Sony FD Trinitron WEGA KV-32FV16 Installation guide

S®
Training Manual
Circuit Description and Troubleshooting
Course: CTV-28
Direct View Television
AA2U Chassis
Models: KV-32FV16 KV-36FS16
KV-32FV26 KV-36FV16
KV-36FS12 KV-36FV26

Introduction 1
Overview 1
CTV-28 Objectives 1
Features 2
Audio Features 2
Video Features 2
Convenience Features 2
Input/Output 2
Feature Glossary 3
Board Descriptions 4
Overall Block 5
G Board 5
A/V Switching 5
Audio 5
Video 5
Deflection 7
Reset and NVM Operation 9
Reset 9
NVM Operation 9
Service Mode 11
Service Mode Display 11
Adjustment Items 11
Table of Contents
Other Service Mode Displays 13
Tuner Control 15
Tuning to a new Channel 15
Auto Programming 15
Auto SAP (Secondary Audio Program) 15
Video Path Block 17
Video Switching and Comb Filter 19
Video Switching 19
Comb Filter 19
PIP 25
Inputs 25
IC3308 YUV Switch 25
IC3303 PIP 25
Video Processing 27
Main Picture 27
CRT Drive 29
IK Pulses and Video Blanking 29
Tube Bias 29
Troubleshooting 29
Self-Diagnostics 31
AKB Failure 31
Vertical or Horizontal Failure 31

I2C Problems 33
Power Supply Block 35
Troubleshooting 35
Standby Power Supply 37
Converter Operation 37
Regulation 37
Over Current Protection (OCP) 39
Over Voltage Protection (OVP) 39
Secondary Output 39
Checking Q621 39
Power On/Degaussing 41
Power On 41
Degaussing 41
Converter 43
Initial Start Up 43
Soft Start 43
Regulation 43
Troubleshooting 45
Soft Start/Regulation/Foldback 47
Soft Start 47
Regulation 47
Foldback 47
Secondary Voltages 49
+135 Volts 49
+12 Volts 49
+9 Volts 49
Audio B+ 49
Power Supply Protection 55
Latch 55
+135 Over Current Protection 55
Foldback 55
Appendix
Vertical Deflection i
Horizontal Deflection Block iii
Horizontal Out v
Pincushion vii

1
Introduction
Overview
This course will cover the new Sony AA2U chassis. These sets are 32”and
36” only. This chassis is very similar to the AA2W chassis that was re-
leased last year. CTV-26 was a half-day course that covered portions of
that chassis. Consequently, this book will only cover new circuitry and
circuitry not covered in CTV-26.
A copy of the CTV-26 deflection circuits will be included in the Appendix.
Refer to it for information and troubleshooting techniques for the horizon-
tal and vertical sections of the AA2W and AA2U chassis.
There were a few improvements made to the AA2U chassis from the
AA2W chassis. They are as follows:
•A 16-bit processor is used to enhance the OSD. This year’s menu is
much more colorful and easier to use.
•A change has been made in the way the NVM is powered and used.
•A new PIP processor is used that eliminates the need for a chroma
decoder in the PIP path.
•A new 3D Comb Filter is used which contains a built-in A\D Converter.
No external A\D Converter is needed.
•The tuner has been changed from the BTF-WA411 to the BTF-WA412.
•Self-Diagnostics has been added.
CTV-28 Objectives
•Cover the features of the AA2U chassis so the students know what
they are.
•Show how the NVM is powered and used. Talk about the service
mode and what the various sections of adjustments do, what adjust-
ments should be performed and what adjustments should always con-
tain the same data.
•Show the video paths so the students know what they are and how
they can be troubleshot.
•Discuss Self-Diagnostics and how they can aid in quickly diagnosing
a broken set.
•Show pictures that highlight easy-to-get-to test points.
Service Manuals
As we move into the information age, Sony will no longer be producing
paper service manuals. Beginning January 2001 all service manuals will
be delivered via CD-ROM. As an interim step, the service manual for the
32-inch AA2U models (KV-32FV16 and KV-32FV26) comes with a CD-
ROM. The block diagrams, component locations and schematics are
supplied in the paper manual. The rest of the manual, including the ad-
justment section and parts list, is contained on the CD. Keep this in mind
when you need to perform a service call on these models. You may need
to bring a PC with you or print portions of the manual that you think you
may need.

2
Features
Overview
The following section discusses the various features of the AA2U models.
These features will be separated into four categories: Audio, Video, Con-
venience and Input/Output. The following models use the AA2U chassis:
AA2U chassis:
KV-32FV16 KV-36FS16
KV-32FV26 KV-36FV16
KV-36FS12 KV-36FV26
Audio Features
•All models contain the Auto Mute function. Auto Mute mutes the
audio when no signal is received. This prevents the loud static noise
from being heard when no station is received. The display will also
indicate No Signal in the lower left-hand corner. This is important to
remember because if the tuner has a poor reception problem the cus-
tomer may complain of no audio.
•All models are Stereo with Auto SAP.
•All “FV” models contain the Steady Sound Auto Volume, SRS 3D,
Dynamic Acoustic Chamber (DAC) Speaker System and 15Wx2
of audio power.
•The “FV26” models contain the Wireless IR Headphone feature.
•The “FS” models contain Matrix Surround and output 5Wx2 audio
power.
Video Features
All models contain the following video features:
FD Trinitron WEGA TV Velocity Modulation w/ control
Dynamic Focus Color Temperature Adjustment
Vertical Aperture
Compensation
Magnetic Quadra-pole
•All “FV” models use a 3D Digital Comb Filter.
•All “FS” models use a 3-line Digital Comb Filter.
•All “FV” models contain the Enhanced 16:9 Mode. The “FV26” con-
tain an Auto 16:9 Enhancement. This means these models have the
choice of Auto, ON or OFF, while the “FV16” models have the choice
of ON and OFF.
Convenience Features
All the AA2U models contain the following Convenience features:
Speed Surf Tuning Clock Timer (2 events)
Advanced On-screen Menu Sleep Timer (15/30/45/60/90)
Channel Label V Chip Parental Control
Video Label XDS/Closed Captioning
Multi Language Display Auto Channel Programming
Jump Channel Preset Program Palette
Favorite Channel or
Favorite Preview
Customer Tilt Control
•All models have 2 Tuner PIP except the KV-36FS12. The 2 Tuner
PIP has the Freeze Memo feature.
Input/Output
FS12 FS16 FV16 FV26
S Video Front/Rear 0/1 0/1 1/1 1/1
Composite Front/Rear 1/2 1/2 1/2 1/2
Component (Y/Pb/Pr) 1111
Fix/Var. Out Yes Yes Yes Yes
RF Inputs 1222
Monitor Output No No Yes Yes
S Link Control No No Yes Yes

3
Feature Glossary
Audio Features
Auto Mute –Mutes the audio output when the tuner receives no signal.
This keeps the loud volume from occurring due to static.
Auto SAP –If activated, Auto SAP automatically switches to the SAP
audio if it is present.
Steady Sound Auto Volume – Regulates the volume of the audio so
there are no sudden fluctuations.
SRS 3D –A digital signal-processing algorithm that simulates surround
sound using only two speakers.
Dynamic Acoustic Chamber (DAC) –A speaker enclosure that uses
the cabinet to improve sound quality.
Wireless IR Headphones – Wireless headphones are included with
“FV26”models.
Video Features
Dynamic Focus –Automatically adjusts the focus to improve focus on
certain parts of the screen.
Magnetic Quadra-pole –Controls the electron beam magnetically to
enhance picture resolution.
Trinitone Color Temperature Adjustment –Enables the user to adjust
the color temperature to warmer (redder) or cooler (bluer) in order to match
the program.
Enhanced 16:9 Mode - This mode uses vertical compression to enhance
“anamorphic”widescreen video from DVDs. The Auto Mode reads data
in the vertical blanking area to sense if the picture is 16:9. If it is, the set
will automatically switch to the vertical compression mode.
Velocity Modulation Scanning w/control - Sharpens the picture defini-
tion by varying the beam scanning rate to give every object a sharp, clean
edge. There are settings for High, Low and OFF.
Vertical Aperture Compensation - Sharpens picture definition and edge
detail on the vertical plane.
Y/Pb/Pr - Delivers optimum picture quality by supplying separate connec-
tions for luminance (Y), blue color difference (P B) and red color differ-
ence (P R ). Ideal for DVD players and Digital Television (DTV) set top
receiver/decoders.
3-line Comb Filter – Looks at the line above and below the line being
processed to separate the chroma and luminance in a composite video
signal. This reduces dot crawl to produce a better picture.
3D Comb Filter –Looks at the line above and below the line being pro-
cessed, along with the same three lines in the frame before and after to
optimally remove the chroma component from the Y in a composite video
signal. This reduces dot crawl and other noise to produce the best picture
possible.
Convenience Features
XDS (Extended Data Service) - Receives new information services that
some broadcasters are adding to their signals, including time, station call
letters, and programming information (where available).
Advanced On Screen Menu –A new, colorful on screen menu that is
more intuitive and easier to use.
Preset Program Palette –Picture types that are preset. These include
Vivid, Standard, Sports and Movie.
Freeze Memo –Allows you to save an item on the screen in the PIP
window while the main picture continues in real time.
V-Chip Parental Control - Allows parental control over rated television
programs.
Speed Surf Tuning - “Rapid Fire”channel change. Allows the viewer to
quickly scroll through channels.
Favorite Channel - Gives you fast one-button access for up to eight fa-
vorite channels.
Favorite Preview - In 2-tuner PIP Models, viewers can preview program-
ming on up to eight favorite channels in the PIP box while current channel
programming remains in the main picture.

4
A Board
C Board
WA Board
UY Board
AK Board
G Board
HX Board
HS Board
FS12 & FS16
A Board
C Board
WA Board
UX Board
AK Board
T Board
(FV26 ONLY)
G Board
HX Board
HB
Board
HA
Board
FV16 & FV26
Board Descriptions
Name
Description
ATuning Micon, Y/C Jungle, Tuner, Pincushion, H Deflection, V Deflection, H Deflection
AK Audio Amp, Surround Sound, Sub tuner, S-Link
CCRT Drive
GPower supply
HA Front A/V Inputs, Menu Buttons
HB IR detector
HS (FS12 and FS16 only) Front A/V Inputs, Menu Buttons, IR Detector
HX Buttons
T(FV26 Only) IR Headphones
UX(FV Only) 3D Comb Filter, A/V Switch, Audio Control, SRS, PIP Encode
UY(FS Only) 3 Line Comb Filter, A/V Switch, Audio Control, SRS 3D, PIP Encode (except FS12 model)
WA Velocity Modulation, Quadrapole

5
G BOARD
MAIN
P.S.
DGC DGC
POWER ON
AUDIO B+
9V
12V
135V
STANDBY
SUPPLY
POWER SUPPLY BLOCK
STANDBY
5V
Overall Block
G Board
The G board contains all of the power supplies, and the degaussing cir-
cuit. AC comes into the G board through the power cord to the previously
mentioned circuits.
The standby power supply creates the Standby 5 volts needed to power
the Tuning Micon, remote sensor and key inputs.
The Main Power Supply is turned ON by the Power On line. This signal
comes from the Tuning Micon to turn the set ON. The Main Power Supply
creates Audio B+, 9V, 12V and 135V.
The Tuning Micon turns ON the degaussing circuit immediately after the
set is powered up. The degaussing circuit feeds the AC line current to a
degaussing coil, which removes any magnetic fields that may have devel-
oped in the picture tube. It operates for about 3-4 seconds each time the
set is turned ON.
A/V Switching
The Video 1, 3 and 4 audio and video inputs are on the UX board. The
Video 2 A/V inputs are located on the HB Board. The signals are routed
to the UX board through the A board. The A/V input from the Main Tuner
on the A board and the A/V input from the Sub Tuner on the AK board are
also sent to the UX board. The UX board contains the A/V Switch. This
IC switches the appropriate audio and video signals to the audio and video
circuits.
Audio
The audio signal is routed from the UX board to the AK and T boards.
The AK board contains any audio processing, such as SRS or matrix
surround sound, and the audio amp. The audio amp drives the speakers.
The AK board also outputs signals for the Monitor Out and the Var./Fix
output.
The audio on the T board is modulated and amplified by the IR Amp. The
IR Amp outputs to an LED array for use with the external IR headphones.
Video
The composite and S video inputs are routed through the 3D Comb Filter.
The C output from the Comb Filter becomes Main C while the Y is sent
back to the A/V Switch and also sent to the ID 1 Decoder. An ID 1 De-
coder extracts data about the aspect ratio of a signal from the vertical
blanking area. The Y signal that is output from the A/V Switch becomes
Main Y.
The Main Y and C signals are output to the A board and then to the YCJ.
These signals are decoded to Y, R-Y and B-Y and are output to the YUV
SW. This IC is used to select either the Component video from the YCJ
or the component video from the Video 4 input. The Main Y signal is also
input to the Tuning Micon for V Chip decoding.
The selected signals are input to another YUV SW. This YUV switch
outputs either the main video signal or the main video signal mixed with
the PIP signal. These outputs are input to the E inputs of the YCJ. This
video is processed and output as RGB from the YCJ. The RGB signals
are sent to the C board where they are input to the CRT Drive. The CRT
Drive amplifies and inverts the signals and applies them to the picture
tube’s cathodes.

6
OVERALL BLOCK 11/8/00
MONITOR
OUT
VAR/FIX OUT
SUB
TUNER
AK BOARD
MAIN
TUNER
A BOARD
V4
COMPONENT
INPUT PIP
TUNING
MICON
ID 1
DECODER
3D
COMB
FILTER
YCJ
VIDEO
AMP
H
DEFLECTION
PIN FBT
QUADRA-
POLE
AUDIO
AMP
AUDIO
PROCESS LED ARRAY
YUV
SW
YUV
SW
IR
AMP
A/V SWITCH
RGB
IK
TO
QUADRAPOLE
OSD
MAIN C
VITM
MAIN
AUDIO
E
YUV
200V H
OUT
E/W
HV
SUB V
+12V
-15V
V
A
YUV
Y
VD
HP
HD
T BD.
A
A
V
A
A
V
L
R
HP
AK BD.
WA BD.
UX BD.
A BD.
C BD. YOKE
CRT
1CTV28 1274
C
Y/CV
MAIN Y
YUV YUV
FV26
ONLY
VP
SDA SCL
*V2 INPUT LOCATED ON FRONT PANEL
HB BOARD
**FV26
ONLY
VP
PROT
V
DEFLECTION
V1-V3*
COMPOSITE
OR S VIDEO

7
Deflection
Horizontal
When the set is turned ON and +9 volts is received by the YCJ, the YCJ
will output horizontal drive pulses. These pulses are amplified and output
to the horizontal yoke and FBT. The horizontal yoke uses the horizontal
output to control the beam scan across the face of the tube.
The FBT is used to create several voltages. They are High Voltage, 200
Volts, +12 and –15 volts, and ABL. The High Voltage, necessary for
beam acceleration, is connected to the second anode of the picture tube.
The 200 volts is used to power the video amp located on the C board.
The +12 and –15 volt lines are created to power the Vertical Deflection IC.
If these signals are missing, the set will indicate a vertical problem even
though the problem is actually in the horizontal or FBT section. The ABL
signal is input to the YCJ so that it can adjust the levels of the video signal
to keep the brightness at a consistent level.
The Horizontal Deflection circuit also returns a sample pulse, HP, to the
YCJ to ensure that the phase of the input and output is the same. The HP
signal is also input to the Quadra-pole circuit to create the signal needed
to shape the beam in the corners of the picture tube.
Pincushion
The pincushion correction is controlled by the E/W signal from the YCJ
when the horizontal drive pulses are output. This signal is a 60 Hz pa-
rabola signal that is used to dynamically widen the picture as the beam
scans from top to bottom. This signal also rides on a DC level, which is
used to maintain the overall width of the picture. This DC level is changed
using the HSIZ adjustment in the VP section of the service menu.
Vertical
The vertical drive signals are output from the YCJ when communications
are established between the Tuning Micon and the YCJ. These drive
signals are complementary, 180 degrees out of phase, and are sent to
the Vertical Output circuit.
There are two types of vertical drive signals used. One is for normal 4:3
aspect ratio video and the other is for 16:9 compressed video. The Verti-
cal Deflection circuit outputs the V Out signal to the vertical yoke. This
signal is used to control the up and down beam scan of the tube.
The Vertical deflection circuit also outputs the VP signal. The VP signal is
a sample of the pump-up pulse used to boost the B+ inside of the vertical
output IC. This signal is input to the YCJ for vertical protection and also to
the Quadra-pole circuit to create the necessary output to control the beam
shape at the corners of the tube.
The Vertical Interval Timing (VITM) signal from the YCJ is fed back to the
Tuning Micon to control the timing of the I2C bus. This ensures that I2C
data will only be sent during the vertical-blanking interval. If the VTIM
signal is missing, there will be no OSD and the PIP window will roll verti-
cally.
Quadra-pole Focus
Due to the flat screen in a set that uses a FD Trinitron tube, the focus in
the four corners of the set has changed. While the dots are still in focus at
the four corners, the spot of the beam has changed from round to ellipti-
cal. The Quadra-pole circuit is used to make these beam spots round.
The beam spots are made round again by supplying a signal to four coils
mounted on the yoke. The magnetic fields created by the signals applied
to the coils reshape the beam spots.
The VP and HP signals are samples of the output signals of the vertical
and horizontal deflection circuits. These signals are wave shaped to cre-
ate two differential parabola signals and applied to the four coils. Their
magnetic fields reshape the beam.

8
OVERALL BLOCK 11/8/00
MONITOR
OUT
VAR/FIX OUT
SUB
TUNER
AK BOARD
MAIN
TUNER
A BOARD
V4
COMPONENT
INPUT PIP
TUNING
MICON
ID 1
DECODER
3D
COMB
FILTER
YCJ
VIDEO
AMP
H
DEFLECTION
PIN FBT
QUADRA-
POLE
AUDIO
AMP
AUDIO
PROCESS LED ARRAY
YUV
SW
YUV
SW
IR
AMP
A/V SWITCH
RGB
IK
TO
QUADRAPOLE
OSD
MAIN C
VITM
MAIN
AUDIO
E
YUV
200V H
OUT
E/W
HV
SUB V
+12V
-15V
V
A
YUV
Y
VD
HP
HD
T BD.
A
A
V
A
A
V
L
R
HP
AK BD.
WA BD.
UX BD.
A BD.
C BD. YOKE
CRT
1CTV28 1274
C
Y/CV
MAIN Y
YUV YUV
FV26
ONLY
VP
SDA SCL
*V2 INPUT LOCATED ON FRONT PANEL
HB BOARD
**FV26
ONLY
VP
PROT
V
DEFLECTION
V1-V3*
COMPOSITE
OR S VIDEO

9
Reset and NVM Operation
Overview
This year the reset circuit and NVM circuits have changed slightly. The 5
volts developed on the reset line after reset occurs is used to power the
NVM.
Reset
The set is reset anytime the AC cord is plugged in or power from the AC
cord is switched OFF, then ON. Whenever this occurs Standby 5V is
developed by the Standby Power Supply on the G board and applied to
the Tuning Micon at IC001/16. It is also applied to IC003/5 Reset Input.
IC003 Reset contains a threshold comparator that holds pin 4 LOW until
the Standby 5V line reaches a certain voltage. When this voltage is
reached, IC003/4 becomes an open collector circuit. This allows the
Standby 5V to charge C077 through R035. Since C077 acts as a short
initially, it holds IC001/12 I-Reset LOW for the time it takes to charge
C077. This time is determined by the value of R035 and C077. Since
power is applied to the micro during this time, reset occurs after C077
charges to a sufficient level.
Since the charge across C077 will be 5 volts, the Reset line is now also
used to power the NVM. This is to prevent the corruption of data during
loss of input voltage or low voltage situations. This 5 volts is applied to
IC002 NVM through R039.
NVM Operation
After Reset occurs, the first external operation performed by IC001 Tun-
ing Micon is to read the data from the NVM and place that data into its
corresponding internal registers. This is done to speed operations since
the internal registers (RAM) of IC001 Tuning Micon are much faster than
the registers in IC003 NVM. This is also why we can change data in the
service mode and get back to the original data by pressing 0 (Read) Enter
if we have not written to the NVM by pressing Muting (Write) Enter. The
set will continue to operate from this data until the set is unplugged and
Reset occurs again.
IC002/7 Write Protect is normally held HIGH by IC001/23 O NVMWTN.
When IC001 Tuning Micon wants to write to the NVM IC001/23, O
NVMWTN goes LOW. When the write protect line is LOW, the NVM can
be written to and read from through the I2C bus.
The NVM and Tuning Micon communicate on a separate bus from all
other I2C communications. This bus is called the B bus and is only con-
nected between the NVM, Tuning Micon and CN1103 Check Connector.
This connector is used at the factory to perform various functions involv-
ing the NVM and the Tuning Micon. When outside control of the I2C B bus
occurs, the I-B INTN is held LOW and commands are given from the
outside source.
NVM Jig Use
The procedure for using the NVM Reader/Writer jig is outlined for all mod-
els in General SB 31. For these manuals you need to attach the clip to
the NVM and place the ground clip on IC001/23 O-NVMWTN. No ground-
ing of the Reset line or crystal needs to be done since the Tuning Micon is
not powered. This is because the NVM and Tuning Micon no longer share
a common power line.

10
RESET 11/7/002CTV28
23
25
26
15
24
27
O-XTAL I-XTAL
O-NVMWTN
IO-BCLKN
IO-BDATN
IO SCLKN
IO SDATN
13
C035 C036
IC001
M306V5ME-
XXXSP
TUNING MICON
12
16
I-RESET
5V
IC002
CAT24WC08J
NVM
7
6
5
R053
R072
R074
WP
BCL
BDA
8
VCC
R039
IC003
PST9143
RESET
5
4
2
C077
R035
D005
MTZJ5.6
STANDBY
5V
3
X001
10MHz
H = READ ONLY
SCL
SDA
TO CHECK
CONNECTOR
CN1003
54 I-BINTN
4
AVcc

11
SERVICE MODE DISPLAY
VP
HPOS
09
TV
SERVICE
ADJUSTMENT
SECTION
ITEM
NUMBER
ITEM
DATA MODE
REGISTER
NAME
Service Mode
Overview
There have been several changes to the service mode in the past few
years. There also have been changes to the way the service mode infor-
mation is shown in the service manual. This section will discuss how to
use the service mode and how to use the Adjustment Items section of the
service manual.
Service Mode Display
The method used to enter the service mode has not changed, press “Dis-
play” “5” “Vol +” “Power” on the remote control in quick sequence. The
set will turn ON with the on-screen display shown below.
Let’s examine this service Menu OSD. It is divided into the following
sections:
•Adjustment Section – This indicates what IC is effected by the data
in this register. The different IC types are listed in the service manual.
There are three adjustment sections that do not follow this format.
They are CCD, Palette and ID modes. The differences in these sec-
tions will be discussed later. Use the 2 and 5 buttons on the remote
control to move between adjustment sections.
•Register Name – Located underneath the Adjustment Section, the
register name refers to the specific register that will be effected. Each
register name is used to adjust the parameters of an IC by changing
the Item Data. Use the 1 and 4 buttons on the remote control to move
to the different registers.
•Item Number – Each Adjustment Section contains a different number
for every Register Name. The item number always starts with zero
and continues to increment for each Register Name. The amount of
numbers varies for each section.
•Item Data – This is the number for the data that the named register
contains. Adjusting this number changes the parameter effected by
the register. Use the 3 and 6 buttons on the remote control to change
the Item Data.
•Mode – Located underneath the Item Data, this shows which mode
the set is in. In the case of AA2U, the modes are TV, Video 1, Video
2, Video 3 and Video 4. Use the TV/Video button on the remote con-
trol to change modes.
•Service - This last item is an indication that the unit is in the Service
Mode.
Adjustment Items
The facing page shows an excerpt from the service manual. We will
explain the purpose of this table.
Item Number
The first column in the table refers to the Item Number mentioned previ-
ously.
Register Name
The second refers to the Register Name. Each Register Name is used to
adjust the parameters of an IC by changing the data.
Adjustment Section
The third shows the Adjustment Section. The example shows that the VP
(Video Processor) registers will be effected. It also indicates that these
registers effect the CXA2131AS. This is IC355 YCJ.

12
Register Description Data Adj/Fix Initial Comments
Name Range Data FS FV16 FV26
0 HPOS H-Position 0-63 Adj 7 0: 2 ms delay, 64: 2 ms advance
1 HSIZ H-Size 0-63 Adj 10 EW DC bias, 0: -0.5V, 31: 0V, 63: +0.5V
2 VBOW AFC Bow 0-15 Adj 6 0: top/bottom delay 900ns, 7: center, 15: top/bottom advance 900ns
3 VANG AFC Angle 0-15 Adj 50: top dela
y
/bottom advance 650ns
,
7: center
,
15: top advance/bottom dela
y
650ns
4 TRAP Trapezium Adjustment 0-63 Adj 6 0: 1.5ms advance, 15: 1.5ms delay
5 PAMP Pin Compensation 0-63 Adj 32 0: 0.15Vpp, 31: 0.7Vpp, 63: 1.3Vpp
6 UCPN Upper Corner Pin 0-63 Adj 36 0: -0.4V, 63: +0.4V
7 LCPN Lower Corner Pin 0-63 Adj 36 0: -0.4V, 63: +0.4V
8 VSIZ V-Size 0-63 Adj 0 0: -15%, 31: 0%, 63: +15%
9 VPOS V-Position 0-63 Adj 31 0: -0.1V, 31: 0V, 63: +0.1V
10 VLIN V-Linearity 0-15 Adj 7 0: 85% top enlarged, 7: 100% top normal, 15: 115% top compressed
11 VSCO S-Correction 0-15 Adj 7 0: 0V added to VD, 15: 100mVpp added to VD
12 VZOM 16:9 CRT Zoom Mode On/Off 0, 1 FIX 0 0: Zoom Off, 1: Zoom On (top/bottom cut by 24% when ASPECT=31, RGB blanked in this
interval
)
13 EHT Vertical Size High voltage Correction 0-15 FIX 4 0: Picture adjusted 0%, 15: Picture adjustment -5%
14 ASP Aspect Ration Control 4:3 Mode 0-63 FIX 47 0: 75%(16x9 CRT Full), 31: 100% (4x3 CRT Full), 63: 110%
15 ASP1 Aspect Ration Control 16:9 Mode 0-63 FIX 47 0: 75%(16x9 CRT Full), 31: 100% (4x3 CRT Full), 63: 110%
16 SCRL 16:9 Vertical Scroll During Zoom 0-63 FIX 31 0: Scrolled toward top 32H, 63: Scrolled toward bottom 32H
17 HBSW H Blanking Switch 0, 1 FIX 1 0: OFF, 1: ON
18 LBLK Left Blanking 0-15 FIX 15 0: +1.2ms, 7: Center, 15: -1.2ms
19 RBLK Right Blanking 0-15 FIX 0 0: +1.2ms, 7: Center, 15: -1.2ms
20 HDW H Drive Pulse Width 0, 1 FIX 1 0: Normal Mode (25ms), 1: Narrow Pulse Width
21 EWDC EW/DC Display 4x3 on 16x9 CRT 0, 1 FIX 0 0: OFF, 1: ON
22 LVLN Picture Bottom Lin Adjust 0-15 Adj 0 0: 100%, 15: 85% Picture top compressed
23 UVLN Picture Top Lin Adjust 0-15 Adj 0 0: 100%, 15: 85% Picture bottom compressed
24 RDRV Red Drive 0-63 Adj 31 0: 1.5Vpp, 63: 3.0Vpp Red Signal Output
25 GDRV Green Grive 0-63 Adj 31 0: 1.5Vpp, 63: 3.0Vpp Green Signal Output
26 BDRV Blue Drive 0-63 Adj 31 0: 1.5Vpp, 63: 3.0Vpp Blue Signal Output
27 RCUT Red Cutoff 0-15 FIX 7 0: 3.5mA IK, 7: 13mA IK, 15: 22.7mA IK
28 GCUT Green Cutoff 0-15 Adj 7 0: 3.5mA IK, 7: 13mA IK, 15: 22.7mA IK
29 BCUT Blue Cutoff 0-15 Adj 7 0: 3.5mA IK, 7: 13mA IK, 15: 22.7mA IK
30 RDR4 Video 4 Red Drive 0-63 Adj 31 0: 1.5Vpp, 63: 3.0Vpp Red Signal Output
31 GDR4 Video 4 Green Drive 0-63 Adj 31 0: 1.5Vpp, 63: 3.0Vpp Green Signal Output
32 BDR4 Video 4 Blue Drive 0-63 Adj 31 0: 1.5Vpp, 63: 3.0Vpp Blue Signal Output
33 RCU4 Video 4 Red Cutoff 0-15 FIX 7 0: 3.5mA IK, 7: 13mA IK, 15: 22.7mA IK
34 GCU4 Video 4 Green Cutoff 0-15 Adj 7 0: 3.5mA IK, 7: 13mA IK, 15: 22.7mA IK
35 BCU4 Video 4 Blue Cutoff 0-15 Adj 7 0: 3.5mA IK, 7: 13mA IK, 15: 22.7mA IK
36 SBRT Sub Brightness 0-31 Adj 15 Sub Brightness
37 RON Red Off 0, 1 FIX 1 0: OFF, 1: ON
38 GON Green Off 0, 1 FIX 1 0: OFF, 1: ON
39 BON Blue Off 0, 1 FIX 1 0: OFF, 1: ON
40 AXPL Axis PAL 0, 1 FIX 0 0: Normal Axis, 1: Forced PAL Axis
41 CBPF Chroma BPF On/Off 0, 1 FIX 1 0: BPF OFF, 1: BPF ON
42 COFF Color On/Off 0, 1 FIX 0 0: Chroma OFF, 1: Chroma ON
43 TSSP Sub Sharpness for TV Input 0-15 Fix by model 6 5 0=-12dB, 7=+3.5dB, 15=+9dB
44 TSPF Sharpness fo for TV Input 0, 1 FIX 1 0=2,5MHZ, 1=3.0MHZ
45 VSSP Sub Sharpness for Video Input 0-15 Fix by model 7 6 0=-12dB, 7=+3.5dB, 15=+9dB
46 VSPF Sharpness fo for Video Input 0, 1 FIX 1 0=2,5MHZ, 1=3.0MHZ
47 YSSP Sub Sharpness for YUV Input 0-15 Fix by model 7 6 0=-12dB, 7=+3.5dB, 15=+9dB
1
7
1
7
0
1
0
6
8
1
1
1
36
29
14
14
10
14
10
8
44
0
54
46
37
15
0
1
0
47
31
1
0
9
0
4
47
35
7
39
6
36" Avera
g
e Data
9
15
7
5
8
30
35
5-4. ADJUSTMENT ITEMS
VP
CXA2131AS

13
V CHIP OSD TEST REGISTER
CCD
DUMO
00
TV
SERVICE
SUB VIDEO
V CHIP DATA
MAIN VIDEO
V CHIP DATA
MAIN: 01001000 01001100
SUB: 01001000 01100100
Description
The fourth column is the Description of the adjustment register. Typically
this reflects the Register Name, as in the case of HPOS. It refers to the
Horizontal Position adjustment. The descriptions of some Register Names
are not as evident as HPOS, so it is always important to check the de-
scription before doing and adjustment.
Data Range
The next column is for the Data Range. This shows which numbers are
available for the adjustment. In the case of HPOS, the range is from 0 to
63.
Adj/FIX
The Adj/FIX column refers to whether the data number in a register should
vary from set to set. Adj means that different values could be found in
every set. FIX means that the data should be the same in each set listed
in that service manual. You should note that it is possible to change FIX
settings, but they should not be changed. Registers that have FIX set-
tings are shaded in gray in the Adjustment Items table.
Initial and Average Data
The next two columns, Initial Data and Average Data, are related to each
other. Initial Data is the data that is stored in the NVM at the board level
before the set is assembled and tested at the factory. Average data is the
average value of the data found in a register from production samples at
the factory.
If a register is shaded in gray (FIX, the value in the register should be the
same as average data. There may be some occasions where the value
was changed at a point in production. However if this occurs, the value
should be very close and the difference may be unrecognizable. There-
fore if all data is lost, all FIX data registers should be set to the average
value.
If a register is not shaded in gray (Adj), the value in the register will be
close to the average data value. If all the data is lost, all Adj registers
should be set to the Initial data value and then adjusted according to the
procedure in the service manual. These values should end up close or
the same as the average data value when adjusted. However, this is not
always true since the average value is just that, an average.
Comments
This column gives some more information about the registers parameters.
Sometimes it helps in clarifying what the register does.
Other Service Mode Displays
There are three sections of the Service Mode that act differently from the
standard adjustments. They are the V Chip OSD Test Register, Palette
Adjustments and ID Adjustments. Note: The override password for V
Chip password is 4357 in all Sony televisions.
V Chip OSD Test Register
The drawing below shows the display when in the V Chip OSD Test Reg-
ister section of the display mode. You can get to this section by entering
the service mode and pressing the “2” button to change the Adjustment
Section until you get to CCD.
This is a dummy section of the service mode. This means that these
registers are not active. They will display the V Chip data being received
by the Main V Chip in the Tuning Micon and Sub V Chip in the PIP Pro-
cessor. This data is displayed for Main and Sub V Chip in two 8-bit words.
If there is no V Chip data being sent by the station that is tuned, the data
will show as all zeroes.

14
ID MODE
ID
ID1
163
TV
SERVICE
00111111
M306V5ME - 101SP
Version : 1.0 AA NVM: G
The table below shows the meaning of the bits in the two bytes. Bit 6 in
each byte is set to a 1 when the V Chip system is active. Byte 1 Bit 5 is
the flag for Sexually Suggestive Dialog. Byte 1, Bits 4 and 3 determine
which ratings system will be used. If the data here is 0 and 1, the US TV
Ratings system is in use. If the data is 0 and 0, the MPAA (Movie) Rating
system is in use. Any other data combinations found here are for non-US
systems and will not be discussed. The last three bits of Byte 1 will con-
tain data for the MPAA Movie ratings. This data will be all zeroes if Bits 4
and 3 indicate that TV Ratings are used.
Byte 2 Bit 5 is normally for Violence unless the TV Rating is Y7, then it is
for Fantasy Violence. Byte 2 Bit 4 is for Sexual Situations. Byte 2 Bit 3 is
for Adult Language. The last three bits of Byte 2 are for the TV Ratings.
These bits will be all zeroes if Byte 1 bits 4 and 3 are set for MPAA Movie
Ratings.
Bit 76543210
Byte 1 X1D01M2M1M0
Byte 2 X 1 (F)V S L T2 T1 T0
PALETTE SERVICE MENU
PALETTE
VPIC
063
TV
SERVICE
Sports
Palette Service Menu
The drawing below shows what the OSD looks like when you enter the
Palette portion of the Service Menu. You can get to this mode by entering
the service mode and pressing the “2”button until the word PALETTE
appears in the Adjustment Section. When you get to this section of the
menu, you will see an additional word under SERVICE. This word will be
one of the Program Palette settings. They are Vivid, Standard, Movie and
Sports.
This section of the service menu is to set the Reset levels for each of the
Program Palette selections. This means that when the customer presses
the “Reset”button on the remote in a particular Program Palette mode,
that mode’s settings will return to the factory preset. These factory pre-
sets are set by entering the service mode and using the Program Palette
menu to select the Palette that you want to change. Whichever Palette
you select should be displayed under the word SERVICE when you get to
the Palette Adjustment Section. The factory preset for each Program
Palette setting is listed in the service manual.
ID Menu
The ID Adjustment Section of the Service Menu is used to select the ID
features for each model. There are eight different IDs for each model.
Besides this, there is some other information displayed at this time.
There are three different lines at the bottom of the screen. The first line at
the bottom left shows the type of microprocessor being used. In this
case, the type is M306V5ME-101SP. Under that, the version for the firm-
ware is displayed. In this case the Version is 1.0AA. This is useful if a
service bulletin is issued that requires the version of the firmware to be
checked. The bottom right hand corner of the display shows the state of
the NVM. This should say NVM: G as shown above. This is displayed
when the Tuning Micon checks certain addresses for certain data. This
process confirms that communication is possible between the NVM and
Tuning Micon. If this data were not present, it would read NVM: NG.

15
Tuner Control
Overview
This section will discuss how the Tuning Micon and the tuner work to-
gether to receive broadcast and cable signals.
Tuning to a new Channel
When the channel is changed using the Channel keys or the remote con-
trol, coarse tuning occurs, followed by fine tuning. Three things occur
during coarse tuning:
•IC001 Tuning Micon sends data and clock to TU102 Main Tuner
•IC001/51 O-AGCMT outputs a High
•IC001/50 O-Mute outputs a High
The data is used to inform TU102 Main Tuner what station to tune. The
High from IC001/51 turns Q1103 ON. When Q1103 turns ON, it lowers
the voltage at the RF AGC input of TU102 Main Tuner. This helps the
tuner to de-tune so that when the data is read, the tuner can change to
the new station. IC001/50 outputs a High which is sent to Q005 Buffer
and then to the Mute input of TU102 Main Tuner. The Mute line is used to
mute the audio during channel changes.
During fine tuning four things occur:
•IC001/51 O-AGCMT returns to being Low
•IC001/50 O-Mute returns to being Low
•IC001/40 I-AFT is monitored
•Data is sent to fine tune the station
The AGCMT and Mute lines go High because that is their normal state.
When High, the AGC is active and the audio is not muted. They will stay
in this state until another channel change occurs. IC001/40 I-AFT line is
monitored so that IC001 Tuning Micon knows when the tuner is tuned to
the station. This is done when IC001 sends data to the tuner to fine tune
its internal oscillator for the channel selected. When the oscillator is set
correctly, the voltage input to IC001/40 I-AFT will be between 1.7 and 3.5
volts. When fine-tuning occurs, data is no longer sent from IC001 Tuning
Micon to TU102 Main Tuner. If there is an open in the AFT line, the tuner
will drift above and below the station selected. The result would be a
station tuned that would drift in and out between a good picture and a
snowy picture.
Auto Programming
During the Auto Program function, which is selectable from the Menu, the
set memorizes all channels that have an adequate signal. During this
function, IC001 Tuning Micon sends data to TU102 Main Tuner. This
data causes the tuner to tune each station one at a time. Also during this
time IC001/51 O-AGCMT and IC001 O-Mute will be High, deactivating
the tuner’s AGC circuit and muting the audio.
As IC001 Tuning Micon is instructing the tuner to tune each station, it is
monitoring its I-HSync input for horizontal sync pulses. If there is a de-
cent horizontal sync pulse present for that channel, then its data is stored
in memory and the channel is considered present. This data is stored in
the NVM when the set is turned OFF.
The sync separator works by taking the video signal from the Detect Out
of TU102 Main Tuner and separating the horizontal sync tips and apply-
ing that signal to Q001/B. Q001 inverts these signals and outputs them
from its collector. The signal here will be positive going horizontal sync
pulses. These are applied to IC001/44 I-HSync.
Auto SAP (Secondary Audio Program)
All models that use the AA2U chassis have the Auto SAP feature. This
feature will automatically output the secondary audio if it is present and
Auto SAP is selected in the menu. If there is no secondary audio, the
Main audio will be used.
When Auto SAP is selected, IC001/36 O-SAP outputs a High to the Mode
input of TU102 Main Tuner. Anytime a SAP signal is received by the
tuner, regardless of the Auto SAP setting, the SAP IND line of TU102
Main Tuner outputs a High.

16
TUNER CONTROL 11/3/00
C1109
51
40
44
24
27
I-STREON
46
37
36
50
IC001
TUNING
MICON
M306V5ME-
XXXSP
10
42
60
9V
9V 30V 5V SCL SDA
R028
R057
R052
R049
R033
R020
R001
AUDIO AND VIDEO TO UX BD.
C1108
R1106
STANDBY 5V
Q005
R002
MUTE
30V 5V
R1107
Q1103
R1108
R048
SIRCS FROM HB BD.
KEYFROM HX BD.
STEREO LED TO HB BD.
RF AGC
9V
ANTENNA
RF IN
AFT OUT
ST IND
SAP IND
MODE
DET OUT
R OUT L OUT
Q001
C005
R009
R011
D001
9V
9V
9V
C003
C003
C001
9V R032
R007 D003
R003
DET OUT 2
R1104
C1107 R1105
R046
SCLKN
SDATN
O-AGCMT
I-AFT
I-HSYNC
I-SAPIND
0-SAP
0-MUTE
I-SIRCS
I-KEY N
O-STLED
TU102
TUNER
BTF-WA412
9V
5CTV28 1275
A BD.

17
Video Path Block
Composite Video
Composite video signals are input to A/V Switch where the selected input
is switched out. This output is used for the Monitor Out and is also sent
back into the A/V Switch. Data from I2C bus will determine whether this
video or the signal from the Y inputs is selected. The selected signal is
then output from the A/V Switch.
S Video
The Y and C signals from the S video jacks are input to the A/V Switch.
The Y and C inputs are switched directly out of the A/V Switch for normal
Main Video processing. They are also combined and output as compos-
ite video at the same point where the composite video is output. This
signal is sent to the Monitor Out jack.
Comb Filter
IC3504 is a 3D Comb Filter. This means that it separates the Y and C
signals in a composite video source by comparing the line it is processing
with the line above and below it, and also with the same lines in the previ-
ous and upcoming frame. This provides the ultimate in Y and C separa-
tion, avoiding dot crawl and other unwanted effects.
After processing by the Comb Filter, the Y signal becomes known as
Comb Y. Comb Y is sent back to the A/V Switch which selects between
Comb Y and Video 4 Y. The input chosen is switched out of the A/V
Switch and becomes Main Y.
ID 1 Decoder (FV26 only)
The Comb Y signal is also sent to the ID 1 Decoder in the FV 26 models.
ID 1 is a system where the video signal contains data that is “hidden” in
the vertical blanking area. This data is similar to Closed Caption data and
contains information about the aspect ratio of the picture. The “FV26”
model sets contain an ID 1 Decoder that is used to determine if the video
being received is 16:9. If it is and the user has selected the Auto Aspect
Ratio in the Menu, the set automatically switches to that mode.
Video 4 Component Input
The Pb and Pr signals are sent directly to the YUV Switch circuit on for
Main Video and to the PIP circuit. The Y signal is also input to one of the
Y inputs of the A/V Switch. When selected, it is output from the A/V
Switch to the Comb Filter circuit and then directly out to the Main Y output
of the A/V Switch. The signal sent to the Comb Filter will only be used for
ID 1 detection and V Chip detection. The Video 4 Y signal will be output
from the A/V Switch and sent to the YCJ for use by the sync circuits.
Note: There is no Monitor Out signal available when using the Compo-
nent Video inputs.
Main Video
If the main Y and C signals are from the Tuner or Video 1-3, they are input
to the YCJ. The YCJ decodes these signals and outputs them as YUV to
IC352 YUV Switch. The Main Y signal is also input to the Tuning Micon
for V Chip and CC Data.
If Video 4 input is selected, the Main Y signal will be used for V Chip and
sync creation purposes only. The YUV signals from the Video 4 input will
be input to IC352 YUV Switch.
The main picture comes from YUV signals decoded from Main Y and C,
or from the Video 4 component input. IC352 YUV switch selects between
these two sources. This picture is either switched directly to the YCJ or
mixed with the PIP signals and sent to the YCJ. The signal that is sent to
the YCJ is output after processing as RGB.
PIP
The AA2U chassis includes two-tuner PIP in all models except for the KV-
36FS12. The PIP IC is capable of creating a child picture from all of the
sources, including the Video 4 component input. The child picture can be
placed in any of the four corners of the screen in two different sizes.
Sub video from any of the input sources, except Video 4, is output from
the A/V Switch to the IC3308 YUV Switch. IC3308 YUV Switch selects
between the Video 4 Component video inputs and the Sub Video com-
posite input from the A/V Switch. The signal selected is sent to the PIP
inputs. The PIP inputs accept either component or composite inputs.
The PIP section compresses the sub video and outputs YUV and a switch-
ing signal to IC354 YUV Switch. These signals will be mixed with the
Main Video signals and output to the YCJ.