Sony KDL-46S3000, KDL-40S3000, KDL-32SL130, KDL-32S3000, KDL-26S3000 User Manual
...
Training Manual
KDL46S3000
WAX3 Direct-View LCD Television Chassis
Circuit Description and Troubleshooting Guide
MODELS: KDL-26S3000 KDL-32XBR4
KDL-32S3000 KDL-32SL130
KDL-40S3000 KDL-40SL130
KDL-46S3000
Course : CTV-41
Table of Contents
Chapter 1 – Features and Circuit Descriptions ................. 2
Introduction ...................................................................... 2
Features .......................................................................... 2
New Customer Menu .............................................................. 2
Internet Video Linking ............................................................. 2
HDMI 1.3 Support ................................................................... 2
Bravia™ Theater Sync ............................................................ 3
1080p Input ............................................................................. 3
Circuit Description ........................................................... 4
Overall Block Diagrams ................................................... 4
26 and 32-inch S-Line Models ............................................. 4
Backlight Inverter .................................................................... 4
Power Supply .......................................................................... 4
BU1 Board .............................................................................. 4
40 and 46-inch S Line Models ............................................. 6
Backlight Power ...................................................................... 6
Power Supply .......................................................................... 6
32” XBR and 40D3000 Models ............................................ 6
Video Processing ........................................................... 10
New Trident Processor .......................................................... 10
Video Switching ..................................................................... 10
Digital Tuner .......................................................................... 10
HDMI Inputs .......................................................................... 10
Audio Processing ........................................................... 13
Analog Audio ......................................................................... 13
Digital Audio .......................................................................... 13
Power Supply and Protection ............................................ 15
BU1 Board Protection ........................................................ 19
Onboard Regulator Protect ................................................... 19
Thermal Protect .................................................................... 19
Panel Protect ........................................................................ 19
Audio Protect ........................................................................ 19
Communications Errors ..................................................... 20
Trident Video Process Failure ............................................... 20
BH Board Communication Error ........................................... 20
BU1 to Panel (S series models) or BU1 to BH (XBR4 and
D3000 series) Communication Error .............................. 20
Protect Table ...................................................................... 22
Chapter 2 – Service and Troubleshooting ....................... 23
Overview ........................................................................ 23
Circuit Board Locations ................................................. 23
Protection ........................................................................... 30
Diagnostics History ............................................................ 31
Clearing the Diagnostics History ........................................... 31
Digital Signal Status ........................................................... 32
New Remote Control Commands ...................................... 32
Service Mode ................................................................. 34
Data Handling .................................................................... 34
Saving (Writing) Data ............................................................ 34
Reading Back of Data ........................................................... 34
Factory Reset ........................................................................ 34
White Balance Adjustments ............................................... 34
QM Service Page ............................................................... 36
Troubleshooting ............................................................. 38
CTV-41 i
Table of Contents (Continued)
Triage Worksheets ............................................................. 38
Troubleshooting Flowcharts ............................................... 38
Initial Contact Flowchart A ..................................................... 45
No Power Flowchart B .......................................................... 46
Protect ModeFlowchart C ..................................................... 47
26/32" Inverter Error Flowchart D ......................................... 48
40/46" Inverter Error Flowchart E .......................................... 49
No Video Flowchart F ............................................................ 50
Video Distortion Flowchart G ................................................ 51
Audio Flowchart H ................................................................. 52
Service Test Points ........................................................ 53
Chapter 3 - Disassembly ................................................... 58
Overview ........................................................................ 58
Inverter Board Removal (26 and 32” Models) ............... 58
26” LCD Panel Removal ................................................ 61
46” Panel Removal ........................................................ 67
CTV-41 ii
Chapter 1 – Features and Circuit Descriptions
Introduction
The WAX3 chassis is one of several LCD Flat Panel designs introduced for
the Bravia™ 2007 model year. It provides for introductory and intermediate
level televisions for the customer to choose from. The following models
utilize the WAX3 chassis:
KDL26S3000
KDL32S3000
KDL32SL130
KDL32XBR4
KDL40S3000
KDL40SL130
KDL40D3000
KDL46S3000
Features
LCD Panels
New Customer Menu
The customer Graphics User Interface (GUI) has been improved to make
navigation of the setup features easier. Icons (similar to those found on
the PSP2) are used extensively. It is known as XMedia Bar™ (pronounced
cross media bar) or XMB for short.
Internet Video Linking
Yet another first for Sony, the Bravia™ model lineup will include a Digital
Media Exchange (DMEX) interface. By attaching an optional interface
device, known as Bravia Internet Video Link™, customers will have the
ability to access internet video entertainment via a broad-band connection.
Local news, weather and traffic along with access to selected digital media
streaming can be viewed on the television independent of a computer.
A special DMEX USB port on the rear of the television will allow bidirectional communication with the Bravia Internet Video Link™ device
via the Xross Media Bar™ feature included in the television. Sony will
partner with selected channels on the internet and these will automatically
appear on the screen for the customer to select.
All LCD panel sizes will be 1280 X 768 (WXGA) resolution. 32” and up
utilizes the Wide Color Gamut Cold-Cathode Fluorescent (WCG-CCFL)
backlighting for increased color uniformity and accurate grey-scales. The
26” model uses conventional fluorescent lights.
The 26 and 32-inch models (with the exception of the 32XBR4) utilize 8-bit
LCD panels. The 40 and 46-inch panels receive 10-bit RGB information.
All panel sizes (except the 32” XBR) are 60FPS refresh rate.
Exclusive to the KDL32XBR4 and KDL40D3000 is Sony’s introduction
of Motionflow™. An additional circuit is included to double the 60HZ
frame resolution from the video process circuits to 120HZ for clear picture
reproduction during rapid moving scenes. In this manual this feature will
be referred to as High Frame Rate (HFR).
CTV-41 2
HDMI 1.3 Support
HDMI version 1.3 has added several features to enhance picture and
audio quality along with bi-directional communication between HDMI
equipped devices. The added features that apply to display products are
as follows:
Speed: Single link bandwidth is increased from 4.9GBS to 10.2GBS
Deep Color™: Increases RGB and component sample level from 24-bit
to 30, 36, and 48 bit.
xvYCC: Removes previous color space limitations to allow for the
reproduction of every color perceivable by the human eye.
CEC: Short for Consumer Electronics Control. Allows communication
among HDMI devices for control. Uses the industry standard A/V link
protocol. For example: Equipment can be set up so that when a DVD disc
is inserted into a player, the television will turn on with the proper input
setting along with the audio equipment turning on and being set for the
proper input and audio format.
The WAX3 model lineup only supports the CEC feature of HDMI 1.3.
Chapter 1 - Features and Circuit Descriptions
Bravia™ Theater Sync
A feature incorporated within the television to utilize the CEC feature of
HDMI 1.3
1080p Input
Unit can receive 1080p source content via the HDMI inputs only. The
1080p signal is scaled to the WXGA panel resolution.
NOTE: Only the 32” XBR and D3000 model will support 24-frame
sources. The S series models support 30-frame only.
CTV-41 3
Chapter 1 - Features and Circuit Descriptions
Circuit Description
Various differences in circuitry occur in the WAX3 chassis line based on
panel size and display features. Virtually all video processing is the same
among the different designs and centers around the BU1 board. From this
point it becomes a matter of what LCD panel size is used, HDMI versus
analog front video inputs and the design of the power supply dedicated to
that model.
The circuit descriptions to follow will differentiate between the models
based primarily on LCD panel size since this will determine what type of
power supply and backlight inverter boards will be used. The KDL32XBR4
and KDL40D3000 are the only models in this chassis line that has an
upgrade in video features including a third HDMI input and High Frame
Rate circuits and panel. This will be described in a separate block
diagram.
Overall Block Diagrams
26 and 32-inch S-Line Models
In Figure 1-1 the overall block diagram of the circuit layout utilized in the
KDL26A3000 and KDL32S3000 is shown. A brief description for each of
the major circuit boards will be given.
each individual backlight lamp. If a lamp were to fail or weaken with age,
or if one or more of the inverters were to fail, an error command will be
detected by the Main Micro on the BU1 board and shut the unit down and
blink the front power LED in groups of 6.
Power Supply
2 power supplies reside on the G board. The 23” model power supplies
are designated G1D whereas the 32” is G1H. Both supplies are relatively
the same aside from current capacity and layout of their protect circuits. A
standby supply runs constantly whenever AC power is applied to provide
12VDC for the main relay and power for the main switching supply.
Standby 3.3 volts is also generated to power the Main Micro on the BU1
board and other circuits that are required to run constantly such as the
remote IR receiver. The main switching regulator provides the majority of
the voltages used within the unit. Further details of the power supplies will
be discussed later in this chapter.
BU1 Board
This board has been redesigned to take on virtually all of the circuits that
were found on 3 boards in last year’s chassis designs. The tuner and ATI
Micro were on separate boards in previous designs but have now been
integrated on the same board with the video process circuits.
Backlight Inverter
These smaller panels use a single inverter/balancer assembly that is part
of the LCD panel in order to provide ballast control for the fluorescent
backlights. 24VDC is provided by the power supply (G1D for the 26” or
G1H for the 32”). This 24 volt source powers the individual inverters to
generate the high voltage (4.5KV to 5KV) necessary to light the fluorescent
backlight lamps. Additional lines for on/off control and inverter failure
feedback are on the same DC voltage connector from the power supply
and are routed to the BU1 board for control and monitoring by the Main
Micro.
The inverter board also contains circuits to monitor the current draw of
Other than the front video inputs applied to the U1 board, all analog and
HDMI input connectors are part of the BU1 board. The Main TV Micro
resides on this board and is responsible for virtually all of the operational
functions of the unit.
Audio switching, digital signal processing and amplification are also
located here. The audio exits the BU1 board to drive the speakers, optical
output, L/R analog out and headphones. Another important feature of the
audio circuits is that all audio sources selected will be output from the
optical transmitter. This was not true in previous Sony designs in which
the optical out only functioned when a digital tuner signal was received.
CTV-41 4
Chapter 1 - Features and Circuit Descriptions
LCD PANEL
(WXGA)
INVERTER
AC IN
OPTICAL OUT
VIDEO 1
COMPOSITE
_Y/C IN
VIDEO 3
COMPOSITE IN
L
R
HDMI 1 IN
HDMI 2 IN
PC IN
VIDEO PROCESS
A/V SWITCH ING
MAIN TV MICRO
AUD IO PR OCESS
/AMP
HDMI MICRO
TUNER
ATI MICRO
IC4500
TRID ENT
VIDEO PROCESSOR
IC7300
ATI
IC2009
AUD IO AMP
BU1
USB FOR DMEX
AND SOFTWARE
UPGRADE
FRONT
INPUTS
U1
VIDEO 2
COMPOSITE IN
COMPONENT 2 IN
ATSC/NTSC
TUNER
COMPONENT 1 IN
COMPONENT 3 IN
IC3001
MAIN TV
MICRO
POWER SU PPLY
G1H
G1D
26"
32
"
IC2002
AUD IO SW
AUD IO DSP
L/R AUDIO OUT
HEADPHONES OUT
CTV-41 5
FIGURE 1-1
26/32” S SERIES OVERALL BLOCK DIAGRAM
Chapter 1 - Features and Circuit Descriptions
40 and 46-inch S Line Models
In Figure 1-2 it is seen that most of the circuits found in the 26/32” models
is the same. Therefore, only the differences will be explained here.
Backlight Power
Separate circuits are used to supply high voltage to the backlight lamps.
These circuits only generate the high voltage needed. Balancer circuit
boards are mounted on the panel to distribute the high voltage and monitor
the current level to each lamp.
The 40” model uses a single D1 board to generate high voltage of
approxiamtely 4.5 to 5KV. The 46” however, requires the use of 2 high
voltage boards due to the longer fluorescent tubes. In this case a D1 and
D2 board is used to supply voltage to both ends of the fluorescent lamps.
This is important to remember when troubleshooting a lamp protection
shutdown problem. If one board fails you will notice that one side of the
screen is lighter that the other before the unit shuts down. The side that is
darker indicates which board is at fault.
IMPORTANT: Even though the 40 and 46” models both use a D1 board,
they are not interchangeable. The D1 board part numbers are different for
the 40 and 46”.
32” XBR and 40D3000 Models
All of the circuitry in these models are the same as their respective S
series models except for the addition of the BH and U2 boards as
illustrated in Figures 1-3 and 1-4. The circuitry on the BH board captures
the 60HZ frame rate video exiting BU1 board, analyzes the difference
between adjacent fields and generates additional fields in between to
double the frame rate to 120HZ. The end result is a dramatic reduction of
the smearing or “comet tailing” that is inherent to LCD displays during fast
moving video content.
The front video input U2 board provides an additional HDMI input not
found on the S series models. One analog component input was removed
to accommodate the additional HDMI so only HDMI and composite video
are accepted at these inputs.
Power Supply
A G3 board is used and uses a Power Factor Control circuit to generate
the 390VDC required by the D1 and D2 circuits. The on-board protect
circuits are slightly more sophisticated than the G1D and G1H boards but
the end result is to stop the power supply if certain over voltage and current
conditions arise. These items will be discussed later in this chapter.
CTV-41 6
Chapter 1 - Features and Circuit Descriptions
LCD PANEL
(WXGA)
AC IN
OPTICAL OUT
BACKLIGHT POWER
46" ONLY
D2
BACKLIGHT POWER
40
/46"
D1
POWER SU PPLY
G3
VIDEO 1
COMPOSITE
_Y/C IN
VIDEO 3
COMPOSITE IN
L
R
HDMI 1 IN
HDMI 2 IN
PC IN
VIDEO PROCESS
A/V SWITCH ING
MAIN TV MICRO
AUD IO PR OCESS
/AMP
HDMI MICRO
TUNER
ATI MICRO
IC4500
TRID ENT
VIDEO PROCESSOR
IC7300
ATI
IC2009
AUD IO AMP
BU1
USB FOR DMEX
AND SOFTWARE
UPGRADE
FRONT
INPUTS
U1
VIDEO 2
COMPOSITE IN
COMPONENT 2 IN
ATSC/NTSC
TUNER
COMPONENT 1 IN
COMPONENT 3 IN
IC3001
MAIN TV
MICRO
IC2002
AUD IO SW
AUD IO DSP
L/R AUDIO OUT
HEADPHONES OUT
WXGA 60FPS
CTV-41 7
FIGURE 1-2
40/46” S SERIES OVERALL BLOCK DIAGRAM
Chapter 1 - Features and Circuit Descriptions
LCD PANEL
(WXGA)
INVERTER
AC IN
VIDEO 1
COMPOSITE
_Y/C IN
VIDEO 3
COMPOSITE IN
L
R
OPTICAL OUT
HDMI 1 IN
HDMI 3 IN
PC IN
VIDEO 2
COMPOSITE IN
VIDEO PROCESS
A/V SWITCH ING
MAIN TV MICRO
AUD IO PR OCESS
/AMP
HDMI MICRO
TUNER
ATI MICRO
ATSC/NTSC
TUNER
IC4500
TRID ENT
VIDEO PROCESSOR
IC7300
ATI
IC2009
AUD IO AMP
BU1
POWER SU PPLY
G1H
HFR
(High Frame
Rate
)
BH
FRONT
INPUTS
U2
HDMI 2 IN
USB FOR DMEX
AND SOFTWARE
UPGRADE
COMPONENT 1 IN
COMPONENT 2 IN
IC3001
MAIN TV
MICRO
L/R AUDIO OUT
HEADPHONES OUT
IC2002
AUD IO SW
AUD IO DSP
CTV-41 8
FIGURE 1-3
32XBR4 OVERALL BLOCK DIAGRAM
Chapter 1 - Features and Circuit Descriptions
LCD PANEL
(WXGA)
AC IN
OPTICAL OUT
POWER SU PPLY
G3
VIDEO 1
COMPOSITE
_Y/C IN
VIDEO 3
COMPOSITE IN
L
R
HDMI 1 IN
HDMI 3 IN
PC IN
VIDEO PROCESS
A/V SWITCH ING
MAIN TV MICRO
AUD IO PR OCESS
/AMP
HDMI MICRO
TUNER
ATI MICRO
IC4500
TRID ENT
VIDEO PROCESSOR
IC7300
ATI
IC2009
AUD IO AMP
BU1
USB FOR DMEX
AND SOFTWARE
UPGRADE
ATSC/NTSC
TUNER
COMPONENT 1 IN
COMPONENT 3 IN
IC3001
MAIN TV
MICRO
IC2002
AUD IO SW
AUD IO DSP
L/R AUDIO OUT
HEADPHONES OUT
HFR
BH
FRONT
INPUTS
U2
BACKLIGHT POWER
D1
CTV-41 9
FIGURE 1-4
40D3000 OVERALL BLOCK DIAGRAM
Chapter 1 - Features and Circuit Descriptions
Video Processing
An overall block diagram of the video process circuits is illustrated in Figure
1-5 for the S series models and in Figure 1-6 for the 32”XBR 40” D3000
models. Processing of the video is the same except for the additional
HDMI input available via the U2 board and frame doubling on the BH
board.
New Trident Processor
IC4500 has been designed to handle many of the tasks once done by
separate components. It has eliminated a separate CCP processor, HDMI
Micro, DRC and Wega Engine. It is capable of handling video resolutions
from 480i all the way up to 1080p (via the HDMI inputs only). All signals
exit Trident as 720p 60FPS.
Video Switching
Only composite and Y/C signals are switched by IC4800. Component,
HDMI, and PC inputs are routed directly to Trident IC4500 where they are
selected internally. Only video input 1 accepts a Y/C signal source.
Display Information Data (EDID) to provide display capability information
to the device connected to the input. In the XBR model an additional EDID
IC250 (not shown) is located on the U2 board.
Digital Tuner
If a digital tuner source is selected, the signal is sent directly to the ATI
Micro IC7300 where the signal will be demodulated and decoded to
extract the audio and video information. The video digital stream is then
sent to Trident video processor IC4500 and audio data is input to Audio
DSP IC2002 (not shown).
HDMI Inputs
Note the lack of an HDMI Microprocessor. This is now integrated within
the Trident processor IC4500. HDMI sources pass through HDMI EQ
IC550 for impedance matching and into IC4500 for processing of the
audio and video information. IC5501 and IC5502 contain the Enhanced
CTV-41 10
IC4500
TRIDENT VIDEO
PROCESSOR
IC7300
ATI MICRO
ATSC/NTSC
TUNER
IC4800
VIDEO
SWITCH
Y/C_COMPOSITE 1
COMPOSITE
3
BU1
COMPOSITE 2
COMPONENT
2
U1
COMPONENT 1
COMPONENT
3
HDMI 1
HDMI
2
PC
IC5501
EDID
IC5503
EDID
IC5500
HDMI EQ
TO LCD PANEL
DMEX USB
WXGA 60FPS
Chapter 1 - Features and Circuit Descriptions
CTV-41 11
FIGURE 1-5
S SERIES VIDEO PROCESS BLOCK DIAGRAM
IC4500
TRIDENT VIDEO
PROCESSOR
IC7300
ATI MICRO
ATSC/NTSC
TUNER
IC4800
VIDEO
SWITCH
Y/C_COMPOSITE 1
COMPOSITE
3
BU1
COMPONENT 1
COMPONENT
3
HDMI 1
HDMI
3
PC
IC5501
EDID
IC5503
EDID
IC5500
HDMI EQ
TO LCD
PANEL
DMEX USB
WXGA 60FPS
HFR
BH
WXGA
120FPS
U1
IC250
EDID
Chapter 1 - Features and Circuit Descriptions
CTV-41 12
XBR AND D SERIES VIDEO PROCESS BLOCK DIAGRAM
FIGURE 1-6
Chapter 1 - Features and Circuit Descriptions
Audio Processing
Figure 1-7 illustrates the overall block diagram for the audio processing.
All of this is accomplished on the BU1 board.
Analog Audio
All analog audio sources are switched by the Audio DSP IC2002. The L/R
audio signals are A/D converted within IC2002 for processing by DSP
and exit as analog L/R to IC2009. The analog L/R audio is converted
to PWM by IC2009 and amplified by the class-D amplifier within the IC.
All selected analog sources are output in SPDIF format for the optical
out transmitter. Analog L/R outputs are also provided for the audio output
jacks on the rear of the unit and the headphone jack on the front input U1
board. On the 32” XBR series the front input board is the U2 board.
Digital Audio
Digital audio sources are available via the HDMI inputs or digital channels
received by the tuner. HDMI audio is extracted by Trident IC4500 and sent
to the ATI Micro. Digital audio from the tuner is sent directly to ATI. The
audio information is then sent to Audio DSP IC2002 in digital format. At
this point audio process is the same as analog signals.
Optical Out
If an ATSC compliant digital channel is received by cable TV (QAM) or
terrestrial (8VSB) and a Digital Dolby® audio signal is embedded in the
content, the optical out will pass this signal for use with a surround-sound
amplifier that is compatible with Digital Dolby® 5.1 standards. Table 3-1
offers an overall view of what is output from the optical jack based on input
selection.
AUDIO SOURCE OPTICAL OUTPUT
DIGITAL TUNER 5.1 5.1 OR 2CH PCM
DVD HDMI 5.1 2CH PCM
The optical output jack at the rear of the unit will pass all selected audio
sources except for Super Audio CD (SACD) or DVD audio sources
hooked up to the HDMI inputs (for obvious copyright protection reasons).
All analog sources (including that from the NTSC tuner) are output as
2-channel 48KHZ PCM. DVD players hooked up to the HDMI inputs will
output 2-channel PCM regardless of what the HDMI audio output on
the DVD player is set to. The internal speakers will output DVD audio
regardless of what the HDMI audio of the DVD player is set to (unlike
previous year’s models).
ALL ANALOG AUDIO INPUTS 2CH PCM
NTSC TUNER 2CH PCM
SACD VIA HDMI NO OUTPUT
DVD AUDIO VIA HDMI NO OUTPUT
TABLE 3-1
OPTICAL OUTPUT TRUTH TABLE
CTV-41 13
ATSC/NTSC
TUNER
IC7300
ATI MICRO
Y/C_COMPOSITE 1
COMPOSITE
3
COMPOSITE
2
COMPONENT
2
COMPONENT 1
COMPONENT
3
HDMI
1
PC
IC2002
AUDIO SW
DSP
L
R
IC2009
CLASS D
AUDIO AMP
HDMI 2
HDMI 1 ANALOG
IC4500
TRIDENT
OPTICAL OUT
HEADPHONES OUT
U1
BU1
L/R AUDIO OUT
Chapter 1 - Features and Circuit Descriptions
FIGURE 1-7
AUDIO PROCESS BLOCK DIAGRAM
CTV-41 14
Chapter 1 - Features and Circuit Descriptions
Protection
Several circuits on the WAX3 chassis are utilized to monitor voltage and
current conditions. Should a problem develop in any of these monitored
circuits the unit will shut down in most cases and blink the power LED red
in varying sets of sequences in order indicate what is likely causing the
failure. Protect circuits are located on the power supply, BU1 board and
the back light inverters.
Power Supply and Protection
3 different power supplies are used in the WAX3 chassis and these are
shown in Figures 1-8, 1-9, and 1-10. The 26” units use a G1D board, the
32” a G1H board and the 40/46” models use the G3 board. The G1D and
G1H boards are very similar in design with current capacity being their
primary difference and the presence of a PFC circuit on the G1H while
one is not used on the G1D. They both generate 24VDC to supply the
inverter circuits on the panel.
The G3 board uses the PFC circuit to directly drive the D1 and D2 inverter
boards for the 40 and 46” panels. All 3 power supplies contain overvoltage, under-voltage and over-current monitoring. The D3 power supply
contains additiona circuits to monitor the temperature of the PFC switching
transistors and the in-rush current limit resistor R6009 as shown in figure
1-10. If either of these circuits is activated the power supply will be turned
off. The Main Micro located on the BU1 board monitors the regulated 12
volt line generated by all 3 boards. If this voltage is no longer generated
the Main Micro will flash the power LED in sequences of 2 assuming the
standby power supply is still operating.
would be no diagnostics indication from the power LED.
In figure 1-9, note the PFC detection line consisting of PH6301 and Q6403
which is unique to the 40/46” models. If the PFC circuit were to cease
operating the DC voltage, which is normally around 390 volts, would drop
to less than half (rectified AC only). This would put a strain on the D1 and
D2 boards since they would attempt to keep the lamps lit but would require
extra current due to the drastic voltage drop. In this event Q6403 will pull
the control signal (which is normally high) low, turning off the inverter(s).
The symptom would be a unit that has no backlights operating but there
CTV-41 15
STBY
3.3V
STBY
12
V
IC305
AC
IN
AC
IN
Q302
Q902
Q901
STANDBY
POWER
SUPPLY
STBY
3.3V
STBY
12
V
PRIMARY
POWER
SUPPLY
AU
13
V
12V
6V
NTC
1
RY6101
PFC
Q304
SCR
LATCH
12V
OVP
340VDC
CN
3
TO CN 4001
BU1
BOARD
24V
POWER_ON
11
AU 13V
8
6V
4
AU GND
7
STBY 3.3V
13
REG 12V
3
24V
9
CN2
TO CN 4002
BU1
BOARD
TO
INVERTER
BD1
24V
OVP
G1D
Q303
F1
4A
T
Chapter 1 - Features and Circuit Descriptions
FIGURE 1-8
G1D BOARD PROTECTION (26” MODELS)
CTV-41 16
STBY
3.3V
STBY
12V
PH6103
AC
IN
AC
IN
PFC
Q6201
Q6108
Q6107
IC6103
PFC
OVP
Q6105
Q6106
LATCH
STANDBY
POWER
SUPPLY
STBY
3.3V
STBY
12
V
PRIMARY
POWER
SUPPLY
AU
13
V
12V
6V
PFC OCP
R6101
RY6101
PFC
Q6202
Q6203
LATCH
12V
OVP
343VDC
CN6201
TO CN 4001
BU1
BOARD
PH6300
24V
POWER_ON
11
AU 13V
8
6V
4
AU GND
7
STBY 3.3V
13
REG 12V
3
24V
9
CN6202
TO CN 4002
BU1
BOARD
TO
INVERTER
D6101
F6102
4A
24V
OVP
G1H
ON = 3.3V
Chapter 1 - Features and Circuit Descriptions
CTV-41 17
G1H BOARD PROTECTION (32” MODELS)
FIGURE 1-9
INV_ERR
4
REG 12V
6
BACK_LIGHT
3
INV_ERR
9
BACKLIGHT_ON
10
STBY
3.3V
STBY
12
V
PH6300
AC
IN
AC
IN
PFC
Q6407
Q6304
Q6303
1C6300
PFC
OVP
Q6300
Q6301
LATCH
STANDBY
POWER
SUPPLY
STBY
3.3V
STBY
12
V
PRIMARY
POWER
SUPPLY
AU
13
V
12V
6V
PFC OCP
PFC OTP
R6009 OTP
R6009
RY6000
PFC
PH6301
Q6403
PFC DET
PFC OUT
1
PRI GND
3
PFC OUT
1
PRI GND
3
390VDC
POWER_ON
10
AU 13V
7
6V
3
AU GND
5
STBY 3.3V
12
CN6202
CN6203
CN6004
CN6502
CN6501
TO D1
BOARD
TO D2
BOARD
TO D1
BOARD
FROM BU1
BOARD
TO BU1
BOARD
D6000
F6000
6.3A
G3
BALANCE_ERR
7
BALANCE_ERR
7
12V OVP
Chapter 1 - Features and Circuit Descriptions
CTV-41 18
G3 BOARD PROTECTION (40” AND 46” MODELS)
FIGURE 1-10
Chapter 1 - Features and Circuit Descriptions
BU1 Board Protection
The BU1 board has several protect monitoring circuits for its own DC
voltage regulators. Monitoring of temperature, speaker protection and an
inverter failure are also included. A block diagram of these protect circuits
is illustrated in Figure 1-11
Onboard Regulator Protect
The regulated 2.5 volts for Trident IC4500 is monitored. If this voltage fails
A DC_ALERT 1 high will occur on pin 163 of the Main Micro IC3001. The
unit will shut down and the power LED will flash in groups of 3.
Similarly, if the D1.0V or D1.8V sources (generated on the BU1 board)
fails a high will be placed on pin 153 and the unit will shut down generating
groups of 4 blinks.
The regulated 12V is the only outside voltage monitored. It sources from
the power supply and will keep a specified high on pin 82 of the Main
Micro. If the voltage fails or falls below this specified limit, the unit will shut
down and blink the power LED in groups of 2. Note that this 12V line is
also the source for the Panel 12V which is switched by the main micro.
This voltage is also monitored by Main Micro at pin 154 (DC_ALERT_3).
If the 12V from the power supply is OK but failed on the Panel_12V line,
the unit will shut down and blink the power LED in groups of 5.
Thermal Protect
running hot. Shutdowns after extended periods would warrant checking
the location of the unit for proper ventilation.
Panel Protect
If the high voltage generated by the inverter were to fail, or if abnormal
current conditions are detected on the balancer circuits, a high would be
applied on pin 81 of the Main Micro. The unit will shut down and blink the
power LED in groups of 6.
Audio Protect
If any DC is detected on the left or right speaker channels the unit will shut
down and blink the power LED in groups of 8. This symptom is usually
caused by a failed audio amp and would require the replacement of the
BU1 board.
Balancer Protect
Along with a Panel Protect line, a Balancer Error line is connected to pin
81 of the Main Micro. Working in conjunction with panel protection, both
lines connect to a voltage divider. The voltage at pin 81 is normally 3.3
volts. If an inverter error is detected, the line (normally low) will go high
and the inverter transistor will pull the voltage down to zero. A balancer
error would complete the divider network and pull the voltage down to
about one-half (1.8 volts). This is how IC3001 is able to tell which type of
error has occured.
IC3007 is a digital thermometer that can be programmed to send data to the
Main Micro when a specified temperature level is reached. The purpose of
the thermal sensing is to monitor the unit for excessive temperature within
the unit during operation. If the temperature rises above the specified
threshold the unit will shut down and display groups of 6 blinks from the
power LED.
Note: IC3007 is constantly polled by the Main Micro. If the IC were to
fail or the data line on the I²C to open the unit would shut down within
approximately 10 seconds. It is important to beware of this. If a unit shuts
down immediately, it can be safely assumed that the television is not
NOTE: The 26” and 32” models do not have a balancer error line from the
inverter board. Only the 40” and 46” models have this feature.
CTV-41 19
Communications Errors
Another feature of the WAX 3 chassis is the monitoring of communications
between specific devices. Not shown on the previous block diagrams are
the following protect events that could occur.
Main Micro Communication Error
The unit will shut down and the power LED will blink in groups of 10. The
BU1 board must be replaced to rectify this.
Trident Video Process Failure
The unit will shut down and the power LED will blink in groups of 11 The
BU1 board must be replaced to rectify this.
BH Board Communication Error
Unique to the KDL32XBR4 and KDL40D3000 that utilize frame rate
doubling, the communication between the BH board and the LCD panel
TCON is monitored and the unit will shut down if this communication fails.
The power LED will blink in groups of 12.
Chapter 1 - Features and Circuit Descriptions
BU1 to Panel (S series models) or BU1 to BH (XBR4 and D3000 series) Communication Error
If either of these events occurs, the power LED will blink at one-half second
intervals continuously. The unit will not shut down. The backlights will be
lit but there will be no video display (including OSD graphics). This can be
caused by an unplugged LVDS cable or a failure of BU1 or BH board or a
defective panel (TCON failure).
CTV-41 20
Chapter 1 - Features and Circuit Descriptions
AU 13V
5
STBY 3.3V
1
POWER_ON
3
AU GND
REG 12V
7
1
CN4001
CN4002
PANEL 12V DETECT
INV_ERR
5
DIMMER
1
BACKLIGHT
3
BALANCER_ERR
7
DC ALERT 1
(3X)
Q4014
Q4015
INVERTER ER ROR (6X)
CN4003
Q4017 Q4016
Q4001 Q4002
Q4018 Q4019
TRIDENT
DDR 2.5V
DC ALERT 3
(5X)
D1.0V
D1.8V
DC ALERT 2
(4X)
IC3007
TEMP
SENSE
SCL
SDA
163
153
154
81
26
Q2012
Q2017
DC
_DET R
Q2013
Q2018
DC
_DET L
SPEAKER PROT
8X
118
119
IC3001
MAIN MIC RO
BU1
FROM
CN
3 (G1D)
CN6201
(G1H)
CN6202
(G3)
FROM
CN
2 (G1d)
CN6202 (G1H)
CN6203
(G3)
FROM INVERTER
(26/32") OR G3
BOARD
(40/46")
3.3V
POWER_3
PANEL
12V TO
LCD
PANEL
BALANCER ERROR (13X)
MAIN POWER FAILURE (2x)
82
TEMP
ERR OR
(7X)
CTV-41 21
BU1 BOARD PROTECTION
FIGURE 1-11
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