SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
CAUTION:
Before servicing this chassis, it is important that the service technician read the “Safety
Precautions” and “Product Safety Notices” in this service manual.
No. 0266
L19DG07U
L22DG07U
Data contained within this Service
manual is subject to alteration for
improvement.
ATTENTION:
Avant d’effectuer l’entretien du châssis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise
zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.
FOR ALL PARTS PLEASE MAKE
CONTACT WITH ASWO.
FOR YOUR LOCAL OUTLET GO TO
Les données fournies dans le présent
manuel d’entretien peuvent faire l’objet
de modifications en vue de perfectionner
le produit.
Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
www.aswo.com
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
DVD Problems ......................................................................................................................... 70
25.10.No Signal Problem ................................................................................................... 71
1. INTRODUCTION
17MB60 mainboard is driven by MStar SOC. This IC is capable of handling Video and
audio processing, Scaling-Display processing, 3D comb filter, OSD and text processing,
LVDS transmitting, channel and MPEG2/4 decoding, integrated DVB-T/C demodulator
and media center functionality.
TV supports PAL, SECAM, NTSC colour standards and multiple transmission standards
as B/G, D/K, I/I’, and L/L’ including German and NICAM stereo. Also DVB T, DVB-C are
supported internal demoulators of Mstar IC and DVB-T2 is supported with externall
demodulator.
Sound system output is supplying max. 2x2,5W ( less 10%THD at max output) with 4
speakers or 2x6W for stereo 8VSHDNHUV
Supported peripherals are:
1 RF input VHF I, VHF III, UHF @ 75Ohm(Common)
1 Side AV (CVBS, R/L_Audio)
1 SCART socket(Common)
1 YPbPr (Optional)
1 PC input(Common)
2 HDMI 1.3 input(1 HDMI input is common, 1 input is optional)
1 S/PDIF output(Optional)
1 Headphone(Optional)
1 Common interface(Common)
1 USB(Common)
1 DVD(Optional)
1 iPod(Optional)
1 On-board Keypad(Optional)
1 External Keypad(Optional)
1 External TouchPad(Optional)
1.1.General Block Diagram
1.2.MB60 Placement of Blocks
(
)
External
Keyboard
Touchboard
DVD
Connector
CI Connector
Power Connector
Nand
Flash
(U162)
Connectors
DDR2
RAM
(U154)
LVDS
USB
Saw
Filters
Main IC
(U157)
DDR2
RAM
(U155)
SPI
Flash
Ethernet
IC
U171
Keypad
Tuner(TU102)
HDMI
Connectors
Ethernet
Connector or
Adapter DC
Input
YPbPrSAVHP
SCART
Connector
VGA
SPDIF
Out
Speaker
Con.
Led
Con
Inv.
Con
1. TUNER(TU102)
A horizontal mounted and Digital Half-Nim tuner is used in the product, which covers 3
Bands(From 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR CH).
The tuning is available through the digitally controlled I2C bus (PLL). Below you will find
info about the tuner.
In active antenna option, the following circuit are used. ANT_CTRL pin is controlled by
microcontroller. If ANT_CTRL is low, ANT_PWR will be low. If ANT_CTRL is high,
ANT_PWR will be high.
OVER_CUR_DETECT pin is a monitor for short circuit in antenna. OVER_CUR_DETECT
is low, ANT_CTRL will be low, so ANT_PWR will be low. Finally, short circuit protection is
done by circuits and microcontroller.
1.1.General description of Samsung DTOS403LH122X:
The Tuner covers 3 Bands(from 48MHz to 862MHz for COFDM, from 45.25MHz to
863.25MHz for CCIR CH). Band selection and Tuning are performed digitally via the I2C
bus.
1.2.Features of DTOS403LH122X:
x Receiving System: This TUNER is designed to cover the air channels in VHF and
UHF, compliant with DVB-T standard. and It covers all Analog channels from
x Input Impedance: 758QEDODQFHG
x Band Change-Over System
PLL Control System
x Tuning System
Electronic Tuning System With PLL
x Internal(or External) RF AGC function
Built in wideband AGC detector with 6 programmable take-over points
1.3.Pinning:
Terminal
Pin no.
10IF OUT +Output 2 of the IF Amplifier
11IF OUT -Output 1 of the IF Amplifier
12AIF OutputIF output of the Analog BroadBand
NamePin Description
1Ant PowerActive Antenna Power
2B++5V, Supply Voltage (Preamplifier, DC/DC)
3RF AGCRF AGC (internal or external mode)
4CLI2C Serial Clock
5DAI2C Serial Clock
6BP+5V, Supply Voltage (RF Amp, PLL, IF Amp)
7BT(T.P)+33V, within DC/DC circuit
8ASI2C Address Selection of the PLL
9IF AGCControl voltage for the IF AGC
2. SAW FILTER – Audio – Epcos K9656M(Z101)
2.1.Standart
xB/G
xD/K
xI
xL/L’
2.2.Features
x TV IF audio filter with two channels
x Channel 1 (L’) with one pass band for sound carriers at 40,40 MHz (L’) and 39,75
MHz (L’- NICAM)
x Channel 2 (B/G,D/K,L,I) with one pass band for sound carriers between 32,35 MHz
AVdd=DVdd=5.5Volt)with high efficiency filter-free class-D audio power amplifier in a
1613 mm x 1613 mm wafer chip scale package (WCSP). AZAD2102B uses Currentswitch technology to achieve high performance class-d amplifier that features 0.03%
THD, 85% efficiency, –70 dB PSRR, to improve RF-rectification immunity.
AZAD2102B provide a Vibration-Spectrum modulation clock for PWM Output. This
vibration frequency is around 10KHZ shift (+/- 5KHZ of Fpwm).
The advantage of the small size package (WCSP) makes AZAD2102B very suitable for
mobile phone and PDA device application. And the Class-D amplifier structure let
AZAD2102B to have highly efficiency power consumption than Class-AB amplifier.
AZAD2102B can shrink the application board, reduce system cost, and external
components.
ESD level protection I/O embedded in AZAD2102B. For general applications, doesn’t
need to add extra ESD protection device (like Varistors) in application system for
AZAD2102B’s I/O.
4.2.Features
x CMOS Technology
x High Efficiency 85%
x High PSRR 70dB at 217Hz
x Differential OP-amp Input
x AZAD2102B provides Vibration-Spectrum Modulation clock for reduce EMI
x Provide Mute function(set Mute_B to GND will go into Mute status)
x For the input stage AZAD2102B built-in a 10Kohm resistors (Gain setting=29.5dB)
x Maximum Battery Life and Minimum Heat
x Efficiency With an 8-ȍ6SHDNHU
x 3.5 mA Quiescent Current
x Output Power at 10% THD
x :DWWVDW$9GG '9GG 9ROW5ORDG ȍ
x 1.45WatWVDW$9GG '9GG 9ROW5ORDG ȍ
x :DWWVDW$9GG '9GG 9ROW5ORDG ȍ
x :DWWVDW$9GG '9GG 9ROW5ORDG ȍ
x :DWWVDW$9GG '9GG 9ROW5ORDG ȍ
x :DWWVDW$9GG '9GG 9ROW5ORDG ȍ
x Eliminate Power on and Power-off “Pop” noise
x A Fewer External Components
x Optimized PWM Output Stage Eliminates LC Output Filter
x Internally generate 290 kHz Switching Frequency to eliminate Capacitor and
Resistor
x Improve PSRR (–70 dB) and Wide Supply Voltage (3.0 V to 5.5 V)
x Fully Differential Design Reduces RF Rectification
x This chip has been built-in a very strong ESD protection.
x System level ESD 4KV (IEC 61000-4-2 ESD Contact Level)
x Wafer Chip Scale Package (WCSP)
x TSSOP Package with Exposed Pad
4.3.Absolute Ratings
4.3.1.Electrical Characteristics
4.3.2.Operating Specifications
4.4.Pinning
5. AUDIO AMPLIFIER STAGE WITH TPA3113(U168)
5.1.General Description
17MB60 uses a 6W Class D Mono Audio Amplifers for from 26” to 32” TVs. The
TPA3113D2 is a 6-W (per channel) efficient, Class-D audio power amplifier for driving
bridged-tied stereo speakers. Advanced EMI Suppression Technology enables the use of
inexpensive ferrite bead filters at the outputs while meeting EMC requirements.
SpeakerGuard™ speaker protection circuitry includes an adjustable power limiter and a
DC detection circuit. The adjustable power limiter allows the user to set a "virtual" voltage
rail lower than the chip supply to limit the amount of current through the speaker. The DC
detect circuit measures the frequency and amplitude of the PWM signal and shuts off the
output stage if the input capacitors are damaged or shorts exist on the inputs.
The TPA3113D2 can drive stereo speakers as low as 4
TPA3113D2, 87%, eliminates the need for an external heat sink when
playing music.
The outputs are also fully protected against shorts to GND, VCC, and output-to-output.
The short-circuit protection and thermal protection includes an auto-recovery feature.
ȍ. The high efficiency of the
5.2.Features
x 6-W/ch into an 8-ȍ Loads at 10% THD+N From a 10-V Supply
x 12-W into a 4-ȍ Mono Load at 10% THD+N From a 10-V Supply
x 87% Efficient Class-D Operation Eliminates Need for Heat Sinks
x Wide Supply Voltage Range Allows Operation from 8 V to 26 V
x Filter-Free Operation
x SpeakerGuard™ Speaker Protection Includes Adjustable Power Limiter plus DC
Protection
x Flow Through Pin Out Facilitates Easy Board Layout
x Robust Pin-to-Pin Short Circuit Protection and Thermal Protection with Auto
Recovery Option
x Excellent THD+N / Pop-Free Performance
x Four Selectable, Fixed Gain Settings
x Differential inputs
5.3.Absolute Ratings
5.3.1.Electrical Characteristics
5.3.2.Operating Specifications
5.4.Pinning
6. POWER STAGE
The DC voltages required at various parts of the chassis and panel are provided by a
main power supply unit. MB60 chassis can operate with IPS60, IPS16, IPS17, PW26,
PW27 as main power supply and also with 12V adaptor.
CN706 is used for IPS60, IPS16 and IPS17 and CN1 is used for PW26 and PW27.
JK9 is used for the adapter option and also CN705 inverter socket or DB32 chassis with
CN706 is used to supply backlight.
The power supplies generate 18V, 12V, 5V, 3,3V and 12V, 5V, stand by mode DC
voltages. Power stage which is on-chassis generates 5V, 3V3 stand by voltage and 12V,
8V, 5V, 3V3, 2.5V, 1,8V and 1,2V supplies for other different parts of the chassis. Chassis
block diagram is indicated below.
The blocks on power block diagram is using dependent to main supply. For PW26 and
PW27 just common blocks are enough for proper operation.
For IPS16, IPS17, IPS60 below blocks must work properly.
For adopter case also below blocks are necessary.
Short CCT Protection Circuit
Short circuit protection is necessary for protecting chassis and main IC against damages
when any Vcc supply shorts to ground. Protect pin should be logic high while normal
operation. When there is a short circuit protect pin shold be logic low. After any short
detection, SW forces LEDs on LED card to blink.
6.1.Power Management
7. MICROCONTROLLER – MSTAR(U157)
7.1.General Descripction
The MSD9WB7PX-2 integrates DTV/multi-media all-purpose AV decoder, DVB-T
demodulator, VIF demodulator, and Sound/Video processor into a single device. This
allows the overall BOM to be reduced significantly making the MSD9WB7PX-2 a very
competitive multi-media DTV solution. For ATV users, the MSD9WB7PX-2 provides multistandard analog TV support with adaptive 3D video decoding and VBI data extraction.
The build-in audio decoder is capable of decoding FM, AM, NICAM, A2, BTSC and EIA-J
sound standards. The MSD9WB7PX-2 supplies all the necessary A/V inputs and outputs
to complete a receiver design including a multi-port HDMI receiver and component video
ADC. All input selection multiplexed for video and audio are integrated, including full
SCART support with CVBS output. The equipped MStar MACE-5 color engine is the
latest masterpiece from MStar famous color engine series providing excellent video and
picture quality in Full-HD and large-scale displaying system. To meet the increasingly
popular energy legislative requirements without the use of additional hardware, the
MSD9WB7PX-2 has an ultra low power standby mode during which an embedded MCU
can act upon standby events and wake up the system as required.
7.2.General Features
MSD9WB9PX-2, an SOC solution that supports channel decoding, MPEG decoding, and
media-centre functionality enabled by a high performance AV CODEC and CPU Key
features include,
x Digital and Analog DVB Front-End Demodulator
x A Multi-Standard A/V Format Decoder
x The MACE-5 Video Processor
x Home Theater Sound Processor
x Peripheral and Power Management
Transport Stream De-multiplexer
x Supports parallel and serial TS interface, with or without sync signal
x Supports TS input and output for external CI module
x Maximum TS data rate is 104 Mb/sec for serial or 16 MB/sec for parallel
x 32 general purpose PID filters and section filters for each transport stream de-
multiplexer
x Supports additional audio/video/PCR filters
x Supports TS DMA channel for time-shift
x Supports 3DES/DES and AES encryption/decryption
MPEG-2 Video Decoder
x ISO/IEC 13818-2 MPEG-2 video MP@HL
x Automatic frame rate conversion
x Supports resolution up to HDTV (1080i, 720p) and SDTV
MPEG-4 Video Decoder
x ISO/IEC 14496-2 MPEG-4 ASP video decoding
x Supports resolutions up to HDTV (1080p@30fps)
x Supports DivX1 Home Theater & HD profilesOptional
x Supports VC-1Optional, FLV video format decoding
H.264 Decoder
x ITU-T H.264, ISO/IEC 14496-10 (main and high profile up to level 4.1) video
decoding
x Supports resolutions for all DVB, ATSC, HDTV, DVD and VCD
x Supports resolution up to 1080p@30fps
x Supports CABAC and CAVLC stream types
x Processing of ES and PES streams, extraction and provision of time stamps
x Up to 40 Mbits bitrate (Blu-ray spec.)
Hardware JPEG
x Supports sequential mode, single scan
x Supports both color and grayscale pictures
x Following the file header scan the hardware decoder fully handles the decode
process
x Supports programmable Region of Interest (ROI)
x Supports formats: 422/411/420/444/422T
x Supports scaling down ratios: 1/2, 1/4, 1/8
x Supports picture rotation
NTSC/PAL/SECAM Video Decoder
x Supports NTSC-M, NTSC-J, NTSC-4.43, PAL (B, D, G, H, M, N, I, Nc), and
SECAM standards
x Automatic standard detection
x Motion adaptive 3D comb filter
x Five configurable CVBS & Y/C S-video inputs
x Supports Teletext, Closed Caption (analog CC 608/ analog CC 708/digital CC
608/digital CC 708), V-chip and SCTE
Multi-Standard TV Sound Processor
x SIF audio decoding
x Supports BTSC/A2/EIA-J demodulation
x Supports NICAM/FM/AM demodulation
x Supports MTS Mode Mono/Stereo/SAP in BTSC/EIA-J mode
x Supports Mono/Stereo/Dual in A2/NICAM mode
x Built-in audio sampling rate conversion (SRC)
x Audio processing for loudspeaker channel, including volume, balance, mute, tone,
EQ, virtual stereo/surround and treble/bass controls
x Advanced sound processing options available, for example: Dolby, SRS, BBE,
QSound, Audyssey
x Supports digital audio format decoding:
x MPEG-1, MPEG-2 (Layer I/II), MP3, Dolby Digital (AC-3), AAC-LC
x Supports Optional Dolby Digital Plus, Dolby Pulse, and MS10 multistream
decoder, including Dolby Digital Encoder for transcoding streams to Dolby Digital
5.1 (DDCO)
x Supports MPEG Audio, Dolby Digital, Dolby Digital Plus format AD (Audio
Description)
x Supports PVR and time-shifting
Audio Interface
One SIF audio input interface with minimal external saw filters
x Four L/R audio line-inputs including Mic. input
x Two L/R outputs for main speakers and additional line-outputs
x Supports stereo headphone driver
x I2S digital audio input & output
x S/PDIF digital audio output
x HDMI audio channel processing
x Programmable delay for audio/video synchronization
Analog RGB Compliant Input Port
x Three analog ports support up to 1080P
x Supports PC RGB input up to SXGA@75Hz
x Supports HDTV RGB/YPbPr/YCbCr
x Supports Composite Sync and SOG Sync-on-Green
x Automatic color calibration
x AV-link support
Analogue RGB Auto-Configuration & Detection
x Auto input signal format and mode detection
x Auto-tuning function including phasing, positioning, offset, gain, and jitter detection
x Sync Detection for H/V Sync
DVI/HDCP/HDMI Compliant Input Port
x Three HDMI/DVI Input ports
x HDMI 1.3 Compliant
x HDCP 1.1 Compliant
x 225MHz @ 1080P 60Hz input with 12-bit Deep-color support
x CEC support
x Single link DVI 1.0 compliant
x Robust receiver with excellent long-cable support
MStar Advanced Color Engine (MStarACE-5)
x 10/12-bit internal data processing
x Fully programmable multi-function scaling engine
x Nonlinear video scaling supports various modes including Panorama
x Supports dynamic scaling for VC-1
x High-Quality DTV video processor
x 3D motion video deinterlacer with motion object stabilizer
x Edge-oriented deinterlacer with edge and artifact smoother
x Automatic 3:2/2:2/M:N pull-down detection and recovery
x 3D multi-purpose noise reduction for DTV or lousy air/cable input
x MPEG artifact removal including de-blocking and mosquito noise reduction
x Arbitrary frame rate conversion
x MStar Professional Picture Enhancement:
o Dynamic brilliant and fresh color
o Dynamic Blue Stretch
o Intensified contrast and details
o Dynamic Vivid Skin
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