Mitsubishi Electric VS-45605 Installation guide

Projection Television
Technical Training
♦Features
♦Alignment Procedures
♦Circuit Descriptions
♦Block Diagrams
♦Troubleshooting Techniques
Models:
VS-45605 • VS-50605 • VS-50705
VS-55705 • VS-60705 • VS-70705
T
2000
ECHNICAL
RAINING
MITSUBISHI ELECTRIC
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
VZ7
Chassis
VZ7
Chassis
www.mitsubishi-tv.com

Copyright © 1999 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
VZ7 Chassis Technical Training
Table of Contents
Section 1 -- Introduction .......................................................................................................................1-1
Latest Technologies ..........................................................................................................................1-1
User Menus .......................................................................................................................................1-2
User Adjustments..............................................................................................................................1-3
Remote Control ................................................................................................................................1-4
Front Panel Buttons ..........................................................................................................................1-5
Diagnostic Mode...............................................................................................................................1-5
Main Chassis PCB Location .............................................................................................................1-6
CR Block Connectors .......................................................................................................................1-7
Section 2 -- Option Menu and Service Adjustment Mode.................................................................2-1
Option Menu .....................................................................................................................................2-1
Service Adjustment Mode.................................................................................................................2-2
Section 3 -- Convergence Adjustments ................................................................................................3-1
Static Convergence ...........................................................................................................................3-1
Convergence Mode Description .......................................................................................................3-1
CONV-MISC Function.....................................................................................................................3-1
Coarse Adjustment Mode .................................................................................................................3-2
Fine Adjustment Mode......................................................................................................................3-3
Fine Convergence Adjustment Description.......................................................................................3-4
General Adjustment Procedure .........................................................................................................3-8
Section 4 -- Convergence Circuitry......................................................................................................4-1
Overall Convergence Circuit.............................................................................................................4-1
DAC & LPF Circuitry.......................................................................................................................4-3
Amplifier/SummingCircuitry ............................................................................................................4-4
Convergence Output Amplifiers .......................................................................................................4-4
Convergence Control Circuitry .........................................................................................................4-7
Section 5 -- Power Supply .....................................................................................................................5-1
Standby Supplies ...............................................................................................................................5-1
Switch Mode Regulator ....................................................................................................................5-2
ON/OFF Circuitry .............................................................................................................................5-3
Deflection/HV Generated Supplies ...................................................................................................5-4
Switched Supplies Power Distribution..............................................................................................5-5
Troubleshooting ................................................................................................................................5-6
Section 6 -- Control Circuitry...............................................................................................................6-1
Basic Microprocessor Requirements ................................................................................................6-2
Input Commands...............................................................................................................................6-2
Overall Control Circuitry ..................................................................................................................6-3

V-Chip Circuitry ...............................................................................................................................6-4
AC OFF.............................................................................................................................................6-5
SHORT Circuit .................................................................................................................................6-6
X-RAY Protect .................................................................................................................................6-6
Single Function Inputs/Outputs ........................................................................................................6-8
Section 7 -- Video/Color Circuitry .......................................................................................................7-1
PIP/POP Feature...............................................................................................................................7-1
Overall Signal Path............................................................................................................................7-2
Main/Sub NTSC Decoders ...............................................................................................................7-4
PIP/POP Circuitry.............................................................................................................................7-4
VCJ Video/Color Internal Path .........................................................................................................7-6
GammaCircuitry...............................................................................................................................7-8
Blanking Insertion & CRT Protect....................................................................................................7-9
RGB Output Amplifiers & AKB.....................................................................................................7-10
On-Screen-Display Signal Path .......................................................................................................7-12
Section 8 -- Deflection Circuitry...........................................................................................................8-1
Deflection Drive Generator...............................................................................................................8-2
Horizontal & HV Output Circuitry...................................................................................................8-3
HV Regulation ..................................................................................................................................8-4
Scan Velocity Modulation .................................................................................................................8-5
Dynamic Beam Formation ................................................................................................................8-6
Vertical Output Circuitry...................................................................................................................8-7
Section 9 -- Audio Circuitry..................................................................................................................8-1
Audio Signal Path .............................................................................................................................8-1

Page 1-1
Section 1
Introduction
A total of six Projection TV Models use one of two
versions of the VZ7 Chassis. Two models use the
VZ7 Chassis and four models use the VZ7+ Chassis.
Table 1-1 lists the models and some of the main fea-
tures.
The VZ7 Chassis uses some of the latest technolo-
gies available, including those listed in Figure 1-1.
The VZ7 chassis has Digital Convergence and
Raster Correction circuitry. This not only affects
the circuitry, but also the Convergence and Raster
Correction Adjustments. Adjustments are covered
in Section 3, and the convergence circuitry is de-
scribed in Section 4.
Luminance/Chrominance separation is acheived
through the 3D-Y/Cprocess, a method that digitally
processes an entire video frame. This method pro-
duces results far superior than those that only pro-
cess two or three lines at a time such as Digital Dy-
namic or 2D-Y/C processing.
The PIP circuitry features the Picture out of Pic-
ture feature in VZ7+ Models. The PIP circuitry de-
scription is in Section 7.
Component Video Inputs are featured in all VZ7
models. They are labeled DVD Inputs, and consist
of three video Input jacks, plus Right and Left Au-
dio Jacks. The video jacks are denoted as Y, Cr and
Cb. This method allows the baseband Luminance
and Color Difference Signals to be coupled directly
from a DVD player, avoiding any signal degredation
that can be caused by chroma modulation and de-
modulation.
Basically the signals are Y (Luminance), R-Y, and
B-Y. In the NTSC format the three signals have the
followingamplituderelationship:
• Y = 0.7 Vp-p (plus sync)
• R-Y = 1.0 Vp-p
• B-Y = 1.3 Vp-p
VZ7 Chassis Model/Features
FEATURES VS-45605 VS-50605 VS-50705 VS-55705 VS-60705 VS-70705
Chassis VZ7 VZ7 VZ7+ VZ7+ VZ7+ VZ7+
Screen Size 45" 50" 50" 55" 60" 70"
DiamondShieldTM Optional Optional Included Included Included Included
Advanced PIP/POP PIP PIP PIP/POP PIP/POP PIP/POP PIP/POP
Digital Convergence X X X X X X
Digital Comb Filter 3DYC 3DYC 3DYC 3DYC 3DYC 3DYC
INPUTS
Rear A/V & S-Video 2 2 2 2 2 2
Front A/V & S-Video 1 1 1 1 1 1
Component Inputs (Y,CR&CB) 1 1 1 1 1 1
OUTPUTS
Video Monitor 1 1 1 1 1 1
Fixed/Variable Audio R/L 1 1 1 1 1 1
Table 1-1
Convergence & Raster Correction
• Di
g
ital Circuitr
y
Luminance/Chrominance Separation
• 3-D Y/C
PIP
• Picture out of Picture (Vz7+)
Component Inputs
• DVD Component Input Circuitry
Figure 1-1: VZ7 Chassis Circuitry

Page 1-2
MAIN MENU
• V-Chip Parental Lock
• Channel Edit
• Advanced Features
• Audio Video Settings
Figure 1-2:Main Menu
The designations Cr and Cb denote that the R-Y
and B-Y are reduced in amplitude, R-Y by a factor
of 0.71, and B-Y by 0.56. This results in the fol-
lowingsignalamplitudes:
• Y = 0.7 Vp-p (plus sync = 1.0 Vp-p)
• Cr = 0.7 Vp-p
• Cb = 0.7 Vp-p
User Menus
Figure 1-2 shows the Main Menu, listing four Sub
MenuCategories. Most ofthe MenuItems areclear.
Others warrant further explanation.
TheV-Chip ParentalLockenablesthe userto lock
out specific types of TV programming. Program
rating information is transmitted on the 21st hori-
zontal line during the vertical blanking interval.
The V-Chip lock out can be active at all times, set
for a specific time period every day, or turned off
completely. If the program on a selected channel is
locked, the screen goes blue and an on-screen dis-
play indicates that the program is locked. If the PIP
source program is locked, a black insert picture ap-
pears when PIP is activated.
One sub-menu item under Advanced Features is
the user's AdvancedConvergenceFeature. It dis-
playscomplete Crosshatchpattern allowingthe user
to adjust 64 intersections in the pattern. If the con-
vergence gets too far off, the user still has the op-
tion of selecting Reset to Factory Settings, in the
initial Convergence menu.
TheAVMemory,under Audio Video Settingshas
five AV Memory selections:
• Standard -- for typical viewing
• Daylight -- for daylight viewing
• Evening -- for evening viewing
• Home Theater
• DVD -- for DVD viewing
In each category, the video and audio controls are
set for optimum picture. The default control set-
tings for each of the AV Memory categories are
shown in Table 1-3.
User Adjustments
Most user adjustments will be made using the
VIDEO and AUDIO buttons on the remote con-
trol. Pressing the AUDIO button cycles through
six audio adjustments, or options:
1) Bass
2) Treble
3) Balance
4) Surround
5) Listen To
6) Level Sound
Pressingthe VIDEObutton sequencesthrough eight
video adjustments/options.
1) IRIS (On or Off)
2) Contrast
3) Brightness
4) Auto Picture (On or Off)
5) Sharpness
6) Tint
7) Color
8) Color Temperature (High, Medium or Low)
TheAutoPicturefeature,when activated, detects
the strength of the RF signal. Sharpness and Color
are automatically set to produce the optimum pic-
ture for that signal level. This option is only effec-
tive when using the TV's tuner.

Page 1-3
TheAGCvoltageis usedto determinesignal strength.
One of three signal levels can be detected:
• Weak signal -- less than 65 db
• Medium signal -- between 65 and 70 db
• Strong signal -- more than 70 db
On a strong signal, Sharpness and Color settings re-
main at their reset values. As signal strength de-
AV MEMORY
CATEGORY
ADJUSTMENT Standard Daylight Evening Home Theater DVD
Tint 31 31 31 31 31
Color 31 31 31 27 31
Contrast 63 63 63 45 63
Brightness 31 40 25 31 31
Sharpness 31 31 31 35 35
Color Temp. HIGH HIGH HIGH LOW LOW
Bass 31 35 35 31 31
Treble 31 35 35 31 31
Balance 31 31 31 31 31
Surround OFF OFF OFF OFF OFF
Level Sound OFF OFF OFF OFF OFF
Table 1-3
creases, both Sharpness and Color adjustments are
reduced.
When Auto Picture is ON, the normal adjustment
slide is not displayed for Sharpness and Color ad-
justments. It is replaced by the text "AUTO PIC-
TURE". During this display, pressing the right or
leftAdjustbutton willcancel theAuto Picturemode,
and the adjustment slide will be displayed.

Page 1-4
RemoteControl
The Remote Control for VZ7 models is illustrated
in Figure 1-3. Its functions are straightforward.
The numerical buttons 0 through 9, are used to
enter numerical values for Time Setting, Alarm set-
ting, V-Chip Lock Code, etc. The buttons are also
used to directly access a channel.
Thenumerical buttonschannel changeisa threedigit
system. Channels with less than three digits may be
accessed in one of three ways.
1) Add zeros prior to entering the channel
number, making it a three digit entry. Press
002 for channel 2.
2) Enter the channel number then press EN-
TER.
3) Enter just the channel number. There will
be a four second delay before the channel
change occurs.
When the QV (Quick View) button is pressed, the
TV changes to the previous channel selection. If
pressed again it returns to the original channel. Re-
peated pressing will toggle the TV back and forth
between the two channels.
When viewing a normal TV picture with no Menu
displayed, pressing Info activates the Detail Status
Display. This display includes:
• ChannelNumber
• Channel Name (if any)
• SAP, STEREO, CC, and SQV
• V-Chip rating (if any)
• Time display
Pressing Info in the user's Advanced Convergence
Mode,displays thefunctions ofthebuttons required
to set convergence.
Repeatedly pressing the "PIP/POP" button selects
thedesired PIPmode. The followingdescribes each
PIP feature and their sequence of activation.
1) Side by Side …the main and sub pictures
are displayed side by side. Both pictures are
compressed horizontally to fit on the 4:3
aspect screen.
2) Three Picture Channel Scan … the set
scans through channels, displaying the
content of three channels at a time in small
insert pictures. The insert for the current
channel in the scanning process is live, the
other two inserts are still pictures.
3) Single Insert Picture … ¼ normal size
insert picture in the lower right corner.
The single PIP can be moved with the Up/Down
and Right/Left buttons on the Remote. When se-
lecting a specific PIP feature, the "PIP/POP" button
must be pressed within 10 seconds to select the next
PIP/POP
PIP INPUT
PIP SIZE
EXCH
PIP CH
Figure 1-3: Remote Control

Page 1-5
feature. If the duration exceeds 10 seconds, pressing
"PIP/POP" terminates the PIP mode.
In the Single PIP Insert mode, the "Size" button al-
lows the user to select the size of the insert picture.
Five size selections are available, with the largest in-
sert equal to ¼ of the normal picture size.
In the PIP mode, the EXCH button swaps the main
and sub pictures. However this button has no effect
when Antenna B is the main picture source, and
Antenna A the sub picture source. Due to hardware
limitions:
• The Sub Tuner (Antenna A) is dedicated as
the PIP source.
• The Main Tuner (Antenna B) cannot be
selected as the PIP source.
Front Panel Buttons
Figure 1-4 shows the Front Panel buttons. Due to
dual functions of five of the buttons, 14 functions
can be performed. The primary function of the but-
tons is shown above each button. The secondary
functions are indicated below the buttons. The sec-
ondaryfunctions areactivated wheninamenu mode.
• Volume Up and Down becomes Adjust Up
and Down
• Channel Up and Down becomes Adjust
Right and Left.
• AV Reset becomes Cancel
Diagnostic Mode
TheDiagnosticMode assiststhe servicerin isolating
the source of a problem, particularly those problems
causingthe setto switchOFF(shutdown) duringnor-
mal operation. When the Diagnostic Mode is acti-
vated, the front panel On/Off LED flashes a digital
code indicating the source of the problem.
The Diagnostic Mode can be automatic or servicer
activated.
Automatic Diagnostics
This occurs automatically when the TV is first con-
nected to an AC power source. Immediately after
power is applied:
• The LED flashes three times... indicating the
µPC has been initialized and is functioning.
• The LED does not flash... indicating the µPC
is not functioning.
Servicer Activated Diagnostics
Pressing the front panel "Input" and "Menu" but-
tons at the same time, and holding them for 5 sec-
onds,activates theDiagnostic Mode. Thefrontpanel
buttons must be used, not those on the Remote Con-
trol.
Figure 1-4: Front Panel Buttons
CODE INDICATES
12 No error has occured
21 X-Ray Protect Shutdown
22 Short Protect Shutdown
23 Horizontal Deflection failure
24 Vertical Deflection failure
Table 1-4: Error Codes

Page 1-6
When the mode is activated, the front panel LED
starts flashing a two digit code:
1) The initial number of flashes denotes the
value of the tens digit (MSD) of the code.
2) Flashing pauses for ½ second.
3) The LED flashes the value of the ones digit
(LSD) of the code.
4) The code is repeated 5 times, then normal
operation resumes.
The two digit codes indicate what malfunction has
occurred,or thatno malfunctionhas occurred. Table
1-4 lists the two digit codes and their meanings.
Main Chassis PCB Location
Figure 1-5 shows the location of the PCBs, and ma-
jor components on the main chassis assembly. Two
major PCBs comprise the main chassis:
• PCB-MAIN
• PCB-SIGNAL
Circuitry on the PCB-MAIN includes:
1) Power Supply
2) Horizontal and Vertical Deflection
3) HV circuitry
4) X-Ray Protect
Figure 1-5: PCB Locations

Page 1-7
Signal processing circuits are located on the PCB-
SIGNAL. These include:
• Both Tuners
• Video Processing
• Color Processing
• Convergence Circuitry
• Audio Circuitry
The Control Microprocessor is also located on the
PCB-SIGNAL. To minimizecomponent clutter,this
PCB is double sided.
PCB-APERTURE plugs into the PCB-SIGNAL.
PCB-SVM, Scan Velocity Modulation and PCB-
DBF,Dynamic BeamFormation(or Focus),pluginto
the PCB-MAIN.
Note the Flyback Transformer and the HV Capaci-
tance/Resistance Divider are separate components.
The Flyback is mounted on the PCB-MAIN, and CR
Block is mounted on the Main Chassis Frame.
CR Block Connectors
Care must be taken when connecting the HV leads
to the CR Block. Figure 1-6 illustrates the type of
connector used on the CR Block. To disconnect a
lead:
1) Rotate the connector cap approximately 90o
counter clockwise.
2) The cap and the lead can then be pulled from
the CR Block.
To connect a HV lead, reverse the procedure. When
inserting the lead in the CR Block, insure that the
lead wire is not bent over. If the lead is bent inter-
nal arcing occurs and the CR Block can be damaged.
If any audible noise is heard from the CR Block, arc-
ing, sizzling, buzz, etc., check all HV Lead connec-
tions. This type of arcing can also be seen in the
picture in the form of dotted interference.

Page 1-8

Page 2-1
Section 2
Option Menu
and
Service Adjustment Mode
Option Menu and Service Adjustment items must be set to either a specific setting, data value or set accord-
ing to a prescribed adjustment procedure. For specific adjustment instructions, refer to the Service Manual.
For training purposes, the Option Menu setup and Service Adjustment procedures are reprinted from the
Service Manual.
1. Option Menu
Option Menu items should be set as shown in the figure below. The Initial function is also accessed from the
Option Menu. Performing an Initial setup will set all customer controls to the factory default condition. This
can be useful in determining if a symptom is caused by an improperly set customer control.
Follow the steps below for the Initial set-up:
1. Select the "MENU" display by pressing the "MENU" button once.
2. Press the number buttons "1", "2", "7", "0" in sequence to select the "OPTION MENU" display.
3. Press the "ADJUST" button to select "INITIAL."
4. Press "ENTER."
NOTE: At this time channel 3 is automatically selected.
CAUTION: On these models E2 RESET activation has been changed. To activate,
the "QV" button must be pressed while "E2 RESET" is selected on the menu
screen. The “QV” button may be denoted as “RCL” on some models.
This feature is for factory use only. DO NOT ACTIVATE E2 RESET AS
THIS WILL RESET ALL ALIGNMENT DATA. Doing so will require a full item by item
alignment of all data values listed in the "adjustment items" section
of this manual.
OPTION MENU
INITIAL
E2 RESET
POWER RESTORE: OFF
WHENMUTE: ON
DIRECT KEY MODE OFF
VS-70705 *NO
V-CHIP ON
SERIES SETTING: XXXXXXXX
SERIES SETTING: XXXXXXXX
*This option should be "YES" for model VS-7070
5

Page 2-2
INITIAL SETTINGS
Item Description Initial Setting Item Description Initial Setting
1 Input TV 11 TV IRIS OFF
2 Receivin
g
Channel 003 CH TV Contrast 100%
3 TV/CATV CATV TV Bri
g
htness 50%
4 RCL Recalls previous ch. TV Sharpness 50%
5 Channel Memory All CH (0,0) TV Color 50%
6 V-CHIP LOCK 12 Speaker ON
Lock by Time OFF 13 Back
g
round Gray
Lock Time 12:00 AM 14 Closed Caption On if Mute
UnlocK Time 12:00 AM 15 PIP SOURCE TV
7 Lock Channels OFF 16 PIP POSITION Lower Ri
g
ht
8 LOCK CODE - - - - 17 VIDEO MUTE OFF
9 VOLUME 30% 18 INPUT, NAME OFF All input name OFF
10 AUDIO FUNCTIONS 19 TIMER OFF
TV Listen to STEREO 20 SQV All CH CLEAR (deleted)
TV Bass 50% 21 A/V NETWORK OFF
TV Treble 50% 22 LANGUAGE En
g
lish
TV Balance 50% 23 NAME THE CHANNELS ALL LABELS CLEARED
TV Surround OFF 24 Locked to Input No
TV Level sound OFF 25 External Audio System No
11 VIDEO FUNCTIONS 26 Vol. chan
g
e by AV Rec. N/A
TV Tint 50% 27 Clock Time - -:- -
TV Color temp Hi
g
h 28 Set Day Sunday
After Initalization, customer controls are set according to the following tables.
AV MEMORY
AV MEMORY Standard Dayli
g
ht Evenin
g
Home Theater Component
TINT 31 31 31 31 31
COLOR 3131312731
CONTRAST 63 63 63 45 63
BRIGHTNESS 31 40 25 31 31
SHARPNESS 31 31 31 35 35
COLOR TEMP HIGH HIGH HIGH LOW LOW
BASS 31 35 35 31 31
TREBLE 31 35 35 31 31
BALANCE 31 31 31 31 31
SURRONG OFF OFF OFF OFF OFF
LEVEL SOUND OFF OFF OFF OFF OFF

Page 2-3
2. Circuit Adjustment Mode
Except for the following, all adjustment items must be performed
using the remote hand unit.
• Lens Focus
• Electrostatic Focus
A. Activating the Circuit Adjustment Mode
1. Press the "MENU" button on a remote hand unit.
2. Press the number buttons "1", "2", "5", "7" in sequence.
The screen will change to the Adjustment Mode.
Note: Repeat steps 1 and 2 if the circuit
adjustment mode does not appear
on screen
B. Selection of adjustment Functions and
Adjustment Items
To select an adjustment item in the circuit adjustment mode,
first select the adjustment function that includes the specific
adjustment item to be selected. Then, select the adjustment
item.
Refer to the following pages for the listing of adjustment
functions and adjustment items.
1. Press the "AUDIO" button on a remote hand unit to
select an adjustment function. Each time the button
is pressed, the Function changes in the following
sequence:
2. Press the “VIDEO” button to select a specific
Adjustment Item. The Item number increases each
time the “VIDEO” button is pressed.
C. Changing Data
After selecting an adjustment Item, use the “ADJUST
UP/DOWN” button to change data.
• Press “ADJUST DOWN” to decrease the data value.
• Press “ADJUST UP” to increase the data value.
123
56
789
0
SQV QV
4
POWER
HOME
PAUSE
REC
FF/FWDREW/REV PLAY
STOP
VOLUME
INFO
CANCEL MENU
PIP/POP
PIP SIZE
PIP CH
INPUT
SLEEP
VIDEO
AUDIO
MUTE
CHANNEL
ENTER
PIP INPUT
EXCH
GUIDE
TV AUDIO
CABLE/DBS DVD
VCR
ENTER
VIDEO
AUDIO
ADJUST
UP/DN
MENU

Page 2-4
D. Saving Adjustment Data
Press “ENTER” to save adjustment data in memory. The character display turns red for
approximately one second in this step.
Note: If the circuit adjustment mode is terminated without pressing “ENTER”, changes
in adjustment data are not saved.
E. Terminating the Circuit Adjustment Mode
Press the “MENU” button on the remote hand unit twice to terminate the adjustment mode.
Note: The circuit adjustment mode can also be terminated by turning power OFF.
F. Direct Key Mode
This feature is for Factory Use Only. It enables access to the Service Adjustment Modes by using the
VCR buttons on the remote control.
1. Activate the Factory Option Menu (MENU-1-2-7-0)
2. Change the option for “DIRECT KEY MODE” from OFF to ON.
3. Exit the Option Menu (Press “MENU” twice).
4. Service Adjustment Modes can now be activated using the following VCR buttons on the remote:
• “REWIND”...activates the Circuit Adjustment Mode
• “PLAY”........ activates the Coarse Convergence Mode
• “STOP”....... activates the Fine Convergence Mode
• “PAUSE”..... activates the Factory Option Menu
5. After performing adjustments, set the “DIRECT KEY MODE” option back to OFF.
IMPORTANT
If the “DIRECT KEY MODE” is not turned OFF:
• The VCR buttons will not control a VCR
• The user has access to the Adjustment Modes

Page 3-1
Convergence Adjustments in the VZ7 chassis are
divided into two major categories, Static and Dy-
namic. The Static Convergence Adjustment has not
changed. However, the Dynamic Convergence Ad-
justment has changed, due to using Advanced Digi-
tal Convergence circuitry.
Dynamic Convergence is performed in the Conver-
gence Adjustment Mode. Coarse Dynamic Adjust-
ments are performed first, followed by Fine Adjust-
ments. The digital circuitry, and Adjustment Proce-
dure provides a higher degree of raster geometry and
convergence correction over the entire picture, than
was possible in the past.
In addition to Dynamic Convergence, the Conver-
gence Mode is used to adjust HV Regulation and:
1) Set Initial Data Values for the:
• Convergence Waveform Generator
• Green Raster Coarse Geometry Adjust-
ments
• Red Dynamic Coarse Convergence Ad-
justments
• Blue Dynamic Coarse Convergence
Adjustments
• Dynamic Focus Settings
2) Perform most Raster Geometry Adjustments
• Width and Horizontal Linearity
• Pincushion Correction
• Skew (X axis tilt), and Tilt (Y axis tilt)
• Vertical Keystone
Note that Data Values and Adjustments for Raster
Geometry in the Circuit adjustment mode must be
setprior toperforming RasterGeometry adjustments
in the Convergence adjustment mode. These proce-
dures are described in the Service Manual.
Section 3
Convergence Adjustments
Convergence Mode Description
Toactivate the ConvergenceMode, press MENU-
1-2-5-9, in sequence. The screen changes to an in-
ternally generated Cross Hatch pattern. The Cross
Hatch is super imposed on the current selected sig-
nal source. To display the Cross Hatch with a black
background, prior to entering the Convergence
Mode, select an External Input with no signal ap-
plied as the source.
Once in the Convergence Mode, several Functions,
Modes or displays can be selected:
1) Pressing (1) (2) or (3) respectively acti-
vates a Red Green or Blue display
2) Pressing (6) activates the CONV-MISC
function
3) Pressing (5) activates the Coarse Adjust-
ment Mode
4) Pressing (4) activates the Fine Adjustment
Mode
TheCONV-MISCFunction is used to perform the
HV Regulation Adjustment, and to preset the data
values controlling the Convergence Waveform Gen-
erator. Table 3-1 lists the items and preset values
under CONV-MISC. Some of the data values are
model specific. Check the Service Manual for a spe-
cific model to verify the correct preset values.
Asin theService AdjustmentMode, theVIDEO but-
ton selects the Adjustment Item, and the ADJUST
buttonsset theDataValue. IntheConvergence Mode
it is not necessary to press ENTER to save data
changes. Changes are automatically saved when the
mode is terminated.

Page 3-2
When HV Regulation, Item (0), is selected the cross
hatch is replaced with a black raster. A black raster
is required to perform this adjustment.
In the Coarse Adjustment Mode, the AUDIO but-
ton selects the following sub functions:
• CONV-GREEN --- Green Cross Hatch
• CONV-RED --- White Cross Hatch
• CONV-BLUE --- White Cross Hatch
• DF --- White Cross Hatch
In all the Coarse Adjustment Sub Functions, the
VIDEO button selects the Adjustment Item, and the
ADJUST, Up and Down buttons set the data.
CONV-GREEN is used to set Coarse Raster Ge-
ometry Correction. The Adjustment Items are listed
in Table 3-2. Before performing the adjustments in
Table 3-2, set the Vertical Height and Linearity Ad-
justmentsunder the VCJFunction inthe ServiceAd-
justment Mode.
The adjustments under CONV-GREEN include
Width, Pincushion, X and Y axis Tilt, and Vertical
Keystone.
CONV-RED and CONV-BLUE are used to per-
form Red and Blue Coarse Dynamic Convergence
Adjustments. In both the Red and Blue modes, a
white Crosshatch is displayed. However, only Red
is adjustable in the Red Mode, and only Blue in the
Blue Mode.
The Adjustment Items under CONV-RED, and
CONV-BLUE, are shown in Tables 3-3 and 3-4,
respectively. These adjustments include:
CONV MISC
ADJ
NO. ABBR. DESCRIPTION DATA NOTES
0 HVOL HV DC Control Voltage 140 HV Regulation
1 VINT Interpolation Value (0=NTSC, 1=line db) 0 Preset
2 HINT Horiz. Interpolation Value (0 Req'd) 0 "
3 COUT Conv. IC Output Mode (0=Analog, 1=Digital) 1 "
4 HPLL 1= HPLL Divider Value (256=NTSC) 1 "
5 VSTR Vertical Offset Value 0 "
6 VCNT Vertical Count Value 56 "
7 STLN Sets the Vertical Position of the Crosshatch 31 "
8 FPHS Fine Phase of Correction Wrt. Hor. Blk. 233 "
9 CPHS Phase Coarse Adjustment 20 "
10 DPHS Phase of Dynamic Focus Wrt. Hor. Blk. 40 "
11 TPHS Sets the Horizontal Position of the Crosshatch 48 "
12 HDLY Phase of Hblk (out) Wrt. Hor. Blk. 0 "
13 PLWD Pulse Width of Hblk. (out) 8 "
14 PWM2 Pulse Width of PWM-2 Output for 2H 6 "
Table 3-1
CONV GREEN
ADJ
NO. ABBR. DESCRIPTION RANGE DATA NOTES
0 HSTA Horiz. Position ±511 +6 Coarse Raster Correction
1 SPCC Side PCC ±511 -182 "
2 HWID Width ±511 -66 "
3 SKEW x Axis Tilt ±511 +1 "
4 VSTA Vertical Position ±511 +88 "
5 VKEY Vertical Keystone ±511 -14 "
6 TBPC Top/Bottom PCC ±511 -270 "
7 TILT Y Axis Tilt ±511 -7 "
Table 3-2

Page 3-3
• Horizontal Width, Linearity and Bow.
• Vertical Keystone
• X and Y Axis Tilt
Set the coarse adjustments so that the red (or blue)
converges on the green crosshatch, at the center of
the top, bottom, and sides of the screen.
IfStatic Convergence shiftsduring coarsealignment,
use HSTA and VSTA, items 0 and 5, to correct the
shift.
DF (Dynamic Focus) is used to preset the data val-
ues controlling the Dynamic Focus circuitry. There
are only two items under the DF Sub Function, as
shown in Table 3-5. Set the Items to the data values
given in the Service Manual for that specific model.
The Fine Adjustment Mode is activated by press-
ing(4), wheninthe Convergence Mode. Inthismode
the On-screen Data Display changes, and a blinking
Cursor appears on the Cross Hatch. There are two
sub modes of Cursor operation:
1) Cursor Move (blinking cursor)
2) Adjust Data (non-blinking cursor)
The ENTER button toggles the mode between Cur-
sor Move, and Adjust. In the Move Mode the AD-
JUST buttons move the Cursor. In the Adjust Mode,
the ADJUST buttons set the horizontal and vertical
position, of Red, Green or Blue, at the current Cur-
sor position.
The AUDIO button toggles the Adjust Mode Color,
Green, Red, and Blue. For a quick reference, the
Convergence Mode General Procedure is illustrated
graphically in Figure 3-1.
CONV RED
ADJ
NO. ABBR. DESCRIPTION RANGE DATA NOTES
0 HSTA Horiz. Position ±511 +71 Coarse Red Convergence
1 HLIN Horiz. Linearity ±511 -231 "
2 SKEW x Axis Tilt ±511 +15 "
3 HWID Width ±511 +21 "
4 HSBW Horiz. Bow ±511 +60 "
5 VSTA Vertical Position ±511 +30 "
6 VKEY Vertical Keystone ±511 -250 "
7 TILT Y Axis Tilt ±511 -7 "
Table 3-3
CONV BLUE
ADJ
NO. ABBR. DESCRIPTION RANGE DATA NOTES
0 HSTA Horiz. Position ±511 +50 Coarse Blue Convergence
1 HLIN Horiz. Linearity ±511 +263 "
2 SKEW x Axis Tilt ±511 +7 "
3 HWID Width ±511 +9 "
4 HSBW Horiz. Bow ±511 -125 "
5 VSTA Vertical Position ±511 +39 "
6 VKEY Vertical Keystone ±511 +153 "
7 TILT Y Axis Tilt ±511 -7 "
Table 3-4

Page 3-4
The following describes the effect of Fine Adjust-
ments in more detail.
Fine Adjustment Effect
When the Fine Adjustment Mode is entered, the
screen changes to that shown in Figure 3-2, with a
Green Cross Hatch. The Cursor is flashing, indicat-
ing the Move Cursor mode. The mode name and
data values are also displayed.
Although not shown on the screen, horizontal and
vertical coordinates are assigned to the Cross Hatch
pattern. The coordinate designations are shown in
Figure 3-3. Note that not all the Cross Hatch lines
havecoordinate designations. Fine Adjustmentscan
be performed at the intersections of those lines with
coordinates assigned.
The Vertical coordinates range from 0 to 9, and the
Horizontal coordinates from 0 to 8. Vertical coordi-
nates 0 and 9, and horizontal coordinate 8, are out-
DF (Dynamic Focus)
ADJ
NO. ABBR. DESCRIPTION RANGE DATA NOTES
0 DFH Dynamic Focus - Horiz. ±511 -300 Preset
1 DFV Dynamic Focus - Vertical ±511 -159 "
Table 3-5

Page 3-5
side the picture area (off the screen). If the Cursor is
located at these coordinates it will not be visible, and
must be moved to the visible area of the screen, us-
ing the ADJUST buttons.
Horizontalcoordinates 0and 7are alsooffthe screen.
However, they are close enough to the edge of the
screen so part of the cursor is visible. Adjusting the
vertical position at these points effects the horizon-
tal cross hatch lines at the sides of the screen. The
sameis truefor verticalcoordinate8. Adjusting hori-
zontal position effects the vertical crosshatch lines
at the extreme bottom of the picture.
The shaded circles in Figure 3-3 indicate the cross-
hatch intersections that can be adjusted. There are a
total of sixty four cursor positions to make fine ad-
justments on the crosshatch.
NOTES: ___________________________________________________________________________
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