DOWNLOAD Sony STR-DE245 / STR-DE345 Service Manual ↓ Size: 4.93 MB | Pages: 32 in PDF or view online for FREE

AEP Model

UK Model

E Model

Australian Model

STR-DE245/DE345

US Model

Canadian Model

Chinese Model

PX Model

STR-DE345

Manufactured under license from Dolby Laboratories Licensing
Corporation.
“DOLBY” the double-D symbol 

;

 “AC-3” and “Pro Logic” are

trademarks of Dolby Laboratories Licensing Corporation.

Photo: STR-DE345

— Continued on next page —

Rated Power Output at

(8 

Ω

 at 20 Hz – 20 kHz,

Stereo Mode

THD 0.09 %)
100W + 100W

Reference Power Output

(8

Ω

 at 1 kHz, THD 0.7%)

Front: 100 W + 100 W
Center: 100 W
Rear: 100 W + 100 W

Frequency response

TV/SAT, CD, MD/TAPE,
VIDEO, 5.1CH/DVD
10 – 50 kHz        dB

Inputs

Sensitivity

Impedance

S/N

CD,
5.1CH/
DVD,
MD/TAPE,

150 mV

50

85 dB

TV/SAT,

kilohms

VIDEO

Outputs

MD/TAPE REC OUT:
   Voltage: 150 mV,
   Impedance: 10 kilohms
VIDEO AUDIO OUT:
   Voltage: 150 mV,
   Impedance: 10 kilohms
SUB WOOFER:
   Voltage: 2 V
   Impedance: 1 kilohms
PHONES: Accepts low
   and high impedance
   headphones

Muting

Full mute

BASS BOOST

+6 dB at 70 Hz

TONE

±6 dB at 100 Hz and
10 kHz

FM Stereo, FM/AM superheterodyne tuner

Tuning range

87.5 – 108.0 MHz

Antenna terminals

75 

Ω

, unbalanced

Intermediate frequency

10.7 MHz

Sensitivity

Mono: 18.3 dBf, 4.5 µV
Stereo: 38.3 dBf, 45 µV

Usable sensitivity

11.2 dBf, 2 µV (IHF)

S/N

Mono: 76 dB
Stereo: 70 dB

Harmonic

Mono: 0.3 %

distortion at 1 kHz

Stereo: 0.5 %

Separation

45 dB at 1 kHz

Frequency response

30 Hz –15 kHz       dB

Selectivity

60 dB at 400 kHz

+0.5
–2.0

+0.5
–2.0

Tuning range

10 kHz interval*
   530 – 1,710 kHz
9 kHz interval
   531 – 1,710 kHz

Antenna

Loop antenna

Intermediate frequency

450 kHz

Usable sensitivity

50 dB/m (at 1,000 kHz
or 999 kHz)

S/N

54 dB (at 50 mV/m)

Harmonic distortion

0.5 % (50 mV/m, 400
Hz)

Selectivity

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

* You can change the AM tuning interval between 9

kHz and 10 kHz. Turn off the receiver and press
the ?/1 (power) for more than 4 seconds until
“INITIAL” appears.
1) After turning in any AM station, turn off the

receiver.

2) Hold down PRESET TUNING + button and

press the ?/1 (power) button .
“9 k STEP” appears.

To change to 10 k Step, repeat step 1 and 2
until “10 k STEP” appears. Note that all preset
stations, index names and sound field are
cleared after you make the procedure above.

2

Inputs

VIDEO, TV/SAT, 5.1CH/DVD:
   1 Vp-p 75 

Ω

Outputs

VIDEO, MONITOR:
   1 Vp-p 75 

Ω

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

235 W

Dimensions

17 

×

 5

6

/

8

 

×

 12 inches)

(430 

×

 145 

×

 304 mm)

Mass (Aporox.)

7.3 kg (16 lb 2 oz)

Supplid accessories

FM wire antenna (1)
AM loop antenna (1)
Remote commander (remote) (1)
Size AA (R6) batteries (2)
Operating Instructions of the remote RM-PP404

Design and specifications are subject to change without notice.

Parts No.

DE345:  US model

4-226-462-0s

DE345:  Canadian model

4-226-462-1s

DE345:  Australian model

4-226-462-2s

DE345:  Singapore, Malaysia model

4-226-462-3s

DE345:  Chinese model

4-226-462-4s

DE345:  E, Saudi Arabia, PX model

4-226-462-5s

DE345:  AEP model

4-226-462-6s

DE345:  Russian, East European model

4-226-462-7s

DE345:  Mexican model

4-226-462-8s

DE345:  Argentine model

4-226-462-9s

DE245:  Australian model

4-226-468-2s

DE245:  Singapore, Malaysia model

4-226-468-3s

DE245:  E, Saudi Arabia model

4-226-468-4s

DE245:  AEP, UK model

4-226-468-5s

DE245:  Mexican, Russian,

 East European model

4-226-468-6s

3

0

0

    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 AC leakage. Check leakage as
described below.

    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 

µ

F

1.5 k

Ω

AC
Voltmeter
(0.75 V)

Earth Ground

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

0

·········································································· 4

······································································ 6

3-1. Block Diagram ······························································ 7
3-2. IC Block Diagrams ························································ 8
3-3. IC Pin Function Description ·········································· 8
3-4. Circuit Boards Location ················································ 9
3-5. Printed Wiring Board   Main Section ·························· 10
3-6. Schematic Diagram   Main Section (1/3) ···················· 11
3-7. Schematic Diagram   Main Section (2/3) ···················· 12
3-8. Schematic Diagram   Main Section (3/3) ···················· 13
3-9. Printed Wiring Board   Panel Section ·························· 14
3-10. Schematic Diagram    Panel Section ··························· 15
3-11. Printed Wiring Board   Power Section ························ 16
3-12. Schematic Diagram    Power Section ·························· 17
3-13. Printed Wiring Board   Video Section ························· 18
3-14. Schematic Diagram    Video Section ··························· 18

4-1. Front Panel Section ····················································· 19
4-2. Chassis Section ···························································· 20

······································· 21

4

1

qs   

4

5

6

7

8

9

qa

2

3  

0

1

I/

1

 (POWER) button

2

SPEAKERS ON/OFF SWITCH button

3

PHONE jack

4

VIDEO  button
TV/SAT button
5.1CH/DVD button
MD/TAPE button
CD button
TUNER button

5

SOUND FIELD ON/OFF,
MODE  + ,  –  buttons
BASS  + ,  –  buttons
TREBLE  + ,  –  buttons

6

MENU  < ,  > ,  + ,  –  buttons

7

MASTER VOLUME control

8

MUTING button
BASS BOOST botton

9

PRESET/PTY SELECT   + ,  –  buttons
TUNING  + ,  –  buttons
FM/AM button
FM MODE button
SHIFT button
MEMORY button

0

SET UP button
NAME button
ENTER button

qa

SOUND CONTROL LEVEL,SUR buttons

qs

DIMMER button
DISPLAY button