Aiwa AP D50 Service Manual

Page 1

FULL AUTOMATIC DIRECT DRIVE
TURNTABLE SYSTEM

MODEL mo.AP-D50E,K,G

r.

Al WA®

(SERVICE MANUAL)

Code No. 0750000036

DATE OF ISSUE 6/1980

Type:

SPECIFICATIONS

Full automatic direct drive turntable
system

Tone arm section
Type:

Static-balanced type

Semiconductors: 2 lC's, 1 PET, 50 tranSistors, 36 Effective arm length: 215 mm

diodes, 3 LED's Overhang: 15 mm
Power source: E model AC 220V, 50/60 Hz Usable cartridge weight: 3.5 to 8.5 g

K,G model AC 240V, 50/60 Hz Maximum weight: 18.5 9 (With head shell)
Power consumption: 10 W Offset angle: 215

Dimensions:
Weight:

Turntable section
Drive system:

Motor:

Turntable platter:

450(W) x 106.5(H) x 375(D) mm
7 kg

Freouency generated direct drive
system

4 phase 8-pole linear tOrque DD hall
motor x 1

DC motor x 2

Aluminum alloy diecast

Applicable tracking force:

Cartridge section
Type:
Output voltage:
Separation:
Frequency response:
Compliance:

Stylus pressure:

0 to 3 g (0 to 29.4 mN)
(direct readout of tracking force)

VM type

2.5 mV

More than 17 d8 (33-1 (3 rpm, 1 kHz)
20 to 20,000 Hz

15 x 10 ' cm/dyne.

2.59 (24.5 mN) (Normal)

Diameter 300 mm Load impedance: 50 kolims
Weight 1.3 kg Load capacitance: 100 pF
Moment of inertia: 220 kgi'cm'
Speeds: 33-13, 45 rpm

Wow 8i flutter:

Signal to noise ratio:

(Weighted)

0.028% (WRMS)
More than 57 d8 (IEC B)
More than 75 dB (DIN B)

The speCifications and external appearance of this set are
subject to change WitliOut prior rtwice.

Page 2

DISASSEMBLY INSTRUCTIONS 4) Remove the 11 screws (See figure 4)
1. To Remove Tray VHS? 3 - I0
1) Remove the turntable platter TT sheet
2) Gently pull the tray out to its midway point
3) Press the left side of the tray as shown by the arrow and
lift off. (See figure 1)

VT1®3-l0

VTi$3-l0

5) While turning the main cabinet back and forth and from
side to side, pull the main cabinet off in the direction of

the weight shaft.
Since removal of the main cabient is difficult, do not

Fig.1

2. To Remove Main Cabinet "V t° 3" it' (See figure 5)
1) Remove the headshell assembly, main weight and plate 8
(elevation). (See figure 2
Headshell assembly
Plate 8 elevation
Main weight

w _

Headshell ossy Elevation plafeB Main welghf Adjustments

1. Stylus Height Adjustment
1) Adjust the stylus height (with cueing lever in the UP
position) as follows:

39- 2 . If too high
Turn the screw on the elevation plate to the right until
2) Remove the tray (See figure 1) the distance between record and stylus is 5 mm.
3) Remove the cover (main cabinet) o If too low
(See figure 3) Turn the screw on the elevation plate to the left until

the distance between record and stylus is 5 mm. (See figure E

[-Fi-fl-r-

P

Fig. 3