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XM-PX70WT/BU/PN
1-2
1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design
unless authorized in writing by the manufacturer. Replacement parts must be identical to those
used in the original circuits. Services should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s
warranty and will further relieve the manufacture of responsibility for personal injury or property
damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded
by them necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. Replacement parts which have these special safety characteristics are identified in
the Parts List of Service Manual. Electrical components having such features are identified by
shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a
substitute replacement which does not have the same safety characteristics as the recommended
replacement parts shown in the Parts List of Service Manual may create shock, fire, or other
hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges
for the prevention of electric shock and fire hazard. When service is required, the original lead
routing and dress should be observed, and it should be confirmed that they have been returned
to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts
of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control
shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure
the leakage current from each exposed metal parts of the cabinet , particularly any exposed
metal part having a return path to the chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.)
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms
per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by
a 0.15 F AC-type capacitor between an e xposed
metal part and a known good earth ground.
Measure the AC voltage across the resistor with the
AC voltmeter.
Move the resistor connection to eachexposed metal
part, particularly any exposed metal part having a
return path to the chassis, and meausre the AC
voltage across the resistor. Now, reverse the plug in
the AC outlet and repeat each measurement. voltage
measured Any must not exceed 0.75 V AC (r.m.s.).
This corresponds to 0.5 mA AC (r.m.s.).
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that\
these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
Good earth ground Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
Burrs formed during molding may be left over on some parts of the chassi\
s. Therefore,
pay attention to such burrs in the case of preforming repair of this sys\
tem.
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XM-PX70WT/BU/PN
1-3
The laser diode in the traverse unit (optical pick up) is easy to be destroyed by clothes and the human body
to the electrified static electricity.
Please note the explosion by static electricity when repairing.In the equipment which uses an optical pick up (laser diode), an optical pick up is destroyed by the static
electricity of the work environment.
Please do the earth processing and work.
2. About the earth processing for the electrostatic destruction prevention
1) Earth of work stand
Please pull the conductive material (conductive sheet) or the iron plate to the depository
place of the traverse unit (optical pick up), and take the earth to ground.
2) Human body earth
Please use the anti-static wrist strap to exhaust the electrified static electricity to the human body.
3. Handling the optical pick up
1) Please return according to a correct procedure based on short processing after exchanging
parts.
2) Do not use a tester to check the condition of the laser diode in the optical pick up .The tester 's internal
power source can easily destroy the laser diode.
4. Attention when unit is disassembled
Please refer to "Disassembling method" for how to detach .
Conductive material (conductive
sheet) or the iron plate
anti-static wrist strap
Attention when MD pickup is exchanged
1. About the static electricity protection measures
Solder short
1) Please be sure to solder before a flexible wire is removed from connector on a main printed
circuit board as shown.
if you removes without soldering.the MD picking up assembly might destroy
2) When installing , solder in the part of short round should be removed after a flexible wire is connected with
connector.
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XM-PX70WT/BU/PN
1-18
E-17
E-16
E-15
D-17
D-16
D-15 A-17
B-17
C-17 A-16
B-16
C-16 A-15
B-15
C-15 A-14
B-14
C-14 A-13
B-13
C-13 A-12
B-12
C-12 A-11
B-11
C-11 A-10
B-10
C-10 A-9
B-9
C-9 A-8
B-8
C-8 A-7
B-7
C-7 A-6
B-6
C-6 A-5
B-5
C-5 A-4
B-4
C-4 VSIO2
F0CN
VDIO2 DTRF
CKRF XLRF NC
NC
LDDR NC
NC
APCR TFDR
TRDR NC
FRDR FFDR
VDC4 VSC4
SRDR FS4
SPFD
SPRD SFRD
TEST2
TEST1 FGIN
TST2
EFMO
TEST3 VSIO3 TST3
VDIO3 SPCU
SPDW SPDVTST4
SPCW SPCVVSC5
SLDW SLDV
SLCV
SLCU
VDC5
BYPS TST5
SLCW -
O -
O
O
O -
-
O -
-
O
O
O -
O
O -
-
O
O
O
O
O I
I
I
O
O I
-
O -I
O
O
O I
I
-
O
O I
I
-
O
O
I/O 2.5V I/O Vss
Filter cutoff control output
2.5V I/O VDD
Controller data output
Controller clock output
Controller latch output
Open
Open
Laser digital APC PWM output
Open
Open
Laser APC reference PWM output
Tracking servo drive PWM output (+)
Tracking servo drive PWM output (-)
Open
Focus servo drive PWM output (-)
Focus servo drive PWM output (+)
Internal logic VDD (1.8V)
Internal logic GND
Sled servo drive PWM output (-)
176.4kHz clock output (X'tal system)
Spindle servo drive output
Spindle servo drive output
Sled servo drive PWM output (+)
Test terminal Connect to GND
Test terminal Connect to GND
Spindle CAV servo FG input
Test terminal Open
EFM output at recording
Test terminal Connect to GND
2.5V I/O Vss
Test terminal Open
2.5V I/O VDD
Blush less spindle motor drive comparate input (U)
Blush less spindle motor 3 phase drive truth output (W)
Blush less spindle motor 3 phase drive truth output (V)
Test terminal Open
Blush less spindle motor drive comparete input (W)
Blush less spindle motor drive comparate input (V)
Internal logic GND
Blush less sled motor 3 phase drive truth output (W)
Blush less sled motor 3 phase drive truth output (V)
Blush less sled motor 3 phase drive comparate input (V)
Blush less sled motor 3 phase drive comparate input (U)
Internal logic VDD (1.8V)
Open
Test terminal Open
Blush less sled motor 3 phase drive comparate input
2.Pin function (4)
Pin No. Symbol I/O Function
