Aiwa AD R650 Service Manual

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SIM Code No. 84-025

AIWA® om
SERVICE MANUAL

MODEL ND.

STEREO CASSETTE

DECK

AID-REED

TYPE. HB,HUB,CB,UB,EB,KB,GB,ZB

SPECIFICATIONS
Type Stereo cassette tape deck Tape speed 4.8 cm/sec. (1 -7/8 ips)
Track format 4 tracks, 2 channels Rewind time 65 sec, (0-60)
Circuitry 20 I05, 35 transistors, Fast forward time 65 sec. (C-60)
22 diodes. 34 LEDs, Recording system AC bias (frequency 85 kHz)
2 photo-interrupter Erase system AC erase
Power supply AD-R650 E, Z Motor DC Servomotor for capstan x1
AC 220 V, 50/60 H1 00 motor ior reels x l
AD-R65O K, G Head Recording, playback head: DX com»
AC 240 V, 50/60 Hz bination head x l
AD-R650 U, C Erase head: Double gap ferrite light
AC 120 V, 50/60 Hz head x 2
AD-RGSO H Inputs LINE IN maximum input
AC 120 W220 W240 V switchable, sensitivity: 50 mV (over 50 k0)
50/60 Hz Outputs LINE OUT standard output level:
Power 038 V (O VU);suitable load
consumption 20 W impedance: over 50 k I):
Frequency Headphones: 8 9
response METAL tape: 20-19000 Hz Dimensions 420 (W) X1 16 (H) X 300 (D) mm
CrO2 position tape: 20-18000 Hz Weight 50 kg
' NORMAL tape: 20- 1 7,000 Hz Accessories Stereo pin cord (2)
Signal-to-noise
ratio 73 )dB (METAL tape DOLBY C NR a Design and specifications are subject to change without
0N noticev
WOW and mute" According to DIN 45 500 041% I Noise reduction and headroom extension manufactured
0935 (WRMS) under license from Dolby Laboratories Licensing Corporat-
ion HX Professional originated by Bang and Olutsen.
I Dolby" and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation,

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Follow the instructions carefully, which will allow the user to optimise the products' performance

and give many years of serivce.

1. No scratch and melting shall be made to covered lead-wires of an
a.c. primary circuit including mains leads.

2. No illegibility shall be given to the specification plate, the cau-
tion labels, the fuse labels and others.

3. When, on pattern sides of circuit boards, additional repair-parts
have been made up, the parts shall be firmly glued to circuit
boards or other components, unless the parts can be attached
firmly.

4..The following matters shall be maintained as they are, when
repairing.

ll Soldering of lead-wire ends
*Care should be taken of the space distance in an a.c. pri-
mary circuit as well as soldering.
2] Wiring and holding of lead-wires with wire-clips and binders
3] Materials of lead-wires
e.g.; For UL models, lead-wires to be used shall he ap~
proved or accepted by the UL.
4] Location of all kinds of insulators
5) Setting of voltage selector switch
Set the Voltage Selector Switch to 240V, 220V, or 120V,
According to your Local Voltage.

5. After repaired, the insulation resistance or leakage current shall
be measured with 500 i 5V D.C and shall be not less than 1M9.

Measuring Point

Connect to Chases or Outside 6 ct Pm Jack

Rating 1 More than Ml/500V DC Pm Jack (6)

4% ©

y

Chassis (e)

__-___.

AC Power Cord(@)

6. General instructions for mechanism repair

1) The heads, capstan and pinch roller shall be cleaned of good
quality alcohol after repaired, because dirty heads shallcause
distorted sounds while dirty capstan and pinch roller shall
occur wow/flutter and taKE«up fault.

2) When oiling, only one or two drops shall be applied so as

not to run over and be dispersed. Note should be taken of the
metal fitting for the capstan and rotating portions of the
idlers and pinch roller, especially.

3) E-rings and poly slider washers shall be replaced with new

ones, if once those have been removed, - No re-utilization
due to unreliability.

4) Regular spare-parts shall always be used for repair, because

using irregular parts and tampering with the products shall
cause deterioration, mulfunction and damage.