Akai GX 75 Mk2 Service Manual

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Akai GX 75 Mk2 Service Manual

Extracted text from Akai GX 75 Mk2 Service Manual (Ocr-read)


Page 2

-k SAFETY INSTRUCTIONS

PRECAUTIONS DURING SERVICING

1. Pan: indenllfled by the a 1*) symbol are cnhcal for
salary. Replace only with pen; number specified.

2. In addition to saIsly. other pens Ind assemblies are
specified ior conformance with such regulations as
those applying to spurious radiation,

These must also be replaced only with specified re-
placement:

Examples RF converters. iuner units, antenna selecwr
switches, RF cables, noise blocking modellers noise
blocking filters. eic.

3. Use speoiiled internal wiring Note especially:

1) VVlres covered with PVC tubing
2) Double lnsulaled wires
3) High voltage leads

4. Use specified insulating materials ior hazardous live

pans Note especially.

1) Insulalr'en Tape

2) PVC tubing

3) Spacers (lnsulaling barriers)

4) Insulelion sheets lor transistors

5) Plastic screws lor fixing microswitoh (especially in
turntable)

5. When replacing AC primary side components (translor-
rriers. power cords. noise blocking capecilors. etc).
wrap ends of wires securely about the terminals be
fore soldering.

been?-

Observe that wires do not connect heat producing
pans (heatsinks oxide metal film resistors. fusible re-
sislors. elm).

9-

*INFOFIMATION

7. Check that replaced wires do not contact sharp edged
or pointed Dane

5. Also check areas surrounding repaired locations.

5. Use care that loraign obpecis (screws, solder droplete
etc) do not remain inside the set

SAFETY CHECK AFTER SERVICING

Alter servicing, make measurements oi leakage-current
or resistance in order to deiermine that exposed parts
are acoepubly insulated lrom lhe supply circuil.

The leakege tween accessible meial pens (such as chassis, ground
terminal. microphone jack. signal input/output conner
Iors, etc.) and the earth ground through a resister or
1500 ohms paralleled with a 0.15 "F capacitor. under the
unil-s normal working condiiions. The leakagevcurrent
should be less men 0.5 mA rms AC.

The resistance rneesuremenr should be done between
eweseible exposed melalpens and power cord plug
prongs with the power swrlch (ti included) 'ON'. The re-
srsiarice should be more than 2.2 Mohrns.

SYMBOLS FOR PRIMARY DESTINATION

Primary destinalions 0! units are indicated with me roi-
lowing alphabetic

Doslinations

USA
UK
Canada

senvrce uANuAL

I. DISASSEMBLY

In case ol trouble. etc. necessriating dismantling. please Glsmanlle in the order shown in Ihe phoiegrapns

Heassemble in reverse order.

1. Removal of UPPER COVER

3 E3
we cover room mm.
A

3 Removal ol lroni panel

eorrw COVER

recur PANEL

-ii-

was: cove:

1) Remove the (rent panel-s a bottom retaining screws.

2) Remove the front panel's 3 upper reiaining screws.

3) Pull Ihe from panel Iorward in the directlon of the arrow
( 5 )-

2. Removal of cassette lid

FowEe '
SWITCH CASSETTE LID £232:

1) Turn lhe power 0N and press ihe STOP/EJECT button
to open lhe cassette lid.

2) Remove lhe casseile lid by pulling it in the direction or
lhe arrow ( it )

4. Removal of bottom cover

BOTTOM COVER

C

°L§< ©\ '_

i_._r .5
mom o

./O

1) Remove lhe bottom cover-s O retaining screw.

2) Loosen the (a) screw.

3) Slide ihe bonom cover In the dll-eCllon DI the arrow (9)
to remove it.

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