2 SCHEMATIC.COMPONENT LAYOUT AND BOM OF POWER SUPPLY
2.1 SCHEMATIC OF POWER SUPPLY
2.2 COMPONENT LAYOUT OF POWER SUPPLY
3 SCHEMATIC.COMPONENT LAYOUT AND BOM OF MAIN BOARD
3.1 SCHEMATIC OF MAIN BOARD
3.2 COMPONENT LAYOUT OF MAIN BOARD
3.3 BOM OF MAIN BOARD
Page 3
Main Board
8
7
4
2
3
1
9
6
5
10
Main Board Trouble Shooting Guide
(DTT1609)
Here are the procedures you can refer to whenever terrestrial receivers do not
operate properly. You can check problems and repair the units on the basic level
according to the following procedures
Page 4
1. SHORT TEST
☞Before turning on AC power, check POSITIVE VOLTAGE and also check whether SHORT
between GROUND's and PIN SHORT for TUNER are detected or not.
3. Check MAIN CLOCK 24MHz and SYSTEM CLOCK (PLL) to operate normally after SYSTEM
operates.
☞For the first thing, check 24MHz from Y401 flows into [OSCI(PIN B18)] of MAIN
CPU
If the 24MHz is unstable, Check Y401 is damaged or not.
If you are firm belief of damage for the device, then replace the device.
☞ And then, check that 800MHz is being supplied to DDR3 with RESET
If the clock 800MHz on Pin-J7&K7 of U401 is not generated from inside of the
chip,Please check the soldering state of U401,U402 and U403
(MAIN CLOCK) 24MHz
(DDR3 CLOCK) 800MHz
Page 9
MAIN CLOCK
DDR3 CLOCK 800Mhz
Page 10
4. In case that MAIN CPU operates normally but there is no VIDEO display.
▶ In case of no OSD display.
☞ If OSD is not displayed, check first if VIDEO SIGNAL is detected from
[R419(CVBS),R416(R),R417(G),R418(B)] of MAIN CPU.
☞ And then, check any part with no DATA after checking VIDEO SIGNAL from VIDEO
SIGNAL PORT of MAIN CPU, or SCART
▶ In case of no MPEG display
☞ There can be a variety of reasons for the case
☞ Check first that CHANNEL of TP SIGNAL is locked properly.
☞ After this signal input to the resistor connected to MAIN CPU is done normally,
A/V DATA comes out from MAIN CPU and flows into MPEG CHIP(MAIN CPU). If there is no
problem to here, it is thought that MAIN CPU and channel are operating without any
fault.
☞ In case of no MPEG display to this point, inspect any disorder by checking
U701(TUNER IC) and I/F of MAIN CPU.
Page 11
VIDEO SIGNAL
If wave-form is not like this
picture, check that wave-form
output is normal from each
terminal
Page 12
5. In case of no MPEG and no OSD at the same time.
☞ Check that 1Vp_p(0.7Vp_p for RGB) comes out normally from VIDEO PART(CVBS) of
MAIN CPU.
REDCVBS
BLUEGREEN
7. In case of normal VIDEO SIGNAL flowing out but abnormal AUDIO SIGNAL.
☞ Check that ADAC_L(U201 PIN2),ADAC_R(U201 PIN9) signals have normal inputting and
outputting from MAIN CPU. The signal is linked to SCART.
Page 13
Page 14
# ADDITIONAL TROUBLESOOTHING
1) STAND-BY mode on Set.
Ordinarily, STAND-BY mode results from SHORT on LNB. Check first if TR on LNB has
stopped, and then in case that STAND-BY mode resulted from wrong software, down-load
a proper software.
POWER SWITCH
There is a TR's as a switching
role on the LNB bundle. 5V comes
out normally from Q751. If
voltage is not enough or steady,
check if the voltage is impressed
properly from Q751.
Page 15
2) Screen problem in color
If you have Black-and-White screen. It mainly results from distorted 24MHz
frequency. In case of no screen display or different
color displayed, it also mainly results from the Y401 problem. Additionally, in case
that the screen display works but is with one color only, for example blue, green,
or red, it mainly results from software fault(possiblely detected only on RGB TV).
RGB Circuit
REDGREEN
BLUE
Page 16
Red signal input
Blue signal input
Green signal input
Page 17
3) Weak TUNER signal
Check first that the voltage is impressed to LNB. If there is nothing wrong in LNB
Voltage, check if the voltage is impressed well into TUNER bundle and if data flow
out properly. If every condition is satisfied, TUNER itself can be considered to be
defective. In occasion, precise inspection should be done in case that there is
SHORT between pins(fault rarely made by a worker).
Page 18
4) Screen ratio problem
If a strange ratio in 4:3 and 16:9 is detected, the voltage of TV scart pin number 8
is below 9V. In case of around 7V, screen will be shown with 16:9 ratio. In case of
over 10V, the ratio will be 4:3. If there is still a fault on screen after adjusting
screen ratio, it means the resistance of R595 on the circuit is not 1K. If the
voltage is normal but the voltage switch does not operate properly, it means that
Q593 TR is not operating normally. In addition, Q592 can affect the problem because
Q592 is a TV/sat transferring switch .
4:3-Low 0V
16:9-High 3.3V
16:9= 6V
4:3=11.3V
Page 19
Page 20
2 SCHEMATIC.COMPONENT LAYOUT AND BOM OF POWER SUPPLY
2.1 SCHEMATIC OF POWER SUPPLY
Page 21
2.2 COMPONENT LAYOUT OF POWER SUPPLY
3 SCHEMATIC.COMPONENT LAYOUT AND BOM OF MAIN BOARD
3.1 SCHEMATIC OF MAIN BOARD
Page 22
D
C
B
A
BLOCK DIAGRAM
POWER BLOCK
AC/DC
TUNER
DDR3
(128MB)
Serial FLASH
(4MB)
Nand FLASH
(128MB)
EEPROM
(2KB)
POWER
5V/2A
VCC5V
2 A
PD_CTRL
LOW IF
I2C,AGC
LMI
T2 DEMOD
(MSB1230)
I2C
TS
MSD5043-V60
MII
SPI
IR
Front pannel
VCC3_3V_PM
LDO
LM1117-3.3V
50 mA
MOSFET
DC/DCVCC1_8V_PD
PAM2312
DC/DC
PAM2312
DC/DC
MP1482
DC/DC
PAM2312
VCC5V_PD
1 A
220 mA
VCC3_3V_PD
300 mA
VDDC1V2
1.2A
DDR1V5
250 mA
564
Version History
3
REV.
1
2
V1.0: 2011-07-24 Created
CVBS
Y/PB/PR
L/R
Video buffer
Audio OP
RCA
SCART
SPDIF
ESDHDMI1.3
ESDUSB
PHYRJ45
OPTION
Front pannel
PLL,RESET
FLASH
AUDIO OP
DC/DC
VCC12V
20 mA
USB/HDMI
Video Buffer
VCC2_5V
LDO
LM1117-2.5V
50 mA
T2 DEMOD
TUNER
MSD5043
EEPROM
TUNER
MSD5043 CORE
T2 DEMOD
MSD5043
DDR3
2
HISTORY OF MODIFICATIONS
Shenzhen Jiuzhou Electric CO.,LD
DESCRIPTION
PAGE DESCRIPTION
DOC.NO.:
SCH P/N:
PCB P/N:
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
DESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:
SIZE:
1
MODEL NO.:
PROJECT CODE:
DOC. REV.:
Xuewei
A2
APP.BYDATECHECK.BY
2011-12-19
SHEET:
D
C
B
A
V1.1
SIGN
DATE
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OF
111
Page 23
564
3
REV.
1
2
HISTORY OF MODIFICATIONS
2
1
APP.BYDATECHECK.BY
D
C
B
A
GPIO MAPPING:
MODE_0
USAGE
/FLASH_WP
PM_GPIO0
RGB/CVBS
PM_GPIO1
PM_GPIO2
16:9/4:3
TV/AV
PM_GPIO3
PD_CTRL
PD_CTRL
PM_GPIO5
ANT_PWR_CTRL
PM_GPIO6
ANT_OVERLOADTUNER
MUTE_CTRL
PM_GPIO8
USB_OCD
S_GPIO1
S_GPIO2
/USB_CTRL
S_GPIO4
FE_RST
FP_CLK
SAR1
FP_DATA
SAR2
FP_STB
SAR3
USAGE DETAIL
SFLASH
SCART
SCART
SCART
POWER CTRL
TUNER
AUDIO_MUTE
USB
USB
DEMOD
Front panel
Front panel
Front panel
NOTE
D
C
B
Shenzhen Jiuzhou Electric CO.,LD
DESCRIPTION
PAGE DESCRIPTION
DOC.NO.:
SCH P/N:
PCB P/N:
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
DESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:
SIZE:
MODEL NO.:
PROJECT CODE:
DOC. REV.:
Xuewei 2011-12-19
SHEET:
A2
V1.1
SIGN
SIGN
SIGN
SIGN
OF
511
A
DATE
DATE
DATE
DATE
Page 27
D
C
B
A
HDMI
J601
TX2+
TX2SD
TX2-
TX1+
TX1SD
TX1-
TX0+
TX0SD
TX0-
TXC+
TXCSD
TXC-
CEC
RSVD
SCL
SDA
GND
+5V
HPD
GND22GND21GND20GND
23
Smart Card
SC0_5V/3V
SC_K1
SC_I/O
AUX2
AUX1
L561 FB/60R
VCC5V_PD
J501
1
5V
2
D-
3
D+
4
GND
5
SHIELD
USB A/Female 2.0 pitch
T
1
T3
U501
AP2191
5
IN
3
FLG
4
EN
C502
104
3
REV.
1
2
5V_USB
1
OUT
R508
CE501
GND
C503
10K
104
2
470uf/10v
465
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
VCC3_3V_PD
C561
104
[3,6]
[6]
[6]
[6]
[6]
0603
CE561
100uf/10v
SC_VCC
SC_RST
SC_CLK
AUX1
SC_K1
R601 5R1
[3]
R602 5R1
R603 5R1
R604 5R1
R605 5R1
R606 5R1
R607 5R1
R608 5R1
ESD
ESD
ESD
ESD
ESD
ESD
R628 ESD
R627
R626
R625
R624
R623
R622
R621 ESD
R630
R629
ESD
ESD
R615 1K
[3]
R616
R632
47K
ESD
R564
R561
10K
10K
C562 104
10
11
12
13
14
C564
C563
104
104
[6]
[6]
[6]
[6]
[6]
R567
C566
C567
18K
10P
150P
HDMI-TX2P
[3]
HDMI-TX2N
[3]
HDMI-TX1P
[3]
HDMI-TX1N
[3]
HDMI-TX0P
[3]
HDMI-TX0N
[3]
HDMI-TXCLKP
[3]
HDMI-TXCLKN
HD5V
R6112KR612
2K
R613 100R
[3]
HDMI_SCL
[3]
R614 100R
HD5V
HDMI_HPD
SC0DATAIN
U502
1
CLKDIV1
AUX2UC
2
CLKDIV2
AUX1UC
3
RFU1
I/OUC
4
GNDP
XTAL2
5
S2
XTAL1
6
VDDP
OFF
7
S1
GND
8
VUP
VDD
9
PRES
RSTIN
PRES
CMDVCC
I/O
NC
AUX2
VCC
AUX1
RST
CGND
CLK
ST8024
1
VCC
2
RST
3
CLK
4
C4
9
SC_DET1
10
SC_DET2
C568
104
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ICA-619
F601
FUSH
SMD1210
C602
C601
R631
104
2.2uF
ESD
0603
R529
[3,6]
R565 NC
C565
R566
104
10K
J502
[6]
8
C8
7
[6]
IO
6
VPP
5
GND
0R
R2 ???
R569 1K
R570
68K
HDMI_SDA
VCC5V_PD
R617 NC(0R)
E
C
Q601
R618
BC857
B
220R
R619
1K
[3,6]
SC0_AUX1
[3,6]
SC0_AUX2
[3,6]
SC0_AUX1
[3,6]
SC0DATAIN
[3,6]
SC0CLK
[3,6]
SC0DET
VCC5V_PD
[6]
SC0_RESET
[3,6]
SC0CMDVCC
[6]
SC_VCC
[6]
SC_RST
[6]
SC_CLK
C569
33P
AUX2
SC_I/O
SC0RESET
USB Power
AP2191:
AP2181:
VCC3_3V_PD
10K
R521
[3,6]
USB_OCD
/USB_CTRL
USBPOWER
H:5V_USB ON
L:5V_USB OFF
H:5V_USB OFF
L:5V_USB ON
10K
10K
10K
10K
R522
R523
R524
R525
1
2
3
NC(741GU04)
R568 0R
5V_USB
1
T4
SC0_RESET
T
ESD
ESD
R512
R511
C512 8.2P
C511 8.2P
VCC5V_PD
R506
10K
C501
R507
10UF
10K/NC
0805
R501 5R1
[3]
USB1_DM
R502 5R1
[3]
USB1_DP
VCC5V_PD
R505
10K
[3]
R509 100R
[3]
10K
10K
10K
R526
R527
R528
[3,6]
SC0_AUX2
[3,6]
SC0DATAIN
[3,6]
SC0DET
[3,6]
SC0CMDVCC
[3,6]
SC0RESET
[3,6]
SC0_5V/3V
[3,6]
SC0CLK
[3,6]
SC0_AUX1
VCC3_3V_PD
U481
5
NC
VCC
1A
4
[6]
1Y
GND
2
HISTORY OF MODIFICATIONS
Shenzhen Jiuzhou Electric CO.,LD
DESCRIPTION
HDMI & USB & Smart card
DOC.NO.:
SCH P/N:
PCB P/N:
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
Screw Holes
2
3
4
X5
X3
HOLE
HOLE
1
1
879
6
5
X1
MARK2
MARK6
1
MARK
DESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:
2
3
4
MARK3
1
1
MARK
MARK
SIZE:
1
CHECK.BYDATEAPP.BY
879
879
2
3
6
4
5
5
X2
MARK4
MARK1
MARK5
1
1
MARK
MARK
MARK
MODEL NO.:
PROJECT CODE:
DOC. REV.:
2011-12-19
Xuewei
A2
6
X4
1
SHEET:
T1
T
1
V1.1
T2
T5
T
T
1
1
SIGN
DATE
SIGN
DATE
SIGN
DATE
SIGN
DATE
OF
611
D
C
B
A
Page 28
D
C
B
A
AUDIO OP
[3]
LINE_OUTL
[3]
LINE_OUTR
VCC5V_PD5VA_A
L201 FB/60R
100uf/16v
Video Buffer
[3]
IDAC_OUT_X
VCC5V_PD
L301 FB/60R
IDAC_OUT_R
IDAC_OUT_G
IDAC_OUT_B
100uf/16v
465
4:3/16:9 Control
AV/TV
16:9/4:3
GPIO
R223 390K
C222 6.8P
5VA_A
UVP>1.15V
R215
0R
R216
220K
R217
0R
R218
220K
0603
CE201
R301
NC
0603
CE301
R219
C217
2.2uF
0805
C216
2.2nF
C219
2.2uF
0805
C218
2.2nF
C201
104
U301
NCS2553
1
IN1
OUT1
2
IN2
OUT2
3
IN3
OUT3
5VA
4
VCC
GND
C308
104
R221
100K
5.1K
C220
390P
R220
R222
100K
5.1K
C221
390P
C304 150P
R304 75R
8
R305 75R
7
C305 150P
6
5
R233
5.1K
7
8
PVDD
1
-IN12OUT1
-
+
10
-IN2
EPAD_GND
PVSS5CN6CP
4
11
C224
0.33uF
C223 6.8P
R224 390K
L303 600R
L302 600R
Near Connector
R225 330R
R234
5VA_A
1.1K
UVP
3
EN
R226 330R
9
OUT2
U201
SGM8905
C225
0.33uF
C307
C306
47P
47P
R235
NC(1M)
R231 1K
R232 4K7
[7]
LINE_OUT_L
R227
C226
10K
0.33uF
[3]
MUTE_CTRL
[7]
CVBS_RCA
CVBS_SCART
LINE_OUT_R
R228
10K
C227
0.33uF
[7]
[7]
MODE
16:9
(5V~8V)
(9.5V~12V)
AV
(0V)
TV
R591
[3]
TV/AV
RGB/CVBS Control
GPIO
MODE
CVBS OUT (0V)
RGB OUT (1-3V)
STB StandBy
(GPIOxx)(GPIOxx)
1
1
0
VCC12V
R594
1.5K
0603
VCC5V_PDVCC5V_PD
Q592
10K
3904
R593
B
10K
R598
10K
R597
[3]
RGB/CVBS
RGB/CVBS
(GPIOxx)
150R
0
1
0
3
REV.
1
2
1
0
X
[7]
SCART_MODE
R595
1.5K
0603
R592
Q593
C
E
E
VCC5V_PDVCC5V_PD
B
10K
C
3904
R596
[3]
B
R560
150R
C
Q594
3904
E
R599
1K
16:9/4:3
10K
[7]
FB_OUT
2
HISTORY OF MODIFICATIONS
LINE_OUT_L
LINE_OUT_R
CVBS_RCA
LINE_OUT_R
LINE_OUT_L
SCART_MODE
CVBS_SCART
SPDIF
PB_OUT
Y_OUT
PR_OUT
FB_OUT
CHECK.BYDATEAPP.BY
[7]
[7]
[7]
[7]
[7]
[7]
[7]
[7]
[7]
[7]
[7]
[7]
C231
102
C232
102
1
J801
R/OUT
1
2
R/IN
L/OUT
3
4
GND
5
GND
6
L/IN
BLUE
7
FUNCTION
8
9
GND
10
11
GREEN
12
13
GND
14
15
RED/C
16
BLANK
17
GND
18
GND
VIDEO/O
19
20
VIDEO/IN
21
SHIELD
TV SCART
J301
3
2
1
6
5
4
D
NC
NC
NC
C
B
SPDIF OUT
L251 FB120R
U302
1
8
[3]
[3]
2
3
[3]
4
5VA
C309
104
R312 75R
IN1
OUT1
R315 75R
7
IN2
OUT2
R317 75R
6
IN3
OUT3
5
VCC
GND
NCS2553
L304 600R
L305 600R
L306 600R
C322
47P
[7]
PR_OUT
[7]
Y_OUT
[7]
C324
C323
47P
47P
PB_OUT
VCC5V_PD
SPDIF_OUT
0603
C251
R251
22R
104
C
R252
[3]
100R
Q251
B
3904
E
R253
100R
C254
100P
L252
C252
104
R254
75R
[7]
SPDIF
FB120R
0603
C253
10P
Near Connector
Shenzhen Jiuzhou Electric CO.,LD
DESCRIPTION
AUDIO & VIDEO & SCART
DOC.NO.:
SCH P/N:
PCB P/N:
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
L709
NC(1.8uH)
R713
22R
C707
NC
3V3FE
R716
1K
R717 10K
[8]
Shenzhen Jiuzhou Electric CO.,LD
TUNER & DEMOD
R726 0R
C741
NC
0603
R727 0R
R728 100R
C710
22nF
Close to tunerClose to Demod
DESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:
SIZE:
[8]
[8]
C708
C709
NC
NC
C742
104
MODEL NO.:
PROJECT CODE:
DOC. REV.:
Xuewei 2011-12-19
A2
[8]
SHEET:
IP_Q
IM_Q
IFAGC
V1.1
811
B
A
SIGN
DATE
SIGN
DATE
SIGN
DATE
SIGN
DATE
OF
Page 30
564
3
REV.
1
2
HISTORY OF MODIFICATIONS
2
1
APP.BYDATECHECK.BY
D
6
VDDCR
QFN24P
LED1/REGOFF
LED2/NINTSEL
XTAL1/CLKIN
VSS/FLAG
LED2/NINTSEL
LED1/REGOFF
R656 75R
R676 300K
EDVDD3_3V
R677 0R
[3]
[9]
[9]
[9]
[9]
[9]
[9]
R683 33R
R684 1M
Y651 25MHz
C664
30P
Note:
C674
VDDCR decoupling capacitors and
4.7uF
test point should be placed as close
0603
to LAN8720 as possible.
J651
13
LED0+14LED0-
15
LED1+16LED1-
1
TX+
2
TX-
4
TXCT
5
RXCT
3
RX+
6
RX-
7
NC
8
CH_GND
11
GND
12
GND
9
10
98LEDC03-1X1 TP/RJ45
GND_EARTH
ETH_RST
MDIOTX+
MDIOTXMDIORX+
MDIORX-
LED1/REGOFF
LED2/NINTSEL
R660
510R
C665
30P
R661
510R
Shenzhen Jiuzhou Electric CO.,LD
DESCRIPTION
PAGE DESCRIPTION
DOC.NO.:
SCH P/N:
PCB P/N:
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
47P
C122
VCC3_3V_PM
[3]
1K
1K
0805
C123 47P
B
R194
L122 600R
L123 600R
L124
L125 600R
47P
C124
VCC5V
R123
10K
C
Q121
3904
E
R125
4K7
S
R193 NC(330R)
330R
B
VCC5V
G
VCC3_3V_PM
600R
B
R126
100R
Q123
BS870
VCC3_3V_PM
B
E
C
DESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:
CHECK.BYDATEAPP.BY
[3,10]
[10]
[10]
[10]
R124
10K
C
Q122
3904
E
VCC5V
R127
4K7
D
[10]
C
Q191
3904
E
Q192
3906
R196
220R
SIZE:
1
IR
FP_CL_FRONT
FP_DAT_FRONT
FP_STB_FRONT
[10]
FP_CL_FRONT
[10]
FP_STB_FRONT
FP_DAT_FRONT
R195
1K
MODEL NO.:
PROJECT CODE:
DOC. REV.:
Xuewei
A2
D191
RED
3
1
GREEN
2011-12-19
SHEET:
2
V1.1
10 11
D
C
B
A
SIGN
DATE
SIGN
DATE
SIGN
DATE
SIGN
DATE
OF
Page 32
465
3
REV.
1
2
2
HISTORY OF MODIFICATIONS
1
CHECK.BYDATEAPP.BY
AC-DC
RT901
D
3PIN 3.96MM
10D-9
CN902
2
1
!
F902
T1AL 250V
Fuse
C
D912
IN4007
D911
IN4007
D914
IN4007
R915
1M 1206
1M 1206
D913
IN4007
D910
IN4007
R916
104 0603
C917
快速放电电路
R917
470K 0603
D915
IN4148
10uF/400V
C910
B
104 0603
!
LF902
34
12
UU9.8
E
Q902
8550
C
C918
R918
1.6K 0603
C911
22uf/400v
C913
472/1KV
6
8S753
TNY176DG
S
R921
R922
200K 1206
200K 1206
D916
1N4007
4
D
D
R920
1
EN
EN
U901
470R 0603
R930
2
BP
BP
10K 0603
C1
C912
10uf/50v
NC 0805
D920
1N4148
C920
104 0805
2
1
3
4
5
50V
!
T901
KB1025-15582
!
CY902 1000P
R919
100K 0603
C921
R928
10
22R 0805
6
7
9
8
D918
18V
102 0805
D917
1N5822
D919
NC
!!
U902
1
4
2
3
LTV-817-C
U903
TL431
R924
100R 0805
R923
1K 0603
23
1000uf/16v
R925
1K 0603
1
L902
4.7uH/2A
C916
C915
470uf/16v
C914
104 0603
R1
NC 0603
10K 0603
VCC5V
R927
R926
9.53K 0603
D
C
B
Shenzhen Jiuzhou Electric CO.,LD
DESCRIPTION
A
AC-DC
DOC.NO.:
SCH P/N:
PCB P/N:
THIS DOCUMENT IS THE PROPERTY OF Shenzhen
Jiuzhou Electric CO.,LD. THE CONTENTS OF THIS
DOCUMENT ARECONFIDENTIAL AND CONTSTITUTE
TRADE SECERTSPROPRIETARY TO Shenzhen Jiuzhou
Electric CO.,LD.
NEITHER THIS DOCUMENT NOR ITS CONTENTS SHALL
BE DISCLOSED TO ANY UNAUTHORIZED PERSON.
COPIED OR PUBLISHED WITHOUT Shenzhen Jiuzhou
Electric CO.,LD.'S PRIOR WRITTEN CONSENT.
COPYRIGHT C 2011 Shenzhen Jiuzhou Electric CO.,LD
1, Testing the chip and the DEMOD's crystal frequency(Y401 Y701) with a frequency
spectrograph, to make sure it's within ±20PPM(±480HZ);
2, If there is a heavy mosaic when your STB works, or even NO SIGNAL, please change
the crystal in the TUNER; and if that fails, change the Tuner module directly.
Page 43
3, If the fuse blew out, please change the F902 and check the D910,D911,D912,D913,to
see if they are burnout.
Page 44
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