DOWNLOAD Sony STR-DE485 / STR-DE485E Service Manual ↓ Size: 5.64 MB | Pages: 52 in PDF or view online for FREE

3

Part No.

US

4-238-188-0s

Canadian

4-238-188-1s

Australian

4-238-188-2s

Singapore

4-238-188-3s

Chinese

4-238-188-4s

E

4-238-188-5s

AEP

4-238-188-6s

UK

4-238-188-7s

Mexican

4-238-188-8s

Argentina

4-238-188-9s

Taiwan

4-238-189-9s

Ω

µF

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 microampers.).
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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)

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.

LES COMPOSANTS IDENTIFIÉS 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 PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

4

Main unit ................................................................................. 5
Remote button description ....................................................... 6

2-1.   Case ..................................................................................... 7
2-2.   Front Panel Section ............................................................. 8
2-3.   Back Panel ........................................................................... 8
2-4.   Digital Board ....................................................................... 9
2-5.   Standby Board ..................................................................... 9
2-6.   Main Board ....................................................................... 10

...................................................................... 11

4-1.   IC Pin Description ............................................................. 12
4-2.   Circuit Boards Location .................................................... 15
4-3.   Block Diagram – Tuner/Audio Section – .......................... 16
4-4.   Block Diagram – Digital Section – ................................... 17
4-5.   Block Diagram – Video/Display Section – ....................... 18
4-6.   Block Diagram – Power Section – .................................... 19
4-7.   Printed Wiring Boards – Main Section – .......................... 21
4-8.   Schematic Diagram – Main Section (1/2) – ...................... 22
4-9.   Schematic Diagram – Main Section (2/2) – ...................... 23
4-10. Printed Wiring Board – Digital Section (1/2) – ................ 24
4-11. Printed Wiring Board – Digital Section (2/2) – ................ 25
4-12. Schematic Diagram – Digital Section (1/2) – ................... 26
4-13. Schematic Diagram – Digital Section (2/2) – ................... 27
4-14. Printed Wiring Board – Video Section – ........................... 28
4-15. Schematic Diagram – Video Section – .............................. 29
4-16. Printed Wiring Boards – Display Section – ...................... 30
4-17. Schematic Diagram – Display Section – ........................... 31
4-18. Printed Wiring Boards – Power Section – ......................... 32
4-19. Schematic Diagram – Power Section – ............................. 33
4-20. IC Block Diagrams ............................................................ 34

5-1.   Case Section ...................................................................... 35
5-2.   Front Panel Section ........................................................... 36
5-3.   Chassis Section-1 .............................................................. 37
5-4.   Chassis Section-2 .............................................................. 38

......................................... 39

5

This section is extracted
from instruction manual.

GB

wd

wf

wh

wj

wk

wl

es

ed

ef

eg

eh

ek

ej

e; 

ea

wg

1

7

8

4

qs

0 qa

5

2 3

6

qf qg

qj

qh

qkqlw;

qd

waws

9

Use this page to find the location of buttons
that are mentioned in the text.

FM MODE (Models of area code

CEL, CEK only) ed, (Except for
models of area code CEL, CEK)
ef (31)

INPUT MODE qg (21)
IR (receptor) 4 (38, 45, 51)
LEVEL 0 (20, 27, 55)

MASTER VOLUME wd (20, 49)
MD/TAPE qj (21)
MEMORY eh (30, 32)
MENU +/– e; (16, 27, 35, 36)
MENU </> ea (16, 27, 35, 36)
MODE wj (24, 50)
MULTI CHANNEL DECODING

(indicator) (Except for
STR-DE485E) 7 (21)

MULTI CH IN (Except for

STR-DE485E) qf (21)

MUTING wf (21, 49)

NAME 8 (35)
PHONES (jack) ek (21)

PRESET/PTY SELECT +/–

(Models of area code CEL, CEK
only) 3 (32, 33)

PRESET TUNING +/– (Except

for models of area code CEL,
CEK) 3 (32, 53)

PTY (Models of area code CEL,

CEK only) ef (33)

SET UP 6 (4, 16, 36, 54)
SHIFT eg (32)
SLEEP (STR-DE485E only)qf

(36)

SURR qd (27, 54)

TREBLE +/– qh (29, 54)
TUNER ws (21, 30-32, 35)
TUNING +/– 5 (31)
VIDEO 1 qk (21)
VIDEO 2 w; (21)

`/1

 (power) 1 (4, 15, 20, 29,

30, 53)

2 CH wh (25)

A.DEC wk (23–25)
AM (Except for models of area

code CEL, CEK) es (30, 31)

BASS +/– wg (29, 54)
CD ql (21)
CINEMA STUDIO EX A, B, C

9 (23, 24)

Digital Cinema Sound (indicator)

qs (23)

DIMMER ej (22)
DISPLAY  2 (22, 33, 51)
Display qa (22)
DVD/LD wa (21)

ENTER wl (35)
FM (Except for models of area

code CEL, CEK) ed (30, 31)

FM/AM (Models of area code

CEL, CEK only) es (30, 31)

            r

NAME      8 (35)

     R

R

6

GB

You  can use the remote RM-U306 to operate
the components in your system.

N

X

m

M

.

>

-

f

F

G

g

?/1

?/1

O

x

The tables below show the settings of each
button.

SLEEP

Receiver

Activates the sleep
function and the duration
which the receiver turns
off automatically.

?/1

Receiver

Turns the receiver on or

off.

GB

VIDEO 1

Receiver

To watch VCR.
(VTR mode 3)

VIDEO 2

Receiver

To watch VCR.
(VTR mode 1)

DVD/LD

Receiver

To watch DVD or laser
disc.

MD/TAPE Receiver

To listen to Minidisc or
audio tape.

CD

Receiver

To listen to compact disc.

TUNER

Receiver

To listen to radio
programs.

SHIFT

Receiver

Press repeatedly to select
a memory page for
presetting radio stations
or tuning to preset
stations.

D.TUNING Receiver

Tuner station direct key-
in-mode.

A.DEC

Receiver

Select AUTO DECODE
mode.

MODE

Receiver

Selects sound field mode.

2CH

Receiver

Selects 2CH mode.

TEST

Receiver

Press to output test tone.

TONE

MAIN

Receiver

Press this button

MENU

repeatedly to select one
of the four cursor modes:
SURR, LEVEL, SET UP
and NAME.

MULTI CH Receiver

Selects MULTI  CH IN
source.

MENU </> Receiver

Selects a menu item.

MENU +/– Receiver

Makes adjustment or
change the setting.

MUTING Receiver

Mutes the sound from the

receiver.