2-11. Tone Arm Assy; Electrical Adjustment - Sony PS-HX500 Service Manual

2-11. TONE ARM ASSY

Note 1: When turning the main unit over, refer to "NOTE IN THE
CASE OF THE REVERSING THE MAIN UNIT" on page 3.
wire rear side
MAIN board
[white]
[blue/green]
[red]
front side
4 six screws
(PTP3 14)
Note 3: When removing the screws, make sure
that you hold the tone arm assy.
5 Draw the wire out
Note 2: If you remove the six screws (step 4), the tone arm assy
will fall. When removing the screws, make sure that
you hold the tone arm assy.
PS-HX500
2 screw
(3 12) 1 Remove the
three solders.
3 wire
rear side
top side
of the hole.
hole
6 tone arm assy
DC MOTOR SPEED ADJUSTMENT
When replace the motor, perform the DC motor speed adjustment.
Necessary equipment:
• Speed adjustment sheet (stroboscope) (Fig A)
Note: Enlarge "SPEED ADJUSTMENT SHEET (STROBOSCOPE)"
of page 7 and print it.
• LED light bulb without the inverter (Fig. B)
• LED light bulb socket (Fig. C)
• Insulation fl athead screwdriver for resistor adjustment
• Stand for putting the main unit
– Fig. A –
Power supply frequency
for 60 Hz.
inside : for 45 rpm check
outside : for 33 rpm check
Power supply frequency
for 50 Hz.
inside : for 45 rpm check
outside : for 33 rpm check
– Fig. B – – Fig. C –
Installation method:
Stand
Height that the flathead
screwdriver can be used.
Holes for adjustment
(Not covered the holes by a stand)
Procedure:
1. Installing the main unit by referring to "Installation method".
2. Place the rubber mat onto the turntable, and place the speed
adjustment sheet (stroboscope) onto it.
Speed adjustment
sheet
Rubber mat
Turntable
15 15
SECTION 3

ELECTRICAL ADJUSTMENT

3. The turntable is rotated at a rotation speed 33 rpm.
SPEED/POWER
rotary switch knob
4. Connect the socket fi tted with a LED light bulb into an electri-
cal outlet.
5. The LED light bulb is lit near to the turntable.
6. Insert the insulation fl athead screwdriver for resistor adjust-
ment into screw hole "33" at the bottom of the main unit.
Adjust the turntable speed by rotating the insulation fl athead
screwdriver to the left or right so that the speed adjustment
sheet pattern looks like it has stopped moving.
Note 1: Check the applicable place of the speed adjustment sheet to match
the power supply frequency (50 Hz/60 Hz) that is used in the LED
light bulb.
– Bottom view –
7. When you have completed the adjustment of 33 rpm, then per-
form the adjustment of 45 rpm.
8. The turntable is rotated at a rotation speed 45 rpm.
SPEED/POWER
rotary switch knob
front side
Stand
9. The LED light bulb is lit near to the turntable.
10. Insert the insulation fl athead screwdriver for resistor adjust-
ment into screw hole "45" at the bottom of the main unit.
Adjust the turntable speed by rotating the insulation fl athead
screwdriver to the left or right so that the speed adjustment
sheet pattern looks like it has stopped moving.
Note 2: Check the applicable place of the speed adjustment sheet to match
the power supply frequency (50 Hz/60 Hz) that is used in the LED
light bulb.
– Bottom view –
PS-HX500
front side
front side