SONY STR K502P Service Manual

STR-DE575/K502/K502P

SERVICE MANUAL

Ver 1.0 2001. 04

Photo : STR-DE575

Dolby Laboratories Licensing Corporation. “DOLBY” the double-D symbol ; “AC-3” and “PRO LOGIC” are trademarks of Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 8 ohm loads, both channels driven, from 20 20,000 Hz; rated 100

watts per channel minimum RMS power, with no more than

0.09% total harmonic distortion from 250 milliwatts to rated output (USA model only).

Amplifier section

Rated Power Output at Stereo mode

(8 ohms 20 Hz - 20 kHz,

THD 0.09%) 100 W + 100 W

Reference Power Output

(8 ohms at 1 kHz, THD

0.7%)

Front

: 100 W/ch

: 100 W

Center Surround

: 100 W/ch

Frequency response

MULTI CH IN, CD,

MD/TAPE, DVD/ LD, TV/SAT, VIDEO*, AUX: 10 Hz - 50 kHz +0.5/ –2 dB (with sound field and equalizer bypassed)

Inputs (Analog)

MULTI CH IN, CD,

DVD/LD, MD/ TAPE, TV/SAT, VIDEO*, AUX:

Sensitivity: 250 mV Impedance: 50 kilohms

S/N

: 96 dB (A, 250

)

a) Input short. b) Weighted network, input level.

Inputs (Digital)

DVD/LD (coaxial):

Sensitivity: – Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF)

Canadian Model

Australian Model

DVD/LD, TV/SAT

(Optical): Sensitivity: – Impedance: – S/N: 100 dB (A, 20 kHz LPF)

Outputs

Sampling Frequency

MD/TAPE, (OUT);

VIDEO*, (AUDIO OUT): Voltage: 250 mV, Impedance: 10 kilohms

SUB WOOFER:

Voltage: 2 V Impedance: 1 kilohms

PHONES:

Accepts low- and high-impedance headphones

±6 dB

48 kHz (TV/SAT, MD/

TAPE OPTICAL IN)

96 kHz (DVD/LD

OPTICAL IN, COAXIAL IN)

US Model

STR-DE575/K502/K502P

STR-DE575/K502P

E Model

STR-K502P

1) Depending on the sound field settings and

sources, there may be no sound output.

9-873-862-11

— Continued on next page —

FM STEREO FM-AM RECEIVER

Sony Corporation

Audio Entertainment Group General Engineering Dept.

STR-DE575/K502/K502P

FM tuner section

Tuning range

Antenna terminals

Intermediate frequency

Sensitivity

Usable sensitivity

S/N

Harmonic distortion at 1 kHz

Separation

Frequency response

Selectivity

AM tuner section

Tuning range

Antenna

Intermediate frequency

Usable sensitivity

87.5 - 108.0 MHz

75 ohms, unbalanced

10.7 MHz

Mono: 18.3 dBf,

2.2 µV/75 ohms

Stereo: 38.3 dBf

22.5 µV/75 ohms

11.2 dBf, 1 µV/75 ohms

Mono: 76 dB Stereo: 70 dB

Mono: 0.3% Stereo: 0.5%

45 dB at 1 kHz

30 Hz - 15 kHz +0.5/–2

60 dB at 400 kHz

With 10-kHz tuning

scale: 530 - 1710 kHz

With 9-kHz tuning

scale: 531 - 1710 kHz

Loop antenna

450 kHz

50 dB/m (at 1,000 kHz

or 999 kHz)

S/N

Harmonic distortion

54 dB (at 50 mV/m)

0.5 % (50 mV/m, 400 kHz)

Selectivity

At 9 kHz: 35 dB At 10 kHz: 40 dB

c) You can change the AM tuning interval to 9

kHz. After tuning in any AM station, turn off the receiver. Hold down the TUNING + button and press the ?/1 button. All preset stations will be erased when you change the tuning interval. To reset the scale to 10 kHz, repeat the procedure.

Video section

Inputs

Outputs

*** STR-DE575 only

Video: 1 Vp-p 75 ohms S-video***:

Y: 1 Vp-p 75 ohms C: 0.286 Vp-p 75 ohms

Video: 1 Vp-p 75 ohms S-video***:

Y: 1 Vp-p 75 ohms C: 0.286 Vp-p 75 ohms

General

System

Tuner section:

PLL quartz-locked digital synthesizer system

Preamplifier section:

Low-noise NF type equalizer

Power amplifier

section: Pure-complementary SEPP

Power requirements

120 V AC, 60 Hz

Power consumption

Models of area code U:

220W In standby condition: 1 W

Models of area code CA:

315 VA In standby condition: 1 W

AC outlets

1 switched, total 120 W/1A Max

Dimensions

430 × 308.5 × 157.5 mm (14.5 × 10.4 × 5.3 in.)

including projecting

parts and controls

Mass (Approx.)

7.5 kg (16 lbs. 9 oz.)

7.4 kg (16 lbs. 6 oz.)

Supplied accessories

• FM wire antenna (1)

• AM loop antenna (1)

•

R6 (size-AA) batteries (2)

• STR-DE575 only

• Model of area code U only

- Remote commander RM-U305 (remote) (1)

• Model of area code CA only

- Remote commander RM-PP505 (remote) (1)

• STR-K502 only

• Remote commander RM-U305 (remote) (1)

Design and specifications are subject to change without notice.

STR-DE575/K502/K502P

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for A C leakage. Check leakage as described below.

LEAKAGE

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. F ollow the manufactur ers’ 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 A C 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 ar e 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)

MODEL IDENTIFICATION

— BACK PANEL —

MODEL

DE575 : US DE575 : Canadian K502P : US K502P : Canadian K502P : Australian K502P : Singapore K502P : Mexican K502 : US

Parts No.

PARTS No.

4-232-240-0s 4-232-240-1s 4-232-240-3s 4-232-240-4s 4-232-240-5s 4-232-240-6s 4-232-240-7s 4-232-240-8s

To Exposed Metal

Parts on Set

0.15 µF

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

1.5 kΩ

Earth Ground

Voltmeter (0.75 V)

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 WITH SONY PARTS 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 IDENTIFÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

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