Samsung STR-DE1075 User manual

SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
US Model
Canadian Model
SPECIFICATIONS
STR-DE1075
Ver 1.2 2001.11
9-873-841-13 Sony Corporation
2001K0500-1 Home Audio Company
C2001.11 Published by Sony Engineering Corporation
– Continued on next page –
This receiver incorporates Dolby* Digital and Pro
Logic Surround and the DTS** Digital Surround
System.
* Manufactured under license from Dolby
Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are
trademarks of Dolby Laboratories.
**“DTS” and “DTS Digital Surround” are registered
trademarks of Digital Theater Systems, Inc.
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 (US model only).
Amplifier section
POWER OUTPUT
Rated Power Output at Stereo Mode
(8 ohms 20 Hz –20 kHz, THD 0.09 %)
100 W + 100 W
Reference Power Output
(8 ohms 1 kHz, THD 0.7 %)
FRONT1):100 W + 100 W
CENTER1): 100 W
SURR1): 100 W + 100 W
SURR BACK1): 100 W
1) Depending on the sound field settings and the
source, there may be no sound output.
Frequency response
PHONO
CD/SACD, TAPE,
MD/DAT, TV/SAT,
DVD/LD, VIDEO 1, 2,
3
Inputs (Analog)
PHONO
MULTI CH IN (1, 2),
CD/SACD, TAPE,
MD/DAT, DVD/LD,
TV/SAT, VIDEO 1, 2,
3
2) INPUT SHORT.
3) Weighted network, input level.
RIAA equalization curve
±0.5 dB
10 Hz –100 kHz
±3 dB (with sound field,
equalizer, and bass boost
bypassed)
Sensitivity: 2.5 mV
Impedance: 50 kilohms
S/N2): 86 dB (A, 2.5 mV3))
Sensitivity: 150 mV
Impedance: 50 kilohms
S/N2) : 96 dB
(A, 150 mV3))

2
STR-DE1075
Inputs (Digital)
DVD/LD (Coaxial)
DVD/LD, TV/SAT,
MD/DAT (Optical)
Outputs
TAPE, MD/DAT
(REC OUT), VIDEO
1, 2 (AUDIO OUT)
FRONT L/R,
CENTER,
SURROUND L/R,
SURROUND BACK,
SUB WOOFER
Sensitivity: –
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
Sensitivity: –
Impedance: –
S/N: 100 dB
(A, 20 kHz LPF)
Voltage: 150 mV
Impedance: 2.2 kilohms
Voltage: 2 V
Impedance: 2.2 kilohms
EQ
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, 1 dB step
FM tunersection
Tuning range 87.5 - 108.0 MHz
Antenna terminals 75 ohms, unbalanced
Sensitivity
Mono: 18.3 dBf, 2.2 µV/75 ohms
Stereo:
38.3 dBf, 22.5 µV/75 ohms
Usable sensitivity 11.2 dBf, 1 µV/75ohms
S/N
Mono: 76 dB
Stereo: 70 dB
Harmonic distortion at 1 kHz
Mono: 0.3%
Stereo: 0.5%
Separation 45 dB at 1 kHz
Frequency response 30 Hz –15 kHz,
+0.5/–2 dB
Selectivity 60 dB at 400 kHz
AM tuner section
Tuning range
With 10-kHz tuning scale: 530 –1.710 kHz
4)
With 9-kHz tuning scale: 531 –1.710 kHz
4)
Antenna Loop antenna
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 kHz)
Selectivity
At 9 kHz: 35 dB
At 10 kHz: 40 dB
4) You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in anyAM station, turn off
the receiver. Hold down TUNING –and press
?/1. 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
Video: 1 Vp-p, 75 ohms
S-video: Y: 1 Vp-p, 75 ohms
C: 0.286 Vp-p, 75 ohms
Outputs
Video: 1 Vp-p, 75 ohms
S-video: Y: 1 Vp-p, 75 ohms
C: 0.286 Vp-p, 75 ohms
General
Power requirements 120 V AC, 60 Hz
Power consumption 300 W (US model)
375 VA (Canadian model)
AC outlets 2 switched, 120 W/1A
Dimensions 430 ×161 ×401 mm
including projecting parts
and controls
Mass (Approx.) 16.0 kg
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
Audio/video/control S connecting cord (1)
Control S connecting cord (1)
Remote commander RM-PP505L (1)
R6 (size-AA) batteries (2)
Design and specifications are subject to change
without notice.

3
STR-DE1075
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
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 COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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 PUB-
LISHED BY SONY.
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 thevoltagedrop acrossaresistor bymeans ofaVOM
or battery-operatedAC 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2VAC range are suitable. (See Fig.A)
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Case ................................................................................. 7
3-3. S-VIDEO board, VIDEO Board, Tuner......................... 7
3-4. VIDEO AU Board ........................................................... 8
3-5. DIGITAL Board .............................................................. 8
3-6. MAIN Board ................................................................... 9
4. TEST MODE.............................................................. 10
5. ELECTRICAL ADJUSTMENT............................ 11
6. DIAGRAMS
6-1. Block Diagram – TUNER/VIDEO INPUT Section –... 13
6-2. Block Diagram – AUDIO DSP Section –...................... 14
6-3. Block Diagram – AUDIO CONTROL Section – .......... 15
6-4. Block Diagram – POWERAMP Section – ................... 16
6-5. Block Diagram
– DISPLAY/KEY CONTROL Section –........................ 17
6-6. Block Diagram – POWER SUPPLY Section – ............. 18
6-7. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 19
6-8. Schematic Diagram – DIGITAL Board (1/5) –............. 21
6-9. Schematic Diagram – DIGITAL Board (2/5) –............. 22
6-10. Schematic Diagram – DIGITAL Board (3/5) – ............. 23
6-11. Schematic Diagram – DIGITAL Board (4/5) – ............. 24
6-12. Schematic Diagram – DIGITAL Board (5/5) – ............. 25
6-13. Printed Wiring Board
– DIGITAL Board (Component Side) – ......................... 26
6-14. Printed Wiring Board
– DIGITAL Board (Conductor Side) –........................... 27
6-15. Printed Wiring Board – VIDEO Board –....................... 28
6-16. Schematic Diagram – VIDEO Board – ......................... 29
6-17. Printed Wiring Boards
– S-VIDEO/VIDEO AU Boards – .................................. 30
6-18. Schematic Diagram
– S-VIDEO/VIDEO AU Boards – .................................. 31
6-19. Printed Wiring Board – MAIN Board – ........................ 32
6-20. Schematic Diagram – MAIN Board (1/3) – .................. 33
6-21. Schematic Diagram – MAIN Board (2/3) – .................. 34
6-22. Schematic Diagram – MAIN Board (3/3) – .................. 35
6-23. Printed Wiring Board – BIAS Board –.......................... 36
6-24. Schematic Diagram – BIAS Board –............................. 37
6-25. Printed Wiring Board – DISP Board – .......................... 38
6-26. Schematic Diagram – DISP Board – ............................. 39
6-27. Printed Wiring Boards
– H.P/JOG/POWER/SP/VIDEO 3/VOL Boards – ......... 40
6-28. Schematic Diagram
– H.P/JOG/POWER/SP/VIDEO 3/VOL Boards – ......... 41
6-29. Printed Wiring Boards
– POWER SUPPLY Section – ........................................ 42
6-30. Schematic Diagram – POWER SUPPLY Section – ...... 43
6-31. IC Pin Function Description ........................................... 49
7. EXPLODED VIEWS
7-1. Case Section .................................................................... 61
7-2. Front Panel Section ......................................................... 62
7-3. Chassis Section-1 ............................................................ 63
7-4. Chassis Section-2 ............................................................ 64
8. ELECTRICAL PARTS LIST ............................... 65
Ver 1.2

4
STR-DE1075
SERVICE POSITION
In checking the DIGITAL board, prepare jig (extension cable J-2501-208-A: 200 mm 21 core).
SECTION 1
SERVICING NOTES
MAIN board DIGITAL board
Connect jig (extension cable J-2501-208-A)
to the MAIN board (CN806, 807) and
DIGITAL board (CN1102, 1103).

5
STR-DE1075
SECTION 2
GENERAL This section is extracted from
instruction manual.
LOCATION OF CONTROLS
– Front Panel –
2ND ROOM wf (25)
6.1CH DECODING wa (29)
6.1CH DECODING indicator ql
(29)
AM eh (36)
CINEMA STUDIO EX A–C qh
(26)
DIGITAL CONCERT HALL A,
B w; (27)
Cursor buttons ( / ) ef (17,
31, 33, 34, 38, 40)
Digital Cinema Sound indicator
qk (26)
DIMMER 5(25)
DIMMER indicator 8(25)
Display qj (30)
DISPLAY 4(25)
ENTER ed (38)
EQ 0(34)
EQUALIZER wk (34)
FM ej (36)
FM MODE ek (36)
FUNCTION wg (22, 23, 36–38)
INPUT MODE wj (23)
IR receptor 6
Jog dial eg (17, 31, 33, 34, 38,
40)
LEVEL qs (33)
MASTER VOLUME wd (21, 24)
MEMORY r; (37)
MODE wh (23)
MULTI /2CH A. DIRECT wl
(24, 28)
MULTI CHANNEL DECODING
indicator qd
MUTING ws (24)
NAME qg (38)
ON SCREEN ra (8)
PHONES jack 3(24)
PRESET TUNING +/– 7(37)
SET UP qf (17, 40)
SHIFT el (37)
SOUND FIELD 2CH e; (28)
SOUND FIELD A.F.D. es (28)
SOUND FIELD MODE ea (26,
35)
SPEAKERS switch 2(24)
SURR qa (31)
TUNING +/– 9(36)
VIDEO 3 INPUT jacks rs (8)
?/1 (power) 1(16, 21, 22, 35)
•
•
wfwh wgwkeaes wle; wj
12
3qh
4 qs85 9 0qa qdqf qg qjqkql w;wa ws wd67
edrs ej ekelr; ef egeh
ra
– Rear Panel –
7
1234 5 6 8 9 0qa
qs qd qf qh
qg qj qk ql
1DIGITAL jack
2ANTENNA terminal
3CONTROL A1 IIjack
4MONITOR jack
5TV/SAT jack
6DVD/LD jack
7VIDEO 2 jack
8VIDEO 1 jack
9SPEAKERS terminal
0AUDIO OUT jack
qa INPEDANCE SELECTOR
qs MULTI CH IN 2 jack
qd MULTI CH IN 1 jack
qf PHONO jack
qg CD/SACD jack
qh MD/DAT jack
qj TAPE jack
qk 2ND ROOM jack
ql AC OUTLET

STR-DE1075
6
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-3. S-VIDEO BOARD,
VIDEO BOARD, TUNER
(Page 7)
3-2. CASE
(Page 7)
3-5. DIGITAL BOARD
(Page 8)
3-6. MAIN BOARD
(Page 9)
3-4. VIDEO AU BOARD
(Page 8)

STR-DE1075
7
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE
1 two screws (case 3TP2)
1 two screws (case 3TP2)
3 case
2
2
1
two screws (case 3TP2)
3-3. S-VIDEO BOARD, VIDEO BOARD, TUNER
2 connector
(CN306)
1 connector
(CN753)
5 S-VIDEO board,
VIDEO board
7 three screws
(BVTP3
× 8)
4 six screws
(BVTP3
× 8)
3 wire (flat type) (21 core)
(CN303)
6 wire (flat type) (15 core)
(CN1)
8 tuner

STR-DE1075
8
3-4. VIDEO AU BOARD
3-5. DIGITAL BOARD
2 two screws
(BVTP3
× 8)
3 VIDEO AU board
1 wire (flat type) (9 core)
(CN201)
3 two screws
(BVTP3
× 8)
2 connector
(CN1107)
2 connector
(CN1106)
2 connector
(CN1108)
1 wire (flat type) (29 core)
(CN1101)
6 DIGITAL board
5 two connectors
(CN1102, 1103)
4 five screws
(BVTP3
× 8)

STR-DE1075
9
3-6. MAIN BOARD
3 screw
(BVTP3
× 8)
5
3
screw
(BVTP3 × 8)
4 eight screws
(BVTP3 × 8 TYPE 2 IT-3
)
2 two screws
(BVTP3 × 8)
2 two screws
(BVTP3 × 8)
1 connector
(CN803)
1 connector
(CN802)
1 connector
(CN805)
1 connector
(CN804)
8 two screws
(BVTP3 × 8)
9 MAIN board
7 twelve screws
(transistor)
6 connector
(CN810)
6 six connectors
(CN501, 551, 451, 401, 601, 651)

10
STR-DE1075 SECTION 4
TEST MODE
Factory Set Mode
All preset contents are reset to the default setting.
Procedure:
While pressing the [SET UP] and [DIMMER] buttons, press the
?/1 button to turn on the main power. The message “TUNER
FACTORY PRESET” appears and the present contents are reset
to the default values.
All Clear Mode
All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
While pressing the [A.F.D.] and [SOUND FIELD MODE] buttons,
press the ?/1 button to turn on the main power. The message
“MEMORY CLEAREDd” appears and the memories are reset to
the default values.
Sound Field Clear Mode
The preset sound field is cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
While pressing the [SOUND FIELD MODE] button, press the
?/1 button to turn on the main power. The message “S.F
Initialize” appears and initialization is performed.
Fluorescent IndicatorTubeTest Mode
All fluorescent segments are tested.When this test is activated, all
segments turn on at the same time, then each segment turns on one
after another.
Procedure:
1. While pressing the [A.F.D.] and [DIMMER] buttons, press
the ?/1 button to turn on the main power.
2. All segments turn on at the same time, then each segment turns
on press the [A.F.D.] button.
Demonstration Mode
Procedure:
While pressing the [SET UP] button simultaneously, press the
?/1 button to turn on the main power.The set enters the DEMO
mode.
Wait a while, then the demonstration starts. If the ?/1 button is
pressed often the demonstration has started, the power is turned
off, and the demonstration resumes if the ?/1 button is pressed
again.
AM Channel Step 9 kHz/10 kHz Selection Mode
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Set the FUNCTION to AM. Press the ?/1 button to turn off
the main power.
2. While depressing the [PRESET TUNING +] button, press the
?/1 button to turn on the main power.
3. Either the message “AM 9kHz Step” or “AM 10kHz Step”
appears. Select the desired step.
Version Mode
When this mode is used, the microprocessor version number is
displayed.
Procedure:
Press three buttons of [SHIFT], [SOUND FIELD MODE] and
[TUNING --] simultaneously. The microprocessor version number
appears.
DSPTest Mode
This test is conducted to check if the DSP functions normally.
Procedure:
1. While pressing the [DISPLAY]and [TUNING +] buttons, press
the I/1button to turn on the main power.
2. If the DSP is normal, the message “RWS 1:000 2:000 SYNC”
appears.
3. If the DSP is abnormal, characters other than 0 appears at the
000 part of the message.
Note: RWS characters of the message correspond to the digits of 000.
RW means read/write from the system controller (IC1703) to the
DSP, and S means the communication between DSP and S-RAM
(IC1502, IC1602). For example, if the writing of the system
controller failed, 0*0 (* is a character other than 0) appears. Also,
1 and 2 indicates DSP1 (IC1501) and DSP2 (IC1601), and 1:000
and 2:000 show the test results of DSP1 and DSP2 respectively.
Ver 1.2

11
STR-DE1075
SECTION 5
ELECTRICAL ADJUSTMENT
OSD Adjustment
Connection
Procedure:
1. Short the CN306 pin 4on the VIDEO board to the GND.
2. Connect a frequency counter to the CN306 pin 2on the
VIDEO board.
3. Press the I/1button to turn on the main power.
4. Press the [SET UP] button.
5. Press the [<] or [>] button to display “OSD H.POSITION”.
8. Adjust the CT302 so that the frequency counter reading is
3.57954 MHz.
9. Press the I/1button to turn off the main power.
10. Connect a frequency counter to the CN306 pin 1on the
VIDEO board.
11. Press the I/1button to turn on the main power.
12. Press the [SET UP] button.
13. Press the [>] button to display “OSD V.POSITION”.
14. Adjust the CT303 so that the frequency counter reading is 7.20
MHz.
Adjustment and Connection Loacation:
VIDEO board
CN306 pin
1 or pin 2
+
–
frequency counte
r
IC304
IC310
CT303
CT302 CN306
1
4
Ver 1.2
– VIDEO BOARD (Component Side) –

12
STR-DBE1075
MEMO

STR-DE1075
1313
7
9
3
5
13
V3
V2. IN
TV
LD
V1. IN
10
4
14
6
2
15
1
SW2
SW3
SW1
SW4
SW5
V1.
OUT
M.
OUT
7
9
3
5
13
V3
V2. IN
TV
LD
V1. IN
10
4
14
6
2
15
1
SW2
SW3
SW1
SW4
SW5
V1.
OUT
M.
OUT
15
13
9
11
3
5
7
1
2
14
10
4
6
ANALOG
SWITCH
SERIAL
INPUT
CONTROL
BUFFER
Q304,
Q305
D304
D303
D751
D750
X302
14MHz
B
(Page 17) DATA, CLK
FM
AM
10L CH
12R CH
1
CE
13
MUTING
2
DATA
3
CLOCK
14
TUNED
4
DO
15
STEREO
S LAT MUTING DATA CLK TUNED DO STEREO
FM/AM
TUNER UNIT
8YOUT
6COUT
7VOUT
4
CIN
2
YIN
3
VIN
VIDEO BUFFER
IC305
27 YOUT
26 COUT
25 VOUT
15 EXD
16 XD
2
CIN
1
YIN
22
SCLK
23
SIN
24
CS
3
VIN
8EXS
OSD DRIVER
IC307
CLOCK
IC304
89 1110
CLK
DATA
LAT
105
106
107
29 VIDEO SW1
30 VIDEO SW2
31 VIDEO SW3
32 VIDEO SW4
SYSTEM
CONTROLLER
IC1703
(1/6)
J298 (1/2)
VIDEO 3
INPUT
VIDEO
TV/SAT IN VIDEO
DVD/LD IN VIDEO
IN VIDEO
OUT VIDEO
VIDEO 2
J305
J304
VIDEO 1
IN VIDEO
OUT VIDEO
J752 (2/2)
J750 (1/2)
J750 (2/2)
J752 (1/2)
C
Y
C
Y
C
Y
C
Y
C
Y
J751
J302
VIDEO SELECT
IC308
Y SWITCH
IC752
C SWITCH
IC750
A(Page 14)
TU L OUT
FM 75Ω
COAXIAL
AM
R-CH
• SIGNAL PATH
: TUNER
TV/SAT
S-VIDEO IN
DVD/LD
S-VIDEO IN
VIDEO 1
S-VIDEO IN
MONITOR
S-VIDEO OUT
MONITOR
OUT VIDEO
V1. OUT
V1. IN
V2. IN
V2. OUT
TV
LD
V3
M. OUT
SW5
SW1
SW2
SW3
SW4
BUFFER
: VIDEO IN
LEVEL SHIFT
IC310
VIDEO 1
S-VIDEO OUT
L. P. F.
FL302
LEVEL
SHIFT
IC312
20 TUNER MUTE
25 TUNER STEREO
19 TUNER AUTO STOP
23 TUNER DATA IN
40 TUNER LAT
MUTING
STEREO
TUNED
DO
SLAT
CT302
OSD
CT303
OSD
• R-ch is omitted due to same as L-ch.
6-1. BLOCK DIAGRAM – TUNER/VIDEO INPUT Section –
SECTION 6
DIAGRAMS
Ver 1.2

STR-DE1075
1414
CONTROL
CONTROL
CONTROL
108, 107, 105 –102,
99, 98, 80 –77,
75 –72
96, 97, 109, 110, 112,
64 –66, 82 –85,
92 –95
7 –10, 13 –16,
29 –32, 35 –38
5 –1, 44 –42,
27 –24, 21 –18
S-RAM
IC1502
617
CS WE
4445
CSO WEO
43, 44, 51, 32, 31,
22 –20, 52, 53, 56,
79, 57, 58, 67, 68
105, 50, 42, 41, 34,
69, 70, 59, 77, 78, 95,
86, 122, 114, 115, 106
7 –10, 13 –16,
29 –32, 35 –38
5 –1, 44 –42,
27 –24, 21 –18
S-RAM
IC1602
617
CS WE
8485
CSO WEO
DATA
DEMODULATOR
LOCK
DETECT
TIMING
MICON INTERFACE
CLOCK
INPUT
IC1405
J1401
J202
AUDIO OUT
L
L
L
AUDIO IN
J298 (2/2)
L
VIDEO 2
VIDEO 1
J201
PHONO IN L
L
CD/SACD IN
J302
IN L
L
J303 (1/2)
L
L
DAT/MD
J201
L
L
L
J303 (2/2)
R-CH
RY301
RELAY
DRIVE
Q301
SIGNAL-END
DEFERENTIAL
CONVERTER
DIGITAL ∑
MODULATOR
SERIAL I/O
INTERFACE
CLOCK/
TIMING CONTROL RESET
/POWER CONTROL
6
DIGITAL AUDIO INTERFACE RECEIVER
IC1408
SCLK SDAT SLAT
SDAT SLAT SCLK
SDAT SLAT SCLK
J
(Page 17)
SCLK, SDAT, SLAT
K
(Page 15)
S MUTE
I
(Page 15)
LRCKO
H
(Page 15)
SDO4
G
(Page 15)
BCKO,
SCKOUT
F
(Page 15)
SDO1,
SDO2,
SDO3
D0 –D15 A0 –A15D0 –D15 A0 –A15
D0 –D15 A0 –A15 D16 –D31 A0 –A15
L
R
2ND ROOM
OUT
AUDIO SELECT
IC105
IN
OUT
TAPE
E
(Page 15)
2NDL
A
(Page 13)
TU L OUT 26
23
25
27
22
17
1514 16
3
4
2
8
6
11
10
1514 16
12
AUDIO SELECT
IC102
VIDEO SELECT
IC201
25
24
22
21
26
27
19
17
1514 16
3
4
5
6
9
14 2
7
10
11
12
Q1402
Q1401
B
A
36 37 38 35
47
CKSEK1
48
CKSEL1
DI CE CLK DO X MODE
XMODE
3DIN0 16
DATAO
34
ERROR
13
CKOUT
14
BCK
15
LRCK
17
XSTATE
20
XMCK
22
XIN
24
AUDIO
2635
71
X1401
24.576MHz
OSC
IC1410 25
1
CLOCK SELECT
IC1407
D1702
D1703
HCLK
HDIN
81
HACN2
47
EEROR
82
HCS2
HDOUT2
96
2EXLOCK
79
PM2
78
BST2
80
XRST2
67
DIR ERROR ANALOG DIGITAL
121
SYSTEM MUTE
116
104103102
91 ADC:RST
37 OPT A
36 OPT B
75 DI
74 CE
73 CLK
76 DO
71 XMODE
72 CKSEL1
88
HACN1
89
XRST1
85
HCS1
35
HDOUT1
83
GB9
84
BST1
90
PM1
7
2ND AUDIO RY
70
DATA0
69
XSTATE
A
B
DI
CE
CLK
DO
XMODE
CKSEL1
SYSTEM
CONTROLLER
IC1703 (2/6)
A/D CONVERTER
IC1101
15
13
LRCK
16
SYCLK
1
D
OUT
LIN
6
RSTB
14
BCK
18 SDI1
15 LRCKI1
30 SDI2
17 BCKI1
29 BCKI2
PM
9
MCLK1
12
MCLK2
69
GP8
68
GP9
56
BST
36
HCS
35
HDOUT
32
HACN
2
XRST
22
KFSIO
113
AUDIO DSP1
IC1501 AUDIO DSP2
IC1601
23SDO1
24SDO2
25SDO3
26SDO4
19LCKO
20BCKO
34HCLK
33HDIN
67GP10
75 HCLK
63 LRCKO
74 HDIN
111 G P 7
132 G P 0
27 SDI1
28 SDI2
35 SDI3
39 SDI4
29 LRCKI1
38 BCKI1
76
HCS
82
HDOUT
83
HACN GP3 EXLOCK PM
141
BST
8
XRST
131
GP1
62
KFSIO
136120 140
X1601
13.5MHz
64BCKO
10SCKOUT
60SDO1
61SDO2
25SDO3
MCLK1 144
MCLK2 139
26SDO4
BCKO
SCKOUT
SDO1
SDO2
SDO3
•SIGNAL PATH
•R-CH is omitted due to same as L-CH.
: TUNER
: AUDIO IN (ANALOG)
: AUDIO IN (DIGITAL)
AB
X1501
13.5MHz
D0 –D15 A0 –A15
EQ AMP
IC104
BUFFER
IC103 Q
(Page 15)
2CHL
TV/SAT
AUDIO IN
DVD/LD
AUDIO IN
OUT
AUDIO IN
AUDIO OUT
VIDEO 3
INPUT
AUDIO
DIGITAL OPTICAL
RECEIVER
IC1401
DIGITAL OPTICAL
RECEIVER
IC1402
DIGITAL OPTICAL
RECEIVER
IC1403
DVD/LD
OPTICAL IN
TV/SAT
OPTICAL IN
MD/DAT
OPTICAL IN
DVD/LD
COAXIAL IN
MD/DAT
OPTICAL OUT
DIGITAL OPTICAL
TRANSCEIVER
IC1404
DIGITAL SELECT
IC1406
BUFFER
IC1102
28 LRCKI2
59 EXLOCK
MUTING
SWITCH
Q1705
COUNTER
IC1409
MUTING
SWITCH
Q1703
MUTING
SWITCH
Q1704
6-2. BLOCK DIAGRAM –AUDIO DSP Section –
Ver 1.1

STR-DE1075
1515
MODE CONTROL
INTERFACE
SERIAL INPUT
INTERFACE
MULT-FUNCTION
X8 OVER SAMPLING
DIGITAL FILTER
D/A
CONVERTER
LPF
AMP
LPF
AMP
LPF
AMP
LPF
AMP
MUTING
Q651
MUTING
Q601
MUTING
Q501
MUTING
Q451
MUTING
Q701
F
(Page 14)
SDO1,
SDO2,
SDO3
G
(Page 14)
BCKO,
SCKOUT
I
(Page 14) LRCKO
H
(Page 14) SDO4
K
(Page 14) S MUTE
TRIM
LEVEL SHIFT
CIRCUIT
CENTER
SUB WOOFER
CENTER
SURROUND BACK
MULTI CH IN1
E
(Page 14) 2NDL
J307
SUB WOOFER
MUTING
DRIVE
Q813
P(Page 17)
CLK, DATA, LAT
R(Page 17)
CLK, DATA, LAT
L(Page 16)
L OUT
LEVEL SHIFT
CIRCUIT
O(Page 16)
SL OUT
LEVEL SHIFT
CIRCUIT
J701
LEVEL SHIFT
CIRCUIT
M(Page 16)
C OUT
N(Page 16)
SB OUT
RY807
RELAY
DRIVE
Q825
J305
J304
46
45
47
40
38
DATA2
DATA1
DATA3
BCK
SCKI
41 LRCK
BCKO
SCKOUT
SDO2
SDO1
SDO3
34
MDI
35
MC
36
ML
37
RST
33
MDO
ML RST MDO
14
12
10
9
VOUT1
VOUT3
VOUT5
VOUT6
2 DATA
1 BCK
16 SCK
3 LRCK
15
ML
14
MC
13
MD
7VO L
D/A
CONVERTER
IC1202
BCKO
SCKOUT
AUDIO SELECT
IC101
26 5.1L
35 5.1SL
39 5.1C
31 5.1SW
4 6.0
27 6.1L
36 6.1SL
40 6.1C
3 6.1SB
32 6.1SW
41 2NDL
37COUT
24
LOUT
6SBOUT
30 D/ASW
25
34 D/ASL
29SWOUT
33SLOUT
21
CLK
22
DATA
23
LAT
38 D/AC
5 D/ASB
7IN 5
OUT
3
4
TRIM
11
DATA
12
LAT
10
CLK
DATA LAT CLK
14 IN 16
OUT
18
TRIM
17
TRIM
11
DATA
12
LAT
10
CLK
7IN 5
OUT
3
TRIM
4
TRIM
DATA LAT CLK
11
DATA
12
LAT
10
CLK
DATA LAT CLK
14 IN 16
18
17
OUT
TRIM
TRIM
14 IN 16
OUT
18
TRIM
17
TRIM
11
DATA
12
LAT
10
CLK
DATA LAT CLK
93 DA1LAT
92 DACINT
108 DA1DO
95 DACDI
94 DACCLK
119 DA2 LAT
ML
RST
MDO
MDI
MCI
4WOOFER RY
SYSTEM
CONTROLLER
IC1703 (3/6)
CLK DATA LAT
•SIGNAL PATH
•R-CH is omitted due to same as L-CH.
: TUNER
: AUDIO IN (ANALOG)
: AUDUI IN (DIGITAL)
MDI
MCI
FRONT L
MULTI CH IN2
SURROUND L
Q
(Page 14) 2CHL 28 2CHL
FRONT L
SURROUND L
LINE AMP
IC1221
LINE AMP
IC1241
LINE AMP
IC1261 (2/2)
LINE AMP
IC1261 (1/2)
11
VOUT4
13
VOUT2
R-CH
R-CH
D/AL
LINE AMP
IC1281
BUFFER
IC602 (1/2)
BUFFER
IC402
BUFFER
IC602 (2/2)
BUFFER
IC502
BUFFER
IC702
ELECTRICAL
VOLUME
IC401
ELECTRICAL
VOLUME
IC601
ELECTRICAL
VOLUME
IC501
ELECTRICAL
VOLUME
IC701
D/A CONVERTER
IC1201
AUDIO OUT
SUB WOOFER
6-3. BLOCK DIAGRAM –AUDIO CONTROL Section –
Ver 1.1

STR-DE1075
1616
+
+
–
–
TM501
PRE
DRIVE DRIVE
BIAS
CIRCUIT
REG/PROTECTOR
BIAS
Q440
BOOSTER
Q402
BOOSTER
Q403
L6
1 13 14 15
3
2
5
B+
B–
B–
POWER AMP
IC403
POWER AMP
IC603
(Page 15) L OUT INPUT –VEOUT
+VEOUT
NF
PRE
DRIVE DRIVE
BIAS
Q640
BOOSTER
Q602
BOOSTER
Q603
M8
11
12
9
(Page 15) C OUT INPUT –VEOUT
+VEOUT
PRE
DRIVE DRIVE
BIAS
Q690
BOOSTER
Q652
BOOSTER
Q653
N6
3
2
(Page 15) SB OUT INPUT –VEOUT
+VEOUT
NF
NF
VCC VCC VEE
PRE
DRIVE DRIVE
BIAS
CIRCUIT
REG/PROTECTOR
BIAS
Q540
BOOSTER
Q502
BOOSTER
Q503
O8
1
13 14
11
12
9
B+ B–
POWER AMP
IC503
EEPROM
IC1701
SYSTEM CONTROLLER
IC1703 (4/6)
(Page 15) SL OUT INPUT –VEOUT
+VEOUT
NF
VCC VCC
VCC VCC VEE
VEE
13 14
15
151
5
BIAS
CIRCUIT
REG/PROTECTOR
OVER LOAD
DETECTOR
IC803,
Q801, 804
AF POWER
LIMITER
Q406
CURRENT
DETECT
Q404, 405
AF POWER
LIMITER
Q606
CURRENT
DETECT
Q604, 605
AF POWER
LIMITER
Q656
CURRENT
DETECT
Q654, 655
AF POWER
LIMITER
Q506
CURRENT
DETECT
Q504, 505
MUTING
DRIVE
Q811, 812
5 99
6100
117 5
1
118
2
3
6
10
SDA
SCL
EEPROM SDA
EEPROM SCL
AC MUTE REAR RY
H. P IN
PROTECTOR
SP A RY
H/P RY
CENTER RY
SB RY
RELAY
DRIVE
Q823
RY806
R-CH
RELAY
DRIVE
Q808
RY802
RELAY
DRIVE
Q809
RY803
RELAY
DRIVE
Q807
RY801
D803
D802
PHONES
CENTER
SURROUND BACK
L
R
J749
+
+
–
–
TM502
–
–
+
+
R-CH
R-CH
SURROUND
L
R
BOOSTER
Q503
SWITCH
Q806
AF POWER
PROTECTOR
Q802, 803,
Q805
FRONT
SPEAKERS
IMPEDANCE
USE 4-6Ω
–1
•R-CH is omitted due to same as L-CH.
•SIGNAL PATH
: TUNER
SPEAKERS
IMPEDANCE
USE 4-6Ω
–2
6-4. BLOCK DIAGRAM –POWER AMP Section –
Ver 1.1

STR-DE1075
1717
OUTPUT
CIRCUIT
CONTROL S I/O SWITCH
IC751
O2-2 OUTPUT
CIRCUIT
INPUT
CIRCUIT
TV/SAT
CTRL S
STATUS IN
J754
VIDEO 1
CTRL S
OUT
J756
DVD/LD
CTRL S
OUT
J755
MONITOR
CTRL S
IN
J753
INH
BUFFER
Q752, 753
BUFFER
Q1702
REMOTE
CONTROL
RECEIVER
IC1604
I/O BUFFER
Q1701
D1701
CONTROL A1 II
J303
Q810
S1705
SHIFT
REGISTER
PARALLEL
DATA
OUTPUT
1 –7, 9, 10, 12 –15, 20 –24
D1601 –1605,
D1611 –1613,
D1615 –1619,
D1621 –1625
LED DRIVE
IC1602
1, 70 –37 2 –23
FL1601
FLUORESCENT
INDICATOR
TUBE
F1
F2
HVO25 –HVO59 HVO24 –HVO3
P01 –P35
G1 –G22
FL DISPLAY DRIVE
IC1601
S1701
ON
OFF
SPEAKERS
S1681 –1685,
S1702 –1704
S1651 –1658
S1661 –1668
S1671 –1677
S1691 –1693,
S1801
A
B
RV1901
(JOG DIAL)
A
BFUNCTION
RV1801
A
B
RV1802
SYSTEM CONTROLLER
IC1703 (5/6)
134
AD3
135
AD4
136
AD5
11C. JOG
12C. JOG
13F. JOG
14F. JOG
15V. JOG
16V. JOG
66 SIRCS
41 M STSTUS
64 MBUS DVD
65 BUS VIDEO
63 MBUS TV
111CLK
112DIN
113LAT
114CLR
62POWER
17SP. SW
132
AD1
133
AD2
86 A1 IN
87 A1 OUT
22
CLK
21
DATA
24
F. SW LAT
115
VOL IC LAT
39LED CR
38LED CE
LED CLR
LED LAT 19 CLR
18 STB
17 CLK
16 DATA
LED2
LED3
LED4
LED1
30 CLK
28 DIN
31 LAT
32 CL
FL4
FL1
FL3
FL2
FL4
FL1
FL3
FL2
11 O2-1
10
13 IN1
6
O3-1
7
O3-2
4
2
IN3
OUT1
BUFFER
Q750, 751
B
(Page 13) DATA, CLK
R
(Page 15) CLK, DATA, LAT
P
(Page 15) CLK, DATA, LAT
J
(Page 14) SCLK, SDAT, SLAT CLK
DATA
FUNC LAT
VOL LAT
CLK
DATA
LAT
CLK
DATA
FUNC LAT
VOL LAT
CLK
DATA
LAT
CLK
DATA
LED CLK
LED DATA
57 X1
58 X2
X1701
16.5MHz
LEVEL SHIFT
IC805
LEVEL SHIFT
IC804
LEVEL SHIFT
IC1610
LEVEL SHIFT
IC1603
MASTER
VOLUME
I / 1
6-5. BLOCK DIAGRAM –DISPLAY/KEY CONTROL Section –
Ver 1.1

STR-DE1075
1818
+5V
REGULATOR
Q824
+5V
+12V
REGULATOR
IC1301
+12V
(TUNER UNIT)
D POWER
SWITCH
Q1813, 1814
+3.3V
REGULATOR
IC1302
+3.3V
(TUNER UNIT)
+5V
REGULATOR
IC1808
+5V
D/A, A/D CONVERTER
(IC1201, 1202, 1503) B+
+5V
REGULATOR
IC1801
+5V
(VIDEO)
D POWER
SWITCH
Q1811, 1812
+5V
REGULATOR
IC1802
+5V
REGULATOR
IC1807
+3.3V
REGULATOR
IC1806
+5V
DIGTAL OPITICAL
RECEIVER/TRANSCEIVER
(IC1401 –1404) B+
+2.6V
REGULATOR
IC1805
D+2.6V
D+3.3V
D1803
D1801
+3.3V
REGULATOR
IC1804
+5V
REGULATOR
IC1803
STBY +5V RECT
D54 –57
D58
D52
D53
T2
POWER
TRANSFORMER
SYSTEM
CONTROLLER
IC1703
(6/6)
AC POWER
DETECT
Q54
–5V
REGULATOR
Q902
V POWER
SWITCH
Q904, 905
–5V
(VIDEO)
F1
F2
FLUORESCENT INDICATOR TUBE
(FL1601)
+36V
FL DISPLAY DRIVE
(IC1601) B+
+36V
REGULATOR
Q903
RECT
D912, 913
–15V
REGULATOR
IC802
–15V
+15V
+15V
REGULATOR
IC801
+24V
(RELAY B+)
B+
B–
F905
F906
-2
-1
8Ω
4Ω
IMPEDANCE
SELECTOR
S901
T901
POWER
TRANSFORMER
MD2 MD0 SIN1 SOT1 RESET GND VDD
STBY +3.3V
52
MD2
54
MD0
110
SIN1
109
SOT1
42D POWER
43V POWER
55RSTX
49SUB T. PORT
60STOP
18POWER RY
(FOR CHECK)
CN1107
POWER AMP
(IC403, 503, 603)
MD2 MD0
SIN1
SOT1
RSTX
B+ SWITCH
Q1801, 1802
B+ SWITCH
Q1803, 1804
B+ SWITCH
Q1810
+5V
SYSTEM CONTROLLER
(IC1703) B+
RESET SIGNAL
GENERATOR
IC1702
B+ SWITCH
Q52, 53
RECT
D903 –906
RECT
D908
F904
F903
RECT
D914
F1
RELAY
DRIVE
Q51
RY1
AC IN
F2
AC OUTLET
CNJ1
D+5V
6-6. BLOCK DIAGRAM –POWER SUPPLY Section –
Ver 1.1

19
STR-DE1075
6-7. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•2: nonflammable resistor.
•C: panel designation.
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthepattern faceside seenfrom
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Indication of transistor
C
BThese are omitted. E
Q
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
•A: B+ Line.
•B: B–Line.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark :TUNER
•Voltages aretakenwith aVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
•Circled numbers refer to waveforms.
•Signal path.
F:TUNER
F: AUDIO IN (ANALOG)
c: AUDIO IN (DIGITAL)
E:VIDEO IN
Note:
The components identi-
fied by mark 0or dotted
linewith mark0are criti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposants identifiéspar
une marque 0sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.

20
STR-DE1075
• Circuit Boards Location
VIDEO 3 board
H.P board
POWER board
JOG board
DC 2 board SP board
VIDEO board
S-VIDEO board
DIGITAL board
BIAS board
VOL board
DISP board
AC board
DC 1 board
MAIN board
VIDEO AU board
TUNER