Sony MHC-V02 Service Manual - Page 2

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MHC-V02

License and Trademark Notice

• "CD" logo is trademark.

• WALKMAN

and WALKMAN

logo are registered trademarks

of Sony Corporation.

• MPEG Layer-3 audio coding technology and patents licensed from

Fraunhofer IIS and Thomson.

• Windows Media is either a registered trademark or trademark

of Microsoft Corporation in the United States and/or other

countries.

• This product is protected by certain intellectual property rights

of Microsoft Corporation. Use or distribution of such technology

outside of this product is prohibited without a license from

Microsoft or an authorized Microsoft subsidiary.

• LDAC™ and LDAC logo are trademarks of Sony Corporation.

• The BLUETOOTH

word mark and logos are registered trade-

marks owned by the Bluetooth SIG, Inc. and any use of such

marks by Sony Corporation is under license. Other trademarks

and trade names are those of their respective owners.

• Android, Google Play, and the Google Play logo are trademarks

of Google LLC.

• Apple, the Apple logo, iPhone, iPod, and iPod touch are trade-

marks of Apple Inc., registered in the U.S. and other countries.

App Store is a service mark of Apple Inc., registered in the U.S.

and other countries.

• Use of the Made for Apple badge means that an accessory has

been designed to connect specifically to the Apple product(s)

identified in the badge, and has been certified by the developer

to meet Apple performance standards. Apple is not responsible

for the operation of this device or its compliance with safety and

regulatory standards.

• All other trademarks are trademarks of their respective owners.

• In this manual, ™ and

marks are not specified.

SAFETY-RELATED COMPONENT WARNING!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE

WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.

REPLACE

THESE

COMPONENTS

WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS

MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR

LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES

PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-

TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE

PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-

NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS

PUBLIÉS PAR SONY.

WITH

SONY

PARTS

NOTES ON CHIP COMPONENT REPLACEMENT

•

Never reuse a disconnected chip component.

•

Notice that the minus side of a tantalum capacitor may be

damaged by heat.

FLEXIBLE CIRCUIT BOARD REPAIRING

•

Keep the temperature of the soldering iron around 270 °C

during repairing.

•

Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

•

Be careful not to apply force on the conductor when soldering

or unsoldering.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following

safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, "metallized" knobs,

screws, and all other exposed metal parts for AC leakage. Check

leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and

from all exposed metal parts to any exposed metal part having a

return to chassis, must not exceed 0.5 mA (500 microamperes).

Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers' instructions to use these

instruments.

2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a

VOM or battery-operated AC voltmeter. The "limit" indication

is 0.75 V, so analog meters must have an accurate low-voltage

scale. The Simpson 250 and Sanwa SH-63Trd are examples

of a passive VOM that is suitable. Nearly all battery operated

digital multimeters that have a 2V AC range are suitable. (See

Fig. A)

To Exposed Metal

Parts on Set

0.15 μF

Fig. A. Using an AC voltmeter to check AC leakage.

1.5 kΩ

voltmeter

(0.75 V)

Earth Ground

SYS SET