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2

0.5 % (50 mV/m,

400 Hz)

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

kHz. After tuning in any AM station, turn
off the receiver. Hold down the PRESET
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: 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

Tuner section:

PLL quartz-locked
digital synthesizer
system

Preamplifier section:

Low-noise NF type
equalizer

Power amplifier

section:
Pure-complementary
SEPP

120 V AC, 60 Hz

US MODEL :

STR-DE975: 270 W
In standby condition:
0.9 W
STR-DE875: 260 W
In standby condition:
0.9 W

Canadian MODEL :

Others :

STR-DE975: 350 VA
In standby condition:
0.9 W
STR-DE875: 340 VA
In standby condition:
0.9 W

2 switched, total

120 W/1A Max

Dimensions 430 

× 157.5 × 369 mm

(17 

× 6 1/8 × 14 4/8 in.)

including projecting

parts and controls

9.5 kg (20 lbs. 16 oz.)

Design and specifications are subject
to change without notice.

87.5 - 108.0 MH

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

dB

60 dB at 400 kHz

With 10-kHz tuning scale:

530 - 1710 kHz

c)

With 9-kHz tuning scale:

531 - 1710 kHz

c)

Loop antenna

450 kHz

50 dB/m (at 1,000 kHz

or 999 kHz)

50 dB/m (at 999 kHz)

54 dB (at 50 mV/m)

• FM wire antenna (1)
• AM loop antenna (1)
• R6 (size-AA) batteries (2)
• US, Canadian model only

• Audio/video/control S connecting cord (1)
• Control S connecting cord (1)

• STR-DE975 only

• Remote commander RM-PP505L (remote) (1)

• STR-DE875 : US, Canadian, E, Malaysia, 

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

BASS:

99 Hz~1.0 kHz
(21 steps)

MID:

198 Hz~10 kHz
(37 steps)

TREBLE:

1.0 kHz~10 kHz
(23 steps)

Gain levels:

±10 dB, 1dB step

48 kHz (TV/SAT,

MD/DAT*,
MD/TAPE**
OPTICAL IN)

96 kHz (DVD/LD

OPTICAL IN,
COAXIAL IN)

MD/DAT*,

MD/TAPE** (OUT);
VIDEO 1, VIDEO 2:
(AUDIO OUT):
Voltage: 250 mV,
Impedance: 10
kilohms

SUB WOOFER:

Voltage: 2 V
Impedance: 1
kilohms

PHONES:

Accepts low- and
high-impedance
headphones

DVD/LD (coaxial):

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

DVD/LD, TV/SAT,

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

 Singapore,  Chinese, Australian model only

• STR-DE875 : AEP, UK model only

• Commander, standard RM-U305A (remote)

10 kHz. After tuning in any AM station,
turn off the receiver. Hold down the
TUNING + button and press the 1/u
button. All preset stations will be erased
when you change the tuning interval. To
reset the scale to 9 kHz, repeat the procedure.

AEP, UK MODELS :

531 - 1602 kHz

E MODEL :

530 - 1610 kHz (10 kHz

step)

d)

531 - 1602 kHz (9 kHz

step)

d)

Others :

531 - 1602 kHz (9 kHz

step)

US, Canadian MODELS :

AEP, UK MODELS :

Others :

AEP, UK MODELS :

35 dB

Others :

US, Canadian MODELS :

AEP, UK MODELS :

E MODEL :

230 V AC, 50/60 Hz

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

Australian MODEL :

240 V AC, 50 Hz

Others :

220-230 V AC, 50/60 Hz

220 W
In standby condition:
0.9 W

US, Canadian MODELS :

AEP, UK MODELS :

1 switched, max 100 W

E, Chinese MODELS :

Others :

2 switched, total 100 W max

1 switched, total 100 W max

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)

µF

Ω

0

PARTS No.

4-232-578-0s

4-232-578-1s

4-233-045-0s

4-233-045-1s

4-233-045-2s

4-233-045-3s

4-233-045-4s

4-233-045-5s

4-233-045-6s

4-233-045-7s

MODEL

DE975:US model

DE975:Canadian model

DE875:US model

DE875:Canadian model

DE875:Australian model

DE875:Malaysia,Singapore model

DE875:Chinese model

DE875:E model

DE875:AEP model

DE875:UK model

4

··········································································· 5

······································································ 7

3-1.

Circuit Boards Location ..................................................... 8

3-2.

Block Diagrams ................................................................ 10
• Main Section .................................................................. 10
• Power Section ................................................................ 11

3-3.

Printed Wiring Board – Digital Section – ........................ 12

3-4.

Schematic Diagram – Digital Section (1/4) – .................. 13

3-5.

Schematic Diagram – Digital Section (2/4) – .................. 14

3-6.

Schematic Diagram – Digital Section (3/4) – .................. 15

3-7.

Schematic Diagram – Digital Section (4/4) – .................. 16

3-8.

Printed Wiring Board – Main Section – ........................... 17

3-9.

Schematic Diagram – Main Section (1/3) – ..................... 18

3-10. Schematic Diagram – Main Section (2/3) – ..................... 19
3-11. Schematic Diagram – Main Section (3/3) – ..................... 20
3-12. Printed Wiring Board – Display Section – ....................... 21
3-13. Schematic Diagram – Display Section – .......................... 22
3-14. Printed Wiring Board – Video Section – .......................... 23
3-15. Schematic Diagram – Video Section – ............................. 24
3-16. Printed Wiring Board – Speaker Section – ....................... 25
3-17. Schematic Diagram – Speaker Section – ......................... 26
3-18. Printed Wiring Board – Power Section – ......................... 27
3-19. Schematic Diagram – Power Section – ............................ 28
3-20. IC Block Diagrams ........................................................... 29
3-21. IC Pin Function Description ............................................. 33

4-1.

Front Panel Section .......................................................... 36

4-2.

Chassis Section ................................................................. 37

······································· 39

5

This section is extracted
from instruction manual.

? 

/ 

1

DISPLAY

DIMMER

ON SCREEN

MEMORY SHIFT

FM MODE

FM

AM

PRESET
TUNING

TUNING

–

+

–

+

MULTI CHANNEL DECODING

A.F.D.

SOUND FIELD

MULTI /2CH A. DIRECT

DIGITAL CONCERT HALL

EQUALIZER

MUTING

INPUT MODE

MODE

2ND ROOM

FUNCTION

6.1 CH DECODING

CINEMA STUDIO EX

A

A

MODE

2CH

PHONES

VIDEO 3 INPUT

VIDEO       L AUDIO R

SPEAKERS

EQ

SURR

LEVEL

SET UP

NAME

ENTER

B

B

C

MASTER VOLUME

+

–

0

1

2 3

4

5

8

6

7

qa

9

v

1

?/1

Press to turn the receiver on and off.

2

DISPLAY button
Press repeatedly to change the information on the
display window as follows:

Index name of the component or the preset station*

v

FUNCTION button indication or frequency**

v

Sound field applied to the program source

3

DIMMER button
Press DIMMER repeatedly to adjust the brightness of
the display (5 steps).
When set to the dimmest setting, the display is turned
off. However, when you press any button, the display
becomes the brightest setting temporary.

4

The following buttons operate the built-in tuner. For
details, see “Receiving Broadcasts” starting from page 44.

PRESET TUNING +/– buttons
Scan all preset stations.

TUNING +/- buttons
Scan all the available radio stations.

MEMORY button
Press to memorize a preset station.

SHIFT button
Selects a memory page for preset stations.

FM MODE button
If “STEREO” flashes in the display and the FM stereo
reception is poor, press this button. You will not have
the stereo effect but the sound is improved.

FM button
Selects the FM band.

AM button
Selects the AM band.

5

MULTI CHANNEL DECODING indicator
This indicator lights up when the unit is decoding
signals recorded in a multi channel format.

6

Use the CINEMA STUDIO EX buttons to enjoy the
CINEMA STUDIO EX sound effects.

A/B/C buttons
Press to activate the CINEMA STUDIO EX A, B or C
sound field (page 32).

7

Use the SOUND FIELD buttons to enjoy surround
sound. For details, see “Enjoying Surround Sound”
starting from page 30.

A.F.D. button / indicator
Press to set the receiver to automatically detect the
type of audio signal being input and perform proper
decoding (if necessary).

MODE button / indicator
Press to activate the sound field selection mode (page
31).

2CH button / indicator
Press to output sound from only the front (left and
right) speakers.

8

MASTER VOLUME control
After turning on the component you selected, rotate to
adjust the volume.

V:XXX

Any video source to enjoy with
the audio from the selected
component

A:XXX

Any audio source to enjoy with
the video from the selected
component

qa

INPUT MODE button
Press INPUT MODE to select the input mode for your
digital components. Each time you press the button,
the input mode of the currently selected component
switches.

AUTO 2CH

Give priority to the analog audio
signals input to the AUDIO IN
(L/R) jacks when there is no
digital signals.

COAXIAL FIXED

Specify the digital audio signals
input to the DIGITAL COAXIAL
input jacks.

OPTICAL FIXED

Specify the digital audio signals
input to the DIGITAL OPTICAL
input jacks.

ANALOG 2CH FIXED

Specify the analog audio signals
input to the AUDIO IN (L/R)
jacks.

When the MULTI CH is assigned to a specific function
using SET UP menu (page 51), “AUTO MULTI CH”
and “MULTI CH FIXED” are displayed instead of
“AUTO 2CH” and “ANALOG 2CH FIXED”.

AUTO MULTI CH

Give priority to the analog audio
signals input to the MULTI CH
IN jacks when there is no digital
signals.

MULTI CH FIXED

Specify the analog audio signals
input to the MULTI CH IN jacks.

9

2ND ROOM button (STR-DE975 only)
Press repeatedly to select the audio signals for output
to a stereo amplifier or speakers in another room (page
12).
Each press selects another audio source (except
PHONO) to be output from the 2ND ROOM jacks.
“SOURCE” selects the same program source as the
main function controls.

• Even if 2ND ROOM is set to “SOURCE”, the sound from

front speakers (L/R) is not output when the receiver is set
to MULTI CH IN.

• Only signals from components connected to the analog

inputs are output through the 2ND ROOM OUT jacks. No
signals are output from components connected to only the
digital input jacks.

0

FUNCTION control
Rotate to select the component you want to use.

VCR

VIDEO 1 or VIDEO 2

Camcorder or video game VIDEO 3 (STR-DE975 only)

DVD or LD player

DVD/LD

TV or satellite tuner

TV/SAT

Tape deck

TAPE (STR-DE975 only)

MD or Tape deck

MD/TAPE (STR-DE875 only)

MD or DAT deck

MD/DAT (STR-DE975 only)

CD or SACD player

CD/SACD

Built in tuner

TUNER

Turntable

PHONO

After selecting the component, turn on the component
you selected and play the program source.

• After selecting VCR, camcorder, video game, DVD player,

or LD player, turn on the TV and set the TV’s video input
to match the component you selected.

MODE button
Press to select and play another video/audio source in
combination with the selected component.
Each time you press the button, the display changes as
follows:

  t

 V: XXX t   A:XXX

selected component T