Sony SA-CT780 Service Manual page 28

HT-CT780
2. The video and audio of HDMI is not outputted
The video and audio of HDMI is not
outputted.
Yes
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
Yes
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
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)
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))
Yes
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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
No
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.
Check the area surrounding RESET line
No
on the MAIN board.
Check the mounted state of vibrator
(X1501) on the MAIN board.
Check the HOT PLUG DET line
(mounted state of connector (CN1001,
No
CN1501, CN1502) and resistor (R1035,
R1522, R1523, R1527, R1528, R1532,
R1533)) on the MAIN board.
No
The voltage of the following is about 6.0 V.
MAIN board: IC1005 pin 5
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.
Check the SCL, SDA line (mounted state
of connector (CN1001, CN1004, CN1501,
No
CN1502) and resistor (R1093, R1096,
R1097, R1098, R1520, R1521, R1530,
R1531, R1560, R1561)) on the MAIN
board.
Replace IC604 on the MAIN board
No
or complete MAIN board (When
IC601, IC603 and IC605 on the
MAIN board is damaged).
Replace the complete MAIN board
No
(When IC1501 on the MAIN board
is damaged) or vibrator (X1501) on
the MAIN board.
Replace the connector (CN1001,
CN1501, CN1502) and resistor
No
(R1035, R1522, R1523, R1527,
R1528, R1532, R1533) on the
MAIN board.
Check the DD_6V line (mounted
No
state of capacitor (C603, C605,
C606, C608, C612), coil (L602) and
resistor (R613)) on the MAIN board.
No
Replace the capacitor (C603, C605,
C606, C608, C612), coil (L602) and
resistor (R613) on the MAIN board.
No
Replace IC1005 on the MAIN board.
Replace the connector (CN1001,
CN1004, CN1501, CN1502) and
No
resistor (R1093, R1096, R1097,
R1098, R1520, R1521, R1530,
R1531, R1560, R1561) on the
MAIN board.