Page 1
XV-NA7SL
3
SECTION 1
Important Safety Precautions
1.1 Safety Precautions
(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 manufacturers 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 characteris-
tics 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 feat u re s a re
identified by shading on the schematics and by ( )
on the Parts List in the Service Manual. The use of a sub-
stitute 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 reassembling.
(5) Leakage shock hazard testing)
After reassembling 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, particu-
larly 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 ohm 10W resistor
paralleled by a 0.15 µF AC-type capacitor between an
exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the ACvoltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and measure 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.).
1.2 Warning
(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 lo-
cal voltage.
1.3 Caution
Burrs formed during molding may be left over on some
parts of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety.
When replacing them, be sure to use the parts of the same type
and rating as specified by the manufacturer. (Except the JC version)
Page 2
XV-NA7SL
4 1.5 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
- In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
- Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can
easily destroy the laser diode.
1.6 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too
long a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4)I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
Page 62
XV-NA7SL 2-14
BK811
K415C434
K422 K416C433
K412R469 R470
CN401
R473
R471 R475R477 R483 R487
R489 R491R493 K411
R499 R497 R495
R353
R351 R443 R445 R447
R449
K421R437
R435 R431R433R451
R459 R453R455
C461 C462C421C422
K417
K418 C441
C442C430 C429
R361
C435 R369
R444 R442R434 R432
R438R436
IC812C416
C414
R448R450
R452
IC812C426
C428R454
R466 R456 C418R468
C409 R363
C431
IC811
C415 C413 R367
IC811
C425 C427
C417C424
R458R460
C1426
Q402R464 R462
C423
J401 C1425Q401
R463
R461
C474
C473
R359R360
C470 C1467
R362
C475 R366R370
R484R474 R472
R478R476
IC822C456
C454
R488R490
R492
IC822C466
C468R494
R496 C458R358
C410 R364
C469
IC821
C455C453 R368
IC821
C465 C467
C457
R357C464
R498R350
Q404R354 R352
C463Q403
R485 R486 R446
IC411
R479
R481R373
R375
R355R439
R441
R457R465 R467
K419 K420R377K413
R371
R389R365
R440
C412
C420C432
C411
C419 IC412
R374
R376
R378K414
R372
R390
R482R480
C452
C460
R356C1468
C451
C459
C1466
C1465
NQR0007-002X470/6.3
NQR0007-002X NQR0007-002X470/6.3
NQ70007-002X47 47
QGF1016C1-17
18K
18K 36K1.6K 2.7K 3.6K
750 7501K NQR0007-002X
560 27K 18K
10K
100 2.7K 2.7K 3.6K
750
NQR0007-002X1.6K
36K 18K18K750
560 1K18K
1000P 1000P1000P1000P 0.01
0.011.5 220/6.3
22
1.5 470
2.7K 30K18K 18K
1.6K36k
NJM4580L120P
4700P
3.6K750
750NJM4580L100/16
100/161K
220 18K 0.012220
1500P 3.3k
0.01
NJM4580L
120P 4700P 470
NJM4580L
100/16 100/16
0.01247/25
27K560
2200p
2SD2144S/VW/-T10K 100
47/252200p2SD2144S/VW/-T
10K
100
470/6.3
470/6.3
1047
1.5 220/6.3
22
1.5 10470
2.7K18K 18K
1.6K36k
NJM4580L120P
4700P
3.6K750
750
NJM4580L100/16
100/161K
18K 0.012220
1500P 3.3k
0.01
NJM4580L
120P4700P 470
NJM4580L
100/16 100/16
0.012
22047/25
27K560
2SD2144S/VW/-T10K 100
47/252SD2144S/VW/-T
2.7K 2.7K2.7K
MN35505
30K
30K470
470
22030K
30K
27K220 220
NQR0007-002X
NQR0007-002XNQR0007-002X NQR0007-002X470NQR0007-002X
470
1010
30K
1200P
1000P0.22
1200P
1000P MN35505
470
470
470NQR0007-002X
470
10
30K30K
1200P
1000P
2200.22
1200P
1000P
2200p 2200p
DAC1CS D.GND
AOUT1 AOUT2 DDATA
LRCK
BCK
MUTE2 DCLK
DCLK DAC2CS
DAC1CS
DDATA
BCK
MUTE2-12VDCLK
LRCK AOUT1DDATA
LRCK
+12V BCKAOUT2
MUTE2 DAC2CS
Surround audio section
TO CN704
SHEET 5
SHEET 8 Audio signal
Page 70
XV-NA7SL
3-4
Item
Parts number Parts name Area A
Parts list (General assembly) 2/2
Q'ty Description
Block No. M1MM
45 LE20647-024AREAR PANEL
UW 1
46 QYSBSGY3008MSPECIAL SCREW 1
47 QYSBSGY3008MSPECIAL SCREW 1
48 QYSBSGY3008M SPECIAL SCREW 1
49 QYSBSGY3008MSPECIAL SCREW 1
50 QYSBSGY3008MSPECIAL SCREW 1
51 QYSBSGY3008M SPECIAL SCREW 2
52 QYSBSGY3008MSPECIAL SCREW
B,E,EN 2
53 QYSBSGY3008MSPECIAL SCREW 1
54 QYSBSGY3008MSPECIAL SCREW 1
55 QYSBSGY3008MSPECIAL SCREW 1
56 QYSBSGY3008MSPECIAL SCREW 1
57 QMF51E2-1R6-J1FUSE 1
58 QHS3771-108 CORD STOPPER 1
59 QMPG070-244-JCPOWER CORD
A 1
QMPN160-200-JDPOWER CORD
B 1
QMPK190-200-JCPOWER CORD
E,EN,US,UW 1
60 QZW0004-001WIRE CLAMP 2
61 LE20645-001AMETAL COVER 1
62 QYSBSGG3008ET.SCREW 3
63 QYSDSG3008N T.SCREW 2
64 LE31040-001AORNAMENT 1
65 LE20663-001AFITTING BASE 1
66 LV41843-001ALASER CAUTION 1
67 LE31028-001ALCD LENS 1
A
A
A
A
68QYSBSE3008Z SCREW1
A
