Sony STR-K790 Support Question
Sony STR-K790 Support Question
Find answers below for this question about Sony STR-K790 - Lifier.Need a Sony STR-K790 manual? We have 1 online manual for this item!
Question posted by albertsemarnes on May 7th, 2020
Fault Message
why does my system have a "protect" message when I switch it on
Current Answers
Answer #1: Posted by techyagent on May 7th, 2020 3:49 AM
techyagent
Member since:
June 17th, 2014 Points: 4,799,770
Member since:
June 17th, 2014 Points: 4,799,770
Ensure the top of the home audio device has proper ventilation to keep it from overheating. ... If the impedance of any of the speakers is below the rated impedance range indicated on the rear of the home audio device next to the speaker connections, the home audio device may enter the PROTECT mode
Please check this link below for reference:-
https://www.sony.com/electronics/support/articles/00025095
Thanks
Techygirl
Related Sony STR-K790 Manual Pages
Service Manual - Page 1
... 135 W
1)Measured under license from Dolby Laboratories.
Depending on next page - SPECIFICATIONS
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION: (Models of area code US only) ...Corporation
Home Audio Division Published by Sony Techno Create Corporation SERVICE MANUAL
Ver. 1.1 2007.03
STR-K790
US Model Canadian Model
AEP Model UK Model
• STR-K790 is the...
Service Manual - Page 2
... COMPONENT WARNING!!
LEAKAGE TEST The AC leakage from all other exposed metal parts for this job.
3. A battery-operated AC milliammeter.
A. Using an AC voltmeter to change without notice.
STR-K790
Power...15 µF
1.5 kΩ
AC voltmeter (0.75 V)
Earth Ground
Fig. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS ...
Service Manual - Page 3
... - HDMI SW Board,
HDMI BRIDGE Board (AEP, UK only 24 4-12. Schematic Diagram - Printed Wiring Boards - Schematic Diagram - POWER Board, DCAC Board,
HEADPHONE Board 34
5. STR-K790
About area codes
The area code of the receiver you purchased is shown on the lower right portion of area code AA only".
MODEL IDENTIFICATION...
Service Manual - Page 4
..., MUSIC
L A.F.D. Press to activate the Auto Calibration function. Connects to playback. STR-K790
Receiver
Front panel
1 234
?/1
VIDEO 1 IN/ PORTABLE AUDIO IN/
AUTO CAL MIC
DIMMER
SLEEP
2CH
A.F.D.
Press to adjust the volume level... for the Auto Calibration function.
- The current status of the selected component or a list of selectable items appears here.
Press to select 2CH STEREO...
Service Manual - Page 5
...Surround Left Surround Right Surround (monaural or the surround components obtained by Pro Logic processing) Example: Recording format (...MEMORY
Function
Lights up when the disc being played back. Lights up when audio signal is actually being reproduced. Note "RDS" appears for DTS format signals....models of area code AEP, UK only. STR-K790
About the indicators on presetting radio stations. ...
Service Manual - Page 6
...a TV or a projector. STR-K790
Rear panel US, Canadian models
12
3
4
DIGITAL OPTICAL
VIDEO 2/ BD IN COAXIAL DVD IN
ANTENNA AM
L
R AUDIO IN AUDIO IN AUDIO IN SA-CD/CD TV SAT...The
COAXIAL jack
provides a better
COAXIAL IN quality of loud
jack
sound. AEP, UK models
12
C AUDIO INPUT section
AUDIO IN Connects to a DVD
IN jack
player, etc.
Connects to a DVD player, etc.
Red (R)...
Service Manual - Page 7
... AV ?/1 switch changes automatically each time you do not intend to use the supplied remote RM-AAU013 to operate the receiver and to control the Sony audio/video components that the ...or off the Sony audio/video components that the remote is assigned to their factory settings. When you press any of time, remove the batteries to operate.
STR-K790
Inserting batteries into the ...
Service Manual - Page 8
...STR-K790
Name
Function
D 2CH
Press to perform menu operations.
G D.TUNING
Press to activate the
TV's muting function.
Press MUTING and TV (O)
at the same time to activate the buttons with components... starts
recording with orange printing. audio settings during recording), or multiple ...Press to select preset TV channels. disc protection), recorder (e.g. X
Press to enter the...
Service Manual - Page 9
... track numbers over 10 of the VCR, satellite tuner or CD player or to select track number 10.
STR-K790
Name
Q RETURN/ EXIT O
R V/v/B/b
S DISPLAY
T -/->10/x CLEAR
Function
Press to return to the...also to clear a mistake when you press the incorrect numeric buttons.
Therefore, depending on the component, the above explanation is not available for DVD MENU or MENU. Press to enter the ...
Service Manual - Page 10
... can be swapped to turn on one after another in the same order. Procedure:
1.
Either the message "9 k STEP" or "10 kSTEP" appears. "REST 08" appears.
2. Procedure:
1.
ALL"...appears and switch off the set . KEY CHECK MODE Button check Procedure:
1. MHz
RDS ST MONO
3. Set the FUNCTION to clients upon completion of the amplifier is displayed. STR-K790
SECTION ...
Service Manual - Page 11
... R1530 x = 2 → D1502 problem x = 3 → D1503 problem
2. Turn MASTER VOLUME jog, there will be test tone sound output from front left speaker of test tone)
STR-K790
11 "AD[]-[]xxx" xxx = 0 to start , below display will change accordingly. "DCAC[]FTM" appears. When power off : Press the three buttons MUSIC + DISPLAY + ?/1 . DCAC board...
Service Manual - Page 13
...
3.5 Vp-p
41.6 ns 1 V/DIV, 20 ns/DIV
3 IC1301 ws (XIN)
4.2 Vp-p
STR-K790
81.4 ns 1 V/DIV, 40 ns/DIV
4.2 Vp-p
13
13
Line. • Voltages and ...component side.
• a : Through hole.
• f : internal component.
•
: Pattern from the parts face are omitted.
• Circuit Boards Location STANDBY board
POWER board DCAC board
HEADPHONE board DISPLAY board
STR-K790...
Service Manual - Page 15
...AUDIO +7V
AUDIO +5V
AUDIO -7V
Q851,852 -B
SWITCH
D811
Q801 -20V REG
IC1902
3
+10V REG
1
IC821
1
+7V REG
3
IC1001
3
+5V REG
1
IC822
3
-7V REG
2
R803 D920-923
AEP,UK
HDMI +3.3V
IC5003
3
+3.3V REG
1
T901
B MAIN
SECTION
(Page 15)
AUTO CAL MIC
IC2000 5 AMP 1
Q2001,2002
DC
+7V
CONTROL
68
38
Q881-883 PROTECT SWITCH... DRIVE
RY901
STR-K790
15
15 BLOCK DIAGRAM -
Service Manual - Page 25
...Q601 Q602 Q603 Q604
Location
H-8 G-8 G-8 G-7 E-13 G-11 H-11 H-11 H-11 G-12 G-12 G-11 G-9 H-9 H-9 H-10
Ref.
STR-K790
Ver. 1.1
1 A
B
C
DCAC
E BOARD
CN2001 (4pin-6pin) (Page 33)
D DIGITAL
F BOARD
CNS501 (Page 17)
E
DIGITAL...3
4
5
6
7
8
9
10
11
12
13
14
15
SA-CD/CD AUDIO IN
J400 TV AUDIO IN
SAT AUDIO IN
MAIN BOARD
AEP,UK
JW853
CC54
C452 C402
R454
TP1
DCAC
BOARD
B CN2001 (7pin...
Service Manual - Page 27
STR-K790
DCAC
B BOARD
CN2001 (7pin to 9pin)
(Page 34)
J400
SAT AUDIO IN
CNP733 3P
J400 6P
TV AUDIO IN SA-CD/CD AUDIO IN
CC01 100P
R401 1k
CC51 100P
CC02 100P CC52 100P
CC03 100P CC53 ...100P
CC04 100P CC54 100P
R451 1k R402 1k
R452 1k R403 1k
R453 1k R404 1k
R454 1k
CNP501 15P
STR-K790
F
...
Service Manual - Page 33
4-20. STR-K790
1
2
3
A POWER BOARD
B
C
S152
D
JW123 JW122 JW121
E
F
G
JW124 JW126 JW125
4
5
6
7
8
9
CNP152
1
3
JW157
S114 DIMMER
R135 S115
R136
S116
SLEEP
2CH
K
DISPLAY BOARD CN101 (Page 31)
10
11
12
13
14
15
DCAC BOARD
J2000 VIDEO 1 IN/ PORTABLE AUDIO IN/ AUTO CAL MIC
JW2013
D2013 R2000
JW2004 Q2002
Q2001
C2001 C2002
D2014 C2013...
Service Manual - Page 39
... input terminal O EEPROM clock signal output terminal I Input selector Encoder (A) signal input I Vacs control input
STR-K790 39 Ground terminal I RDS signal detect input (AEP, UK only) I MODEL select input I Input selector...AVCC AVRH AVSS ADCC A/D1 A/D2 VERSION VSS TUNER SD MODEL VAX CTRL
I/O
Description
I Audio data signal input from DIR
I GP9 signal input from DSP
O BST signal output to ...
Service Manual - Page 42
...Les composants identifiés par une marque 0 sont critiques pour la sécurité.
No.
6 6 7
Part No. STR-K790
SECTION 5 EXPLODED VIEWS
NOTE: • -XX and -X mean standardized parts, so they are critical for routine service. Some delay...;cifié. FRONT PANEL SECTION
The components identified by mark 0 or dotted line with part number specified. No.
1 2 3 4 4
Part No.
Service Manual - Page 44
...mark 0 or dotted line with part number specified. The components identified by reference number, please include the board name. No. Some delay ...>
J2000 1-820-056-11 SMALL TYPE JACK (VIDEO 1 IN/PORTABLE AUDIO IN/AUTO CAL MIC)
< TRANSISTOR >
R2018 1-249-418-11 CARBON... . : µPC. .
Description
Remark Ref. No.
STR-K790
DCAC DIGITAL
SECTION 6 ELECTRICAL PARTS LIST
NOTE: • Due...
Service Manual - Page 53
STR-K790
MAIN POWER
Ref.
Description
1/4W
R858 1-215-890-11 METAL OXIDE 470
1/4W
1/4W
R881 1-247-871-91...21 SWITCH, TACTILE (?/1
53 Description
R705 R706 R707 0 R708
1-249-421-11 CARBON 1-249-440-11 CARBON 1-249-414-11 CARBON 1-249-405-11 CARBON
2.2K
5%
82K
5%
560
5%
100
5%
0 R709 0 R710
R711 0 R712
R713
1-249-405-11 CARBON
100
5%
1-234-182-11 ENCAPSULATED COMPONENT
1-...
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