Akai AC 623 R Service Manual

Page 7

III. DISASSEMBLY OF THE MAIN COMPONENTS

3) Disconnect the two connectors caretuity.

3-1. CD PLAYER BLOCK
sit Remove the CD PLAYER BLOCK before proceeding.

TRAVERSE
3-1-1. Removal or the TRAVERSE MECHA. user-u.
t) Remov- th- TRAVERSE COVER by releasing the two

tabs in the direction vi the arrow as strewn in Figs J-L

Fig. 3-3

4) Remove the tour retaining screws, then remove the
TRAVERSE MECHA

5] Proceed In the reverse order tor installation but never
unmlder the ahoned circuit betore connecting the ihroe
conneaors.

TRAVERSE COVER

Fig. 3-1

34-2. Replacement at the SLED MOTOR

1) Remove the TRAVERSE MECHA (refer to sodion 3-1-1)

2) Unsalder the leads or the SLED and SPINDLE MOTOR:
then remove the MOTOR PCS. 2

SOLDERING PART

2) Short the circuit on ma PICK UP BLOCK with WHO! is
shwm in Fig. 3-2.
thezTo pretax the laser diode lrorn damag- cailod by
high voltage slant: electricity, a part at the PCB an the
PICK LIP BLOCK has Id be shorted bolero
dismmeatng the connectors. Alter mpiaeemenL he
sure to connect the Mo mnneaor: and then remove
the solder oi the shorted circuit hetero turning the

W" 0 SPINDLE
moron

PICK UP
BLOCK
RED
MARK

WTOR PCB
SLED MOTOR

Fig, 3-4

11

3) Remove the two retaining screws. then remove the SLED
MOTOR.
NexL extract the plastic gear Item the motor shalt and
attach it onto the new mator's shatt,

A) Roassemble in the reverse order.

About til. SFINDLE MOTOR:

Replacement at the SPINDLE MOTOR itself is not
recommended. because adjustment at me TURN TABLE
height is quite critical and requires the use at a special jig

3-1-3. Replacement at tho PICK UP BLOCK

I) Remove the TRAVERSE MECHA (rater to section 3-1 -1)r

2) While pressing the O stepper upwards. pull the SLIDE
SHAFT to the right to remove the PICK UP BLOCK. then
ropima the PICK UP BLOCK.

SLED SHAFT

® sroppsn

PICK UP BLOCK TURN TABLE
Frg. 3-6

3) Raassornble in the reverse order.

3-14. Replacement 0' "I9 LOADING MOTOR
1) Slide the protruding part at Iha GEAR HOLDER PART in
the direclbn OI [ha armw, then pull (ml the TRAY BLOCK

Fig. 3-7

2] Unhook the LOADING BELT with tweezers.

LOADING BELT
Fig. 3-8

3) Unsolder the lead wires at the LOADING MOTOR with a
soldering iron.

4) While releasing the LOADING MOTOR': three retaining
hooks, push the motor putty pen down with your middle
finger to remove the LOADING MOTOR, then regime n.

GRAY STRIPE

LOADING
MOTOR

Fig. 3-9

5) Reassemtzie in the reverse order. Make sure that the wire
with the gray stripe is connected It: the melcrs O marked
terminal when soldering

3-1-5. Removal of the TRAY BLOCK

1) It the TRAY BLOCK is in the in" position, slide the
protruding pan otthe GEAR HOLDER PART in the direction
at the arrow and pullout the TRAV BLOCK slowly (rater to
Fig. 3-7;

2) In order to disengage the two stoppers. careiuily press
the ® pan at tho TRAY BLOCK downwards while pulling
the TRAY BLOCK out as shown in Fig. 3-10.