
ope
Mie
ng
ee
eee
Se
SS
SS
SSS

ee
IV. PRINCIPAL PARTS LOCATION
INTERMEDIATE ARM RESET SW
PCB sw902
FUSE PCB
POWER TRANS
T90l
MOTOR DDM-6F
M901
QUARTZ SERVO
PCB
PUSH SW PCB
MANUAL SW POWER SW QUARTZ LOOK CUT/RETURN SW
Sw904 sw90! PCB Sw903
SPEED SELECTOR SW
Swi
Fig. 2 Principal Parts Location (Bottom View)

V.
VOLTAGE
AND
CYCLE
CONVERSION
Fig. 3 Voltage Conversion (U Model only)
1.
VOLTAGE
CONVERSION
2.
CYCLE
CONVERSION
Models
for
Japan,
Canada,
USA,
Europe,
UK
and
Aus-
With
DC
servo
motor,
cycle
conversion
is
not
necessary.
tralia
are
not
equipped
with
this
facility.
Each
unit
is
preset
at
the
factory
depending
on
its
destin-
ation,
but
some
units
can
be
converted
to
110-120V
or
to
220-240V
as
required.
If
voltage
change
is
necessary,
this
can
be
accomplished
as
follows:
1)
Disconnect
the
power
cord.
2) Remove
the
bottom
cover.
3) Remove
the
existing
Line
Voltage
Fuse
and
insert
the
required
Line
Voltage
Fuse
in
the
proper
fuse
holder
according
to
the
printed
instructions.

VI.
ORDINARY
ADJUSTMENT
1. STYLUS PRESSURE ADJUSTMENT (Refer to Fig. 4)
MAIN WEIGHT
STYLUS PRESSURE
SCALE RING
ncaa | mama A
| apart
Fig. 4 Stylus Pressure Adjustment