Mitsubishi V19-V21 User manual

MITSUBISHI ELECTRIC
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
T
2002
ECHNICAL
RAINING
Projection Television
Technical Training Manual
V19-V21
V19-V21
V19 CHASSIS
WS-55859 WS-48511 WS-65511
WS-55909 WS-B55 WS-65611
WS-65909 WS-55511 WS-65711
WS-65869 WS-55711 WS-65712
WS-73909 WS-73711
V21 CHASSIS
DIGITAL
AUDIO
OUTPUT
IR
EMITTER
HOME
THEATER
CONTROL
ANT-DTV
MEMORY
CARD
IEEE
-1394
INPUT/
OUTPUT

1
Chapter 1 ... Introduction
Features ............................................................................................................ 1-1
External Inputs & Outputs .................................................................................... 1-4
Remote Control .................................................................................................. 1-6
LED Diagnostics ............................................................................................... 1-6
Chapter 2 ... NetCommandTM
NetCommandTM .................................................................................................. 2-1
IEEE-1394 Devices .................................................................................... 2-1
Remote Operational Mode ......................................................................... 2-1
Chapter 3 ... Disassembly & PCB Location
Rear Disassembly ............................................................................................. 3-1
Light Box Removal ..................................................................................... 3-1
Chassis Removal ............................................................................................... 3-2
Main Chassis PCB Location .............................................................................. 3-2
Main Parts Location ........................................................................................... 3-2
DM Module Main Parts Location ........................................................................ 3-3
Chapter 4 ... Adjustments
Activation Codes ............................................................................................... 4-1
Adjustment Mode ............................................................................................... 4-2
Function Nomenclature ............................................................................... 4-2
OSD Position Mode ........................................................................................... 4-2
Convergence Mode ........................................................................................... 4-2
HD Convergence With No Signal ................................................................ 4-3
Chapter 5 ... Power Supply
Overall Block Diagram ....................................................................................... 5-1
Standby Supplies Switch Mode Regulator .......................................................... 5-2
Switched Supplies Switch Mode Regulator ........................................................ 5-3
On/Off Circuitry ........................................................................................... 5-3
DM Power Supply .............................................................................................. 5-5
DC Supply Source Locations ............................................................................. 5-7
Chapter 6 ... Control Circuitry
Overall Block Diagram ....................................................................................... 6-1
Input Command Circuitry .................................................................................... 6-2
Serial Data Lines ............................................................................................... 6-3
DC Supplies ...................................................................................................... 6-4
Reset Circuitry ................................................................................................... 6-4
V-Chip Blocking Circuitry ................................................................................... 6-5
AC-OFF Circuitry ............................................................................................... 6-6
Additional Inputs and Outputs ............................................................................. 6-7
V19-V21 TRAINING MANUAL
TABLE of CONTENTS

2
DM Module Control Circuitry .............................................................................. 6-7
Software Update Procedure ....................................................................... 6-9
DM Module Replacement ......................................................................... 6-10
Chapter 7 ... Video/Color Circuitry
Overall Block Diagram ....................................................................................... 7-1
NTSC Signa Selection ....................................................................................... 7-2
PCB-SIGNAL Video Color Signal Path .............................................................. 7-3
3DYC/Main Decoder Circuitry ............................................................................ 7-4
YCbCr Select Circuitry ....................................................................................... 7-5
VCJ Video/Color Signal Path............................................................................. 7-6
RGB CRT Drive & Protect Circuitry .................................................................... 7-8
Monitor Out Video/Color Signal Path .................................................................. 7-8
DM Module Video/Color Block Diagram .......................................................... 7-10
Chapter 8 ... Deflection and High Voltage
Sync Block Diagram .......................................................................................... 8-1
Sync Signal Path ................................................................................................ 8-2
Deflection and High Voltage ............................................................................... 8-3
HV 12 Volt Supply .............................................................................................. 8-4
HV Regulation .................................................................................................... 8-5
X-Ray Protect .................................................................................................... 8-5
Deflection Loss Detection .................................................................................. 8-6
Flash Protect Circuit........................................................................................... 8-7
Chapter 9 ... Sound Circuitry
Overall Block Diagram ....................................................................................... 9-1
Signal Path ........................................................................................................ 9-2
AC-3 Output ....................................................................................................... 9-3
Chapter 10 ... Convergence Circuitry
Overall Block Diagram ..................................................................................... 10-1
Waveform Generator and D/A Converter .......................................................... 10-2
LPF and Summing Amplifiers .......................................................................... 10-3
Convergence Output Circuitry ........................................................................... 10-4
Chapter 11 ...Troubleshooting Tips
Using the Front Panel LED ............................................................................... 11-1
DM Module Check ........................................................................................... 11-1
NetCommandTM Control Problems .................................................................... 11-1
CRT Phosphor Protection ................................................................................ 11-1

1-1
Chapter 1
Introduction
The V19 and V21 are Mitsubishi’s high end Projection
TV chassis for 2 years. Specific models for each chas-
sis type are listed above. Both chassis types have fea-
tures not available in previous models. These features
include:
• IntegratedATV Tuner
• System 5 A/V Network
• NetCommandTM Home Theater Control
• IEEE 1394 Inputs/Outputs
• HAVi Compatibility
• 5C Copy Protection
• Record Timer for IEEE1394 D-VCR
Other features include:
• Five Picture Format modes
• Picture Format Memory by Input
• IR Repeater Outputs
• PIP-POP features (V19)
• PIP-POP and Multi PIP features (V21)
• Composite and S-Video Monitor Outputs
• Sub Picture Sound Outputs.
• Analog DTV, Component and VGA Inputs.
Differences between the V19 and V21 are software
related:
• Streamlined NetCommand Setup Menus.
• Multiple PIP.
• Different Service MenuAccess Codes.
In addition to cosmetic differences, the main difference
between various models are optical improvements in the
higher end models.
V19 CHASSIS
WS-55859 WS-48511 WS-65511
WS-55909 WS-B55 WS-65611
WS-65909 WS-55511 WS-65711
WS-65869 WS-55711 WS-65712
WS-73909 WS-73711
V21 CHASSIS

1-2
Due to the new added features, some terminology and
abbreviations used are new. Table 1-1 lists the defini-
tions for some of the new terminology.
The Integrated ATV Tuner enables reception of
HDTV signals without using an external Set Top Box.
The ATV Tuner and its’associated circuitry is also ca-
pable of receiving Cable QAM digital signals, when not
scrambled.
NetCommandTM simplifiies the control of Home The-
ater System devices. It controls compatible analog, digi-
tal and HAVi components using only the TV layer of the
Remote Control.
When the Remote “Device”button is pressed an on-
screen display shows all devices in that Home Theater
System. An example of a Device Select Display is shown
below.
The user selects the device using the “Direction”but-
tons, then presses “Enter”. Compatible devices are ac-
tivated and corresponding input selections are automati-
cally performed. The initial NetCommandTM setup pro-
cedure is described in Chapter 2.
NetCommandTM controls Home Theater components
by two methods:
1) Legacy Devices (System 5 compatible) are
controlled through IR Blasters connected to the
System 5 IR Output Jacks.
2) IEEE-1394 compatible components are
controlled over cables connect to the 1394
Jacks.
IEEE-1394 is a system used to transmit digital data
streams over cable. The system may also be referred
to as “Firewire®”. Basically it can be considered a pipe-
line to transfer digital information from one unit to an-
other.
Terminology Defitition
ATV Advanced TV
AV Audio Video
AV/C 1394 AV Control Format
DCM Digital Control Module
FAV Full Audio Video
HAVi Home Audio Video Interoperability
(Digital AV Devices, 1394 compliant)
IEEE-1394 Digital Transmission System using cables
IR Infra-red
Legacy Devices AV System 5 Compatible Components
QAM Cable HDTV Signal
5C Copy Protection (mainly used in Cable)
Table 1-1: Definititions
Device Select Display
PC D-VHS DVD
Ant A
Ant A

1-3
When used with consumer Audio Video products it
transfers digital data streams for DTV and Digital Cable
Boxes. This includes MPEG2 HDTV data streams.
When components are 1394 compatible, interconnec-
tion of the units is simplified. Figure 1-1 illustrates how
the 1394 system simplifies interconnection between the
DTV and a D-VCR.
Figure 1-1A shows the connections between a DTV
and D-VCR when components are not 1394 compat-
ible. Six cables are required to transfer analog signals
from one unit to the other. In addition, control of the
VCR would be from an IR Blaster signal or directly
from the D-VCR’s Remote.
Figure 1-1B shows a single 1394 cable connection be-
tween a DTV and the D-VCR that are 1394 compliant.
There are two types of 1394 Cables:
•6 wire –two wires for data transfer, two wires
for timing, and two wires for power.
•4 wire –two for data transfer and two for
timing.
Figure 1-2 shows an IEEE-1394 4 wire cable, used in
consumer Audio Video. It consists of two pairs of
twisted wires. Each pair is separately shielded, and then
the entire cable is shielded. This minimizes any interac-
tion between conductors. 1394 cables may be up to
40 feet in length.
Home Theater components that are not System 5
or 1394 compatible can usually be controlled through
the TV by one of two methods.
1) Using the corresponding Mitsubishi remote
layer, Cable, VCR, DBS or DVD.
2) Using that component’s Remote Control and an
IR Blaster connected to the IR Repeater Jacks.
5C Copy Protection
5C Copy Protection prevents copying restricted sig-
nals. There are three levels of 5C Copy Protection:
1) Unlimited Recording allowed.

1-4
2) One Recording allowed.
3) No Recordings allowed.
At present, only QAM (Digital Cable Signals) are coded
with 5C Copy Protection. When the V19 detects a
Copy Protected signal, that signal is not output at the
Monitor Outputs of the TV.
Monitor Output Sources
There are only two sources that output signals at the
Monitor Outputs, NTSC signals and signals from the
ATV Tuner (when not Copy Protected).
Timer Recording
Mitsubishi's HS-HD2000U and HS-HD1100U, D-
VCRs includes HDTV recording capability and HAVi.
However it must be connected to an externalATV Re-
ceiver with a IEEE-1394 interface, such as in the V19
chassis. Time Shift Recording allows recording from
the V19’sATV Tuner without turning the TV On, only
the TV’s signal circuits are activated. The Time Shift
Recording time can be pre-programmed so the user does
not have to be present to activate the recording.
External Inputs & Outputs
Analog External Inputs and Outputs are located both
on the rear and front of the TV. Figure 1-3 shows the
External Analog Inputs and Outputs. The DTV Inputs

1-5
are still available even though a Set Top Box is not needed
to receive HD broadcasts. In the V19 these inputs are
mainly used to connect a Digital Broadcast Satellite
(DBS) to the TV.
The IR Emitter Repeater outputs are for connecting IR
Blasters to controlAV devices that are not System 5 or
1394 compatible. Signals from other manufacturer’s
remotes are amplified in the TV and output from the
Repeater Jacks.
Digital Analog Inputs & Outputs are located on the
rear of the TV and are shown in Figure 1-4. These
include:
•ANT-DTV …Antenna or Cable Input (ATSC
or QAM)
•Three 1394 Jacks …to connect external 1394
compatible devices
•Two System 5 IR Emitter Jacks …for IR
Blasters controlling external System 5 devices.
•DigitalAudio Output …AC-3®digital output
for connection to an external device with an
AC-3®Decoder.
Display Formats
Figure 1-5 illustrates the Display Formats possible in
the V19. Pressing the “FORMAT”button on the Re-
mote Control changes the Display Format. Note that

1-6
all five Display Formats can only be accessed when the
signal source is 480i. When the source is 480p, only
Standard and Narrow can be activated, and when the
source is 1080i only Standard is available.
The Format memory is by input. When a Display For-
mat is selected for an Input, that format will be activated
when that input is selected again.
POP/PIP Features
POP/PIP features are illustrated in Figure 1-6. They
are similar to those in previous models. In addition to
PIP-POP V21 has multi-PIP capabilitys. Only 480i
format signals can be selected for POP/PIP main and
sub pictures. POP pictures can be viewed in either the
“Standard”or “Expand”format.
In the Standard Format main POP pictures are sym-
metrical and there are dark areas at the top and bottom
of the picture. In the Expand Format, the main picture
is compressed horizontally and stretched vertically, re-
moving the black areas.
Remote Control

1-7
Figure 1-7: V19 Remote
The Remote Hand Unit for the V19 appears the same
as that in previous models, refer to Figure 1-7. How-
ever there are two differences.
•The "INPUT" button is changed to "DEVICE".
•There are two operational modes, Standard
and NetCommandTM.
The Remote for the V21 is physically larger but has the
same basic functions. See Figure 1-8.
The Remote Hand Unit comes in the Standard Mode
so the TV can be controlled in the normal fashion. To
use NetCommandTM, the Remote Hand Unit must be
changed to the NetCommandTM mode. Changing the
Remote operational mode is described in Chapter 2.
LED Diagnostics
The LED Diagnostic Mode, used in some previous
models is carried over in the V19 and V21 with some
additional features. This helps isolate the source of shut-
down problems by counting how many times the front
panel LED flashes. For details on this feature, refer to
Chaper 11.
AC-3®is a registered trademark of Dolby
Laboratories, Inc.
FireWire®is a registered trademark of
Apple Computers, Inc.
Figure 1-8: V21 Remote

1-8

2-1
Chapter 2
NetCommandTM
The NetCommandTM feature in the V19 and V21 is an
enhanced user simplified Home Theater Control Sys-
tem. It provides graphic control of an entire Home The-
ater System through the TV. It controls existing analog
devices along with New Digital Home Theater devices.
NetCommandTM uses System 5 to control Home
Theater components with IR Blasters, and also con-
trols HAVi capable devices over 1394 cables.
When a TV is first installed, the Setup Wizard automati-
cally displays a series of Initial Setup Screens to config-
ure System 5. It allows entry of all devices connected
to the TV. When the Initial Setup is complete,
NetCommandTM is automatically activated. For specfic
instructions on setup and use, refer to the Owner's Guide
and NetCommand Guide.
Set the Remote to the TV Layer
NetCommand POWER 9-3-5
Standard POWER 0-0-0
Press and Hold Press in Sequence
Figure 2-12: Change Remote Operation Mode
IEEE-1394 Devices
The TV automatically detects when an IEEE-1394 de-
vice is connected. The user will be asked to select a
name for that device that will be displayed in the Device
menu.
Remote Operational Mode
Before the NetCommandTM feature can be use, the Re-
mote Hand Unit must be set to the NetCommandTM
operational mode. To change to the NetCommandTM
mode:
• Set the Remote to the TV Layer
• Point the Remote away from the TV
• While holding the "Power" button, press "9-3-
5" in sequence.
Figure 2-12 illustrates how to change to the
NetCommandTM mode, or to the Standard mode.

2-2

3-1
Chapter 3
Disassembly & PCB Locations
There are no radical changes in the disassembly of
V19 models. Figure 3-1 shows the cabinet rear dis-
assembly for V19 models. The Light Box is still re-
movable as a unit, as shown in Figure 3-1. Of course
all front panel PCBs and the speakers must be dis-
connected before the Light Box can be removed.
Figure 3-1 shows one major change to the Light Box
assembly, the addition of the Digital Module (DM)
on the left side. The ability to remove the CRTs,
main chassis and DM as a unit, facilitates servicing.
Only the Light Box is needed to troubleshoot most
problems. So only the Light Box can to be taken to
the shop, rather than the complete set.

3-2
Accessing The Main Chassis
The Main Chassis can still be accessed as is in previ-
ous models.
1) Loosen wire ties on cables to the CRTs, front
panel, speakers, etc.
2) Remove the three chassis mounting screws
(a), shown in Figure 3-2.
3) Release the chassis locks on the front of the
chassis, shown in Figure 3-3.
4) Slide the chassis out the rear of the cabinet.
The DM Module is attached and will slide
back with the chassis.
5) Tilt the chassis upward to access the bottom
of the PCBs.
In some cases, Cable length will not allow the DM
to slide back with the chassis. If this occurs:
1) Remove the three DM mounting screws (b),
in Figure 3-2.
2) Slide the DM Module out the rear of the
unit.
3) Then slide the chassis out the rear of the
unit.
NOTE: The DM Module must be connected to the
main chassis, or the TV will not switch On.
Main Chassis PCB Locations
Figure 3-3 shows the location of PCBs that com-
prise the main chassis. The following PCBs are plug
in and are considered replaceable components:
•PCB-3DYC
•PCB-2HDW
•PCB-CONV-GENE
•PCB-JUNGLE
•PCB-DBF
PCBs SIGNAL, POWER and MAIN are not con-
sidered replaceable, an troubleshooting must be to
component level.
Main Parts Location
For a reference, Figure 3-4 shows the location of
the major components in the main chassis. Figure 3-
5displays the component layout inside the DM.

3-3

3-4
DM
POWER
SUPPLY
ATV
TUNER
DE-
MODULATOR
E2P
MODULE
FLASH CARD
SLOT COVER
Figure 3-5: DM Module Main Components

4-1
Chapter 4
Adjustments
The individual Adjustment Procedures for the V19 and
V21 are basically the same as in previous models, and
are described in the Service Manual. Therefore, they
don't require repeating here. There are some changes
in the Adjustment Procedure process in the V19/V21
Chassis. The changes iclude:
•Change in the "Mode Activation Codes".
•Change in On-screen nomenclature of some
"Adjustment Functions".
•New OSD Position Adjust Mode.
•Change in the procedure to activate the
"Convergence HD Mode" with no signal.
The OSD Position Mode is new. In previous models,
OSD position was set in the HR Function of the
Adjustment Mode. The V19/V21 uses a separate
mode, with its' own activation code to position the OSD.
Activation Codes
For a quick reference, Table 4-1 lists the codes for the
V21 and previous chassis types.
Chassis Option Menu Adjustment Mode Convergence Mode OSD Position
VZ5 1-3-7-0 2-3-5-7 2-3-5-9 <6><5><4> Adjust Mode
VZ6 "" " "
VZ7 1-2-7-0 1-2-5-7 1-2-5-9 <6><5><4> "
VZ8 "" " "
VZ9 0-1-7-0 0-1-5-7 0-1-5-9 <6><5><4> "
V15 1-3-7-0 2-3-5-7 2-3-5-9 <6><5><4> "
V16 1-2-7-0 1-2-5-7 1-2-5-9 <6><5><4> "
V17 8-2-7-0 8-2-5-7 8-2-5-9 <6><5><4> "
V18 0-1-7-0 0-1-5-7 0-1-5-9 <6><5><4> "
V19 0-1-7-0 0-1-5-7 0-1-5-9 <6><5><4> 0-1-8-8
V20 2-2-7-0 2-2-5-7 2-2-5-9 <6><5><4> Adjust Mode
VK20 2-2-7-0 2-2-5-7 2-2-5-9 <6><5><4> Adjust Mode
V21 2-1-7-0 2-1-5-7 2-1-5-9 <6><5><4> 2-1-8-8
Table 4-1: Service Menu Access Codes

4-2
Adjustment Mode
Outside of the activation code, the procedure
for the "Adjustment Mode" is the basically
same as in previous models. Figure 4-1 illus-
trates the "Adjustment Mode" procedure.
One of the changes in the "Adjustment Mode"
is the on screen nomenclature used for some
of the "Adjustment Functions. The changes
are shown in Table 4-2
In the Adjustment Mode VC Function,
pressing "3" toggles the signal mode be-
tween 480i, 480p, 1080i, DM and VGA.
DM is an added signal format, but is only
available for possible future use. When "3"
is pressed, data changes are not automati-
cally saved. Therefore, press "ENTER"
save data before pressing "3".
OSD Position Mode
The horizontal position of the OSD is set in this mode.
The OSD Position must be set in both the SD (Stan-
dard Definition), and HD formats. The procedure for
setting OSD Position is given Figure 4-2.
Convergence Mode
Like the "Adjustment Mode" the only change in the
"Convergence Mode" procedure is the activation
code. Figure 4-3 graphically shows the general "Con-
vergence Mode" procedure.
One additional change is the procedure on how to acti-
vate the HD Convergence Mode when no HD signal is
available
Previous Models V19/V21 Chassis
Video/Chroma VC
Jungle JNGL
Main Matrix MNTS
Sub Matrix SNTS
Audio AUD
Table 4-2: Adjustment Function Changes
SD OSD Horizontal Position Procedure
1) Select an NTSC signal (Ant-A or Ant-B).
2) Press "MENU-0-1-8-8" or "MENU-2-1-8-8"
3) Use the Adjust Buttons to adjust OSDSD data to center the
On Screen Display.
4) Press "MENU" to save data and exit the mode.
HD OSD Horizontal Position Procedure
1) Select an HD signal (DTV Inputs).
2) Press "MENU-0-1-8-8" or "MENU-2-1-8-8"
3) Use the Adjust Buttons to adjust OSDHD data to center the
On Screen Display.
4) Press "MENU" to save data and exit the mode.
Figure 4-2: OSD Position Adjustment Procedure