[4] IR SCHEMATIC DIAGRAM .................................................................................................................................... 74
CHAPTER 9. Parts Guide
[1]SPARE PARTS LIST .............................................................................................................................................. 75
[2] CABINET PARTS ................................................................................................................................................... 79
Does not the picture come out when VHF/UHF is received?
MAIN UNIT:
Check TU_VCC is applied to Tuner or not?
Is the DIF signal output from pin (8) and pin (9) of
TUNER(TU7001)?
Is the DIF signal sent to pin (P29) and
pin (P28) of IC U502?
Refer to “The picture doesn't appear in all modes.”
YES
YES
YES
NO
NO
NO
Check each power IC and peripheral
components are correct or not.
Check the tuner and its peripheral circuits.
Replace as required.
Check circuit between TU7001 and IC
U502, then check the peripheral circuits of
IC U502.
32
<External Input (HDMI_1)>No picture on the display (3)
Does not the picture display when HDMI cable plugged into HDMI_1?
Is the HDMI1_HPD detection function of
Terminal
pin (19) of HDMI terminal (CN620)
normal?
NO
YES
MAIN UNIT:
Is TMDS signal input into pin
HDMI3_RX2+,HDMI3_RX2-,
HDMI3_RX1+,HDMI3_RX1-
HDMI3_RX0+,HDMI3_RX0-
NO
HDMI3_RC+,HDMI3_RC-,of IC U502?
YES
Refer to “The picture doesn't appear in
all modes.”
Check the circuit between pin K29) of
IC U502 and CN620.
Check the connection and setup with
the external HDMI devices.
Check the circuit between IC U502
and CN620.
33
<External Input (HDMI_2)>No picture on the display (4)
Does not the picture display when HDMI cable plugged into HDMI_2?
Is the HDMI2_HPD detection function of
pin (19) of a HDMI terminal (CN621)
normal?
NO
Check the circuit between pin (K28) of
IC U502 and CN621
MAIN UNIT:
Is TMDS signal input into pin
HDMI2_RX2+, HDMI2_RX2-,
HDMI2_RX1+, HDMI2_RX1-
HDMI2_RX0+, HDMI2_RX0-
HDMI2_RC+ , HDMI2_RC-, of IC
U502?
YES
YES
NO
Check the connection and setup with
the external HDMI devices.
Check the circuit between IC U502
and CN621
Refer to “The picture doesn't appear in
all modes.”
34
and CN
624.
<External Input(HDMI_3)>No picture on the display (5)
Does not the picture display when HDMI cable plugged into HDMI_3?
Is the HDMI3_HPDO detection function
NO
of pin (19) of a HDMI terminal (CN624)
normal?
MAIN UNIT:
Is TMDS signal input into pin
HDMI0_RX2+, HDMI0_RX2-,
HDMI0_RX1+, HDMI0_RX1-
HDMI0_RX0+, HDMI0_RX0-
HDMI0_RC+ , HDMI0_RC-, of IC
YES
NO
YES
Refer to “The picture doesn't appear in
all modes.”
Check the circuit between pin (K27) of
IC U502 and CN624
Check the connection and setup with
the external HDMI devices.
Check the circuit between IC U502
35
and CN
623.
<External Input(HDMI_4)>No picture on the display (6)
Does not the picture display when HDMI cable plugged into HDMI_4?
Is the HDMI3_HPDO detection function
NO
of pin (19) of a HDMI terminal (CN624)
normal?
MAIN UNIT:
Is TMDS signal input into pin
HDMI1_RX2+, HDMI1_RX2-,
HDMI1_RX1+, HDMI1_RX1-
HDMI1_RX0+, HDMI1_RX0-
HDMI10_RC+, HDMI1_RC-, of IC
YES
NO
YES
Refer to “The picture doesn't appear in
all modes.”
Check the circuit between pin (K27) of
IC U502 and CN623
Check the connection and setup with
the external HDMI devices.
Check the circuit between IC U502
36
<External input USB>No picture on the display (7)
Does not the picture display when USB cable plugged into USB port?
Is USB stick video format correct?
NO
Change to correct .jpg or .jpeg or .png or
.bmp format.
MainUNIT:
Is the USB +5V sent to pin (1) of
CN6501?
YES
NO
Check the U6501 power manager V-in
and V-out and power enable function.
YES
Is the USB con (CN6501) signal properly
sent to pin (A17) (D2_P) and pin pin
(B17) (D2_N) of IC U502?
NO
Check the circuit between CN6501 and
IC U502
YES
Refer to “The picture doesn't appear in
all modes.”
37
device that connects of CN
6101
CN
6101
<External Input (Component)>No picture on the display (8)
Does not the picture display when RCA cable plugged into component?
Is Component Y/Pb/Pr signal sent to pin
(2)/Y, (4)/Pb, (6)/Pr of CN6101?
NO
Check the setting of an external input
MAIN UNIT:
Is Component Y/Pb/Pr signal sent to pin
(W27)/Y0p, (W30)/Pb0p, (U28)/Pr0p of
IC U502?
YES
NO
Check the circuits between IC U502 and
YES
Refer to “The picture doesn't appear in
all modes.”
38
Power unit operation check for E70-C3
YES
Are the power cord and harness in the
unit
NO
Power cord and harness in the unit
connected
YES
If F1 normal
Does DB1 output 155V when AC
input 110V?
Is the voltage of +12V applied to pin
4,8,9,14 of CN201?
Is PFC output 370V as for power on/off
switch when is on?
Is VLED output 24V as for power on/off
switch when is on?
?
YES
YES
YES
YES
NO
NO
NO
NO
NO
Line filter unit? L1 ,L2,L3 or RT1,RT2 is
out of order?
Change a new full-wave rectifier diode to
check the output voltage.
Does the standby circuit normal?. (Q1, T1,
D201 , D2 , Q201,Q202,Q204,Q205 & the
circuit around the U1 and protection circuit
ect. is checked)
Does the U101 , Q103 ,T101,D105 and the
circuit around IC U101?or Q104,U102?
Check them.
Does the U301,T301, Q301, Q302,
D303,D304 and the circuit around IC
U301?or Q104,U102? Check them.
39
CHAPTER5. MAJOR IC INFORMATIONS
[1]MAJOR IC INFORMATIONS
1.1. U502 (
The Sigma Designs’ V6 7602, is an integrated 60/120Hz Multi-Format Decoder smart TV SoC with
all the key technologies required for advanced connectivity. This single-chip solution supports
channel decoding, audio decoding and encoding, video decoding, audio and video
post-processing, 3D formatting, quad LVDS output, and smart TV functionality, enabled by a
high-performance CPU and GPU. Features include ATSC/DVB-T/DVB-C/ISDB-T and analog
demodulators, a secure programmable transport stream demultiplexer, high-performance 3D
graphics, 3DTV-capable video decoder, programmable audio decoder, and video post-processor
based on Sigma Designs’ industry-leading video processing algorithms. V6 7602 is ready for the
next generation of smart TVs by supporting advanced 2D to 3D conversion, FHD video processing,
and full-screen 16:9 support with uncompromising picture quality. A 1.2GHz ARM A9 dual-core
host CPU enables advanced connectivity and OTT services for the next generation smart TV. A
quad-core ARM Mali GPU provides fast 2D/3D graphics acceleration. To enable fast time to
market, V6 7602 comes with production-proven software solutions for all major geographical
regions
V6 7602B0 CFE3
)
Key Features
• Dual-core A9 with 512KB L2 cache
• Quad-core ARM MALI 3D GPU
• Secure CPU with ARM trust zone
• Simultaneous 2x HDMI RX for PIP/POP
• DVB-C/ATSC/DVB-T/ISDB-T channel demodulator
• Analog VIF and SIF demodulator
• Multi-format audio/dual FHD video decoder
• Advanced audio/FHD video processing
• 3D formatter
• Peripheral and power management
1.2. U505, U506 , U507(
Description
The 2Gb Double-Data-Rate-3 (DDR3(L)) B-die DRAM is double data rate architecture to achieve
high-speed operation. It is internally configured as an eight bank DRAMs.
The 2Gb chip is organized as 32Mbit x 8 I/Os x 8 banks or 16Mbit x 16 I/Os x 8 bank devices.
These synchronous devices achieve high speed double-data-rate transfer rates of up to 1866
Mb/sec/pin for general applications. The chip is designed to comply with all key DDR3(L) DRAM
key features and all of the control and address inputs are synchronized with a pair of externally
supplied differential clocks. Inputs are latched at the cross point of differential clocks (CK rising and
2Gb DDR3 SDRAM F-Die
)
40
CK falling). All I/Os are synchronized with a single ended DQS or differential DQS pair in a source
synchronous fashion. These devices operate with a single 1.5V ± 0.075V and 1.35V
-0.067V/+0.1V power supply and are available in BGA packages.
1.3. U801 (YDA176-QZE2)
YDA176 is a high-performance digital audio amplifier IC that delivers up to 15W×2ch,
which has a digital audio interface, and is capable of operating at a supply voltage ranging from
5V*1) to 18V. YDA176, with Yamaha original Pure Pulse Direct Speaker Drive Circuit, allows
a speaker to be directly connected to the output. In addition, this amplifier is insusceptible to supply
voltage fluctuation because of a feedback-type digital amplifier, and have the feature with high
power supply noise tolerance.As a result, power supply can be simplified and allowing a simple
amplifier system with less external components to be configured. YDA176 has the following
functions: gain setting function, power limit function, pop noise reduction function, over current
protection function for speaker output pins, internal over temperature protection function, under
voltage lockout, and DC detection function.
41
CHAPTER 6.BLOCK DIAGRAM/WIRING DIAGRAM
[1]BLOCK DIAGRAM
42
AC INPUT
L6564
[2]POWER MANAGEMENT BLOCK DIAGRAM
There are 1 part circuits in Power board of this project (fig.1), Power circuits which is a single layer board,
There are 2 output in the power parts, one is interface board including audio and TV tuner et; the other is
converter board circuit.+24V output is converter part. The system block diagram as below; the last is
panel Vcc and audio, the power is 12V.
Fly back
IC:TEA1733
DC output
12V (T-con)
12V (Audio)
DCM PFC
12V (Regulation)
IC:
PQ3813
Converter
LED OUTPUT
IC:SCC9522
DC output
LED_OUT:
24V
EFD50
43
[3]WIRING DIAGRAM
E70-C3
44
CHAPTER 7.PRINTED WIRING DIAGRAM
[1]MAIN UNIT PRINTED WIRING BOARD
TOP :E70-C3
45
BOTTOM:
E70-C3
46
[2]POWER SCHEMATIC DIAGRAM- POWER BOARD WITH TOP/BOTTOM VIEW
Top Layer
47
Bottom Layer
48
[3]KEY UNIT PRINTED WIRING BOARD
E70-C3
[4] IR+LED+ALS UNIT PRINTED WIRING BOARD
E70-C3
49
CHAPTER 8.SCHEMATIC DIAGRAM
[1]MAIN SCHEMATIC DIAGRAM
01 System POWER I
50
02 System POWER II
51
03 YPBPR AV INTERFACE
52
04 HDMI Interface
53
05 RF Silicon Tuner
54
06 Peripheral
55
07 Audio
56
08 Speaker
57
09 Panel LVDS Interface
10
V6 7602B0 CFE3
DRAM Interface
58
11
V6 7602B0 CFE3
MII/GPIO/ServAD
59
12 V6 7602B0 CFE3 USB HUB & WIFI
60
13 V6 7602B0 CFE3 Power
61
14 V6 7602B0 CFE3 UI Interface
15 V6 7602B0 CFE3 LED Driver
62
[2]POWER SCHEMATIC DIAGRAM
1) AC Input and EMI Filter:(fig.7)
Fig.7
CN1 is a connector for connecting AC Power.F1 is fuse to protect all the circuit AC. Input
voltage is single 110V. CY1, CY2, CY3, CY4 are used high frequency noise of primary between
common GND.L4,L5,L6,CX1, CX2 is used to filter low frequency noise. R1,R2,R3,R4 are used to
discharge CX1 and CX2 remnants voltage.
DB1 is a rectifier in which there are 4 build-in diodes, inverting AC to DC. C101 is used to
smooth the wave from rectifier. RT1 & RT2 is a fuse resistor to protect the following circuit when
inrush current is too large.
63
2) Flyback Control(fig.8) & LED Circuit:(fig.9)
Fig.8
Fig.9
.
64
U1 is a low cost Switched Mode Power Supply (SMPS) controller IC intended for flyback
topologies.U1 operates in fixed frequency mode. To reduce EMI, frequency jitter has been
implemented. For Continuous Conduction Mode (CCM) operation, slope compensation is
integrated. The controller can be set to accept an over-power situation for a limited amount of time.
In a typical application the mains input voltage can be detected by the VSENSE pin. As long
as the voltage on VSENSE has not reached the Vstart(VSENSE) voltage (typ.0.93V), switching is
inhibited. When during operation the VINSENSE voltage drops below Vlow(VSENSE) (typ. 0.69V)
or exceeds Vhigh(VSENSE) (typ.3.5V), the converter stops switching and performs a restart.If the
pin is left open or disconnected, the pin is pulled up by the internal 20nA (typ.) current source and
subsequently the Vhigh(VSENSE) level is reached. This will than trigger a restart protection. An
internal clamp of 4.6 volts (typ.) protects this pin from excessive voltages.
In the example given, the PROTECT pin (pin 6) is used for over-voltage protection (OVP) .
The OVP level is VCC = 25.8 V, The VSENSE pin (pin 5) is used for mains under voltage lock-out
and is set by R5,R6,R7 and R8 to about 80 Vac. The over-power protection time,defined by C10, is
set to 60msec.The restart time, defined by C10 and R25, is set to 0.5 sec.R18 and C13 define the
soft-start time. R18 is added to prevent the soft-start capacitor from being charged during normal
operation due to negative voltage spikes across the current sense resistor R22,C14 is added to
reduce the noise on the CTRL pin. R19 reduces the peak current to C5. U1 control 12V output ,
U2,U402,U201,Q201,Q202,Q204,Q205,Q401,Q402,L201, construct buck circuit to output 12V.
The function of LED Driver circuit is control backlight(on/off) as received AC
signal(on/off). When AC on, LED Driver circuit will output a low voltage to main board, and
main board will drive backlight on. Vice versa for AC off, LED Driver circuit will output a high
voltage to main board, and main board will turn off backlight.
U301 is the SSC9522S is the present specifications shall apply to a Monolithic IC
type SSC9522S for switching regulators.
Pin1 is Vsen: Detection of input AC line voltage terminal, Detection of input AC line
voltage.Pin2 is VCC: Power supply terminal,Supply voltage for control. Pin3 is FB: Feed
back terminal,Control for output/detection of over load.Pin5 is Css: Soft start capacitor
terminal, Terminal for connection of capacitor for soft start.