STR-DG820 - Sony Audio Service Manual (repair manual). Page 2

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 

Notes on chip component replacement
• 

Never reuse a disconnected chip component.

• 

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

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 V AC range are suitable.  (See 
Fig. A)

The area code of the receiver you purchased is 
shown on the lower right portion of the rear panel 
(see the illustration below).

Any differences in operation, according to the area 
code, are clearly indicated in the text, for example, 
“Models of area code AA only”.

Area code

AM tuner section
Tuning range

Antenna (aerial)

Loop antenna

Intermediate frequency

 

450 kHz

5)

You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off
the receiver. While holding down TUNING
MODE, press POWER on the receiver. All preset
stations will be erased when you change the tuning
scale. To reset the scale to 10 kHz (or 9 kHz),
repeat the procedure.

Video section
Inputs/Outputs

Video:

1 Vp-p, 75 ohms

COMPONENT VIDEO:

Y: 1 Vp-p, 75 ohms
P

B

/C

B

: 0.7 Vp-p, 75 ohms

P

R

/C

R

: 0.7 Vp-p, 75 ohms

80 MHz HD Pass Through

Tuning scale
10 kHz step

9 kHz step

CEL, CEK, ECE

–

531 kHz –
1,602 kHz

U, CA 

             530 kHz – 

1,710 kHz

5)

531 kHz –
1,710 kHz

5)

General
Power requirements

Power output (DIGITAL MEDIA PORT)

DC OUT:

5V, 0.7 A MAX

Power consumption

Power consumption (during standby mode)

0.7 W

 

(When “CTRL:HDMI” in
HDMI menu is set to
“CTRL OFF”)

Dimensions (width/height/depth) (Approx.)

17 × 6 1/4 × 12 5/8 inches

 

(430 × 157.5 × 318 mm)
including projecting parts
and controls

Mass (Approx.)

18 lb 12 oz (8.5 kg) (U, CA)

8.4 kg (CEL, CEK, 
ECE, AU, TW, KR, E51)

Supplied accessories
Operating instructions
Quick Setup Guide (1)
FM wire antenna (aerial) (1)
AM loop antenna (aerial) (1)
Remote commander (RM-AAP021) (1)
R6 (size-AA) batteries (2)
Optimizer microphone (ECM-AC2) (1)

Design and specifications are subject to
change without notice.

U                           250 W

CA                        320 VA

U, CA                           120 V AC, 60 Hz

CEL, CEK, ECE

 230 V AC, 50/60 Hz

AU, E51

530 kHz –
1,710 kHz

5)

531 kHz –
1,710 kHz

5)

KR, TW

530 kHz –
1,610 kHz

5)

531 kHz –
1,602 kHz

5)

AU

240 V AC, 50 Hz

TW

110 V AC, 60 Hz

KR

220 - 230 V AC, 50/60 Hz

E51

120/220/240 V AC, 50/60 Hz

CEL, CEK, ECE,

 

AU, KR, E51

230 W

TW

220 W

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.