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 Trentchint on August 20th, 2014
Why Does My Surround Sound Say Unlock Sony Str-k790
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Related Sony STR-K790 Manual Pages
Service Manual - Page 1
...
-
SERVICE MANUAL
Ver. 1.1 2007.03
STR-K790
US Model Canadian Model
AEP Model UK Model
• STR-K790 is the tuner and the amplifier section in any AM station, turn off the receiver. "Dolby", "Pro Logic" and the double-D symbol are trademarks of Dolby Laboratories. ** "DTS" and "DTS Digital Surround" are registered trademarks of area...
Service Manual - Page 2
STR-K790
Power consumption
Area code
Power consumption
US
210 W
Canadian
290 VA
AEP, UK
220 W
Power consumption (during ...SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. SAFETY CHECK-OUT After correcting the original service problem, perform the...
Service Manual - Page 3
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
...component or a list of the display.
Press to select information displayed on the display.
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 select A.F.D. M PHONES jack N VIDEO 1 IN/
PORTABLE AUDIO...mode.
Press to a headphone.
- Connects to select sound fields (MOVIE, MUSIC).
Turn to select the input ...
Service Manual - Page 5
...models of area code AEP, UK only. However, "UNLOCK" appears on the display if no digital signal is... up when audio signal is activated. Lights up when DVD input is decoding DTS signals. STR-K790
About the ...Surround Left Surround Right Surround (monaural or the surround components obtained by Pro Logic processing) Example: Recording format (Front/ Surround): 3/2.1 Sound Field: A.F.D.
D ;
Service Manual - Page 6
....
The
COAXIAL jack
provides a better
COAXIAL IN quality of loud
jack
sound. 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
RL
SUB
RL
WOOFER SURROUND
SPEAKERS
RL
RL CENTER FRONT SPEAKERS
A DIGITAL INPUT section
OPTICAL Connects...
Service Manual - Page 7
...or off the Sony audio/video components that the remote is assigned to turn the receiver on or off. B ?/1 (on /standby) the same time to direct sunlight
or lighting apparatuses.
Button
Assigned Sony component
VIDEO 1 ...the buttons to select the component you want to control Sony components as follows. When you press the input buttons (C). STR-K790
Inserting batteries into the remote
...
Service Manual - Page 8
... b and to activate muting
function. disc protection), recorder (e.g. audio settings during recording), or multiple items on the TV screen. ... at the same time to select sound fields (MOVIE, MUSIC). level of...
Press to activate the buttons with components in the forward/backward direction of ...options applicable to display the TV's menu.
STR-K790
Name
Function
D 2CH
Press to the TV...
Service Manual - Page 9
...VIDEO 3 button on the remote is displayed on the TV screen.
Therefore, depending on the component, the above operation may not be possible or may not work depending on the model.
&#...dots. Press TV INPUT and TV (O) at the same time to select TV information displayed on the TV screen. STR-K790
Name
Q RETURN/ EXIT O
R V/v/B/b
S DISPLAY
T -/->10/x CLEAR
Function
Press to return to the previous...
Service Manual - Page 10
...kHz step or 10 kHz step can be swapped to all channels so that all buttons are tested. STR-K790
SECTION 2 TEST MODE
SOUND FIELD CLEAR MODE The preset sound field is cleared when this mode is performed. Turn the INPUT SELECTOR dial once again. Every turning of...:
1. When all speakers will be selected for the AM channel step.
SWAP ALL MODE The signal will have sound output.
Service Manual - Page 11
...; D1503 problem
2.
DCAC DSP Data Line Checking 2. DCAC board Checking Connect front left speaker, and the display will be test tone sound output from front left speaker of test tone)
STR-K790
11 DCAC board Checking
Start
DSP Data Line Pass Check
Auto Cal Mic Pass Check
END
Factory Test System Setup
Receiver...
Service Manual - Page 12
... of A, B and C are detected and automatic scanning stops.
You cannot use SG whose output impedance is received in good condition."
12 Turn the power on. 2. STR-K790
Ver. 1.1
TUNER SECTION [FM Auto Stop Check]
SET
SECTION 3 ELECTRICAL ADJUSTMENT
generator OUT (75 Ω)
Procedure: 1.
Service Manual - Page 13
... 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 waveforms are in Ω and 1/4 W or less unless otherwise
specified.
• % : indicates tolerance. • f : internal component. • 2 : nonflammable resistor. • 5 : fusible resistor. • C : panel designation. Voltage variations...
Service Manual - Page 15
...BLOCK DIAGRAM -
4-2. STR-K790
• R-CH ...DRIVE
RY551
R-CH
TM602(1/2) L
R
FRONT
RY601
R-CH
TM604(1/2) L R
SURROUND
Q708 RELAY
DRIVE
RY701
SPEAKERS IMPEDANCE USE 6-16Ω
TM602(2/2)
CENTER
TM604(2/2)
...IC850
2
PROTECT DET
7
POWER AMP -B
+B
-B
FL101 -20V
TUNER +10V RELAY +B AUDIO +7V
AUDIO +5V
AUDIO -7V
Q851,852 -B
SWITCH
D811
Q801 -20V REG
IC1902
3
+10V REG
1
IC821
...
Service Manual - Page 16
... IC1503 D-5 IC1905 C-4
16
16 No. DIGITAL BOARD (SIDE A) - • See page 13 for Circuit Boards Location.
:Uses unleaded solder.
1
2
3
4
5
6
7
8
A
DIGITAL BOARD (SIDE A)
R1943 C1913
B C D E
STR-K790
R1096
FB1350
R1318 C1315 R1321
R1253
FB1306
IC1301
R1313 R1312
R1311
R1555
C1031
FB1310
C1301
R1557
RB1500
C1302 R1301 C1304 R1304
D1302
JR1005 R1303
R1325
...
Service Manual - Page 25
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
G F BOARD CNS502 (Page 17)
G
H
2
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-9pin)
(Page 33)
SPEAKERS...
Service Manual - Page 27
SCHEMATIC DIAGRAM - MAIN BOARD (1/4) - • See page 36 for IC Block Diagram. 4-14. 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...
Service Manual - Page 29
SCHEMATIC DIAGRAM - STR-K790
(Page 27)
TP2
20 MAIN BOARD (1/4) (Page 27)
(Page 30)
POWER AMP
IC701 STK350-530T-E
37 -37
37
1
-1
37
-0.2
-0.2
37...
RR14 10
CC14 0.01
RR15 10
CC15 0.01
RR16 10
CC16 0.01
TM604
R479 2.2k CNP504 5P
L SURROUND
R
SPEAKERS
IMPEDANCE USE 6-16
SUB WOOFER
D
DIGITAL BOARD
(4/5) CNP506 (Page 21)
No mark:FM
STR-K790
29
29 MAIN BOARD (3/4) -
4-16.
Service Manual - Page 40
Not used )
79
XIA
- STR-K790
Pin No. Pin Name
I/O
Description
46
TUNER CLK
O Tuner clock signal output
47
...Front B speaker control signal output
68
DC-CONTROL
O Center speaker relay control signal output
69
C/REAR/SB_RY
O Center, rear, surround back speaker control signal output
70
SW_RY
O Sub woofer control signal output
71
NC
O Not used (Open)
72
BRIDGABLE_RY
O...
Service Manual - Page 53
...405-11 CARBON
100
5%
1-249-405-11 CARBON
100
5%
1-234-182-11 ENCAPSULATED COMPONENT
1-247-847-91 CARBON
4.7K
5%
1-240-855-81 CARBON
6.2K
5%
R763 R764...11 TERMINAL BOARD (FRONT,CENTER/SPEAKERS IMPEDANCE 6-16Ω)
TM602 1-694-805-11 TERMINAL BOARD (SURROUND,SUB WOOFER/ SPEAKERS IMPEDANCE 6-16Ω)
TM604 1-694-805-11 TERMINAL BOARD
POWER BOARD
< ...STR-K790
MAIN POWER
Ref.
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