Sony HT-CT770 Service Manual ▷ View online
HT-CT770
HT-CT770
25
25
3. The sound is not outputted
After entering to the tone test mode
(Refer to 2-9. Tone test mode on the
SECTION 3 TEST MODE on page
22), test signal is outputted.
(Refer to 2-9. Tone test mode on the
SECTION 3 TEST MODE on page
22), test signal is outputted.
The sound is not outputted.
No
Yes
Check and repair the signal path for
being inputted to the DSP (IC2009)
on the MAIN board.
(DSP (IC2009) and digital power
amplifier (IC3001) on the MAIN
board is OK)
being inputted to the DSP (IC2009)
on the MAIN board.
(DSP (IC2009) and digital power
amplifier (IC3001) on the MAIN
board is OK)
Yes
Check and repair the signal path
from the input in turn.
from the input in turn.
Yes
No
The voltage of the following is 3.3 V
in the state of “VOL 0”.
MAIN board: IC1002 pin 70
in the state of “VOL 0”.
MAIN board: IC1002 pin 70
The voltage of the following is 3.3 V.
MAIN board: IC3001 pin 18
MAIN board: IC3001 pin 18
No
Replace the IC3001 on the MAIN
board.
board.
4. Power is not turned on
Power is not turned on.
The voltage of the following is 28 V.
POWER board: CN902 pin 6 to 8
The voltage of the following is
12 to 18 V.
POWER board: CN902 pin 2
POWER board: CN902 pin 6 to 8
The voltage of the following is
12 to 18 V.
POWER board: CN902 pin 2
The voltage of the following is 3.3 V.
MAIN board: IC1002 pin 96, 97
MAIN board: IC1002 pin 96, 97
Yes
POWER board is damaged.
Yes
Yes
Vibrator (X1001) on the MAIN board
is oscillated after AC input.
is oscillated after AC input.
Yes
Fuse (F901) on the POWER board
conduct the electricity.
conduct the electricity.
No
No
No
Replace the IC1002 or vibrator
(X1001) on the MAIN board.
(X1001) on the MAIN board.
The reset signal is inputted to pin
10 of IC1002 on the MAIN board
after AC input.
10 of IC1002 on the MAIN board
after AC input.
Check and repair the area
surrounding IC1003 on the MAIN
board.
surrounding IC1003 on the MAIN
board.
Yes
Yes
No
Replace the IC1002 on the MAIN
board.
board.
No
Replace the fuse (F901) on the
POWER board.
POWER board.
No
Repair the capcitor (C1035), diode
(D1008) or IC1008 on the MAIN
board.
(D1008) or IC1008 on the MAIN
board.
The voltage of the following is 3.3 V.
MAIN board: IC1008 pin 1
MAIN board: IC1008 pin 1
D1008 cathode side
The voltage of the following is 4.1 V.
MAIN board: C1035 plus side
MAIN board: C1035 plus side
SECTION 4
TROUBLESHOOTING
1. “PRTECT” is displayed on the fl uorescent indicator tube after turning the power on
2. The video of HDMI is not displayed normally
“PRTECT” is displayed on the
fluorescent indicator tube after
turning the power on.
fluorescent indicator tube after
turning the power on.
Yes
“PRTECT” is not displayed on the
fluorescent indicator tube, when
removing the speaker (SP1, SP2,
SP3, SP4) and turning the power on.
fluorescent indicator tube, when
removing the speaker (SP1, SP2,
SP3, SP4) and turning the power on.
No
Replace the IC3001 on the MAIN
board.
board.
IC3001 on the MAIN board is
burned out.
burned out.
Yes
Yes
Check and replace the speaker
(SP1, SP2, SP3, SP4) and
connection cable (SPC1, SPC2).
(SP1, SP2, SP3, SP4) and
connection cable (SPC1, SPC2).
The voltage of the following is 3.3 V.
MAIN board: IC1002 pin 18
MAIN board: IC1002 pin 18
The voltage of the following is 3.3 V.
MAIN board: IC1002 pin 74
MAIN board: IC1002 pin 74
No
The voltage of the following is 12 V.
MAIN board: IC3003 pin 4
MAIN board: IC3003 pin 4
No
Yes
The voltage of the following is 3.3 V.
MAIN board: IC1002 pin 63
MAIN board: IC1002 pin 63
Yes
Replace the IC1002 on the MAIN
board.
board.
No
No
Yes
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
IC3001 on the MAIN board do not
short-circuits or opens.
line (pin 32), OUT_B line (pin 35)
and OUT_A line (pin 39, 40) of
IC3001 on the MAIN board do not
short-circuits or opens.
Replace the IC3001 on the MAIN
board.
board.
Yes
Replace the IC3001 on the MAIN
board.
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 IC3001 on the
MAIN board short-circuits or opens.
(pin 27, 28), OUT_C line (pin 32),
OUT_B line (pin 35) and OUT_A
line (pin 39, 40) of IC3001 on the
MAIN board short-circuits or opens.
The PWM signal is inputted OUT_D
line (pin 27, 28), OUT_C line
(pin 32), OUT_B line (pin 35) and
OUT_A line (pin 39, 40) of IC3001
on the MAIN board.
line (pin 27, 28), OUT_C line
(pin 32), OUT_B line (pin 35) and
OUT_A line (pin 39, 40) of IC3001
on the MAIN board.
Repair the short-circuit and opening
of mount parts.
of mount parts.
Yes
Check and repair the area
surrounding IC3003 on the MAIN
board.
surrounding IC3003 on the MAIN
board.
Check and repair the area
surrounding IC3002 on the MAIN
board.
surrounding IC3002 on the MAIN
board.
Check and repair the area
surrounding Q950, Q952 on the
POWER board.
surrounding Q950, Q952 on the
POWER board.
(Except US, Canadian and Taiwan models only)
The video of HDMI is not displayed
normally.
normally.
Check and repair the HDMI board.
Yes
Ver. 1.1
HT-CT770
HT-CT770
26
26
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - HDMI Section -
SYSTEM CONTROLLER
IC1002 (1/4)
7
DATA0+
9
DATA0–
4
DATA1+
6
DATA1–
1
DATA2+
3
DATA2–
10
CLOCK+
12
CLOCK–
16
SDA (5V)
15
SCL (5V)
19
HOT PLUG DET
18
+5V POWER
13
CEC
HDMI TRANSCEIVER
IC3009
38
80
79
79
83
82
82
85
84
84
78
77
77
87
67
68
68
69
R3X0+
37 R3X0–
40 R3X1+
39 R3X1–
39 R3X1–
42 R3X2+
41 R3X2–
41 R3X2–
36 R3XC+
35 R3XC–
35 R3XC–
63 DSDA3
64 DSCL3
64 DSCL3
65 CBUS_HPD3
66 R3PWR5V
TX0+
TX0–
TX0–
TX1+
TX1–
TX1–
TX2+
TX2–
TX2–
TXC+
TXC–
TXC–
TXDSDA
TXDSCL
TX_HPD
ARCRX_TX
7
DATA0+
9
DATA0–
4
DATA1+
6
DATA1–
1
DATA2+
3
DATA2–
10
CLOCK+
12
CLOCK–
16
SDA (5V)
15
SCL (5V)
19
HOT PLUG DET
14
REVERSE (NC)
13
CEC
CN3006
TV (ARC)
HDMI OUT
54
CSDA
7
DATA0+
9
DATA0–
4
DATA1+
6
DATA1–
1
DATA2+
3
DATA2–
10
CLOCK+
12
CLOCK–
16
SDA (5V)
15
SCL (5V)
19
HOT PLUG DET
18
+5V POWER
13
CEC
27 R2X0+
26 R2X0–
26 R2X0–
29 R2X1+
28 R2X1–
28 R2X1–
31 R2X2+
30 R2X2–
30 R2X2–
25 R2XC+
24 R2XC–
24 R2XC–
59 DSDA2
60 DSCL2
60 DSCL2
61 CBUS_HPD2
62 R2PWR5V
7
DATA0+
9
DATA0–
4
DATA1+
6
DATA1–
1
DATA2+
3
DATA2–
10
CLOCK+
12
CLOCK–
16
SDA (5V)
15
SCL (5V)
19
HOT PLUG DET
18
+5V POWER
13
CEC
CN3002
3
CN3001
2
CN3000
1
19 R1X0+
45 HDMI_SDA
53
CSCL
46 HDMI_SCL
45
INT
56 HDMI_INT
43
RESET_N
50
RSVDH
54 HDMI_RST
15 CEC_I/O
18 R1X0–
21 R1X1+
20 R1X1–
20 R1X1–
23 R1X2+
22 R1X2–
22 R1X2–
17 R1XC+
16 R1XC–
16 R1XC–
55 DSDA1
56 DSCL1
56 DSCL1
57 CBUS_HPD1
58 R1PWR5V
SD0_0 90
SD0_1 92
SD0_2 93
SD0_3 94
SD0_1 92
SD0_2 93
SD0_3 94
SPDIFOUT 96
MCLK 91
WS0_OUT 88
SCK0 89
MUTEOUT 95
HDMI_D1
HDMI_D0
HDMI_D2
HDMI_D3
HDMI_D3
HDMI_SPDIF
HDMI_MCK
HDMI_BCK
HDMI_LRCK
RX_MUTE
HDMI_D0 – HDMI_D3, HDMI_SPDIF, HDMI_MCK,
HDMI_BCK, HDMI_LRCK, RX_MUTE
>001B
Q1004
: VIDEO
: AUDIO (DIGITAL)
SIGNAL PATH
XTALOUT 73
XTALIN 74
X3001
27MHz
HDMI IN
(Page 27)
HT-CT770
HT-CT770
27
27
5-2. BLOCK DIAGRAM - MAIN Section -
SYSTEM CONTROLLER
IC1002 (2/4)
A_SEL0
J201
OPT (TV)
DIGITAL IN
ANALOG IN
OPTICAL
RECEIVER
IC201
A/D CONVERTER,
DIGITAL AUDIO INTERFACE RECEIVER
IC2005
L/R_IN
63
MCLK_IN
54
BCLK_IN
42
LRCK_IN
59
FLAG2
81
A/D_2CH
57
RXIN2
33
MIX AMP
IC2004
RXIN4
31
VINL
47
VINR
48
MPIO_A3
6
MPIO_C1
8
MPIO_C2
9
MPIO_C3
10
RXIN3
32
MPIO_A0
3
MPIO_A1
4
MPIO_A2
5
DOUT 17
L/R OUT 48
38
DIR_DO (MC_DIRDI)
MDO
98
DIR_ZERO
16
M_RX_IN
30
M_TX_OUT
29
DSP_MISO
4
DSP_MOSI
3
DSP_SPICLK
5
DSP_SPIDS
48
DSP_INTR
66
DSP_RESET
49
SF_HOLD_DSP
50
DIR_XSTATE
52
23
MDI
24
MC
25
DIR_HCE
MS
51
26
DIR_RST
RST
53
DIR_DI (MC_DIRDO)
99
DIR_CLK
100
34
XTO
40
XTI
39
UART_OUT
30
UART_IN
31
MISO
20
MOSI
19
BOOT_CFG1
6
SO
2
SI
5
SCK
6
CE#
1
HOLD#
7
SPICLK
21
DSP_CS
24 23
DPI_P05
77
FLAG0
98
RESET
EEPROM
IC1001
SDA
ROM_SDA
ROM_SCLK
5
SCL
6
8
9
9
MFI
IC1010
SDA
CP_DATA
CP_CLK
2
SCL
6
TRIAXIAL ACCELERATION
SENSOR
IC1012
SDA
2
SCK
12
88
87
87
CP_RESET
RST
7
79
MC_BT_RXD0
34
MC_BT_TXD0
33
MC_BT_RTS
36
BT_MUTE
73
BT_RST
42
RTS1/MC_BT_CTS0
32
BT_UART_TX
L_OUT–
L_OUT+
R_OUT+
BT_UART_RX
BT_UART_RTS
BT_UART_CTS
BT_UART_CTS
MUTE
RESET
BT1
Bluetooth MODULE
R_OUT–
SL/SR_IN
40
MPIO_B1 12
C/SW_IN
58
MPIO_B2 13
SBL/SBR_IN
62
MPIO_B3 14
DIR_IN
65
ANALOG AUDIO SELECTOR
IC2003
A
X0
12
X1
14
Y1
5
Y0
1
X 13
Y 3
10
C/SW1_OUT 56
BCLK_OUT 60
LRCLK_OUT 61
XTAL 13
CLKIN 12
SCKO 20
BCK 19
LRCK 18
NPCM 2
DIR_ERROR
25
HDMI_MUTE_ON
55
HDMI_MUTE_DET
47
HDMI_NON_LPCM
24
SEL_HDMI
57
LEVEL SHIFT
IC2013 (2/2)
SHIFT
CONTROL
IC2011
X2001
24.576MHz
X2002
25MHz
DSP
IC2009
AMP_D1FLFR
MCK
DSP_LRCK
DSP_BCK
AMP_D3CSW
AMP_D1FLFR, AMP_D3CSW,
MCK, DSP_BCK, DSP_LRCK
>002B
: Bluetooth
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
SIGNAL PATH
HDMI_D1
HDMI_D0
HDMI_D2
HDMI_D3
HDMI_SPDIF
HDMI_MCK
HDMI_BCK
HDMI_LRCK
HDMI_D3
HDMI_SPDIF
HDMI_MCK
HDMI_BCK
HDMI_LRCK
RX_MUTE
HDMI_D0 – HDMI_D3, HDMI_SPDIF, HDMI_MCK,
HDMI_BCK, HDMI_LRCK, RX_MUTE
HDMI_BCK, HDMI_LRCK, RX_MUTE
>001B
D1001
D1004
DATA SELECTOR
IC2010
ERROR 1
SEL
2A
1A
5
2B
6
1B
3
2
MPIO_C0 7
4A
4B
4B
13
14
2Y
FLAG1
80
1Y
4Y
7
4
12
1
Q2002
D1002
SWITCHING
IC2013 (1/2),
Q2003
BUFFER
I2014
RF1
RF MODULATOR
(SWA12-4V TX)
8
DIN_TX
12
BCK1_TX
11
LRCK1_TX
17
SDA_STX
18
SCL_STX
20
INT
19
RESETN
CN1003
WL_RST
21
WS_INT
65
WL_SCL
40
WL_SDA
41
SERIAL FLASH
IC2008
Q2001
D2003
(Page 26)
(Page 28)
HT-CT770
HT-CT770
28
28
5-3. BLOCK DIAGRAM - AMP Section -
SDA
20
SCL
21
MUTE
19
PDN
18
RESET
16
13
Xin
11
Xout
X1001
8MHz
SYSTEM CONTROLLER
IC1002 (3/4)
DAMP_SDA
28
DAMP_SCL
27
DAMP_SOFT_MUTE
67
DAMP_PDN
69
DAMP_INIT
68
DRIVE_OCP
(DIAG)
18
DC_DET
74
STREAM PROCESSOR
IC3002
SDIN1
24
SCLK
23
LRCK
22
MCLK
11
AMP_D1FLFR
MCK
SDIN3
26
AMP_D3CSW
DSP_LRCK
DSP_BCK
AMP_D1FLFR, AMP_D3CSW,
MCK, DSP_BCK, DSP_LRCK
MCK, DSP_BCK, DSP_LRCK
>002B
BUFFER
Q3002
PWM_M_2 40
DIGITAL POWER AMP
IC3001
INPUT_D
OUT_D
15
INPUT_C
14
INPUT_B
6
INPUT_A
5
27
OUT_D 28
OUT_C 32
OUT_B 35
PW_VACS_DET 63
OUT_A 39
PWM_P_2 41
VALID 37
PWM_M_4 48
PWM_P_4 49
DC DETECT
Q3003
THERMAL DETECT
Q950, 952
DC DETECT
Q3001
FA
U
LT
16
AMP_OVF
70
CLIP
18
OTW
17
RESET
4
SP1
L3001
L3004
L3003
L3002
OUT_A 40
TH902
(Except US, CND, TW)
WOOFER
(L-CH)
SP3
TWEETER
(L-CH)
SP2
WOOFER
(R-CH)
SP4
TWEETER
(R-CH)
(Except US, CND, TW)
: AUDIO (DIGITAL)
SIGNAL PATH
: AUDIO (ANALOG)
Abbreviation
: Canadian model
CND
: Taiwan model
TW
(Page 27)
Ver. 1.1
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