DOWNLOAD Sony HT-CT780 Service Manual ↓ Size: 6.12 MB | Pages: 78 in PDF or view online for FREE

Model
HT-CT780
Pages
78
Size
6.12 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
ht-ct780.pdf
Date
PREV: Sony HT-CT380 / HT-CT381 / SA-CT380 / SA-CT381 Service Manual

Sony HT-CT780 Service Manual ▷ View online

HT-CT780
25
2-14.  SW Distance Test Mode
(It is displayed “SW.DIST” on the fl uorescent indicator tube)
Not used for the servicing.
Press the [
?/1
] button if having entered this mode.
2-15.  HDCP Key Read Mode
(It is displayed “HDCP” on the fl uorescent indicator tube)
Not used for the servicing.
Press the [
?/1
] button if having entered this mode.
2-16.  NFC Test Mode
(It is displayed “NFC.TST” on the fl uorescent indicator tube)
Not used for the servicing.
Press the [
?/1
] button if having entered this mode.
2-17.  USB Test Mode
It can check the communication line for the between 
-com and 
USB.
Procedure:
1.  Enter the test mode menu.
 
(Refer to “Setting method of the test mode menu” on page 22) 
2.  Press the [VOLUME +]/[VOLUME –] buttons to select the 
“USB.TST”, press the [INPUT] button.
3.  A few seconds later, the check result of the communication line 
for the between 
-com and USB (“USB OK” or “USB NG”) is 
displayed on the fl uorescent indicator tube.
or
Releasing method:
Press the [
?/1
] button to release the test mode menu.
2-18.  Auto Standby Test Mode
(It is displayed “T. STBY” on the fl uorescent indicator tube)
Not used for the servicing.
Press the [
?/1
] button if having entered this mode.
2-19.  Wireless Sound Test Mode
It can display the 
-com version of Subwoofer (SA-WCT780).
Note : More than one item may 
be displayed on the fl uorescent indica-
tor tube
, but it is not used for the servicing other than “VER.CHE”.
Preparation:
•  Prepare the remote commander (RMT-AH101U) attached to 
this unit.
• 
Connect the Bar Speaker (SA-CT780) and the Subwoofer (SA-
WCT780) by wireless.
Procedure:
1.  Enter the test mode menu.
 
(Refer to “Setting method of the test mode menu” on page 22) 
2.  Press the [VOLUME +]/[VOLUME –] buttons to select the 
“WS TST”, press the [INPUT] button.
3.  The message “FACTRY” is displayed on the fl uorescent indi-
cator tube and enter the wireless sound test mode.
4. Press 
the 
[
V
]/[
v
] buttons on the remote commander, select the  
“VER.CHE”, and press the [ENTER] button on the remote 
commander.
5. The 
-com version of Subwoofer (SA-WCT780) is displayed on 
the fl uorescent indicator tube.
(Displayed values in the above fi gure are example)
6. When [
V
]/[
v
] buttons on the remote commander is pressed 
while the 
-com version of Subwoofer (SA-WCT780) is dis-
played on the fl uorescent indicator tube, year, month and day 
of the creation is displayed on the fl uorescent indicator tube.
(Displayed values in the above fi gure are example)
 When 
[
V
]/[
v
] buttons on the remote commander is pressed  
again, the display returns to the 
-com version of Subwoofer 
(SA-WCT780) display.
Releasing method:
Press the [
?/1
] button to release the test mode menu.
HT-CT780
26
2-20.  Wireless Sound Cold Reset
It can initialize various backup information of Subwoofer (SA-
WCT780).
Preparation:
Connect the Bar Speaker (SA-CT780) and the Subwoofer (SA-
WCT780) by wireless.
Procedure:
1.  Enter the test mode menu.
 
(Refer to “Setting method of the test mode menu” on page 22) 
2.  Press the [VOLUME +]/[VOLUME –] buttons to select the 
“WS RST”, press the [INPUT] button.
3.  The on/standby indicator on the Subwoofer (SA-WCT780) 
turns red and fl ashes, then turns on yellow.
on/standby indicator
Red (flash) 
t 
Yellow (light up)
4.  Pull out the power cord on the Subwoofer (SA-WCT780) from 
an outlet and insert the power cord again.
2-21. Cold 
Reset
It can initialize various backup information.
Procedure:
1.  Enter the test mode menu.
 
(Refer to “Setting method of the test mode menu” on page 22) 
2.  Press the [VOLUME +]/[VOLUME –] buttons to select the 
“RESET”, press the [INPUT] button.
3.  The message “RESET” is displayed on the fl uorescent indica-
tor tube, then turn the power off.
HT-CT780
27
SECTION  4
TROUBLESHOOTING
1.  “PRTECT” is displayed on the fl uorescent indicator tube after turning the power on
“PRTECT” is displayed on the 
fluorescent indicator tube after 
turning the power on.
Yes
“PRTECT” is not displayed on the 
fluorescent indicator tube, when 
removing the speaker connection 
connector (CN501, CN502) and 
turning the power on.
No
Replace the IC503 on the MAIN board.
IC503 on the MAIN board is burned 
out.
Yes
Yes
Check and replace the speaker (SP1, 
SP2, SP3, SP4) and connection cable 
(SPC1, SPC2).
The voltage of the following is 3.3 V.
MAIN board: IC102 pin 56
The voltage of the following is 3.3 V.
MAIN board: IC102 pin 50  
No
The voltage of the following is 12 V.
MAIN board: IC502 pin 4
No
Yes
Yes
No
No
No
No
OUT_D line (pin 27, 28), OUT_C line 
(pin 32), OUT_B line (pin 35) and OUT_A 
line (pin 39, 40) of IC503 on the MAIN 
board do not short-circuits or opens.
Replace the IC503 on the MAIN board.
Yes
Replace the IC503 on the MAIN board.
Yes
Yes
Mounted parts on the OUT_D line (pin 27, 
28), OUT_C line (pin 32), OUT_B line (pin 
35) and OUT_A line (pin 39, 40) of IC503 
on the MAIN board short-circuits or opens.
The PWM signal is inputted INPUT_D 
line (pin 15), INPUT_C line (pin 14), 
INPUT_B line (pin 6) and INPUT_A line 
(pin 5) of IC503 on the MAIN board.
Repair the short-circuit and opening of 
mounted parts.
Yes
Check and repair the area 
surrounding IC502 on the MAIN 
board.  
Check and repair the area surrounding 
IC501 on the MAIN board.  
The voltage of the following is 3.3 V.
MAIN board: IC102 pin 121
Replace the complete MAIN board.
No
Yes
Check and repair the area 
surrounding Q950, Q952 on the 
POWER board.
(Except US, Canadian and Taiwan models 
only)
Ver. 1.1
HT-CT780
28
2.  The video and audio of HDMI is not outputted
The video and audio of HDMI is not 
outputted.
The voltage of the following is 6.0 V.
MAIN board: IC601 pin 3
The voltage of the following is 1.0 V.
MAIN board: IC603 pin 14
The voltage of the following is 1.3 V.
MAIN board: IC603 pin 3
The voltage of the following is 5.0 V.
MAIN board: IC604 pin 5
The voltage of the following is 3.3 V.
MAIN board: IC605 pin 1
The voltage of the following is about 3.3 V.
MAIN board: IC601 pin 7
MAIN board: IC603 pin 12
MAIN board: IC603 pin 5
MAIN board: IC604 pin 3
MAIN board: IC605 pin 4
Check the mounted state of  the area 
surrounding IC601, IC603, IC604 and 
IC605 on the MAIN board.
The voltage of the following is 3.3 V.
MAIN board: IC1501 pin 69 (RESET)
The pin 114 (XTALIN) of IC1501 on the 
MAIN board is oscillated.
Yes
Yes
One voltage of the following is about 5.0 V.
MAIN board: CN1001 
 
pin 19 (HOT PLUG DET)
MAIN board: CN1501 
 
pin 19 (HOT PLUG DET)
MAIN board: CN1502 
 
pin 19 (HOT PLUG DET)
Yes
The voltage of the following is about 5.0 V.
MAIN board: CN1004 
 
pin 18 (+5V POWER)
The voltage of the following is about 6.0 V.
MAIN board: IC1005 pin 5
Yes
The voltage of the following is about 5.0 V.
MAIN board: CN1001, CN1004, CN1501,
 CN1502
pin 15 (SCL (5V)), pin 16 (SDA (5V))
– Continued on page 29 –
Yes
No
No
No
No
No
Check the HOT PLUG DET line 
(mounted state of connector (CN1001, 
CN1501, CN1502) and resistor (R1035, 
R1522, R1523, R1527, R1528, R1532, 
R1533)) on the MAIN board.
Yes
Check the area surrounding RESET line 
on the MAIN board.
Check the mounted state of vibrator 
(X1501) on the MAIN board.
abnormality
Replace the complete MAIN 
board (When IC1501 on the 
MAIN board is damaged) or 
vibrator (X1501) on the 
MAIN board.
abnormality
Replace IC604 on the MAIN 
board or complete MAIN 
board (When IC601, IC603 
and IC605 on the MAIN 
board is damaged).
abnormality
Replace IC1005 on the 
MAIN board.
abnormality
Replace the connector 
(CN1001, CN1501, 
CN1502) and resistor 
(R1035, R1522, R1523, 
R1527, R1528, R1532, 
R1533) on the MAIN board.
No
Check the SCL, SDA line (mounted state 
of connector (CN1001, CN1004, CN1501, 
CN1502) and resistor (R1093, R1096, 
R1097, R1098, R1520, R1521, R1530, 
R1531, R1560, R1561)) on the MAIN 
board.
abnormality
Replace the connector 
(CN1001, CN1004, CN1501, 
CN1502) and resistor 
(R1093, R1096, R1097, 
R1098, R1520, R1521, 
R1530, R1531, R1560, 
R1561) on the MAIN board.
Replace the capacitor 
(C603, C605, C606, C608, 
C612), coil (L602) and 
resistor (R613) on the 
MAIN board.
Check the DD_6V line 
(mounted state of capacitor 
(C603, C605, C606, C608, 
C612), coil (L602) and 
resistor (R613)) on the 
MAIN board.
abnormality
Yes
The voltage of the following is about 3.3 V.
MAIN board: IC1005 pin 1
Check the mounted state of the area 
surrounding IC1005 on the MAIN board.
Page of 78
Display

Click on the first or last page to see other HT-CT780 service manuals if exist.

RANDOM: