Akai AAV 12 DPL Service Manual

Page 2

CONTENTS

SAFETY INSTRUCTIONS ., . , , ...... .. ,.
SPECIFICATIONS 5
I. DISASSEMBLY,
II. PRINCIPAL PARTS LOCATION
III.ADJUSTMENT
IV. PARTS LIST
V. WIRING DIAGRAM
VI. BLOCK DIAGRAM .. . .
VII. SCHEMATIC DIAGRAM ...,..... ...»...
VIH.PCB LAYOUT
IX. INFORMATION OF ICs MI~COM
ABBREVIATIONS ..

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SAFETY INSTRUCTIONS

PRECAUTIONS DURING SERVICING
1. Parts identified by theA (*)symbo| parts are critical for
safety. Replace them only with pans whose numbers are
specified,
In addition to safety. other parts and assemblies are
specified for conformance with such regulations as
those applying to spurious radiation.
These must also be replaced only with specified replace
merits.
Examples:RF converters, tuner units, antenna selection
switches, RF cables. noise-blocking capacitors, noise-
biooking filters, etc.
3. Use specified internal wiring. Note especialry:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads
4. Use specilied insulating materials for hazardous live
parts, Note especially:
1) Insulating Tape
2) PVC tubing
3) Spacersfinsulating bamers)
4) Insulating sheets for tmnsistors
5) Plastic screws for fixing micro switches
When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors. etc).
wrap ends of wrra securely about the terminals belore

Make sure that Wires do not contact heat generating
parts (heat sinks, oxide metal film resustors, fusible resus-
tors. etc).

. Check il replaced wires do not contact sharply edged or
pointed pans.

Also check areas surrounding repaired parts.

Make sure that toreign objects (screws, solder droplets,
etc.) do not remain insrde the set,

MAKE YOUR CONTRIBUTION TO PROTECT
THE ENVIRONMENT

Used battena With the ISO symbol Ior recy~

cling aswell as small accumulatorsl (recharge- % <9

i

.U

Ptg

V

5090

able battenes). mini- batteries (cells) )and starter

batteries should not be thrown into the garbage can.

Please leave them at an appropriate depot. All other house
hold batteries can be thrown out With the household waste.

SAFETY CHECK AFTER SERVICING

After seNicing, make measurements or leakage-current or
resistance in order to check if exposed parts are accept-
ably insulated from the supply Circuit,

The leakage-current measurement should be done between
accessrble metal parts (such as chassis, ground terminalt
microphone jacks, signal input/output connectors. etc.) and
the earth ground through a resister or 1500 ohms paralleled

with a 0t15uF capacitor, under the was normal working
condition.

The Ieakagecurrent should be lass than 0.5mA rrns AC.
The resistance measurement should be done between
accesible exposed metal parts and power cord plug prongs
with the power swrtch ON"fif included). The resistance
should be more than 2.2Mohmst

SYMBOLS FOR PRIMARY DESTINATION
Alphabet indicates the destination or the units
as listed below.

Symbol PrinncipalDestinatIon
USA

UK

Europdexcept, UK)
Australia

Germany

Universal

Custom version

4

SPECIFICATIONS

[AA-V12 DPL]

Power output

Front
Bypass .

80W~80W (I'HD 0.1%)

Surround sow-50w (THU (15%)
Rear , 12.5W'12.5W (THD 0.8%)
Center .. 50w (THD 0.5%)
Total Harmonic Distortion
Front

Bypass ..... 0.1 %

Surround 0.5%
Rear . 0.8%
Center 0.5 /a
Frequency Response 10Hz-60KHleypass)
S/N Ratio ...................... 85d8
Input Sensitivity(Bypass)

AUDIO

Phono ......... 3mV

CD, TUNER. TAPE/DAT, VIDEO). 2 ....... . 200rnV
VIDEO

VIDEOI. 2 levp
Tone Control

BASS OdB

TREBLE , 1 0GB
Power Source ....... . AC 230V, 50Hz
Dimension ...... 420(w) x 150(H) >< 350(D)mm
Weight 12.2Kg
Power Consumption ..... 150W