Sony hcd hdx 275 service manual

Page 2

HCD-H DX275I H DX277WC/ H DX279WI H DX475I H DX576WFI H DX675

AIISImIInn nnd New anland models:
531m; » 1.7! Hit (With IIIC uucrml

sci III 9 kHz)
SKOkHA » 1.7m kHz lwIIh the Inlcnnl
sci III 10 kHz)

Other models SllkHz » 1.502 kHz lwIIh rm» .rnortnl
sci III 9 kHz)
SKOkHA » 1.5m kHz lwIIh the Inlcnnl
sci III 10 kHz)

Antenna lacrial) AM loop nnlcnna (aerial)

InIcrmchnIc frequency 450 kHz

Video Section

Outputs VIDEO. I Vprp 75 ohms
COMPONENT,

Y | Vprp 750mm
Po Ca, PRCR. 0.7Vpr

75 ohms

HDMI ()IJT: Type Am prnl

General
Power requirements
Nonh Amcncan models:
Other models
Power consumption
HCD.HDx275,/Hsz77wc,HDx475 HDX675
0n. I65 \I
Smndhy: 0.3 W on me
Power Saving mode)
Hcm-IDxmm HDX576WF
Un I25 w
Smndhy: 0.3 W on me
Power Saving mode)
()Illpux mltagc (DIGITAL MEDIA FORT)
DC 5 v
()Illpux currcnr (DIGITAL MEDIA PORT)
700 rnA
430 mm x 35 mm x 42o
min(l7 in x 3 Win x
16 in no lw II .1) Incl
pchclmg pans
SZkglll leoz)

120 V AC. 60 Hz
220 V » 240 V AC, 50 60 Hz

Duncnsmm lappmx.)

Muss {approx )

DcsIgn and specifications are subjccx to change wuhout IIoIIcc.

SAFETY-RELATED COMPONET WARNING!

COMPONENTS IDENTIFIED BY MARKAOR DOTTED LINE
WITH MARKAON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MARQUE ASUR
LES DIAGRAMMES SCHEMATIQUES ET LA LISTE DES
PIECES SONT CRITIQUES POUR LA SECURITE DE FONC-
TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIECES SONY DONT LES NUMEROS SONT DON-
NES DANS CE MANUEL 0U DANS LES SUPPLEMENTS
PUBLIES PAR SONY.

2

Notes on chip component replacement

- Never reuse a disconnected chip component.

- Notice that the minus side ofa tantalum capacitor may be dam-
aged by heat.

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

SAFETY CHECK-OUT

After correcting the original service problem, perform the follow-
ing 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 2 VAC range are suitable. (See
Fig. A)

To Exposed Metal
Parts on Set

A C
/ voltmeter
(0.75 V)

g 1.5 kn

0.15mE

_7_ Earth Ground
Fig. A. Using an AC voltmeter to checkAC leakage.