Jvc XLV 182 BK Service Manual

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XL-V1823K
XL-VZSZBK

-Safety Precautions

1.The 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 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

having such features are identified by shading on the schematics and by (A) on the Parts
List in the Service Manual. The use of a substitute repalcement which does not have the
same safety characteristicsas 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,
A,,,controLshafts,,etc.), ,to,,,b,e,su|:e, thstroduct,,is,,,saf,e,,,to,operate,witho,ut,,danger,,,o,f,, electricaL, ,
shock.
Do not use a line isolation transformer during this check.

0 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.).

0 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 1,5009 10 W
resistor paralleled by a 0.15 11F AC-type capacitor between an exposed metal part and a
known good earth ground.

AC V0 LTM ETER

Measure the AC voltage across the resistor -
with the AC voltmeter. a grilmfiollgoo ,
Move the resistor connection to each exposed 3 °_ °' "we ensmVWJ
metal part, particularly any exposed metal part
having a return path to the chassis, and 0.15pF Ac TYPE
meausre the AC voltage across the resistor. -||--
Now, reverse the plug in the AC outlet and a": this
repeat each measurement. Any voltage w. >§§2heefgosed
measured must not exceed 0.75VAC (r.m.s.). 150°91°W metal part.
This corresponds to 0.5 mA AC (r.m.s.). Good earth ground

-Warmng

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.

Page 3

Important for Laser Products

1. CLASS 1 LASER PRODUCT

2. DANGER : Invisible laser radiation when open and
interlock failed or defeated. Avoid direct exposure to
beam.

3. CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.

4. CAUTION : The compact disc player uses invisible
laser radiation and is equipped with safety switches
which prevent emission of radiation when the drawer
is open and the safety interlocks have failed or are
defeated. It is dangerous to defeat the safety
switches.

VARNING : Osynlig laserstralning nar denna del ar
6ppnad och spérren i-ir urkopplad. Betrakta
ej strélen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina nakymattomalle laserséteilylle. Ala

katso sateeseen.

XL-V1BZBK
XL-V28ZBK

5. CAUTION : If safety switches malfunction, the
' laser is able to function.

6. CAUTION : Use of controls, adjustments or
performance of procedures other than those
specified herein may result in hazardous radiation
exposure.

ADVARSEL: Usynlig laserstraling ved ébning, nér
sikkerhedsafbrydere er ude af funktion. Undgé
udsaettelse for stréling.

ADVARSEL: Usynlig Iaserstréling ved apning, nér
sikkerhetsbryteren er avslott. unnga utsettelse for
straling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL
(Except for the U. S. A.)

stréling ved aiming. nsr
sikkerhedsafbrydere er ude
at funktlon. Undgaudsaet»

telse for strallng. (d)

DANGER: invisible laser VARNING: Osynling laser-
radiation when open and stréling nar denna del
interluckfailed or defeated. aoppnad och spanen a:
AVOID DIRECT EXPOSURE urkoppled. Betrakta E]

To BEAM. (e) stAlen. (s)
ADVARSEL: Usynling Iaser- VARO: Avamessaia suo-

jalukitus ohltenaessa olet
alttiina nakymattomalle
lasersateilylle. Ala katso

siteeseen. (r)

EIEI

1-3

Page 13

XL-V182BK

XL-VZBZBK
3. Functions
Pi" N0- Symbol IIO Functionsand operations
1 PD I APC amp input terminal
2 LD 0 APC amp output terminal
3 LD ON | APC ONIOFF control terminal
4 LDP -- Connected to ground
5 VCC -- Power supply
6 RF- I Inverse input pin for RF amp
7 RF OUT 0 RF amp output
8 RFIN | RFinput
9 C AGt IIO (nnnnrting pin nf AGF loop filter
10 ARF 0 RF output
11 C.ENV IIO A capacitor is connected to this terminal to detect the envelope of RF signal
12 C.EA I/O A capacitor is connected to this terminal to detect the envelope of RF signal
13 CS BDO 1/0 A capacitor is connected to detect the lower envelope of the RF signal
14 BD0 0 BDO output pin
15 CS BRT I/O A capacitor is connected to detect the lower envelope of the RF signal
16 OFTR O Of-track status signal output
17 /NRFDET 0 RF detection signal output
18 GND -- Ground
19 ENV " Envelope uutyut
20 VREF 0 Reference voltage output
21 LB OFF ~ Connect to ground
22 VDET 0 Vibration detection signal output
23 TE BPF I Input pin of tracking error through BPF
24 CROSS 0 Tracking error cross output
25 TE OUT 0 Tracking error signal output
26 TE- I Inverse input pin for tracking error amp
27 FE OUT 0 Output pin of focus error
28 FE- I Inverse input pin for focus error amp
29 FBAL I Focus balance control
30 TBAL I Tracking balance control
31 PDFR -- Not use
32 PDER -- Not use
33 PDF I I-V amp input
34 PDE I I-V amp input
35 PD RD | I-V amp input
36 PD AC I I-V amp input

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