Copyright 2002 by Zenith Electronics Corporation
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS
A.C
d
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-visual service
technicians.
When servicing this product, under no circumstances should the original
design be modified or altered without permission from Zenith Electronics
Corporation. All components should be replaced only with types identical to
those in the original circuit and their physical location, wiring and lead dress
must conform to original layout upon completion of repairs.
Special components are also used to prevent x-radiation, shock and fire hazard.
These components are indicated by the letter “x” included in their component
designators and are required to maintain safe performance. No deviations are
allowed without prior approval by Zenith Electronics Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes into
the set is not delayed until the new service literature is printed.
CAUTION: Do not attempt to modify this product in any way. Never perform
customized installations without manufacturer’s approval. Unauthorized
modifications will not only void the warranty, but may lead to property damage
or user injury.
Service work should be performed only after you are thoroughly familiar with
these safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle is intended
to alert the service personnel to important safety information in
the service literature.
The lightning flash with arrowhead symbol within an equilateral
triangle is intended to alert the service personnel to the presence
of noninsulated “dangerous voltage” that may be of sufficient
magnitude to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an
equilateral triangle is intended to convey to the service personnel
the following fuse replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED
NEAR EACH FUSE.
SERVICE INFORMATION
While servicing, use an isolation transformer for protection from AC line shock.
After the original service problem has been corrected, make a check of the
following:
FIRE AND SHOCK HAZARD
1. Be sure that all components are positioned to avoid a possibility of
adjacent component shorts. This is especially important on items transported to and from the repair shop.
2. Verify that all protective devices such as insulators, barriers, covers,
shields, strain reliefs, power supply cords, and other hardware have been
reinstalled per the original design. Be sure that the safety purpose of the
polarized line plug has not been defeated.
3. Soldering must be inspected to discover possible cold solder joints, solder
splashes, or sharp solder points. Be certain to remove all loose foreign
particles.
4. Check for physical evidence of damage or deterioration to parts and components, for frayed leads or damaged insulation (including the AC cord), and
replace if necessary.
5. No lead or component should touch a receiving tube or a resistor rated at
1 watt or more. Lead tension around protruding metal surfaces must be
avoided.
6. After re-assembly of the set, always perform an AC leakage test on all exposed
metallic parts of the cabinet (the channel selector knobs, antenna terminals,
handle and screws) to be sure that set is safe to operate without danger of
electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS
TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in
the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by
a .15 mfd 150V AC type capacitor between a known good earth ground
water pipe, conduit, etc.) and the exposed metallic parts, one at a time.
Measure the AC voltage across the combination of 1500 ohm resistor and
.15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor
and repeat AC voltage measurements for each exposed metallic part. Voltage
measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp
AC. Any value exceeding this limit constitutes a potential shock hazard and
must be corrected immediately.
Good Eart h Ground
such as the Water
Pipe, Conduit, etc.
X-RADIATION
1. Be sure procedures and instructions to all service personnel cover the
subject of x-radiation. The only potential source of x-rays in current TV
receivers is the picture tube. However, this tube does not emit x-rays when
the HV is at the factory-specified level. The proper value is given in the
applicable schematic. Operation at higher voltages may cause a failure of
the picture tube or high-voltage supply and, under certain circumstances
may produce radiation in excess of desirable levels.
2. Only factory-specified CRT anode connectors must be used.
3. It is essential that the service personnel have available an accurate and
reliable high-voltage meter.
4. When the high-voltage circuitry is operating properly, there is no possibility
of an x-radiation problem. Every time a color chassis is serviced, the
brightness should be run up and down while monitoring the high voltage
with a meter, to be certain that the high voltage does not exceed the
specified value and that it is regulating correctly.
5. When troubleshooting and making test measurements in a product with a
problem of excessively high voltage, avoid being unnecessarily close to
the picture tube and the high voltage power supply. Do not operate the
product longer than necessary to locate the cause of excessive voltage.
6. Refer to HV, B+, and shutdown adjustment procedures described in the
appropriate schematics and diagrams (where used).
IMPLOSION
1. All direct view picture tubes are equipped with an integral implosion
protection system; take care to avoid damage during installation.
2. Use only the recommended factory replacement tubes.
TIPS ON PROPER INSTALLATION
1. Never install any receiver in a closed-in recess, cubbyhole, or closely
fitting shelf space over, or close to, a heat duct, or in the path of heated
air flow.
2. Avoid conditions of high humidity such as: outdoor patio installations
where dew is a factor, near steam radiators where steam leakage is a factor,
etc.
3. Avoid placement where draperies may obstruct venting. The customer
should also avoid the use of decorative scarves or other coverings that
might obstruct ventilation.
4. Wall- and shelf-mounted installations using a commercial mounting kit
must follow the factory-approved mounting instructions. A product mounted
to a shelf or platform must retain its original feet (or the equivalent
thickness in spacers) to provide adequate air flow across the bottom. Bolts
or screws used for fasteners must not touch any parts or wiring. Perform
leakage tests on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in a
tilted position, unless the receiver is properly secured.
6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small
casters across thresholds or deep pile carpets.
7. Caution customers against using a cart or stand that has not been listed
by Underwriters Laboratories, Inc. for use with its specific model of
television receiver or generically approved for use with TVs of the same or
larger screen size.
8. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous
consequences to home and family.
. Voltmeter
0.15uF
1500 OHM
10 WATT
Place this probe
on each expose
metal part .
SR24 - 923-03509CS - SAFETY
i
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS
N
X-RADIATION
To prevent possible exposure to radiation caused by excessive
CRT Anode voltage, the CS Chassis incorporates a “High Voltage Shutdown” circuit. This circuit senses the level of flyback
pulse from the “Flyback Transformer” representative of the
actual high voltage on the CRT anode. When this level exceeds a predetermined voltage, the circuit shuts down the
horizontal drive, preventing further generation of anode voltage. In this condition, the horizontal drive is “latched” off for
about 5 seconds, after which, restart is attempted.
SHUTDOWN CIRCUIT OPERATION
The flyback pulse voltage from Pin 6 of TX3201 (Flyback Transformer) is peak detected (rectified) by the action of diode
D3206 and capacitor C3214. This forms a DC voltage appearing on C3214 representative of the CRT anode voltage (HV)
produced by T3201. This voltage is divided down by precision
resistors RX3214, RX3215, RX3216 & RX3217. This lower voltage, appear on the non-inverted input (pin 5) of IC3201.
If the CRT anode voltage become excessive, pin 5 of IC3201
will be higher than inverted input of pin 6. This will cause the
output of pin 7 to rise to approximately 15 volts. This signal
(SD_DRV) is sent to the base of Q4000 causing Horizontal
Drive to be disabled and latched, which causes the HV to
shutdown. In about 5 seconds, the shutdown circuit resets
(Pins 8, 9 & 14 of IC2900), the Horizontal Drive and HV will be
reestablished. The circuit formed by Q2907, C2913, C2916,
D2908, R2923, R2935, R2936, and R2937 disables the HV
compensation output (Q2902-b signal) during turn on and shutdown conditions (transients).
CRT ANODE HIGH VOLTAGE MEASUREMENT PROCEDURE
Each CRT screen has it’s own safe operating Anode Voltage
and shutdown voltage. Critical Safety components (designated
with an ‘X’ in the component designator) are designed to
operate the CRT at a safe operating Anode voltage and provide proper shutdown thresholds. If replacement of any of
these components is deemed necessary, it is important to use
original type Zenith replacement components.
After a replacement is made, confirm proper Anode voltage
using the following procedure.
Measurement of the CRT Anode voltage must be performed
with no visible raster on the screen and operating at nominal
horizontal scanning frequency 15.734 or 37.9 Khz (TV or SVGA
signal).
After discharging the CRT, connect a high impedance high
voltage meter to the CRT anode. Turn the television ‘On’ and
confirm good signal is being displayed. Reduce Brightness
and Contrast settings until the picture is well extinguished.
Observe the Anode voltage meter reading and compare with
the table below for the proper CRT screen size. If the voltage
reading is higher than the maximum, verify circuit component
values and proper operation.
HV SHUTDOWN MEASUREMENT PROCEDURE
1. Adjust the beam current to 0 mA in NTSC mode.
2. Apply a variable DC voltage to pin 10 of the PTD1 connector, from 20 to 0 Vdc, starting at 20 Vdc.
3. Slowly decrease supply towards zero.
4. Remove DC voltage from pin 10 of PTD1.
5. After approximately 5 seconds, verify that the HV is reestablished (High Voltage Reset).
LARGE SIGNAL PCB ................................................. 5-5
SMALL SIGNAL PCB TOP ........................................... 5-6
SMALL SIGNAL PCB BOTTOM ..................................... 5-7
SR24 - 923-03509 TOCCS - TOC
SECTION 1
OVERVIEW
IC5141
VIDEO OUTPUT
G2
IC5121
5F4
2K6
2G9
10VGA1
2B4
2C5
2C4
6F1
2P6
8VGA2
IC1400
ICX2900
JACKPACK
1
4A8
4B8
2G4
2A3
2H4
2V4
2S2
IC801
1
CRT1
DAG2
4T8
FOCUS
DAG1
IC5161
ICX3400
1
LX3400 4R8
1
5C2
1
TX3401
TERMINAL 3RD WIRE
GROUND FOR HOSPITAL
AND EDUCATIONAL
MARKETS
EX3400
Q2904
PTD2
DX3200
RED
PTD1
4H2
4G2
4D3
BLUE
4
X
4
4Y4
4V2
1
ICX2100
4B2
4A3
D3404
4C2
4F5
AA
Q3202
Q4103
QX3200
T
3
D4102
T4000
2
0
1
The CS series chassis will be used on the E-Line Commercial Products. The Presentation Series PC-to-TV monitor
receivers were designed for educational and business
applications. This manual covers 27, 32, and 36 inch
screen sizes. The concept of this chassis is to make one
main board for all models and one power supply board
for all models in a particular screen size. Additional plug
in boards with jack packs may be added to the chassis
to accommodate the different features.
The CS series chassis features 11 IC’s and 3 peripheral
devices for all signal, sync and sweep processing. The
ICX2200 handles the Base Band signal processing, the
RGB processing, and video switching for 4 systems (HV
sync signal processing included).
ICX2201 integrates the luminance signal processing,
Chroma signal processing, and the sync signal. The
ICX2600 was developed for various types of direction
compensation for point scan/multi scan TVs. The IC1400
includes functions such as stereo modulation, SAP (Separate Audio Program), dBx noise reduction, and sound
processing. The IC2900 is an A/V switch which determines which auxiliary video and audio signals will be
processed by the video processor, also it can switch the
IF video signal. IC6000 is the main microprocessor and
IC6001 is the main memory.
All CS models are module level repair only. The table below contains basic information on the Presentation Series. For more datails please see the Interconnect Diagram in this Manual (section 5).
H27E46DT 27 Table Top11VGA card and MPI card800x600124-00233-04
H27E46DT8 27 Table Top11VGA card and MPI card800x600124-00233-04
H32E46DT 32 Table Top11VGA card and MPI card800x600124-00233-04
H36E46DT 36 Table Top11VGA card and MPI card800x600124-00233-04
P221-1391-P07
P221-1391-P07
P221-1391-P07
P221-1391-P07
206-03755
206-03755
206-03755
206-03755
SR23 - 923-035091-1CS - GENERAL
CONNECTIONS
CONNECTIONS
The connection center on the rear of the TV allows for
connection of the viewing source. The diagrams on the
next page list the use of each jack on the connection
center.
OUTPUTS
S-Video Loop out luminance is on pin 34 and chroma is
on pin 32 of ICX2900. The analog stereo comes from
pins 6 and 7 of IC1400 before running through a preamplifier circuit. After the pre-amp stage, the audio passes
to the jackpack.
CAMPORT
Some models have video and right/left audio input jacks
on the front of the receiver. These jacks can be used to
view video tapes from a VCR or Camcorder. When the
video cable is plugged into the jack, the shorting jack
J1 opens, placing a high at pin 10 of the IC6000 microprocessor. This switches the TV into the auxiliary mode.
As long as the cables are attached, the TV set will be
locked in auxiliary mode. Use of a remote control or
buttons on the front of the set will not permit switching into tuner mode until the video cable is discon-
nected.
SUPERPORT - MPI
Zenith Commercial Product receivers are now being
adapted to interact with other equipment. Prime examples of this can be found in Lodging and Health Care
situations where the set is controlled from the main office.
All this is made possible by the new technology that is
being built into these receivers. The SuperPort or Multiple Protocol Interface (MPI) jack and associated circuitry allow remote operation of the set.
MULTIPLE PROTOCOL INTERFACE
Television functions and features are controlled by the
communication of commands and status information
through the Superport by the MPI interface.
EBC (EDGE BOARD CARD)
Allows easy access for removing/installing accessory
modules providing a rail mounted slide-through card.
SR23 - 923-035091-2CS - GENERAL
CONNECTIONS
CONNECTION CENTER
1. COMPUTER VIDEO INPUT (HD15)
Standard DB15 receptacle for SVGA input video signal
from either PC or Macintosh format. This provides a
“Flicker-Free” view of the computer.
2. ANTENNA/CABLE JACK
This jack is used for 75-ohm antenna-type signal connections to the TV. Attach antenna, cable TV line, or
other video equipment to jack. The input cable may come
from an outdoor or master antenna, cable TV line, cable
decoder box, or the RF output from a VCR.
3. S-VIDEO IN AND OUT
These jacks are for input and output connections to
SUPER-VHS video equipment. Use the input jack for viewing S-Video. Use the output jack to loop the S-Video
signal to an additional TV or monitor. The right and left
audio jacks are used for the stereo input or output paired
with the S-Video Signal.
4. VIDEO IN AND AUDIO IN
Use the Video and Audio In jacks for baseband video
and audio input signals from a VCR or other signal source.
To view the signal input to these jacks, select the AUX
channel on the TV.
5. COMPUTER AUDIO IN
These jacks provide left and right audio input that can
be paired with the computer data input.
6. AUDIO OUT
These jacks provide preamp audio out to be used with
an external amplifier.
7. MPI (MULTIPLE PROTOCOL INTERFACE) JACK
Standard RJ11 jack to provide interface with in-room
entertainment and video services. Also used with the
installer’s remote control for programming other TVs in
the system with the same features as the master TV.
8. POWER INDICATOR
The Scan Card power indicator LED (if the set has a Scan
Card).
9. SUPERPORT
Allows easy installation of an accessory module without
removing the cabinet back. Module is housed inside the
TV cabinet and receives operating power and all necessary interface signals through internal connections.
S-VIDEO IN
VIDEO
COMPUTER
AUDIO
AUX IN
3
--AUDIO--
RL
--AUDIO--
RL
--AUDIO--
RL
4
5
1
9
2
ANTENNA
C
CABLE
O
M
P
U
T
E
R
I
N
M. P.I.
S-VIDEO OUT
R
AUDIO OUT
L
7
6
SR23 - 923-035091-3CS - GENERAL
p
p
CONNECTIONS
CONNECTING TO A COMPUTER
Installed in the certain units is the PCZTV internal scan
converter, provided by FOCUS Enhancements, Inc. This
allows the receiver/monitor to be used as a large screen
device to view VGA video output of a PC or Macintosh
format computer. In order to view these computer images, connect the computer to the Super Port input,
turn on the receiver/monitor, set it to the appropriate
source and activate your computer.
ANTENNA
C
CABLE
VIDEO OUT
O
M
P
U
T
E
R
I
N
M. P. I.
S-VIDEO IN
S-VIDEO OUT
R
AUDIO OUT
L
Connect to the audio output
on the com
VIDEO
COMPUTER
--AUDIO--
RL
AUX IN
--AUDIO--
RL
--AUDIO--
RL
AUDIO
uter.
Connect to the
video output on
the computer
(DB 15).
In addition, the computer images may also be recorded
onto video tape if a VCR is connected in as shown in the
illustration.
ANTENNA
CABLE
C
O
M
P
U
T
E
R
I
Connect to the video
input on the VCR.
VIDEO OUT
N
M. P. I.
Connect to the audio
in
S-VIDEO IN
S-VIDEO OUT
VIDEO
R
AUDIO OUT
L
COMPUTER
ut on the VCR.
--AUDIO--
RL
AUX IN
RL--AUDIO--
--AUDIO--
RL
AUDIO
FORMATS
Compatible Video Formats
ResolutionRefresh
640 x 48060 Hz
640 x 48072 Hz
800 x 60060 Hz
800 x 60067 Hz
1024 x 76760 Hz
DOS TEXT70 Hz
640 x 48067 Hz
832 x 76867 Hz
CABLE AND ACCESSORIES KIT
Included with this new receiver/monitor is an accessories kit which provides the necessary items for connecting a computer to the Super Port jack. The kit includes
the following:
Accessories Kit
QuantityAccessory Item
1
1
1HD DB15 Female to DB15 Male adapter.
1
CONNECTIONS
If the computer provides video out via a DB15 jack (15
pins aligned in two rows), the HD DB 15 to DB15 adapter
will have to be used. Plug the DB15 side of the adapter
into the DB15 video out of the computer. Then connect
the 15-foot video cable, between the HD DB15 side of
the adapter and the HD DB15 jack of the Super Port.
15 foot VGA interconnect cable. HD DB15
Male to HD DB15 Male.
10 inch Computer Video interconnect cable.
Male phone to Male phono (Cable C).
3½ floppy disk: Accessory Video driver
software.
(Instructions included separately)
SR23 - 923-035091-4CS - GENERAL
CONNECTIONS
d
p
HD DB15
(15 pins aligned
in thre e rows)
DB15
(15 pins aligne
in two rows)
HD DB15 Femal to DB15 Male Ada
ter
DB15 Pin Descriptions
Pin ConnectionPin Connection
1Red Video Input9No Connection
2Green video Input10 Digital/Sync (mode)
3Blue Video Input11 Reserved (mode)
4Reserved12 No Connection
5Reserved (test)13 Horizontal Sync
6Red Video Ground14 Vertical Sync
7Green Video Ground15 No Connection
8Blue Video Ground
USING PCZTV
Once the connections to the receiver monitor have been
completed, the receiver/monitor can be used to view
images from the computer.
1. Turn on the receiver/monitor
2. Tune the receiver/monitor to the appropriate source.
3. Turn on the computer.
4. The computer images should be visible on the screen.
RECORDING THE COMPUTER IMAGE
If your VCR has an video input jack, the computer images can be recorded to video tape. Connect the VCR as
described by the illustration on the previous page.
This jack pack provides L/R audio input paired with computer data input which will allow recording of audio
along with the video images. Your computer must provide audio out that can be connected to the jack pack
input on the receiver/monitor.
CHOOSING A DESKTOP PATTERN
Because of a television’s low resolution (as compared to
that of a computer monitor), avoid using computer desktop patterns that consist of elaborate designs or colors.
These can tend to vibrate or distort on the screen.
The recommended desktop pattern is either Black, a limited gray design, or some other solid dark color.
VIDEO DISTRIBUTION AMPLIFIER
If your receiver/monitor will be part of a closed circuit
network using a cable that is longer then 25 feet, or if
several sets will be used together using the loop out
jack, then a video distribution amplifier will probably
be necessary to ensure adequate signal strength is provided. These types of amplifiers can be purchased separately in many consumer audio/video stores.
VIDEO ADJUSTMENT
Adjustments to the computer video image are controlled
through the remote control. The 2 and 8 buttons shift
the display vertically. The 4 and 6 buttons shift the display horizontally. 1 is Zoom, 0 is freeze, and 5 gives
menu access.
SR23 - 923-035091-5CS - GENERAL
REMOTES
FLASHBK (Flashback)
Returns to previous Channel.
SURF
Turns Surf Channel On/Off
CHANNEL (Up/Down)
Selects next channel in
TV’s memory. Press
and hold to repeat.
NUMBER PAD
Selects channels directly.
REMOTE INFO
PRG
CABLE
SURF
VCR
FLASHBK
CHANNEL
VOLUME
CHANNEL
1
4
POWER
AUX
MUTE
VOLUME
3
2
5
6
POWER
Turns TV On or Off.
TV
MODE
Selects the remote's mode of operation
MUTE
Turns sound Off and On
while picture remains.
VOLUME (Left/Right)
Increases TV’s sound level.
ENTER
Shows Channel/Time, enters
channel, or removes any
on-screen menus.
MENU
Displays menus for TV
and other options.
LEFT/RIGHT ARROWS
Chooses and shows the
desired menu option.
A, B, C Keys
Special features of some TV’s
TIMER
Displays the Sleep Timer menu.
Press repeatedly to set desired
TV shut-off time.
7
0
MENU
A
RECORD
REWIND
B
PAUSE
8
ENTER
C
TIMER
PLAY
STOP
MBR3447C
124-00233-04
9
TV/VCR
SOURCE
FFWD
QUIT
CC
QUIT/(Three Functions Key)
Exits from on-screen display, turns
the sound enhancement feature on
or off, and switches audio between
Main source and PIP source.
UP and DOWN ARROWS
Moves highlighted bar within
menu to select an option.
CC
Displays closed caption menu.
TV/VCR SOURCE
Steps through source options.
SR23 - 923-035091-6CS - REMOTES
REMOTE INFO
PROGRAMMING THE REMOTE
If you’re using Zenith products, the remote is already
programmed for most common codes: TV = 101, VCR =
201, CABLE = 353, and AUX = 401. For other brands, or
if your remote fails to control your Zenith products, you’ll
have to program the remote.
After installing the batteries, follow these steps for each
product:
1. Press and hold PRG using a blunt pointed object.
Release PRG after the indicator light turns on.
2. Press the device button to be programmed (CATV,
VCR, AUX, or TV).
3. Enter the 3-digit product code from chart on next
page.
4. Press and release ENTER to save the code.
5. Point the remote at product and press POWER to test
the product’s operation. If it does not turn on,
reprogram remote using a different code.
6. Write the codes on the label inside the battery
compartment for future reference.
AUTO FIND
If none of the codes in the code table operate your
equipment, use Auto Find to search for the proper code.
1. Turn on the product you want to operate.
2. Press and hold PRG using a blunt pointed object.
Release PRG after the indicator light turns on.
3. Press the key to be programmed (CATV, VCR, AUX, or
TV).
4. Enter “000”, then press ENTER within two seconds.
Auto Find is active after the indicator light flashes
and remains lit.
5. Point the remote at the product.
6. Press and release POWER repeatedly, about once a
second, until your product turns off. The indicator
light turns off when you press POWER and on when
you release it.
7. Press ENTER immediately to save the code. The
indicator light flashes to indicate the code has been
saved.
8. Press POWER to turn On your product.
9. Test your product. If the remote fails to operate some
of the basic functions, use Auto Find again to search
for a better code. (Auto Find resumes its search after
the last code that was entered and saved in step 7).
NOTE: If the indicator light stays on as you press
POWER, Auto Find has tried all of the codes. If
the product you want to control has not turned
off, your remote will not work with that product.
To cancel Auto Find, press PRG at any time during
Auto Find.
CABLE BOX
This remote can control the cable/converter box volume
and muting (instead of the TV’s) if available on your
equipment.
1. Program the cable/converter box normally.
2. After programming the cable/converter box, Press and
hold PRG again using a blunt pointed object. Release
PRG after the indicator light turns on.
3. Press and release the device button the cable box is
assigned to.
4. This time, enter the special code 3-9-9 instead of
the product code.
5. Press and release ENTER to save.
VOLUME OVERRIDE
These remotes can override TV, VCR, or Video Disk Player
volume functions with an amplifier’s volume and muting.
1. Program the amplifier normally.
2. After programming the amplifier, Press and hold PRG
again using a blunt pointed object. Release PRG after
the indicator light turns on.
3. Press and release the device button whose volume
control is to be replaced by the amplifier volume
control. For example, pressing TV will operate the
amplifier’s volume while the remote is in TV mode.
4. This time, enter the special code 4-9-9 instead of
the product code.
5. Press and release ENTER to save.
AUXILIARY CAPABILITY
This remote can control up to seven devices. If the remote has been programmed for four components using
the TV, VCR, CABLE, and AUX keys, you may also program
it for up to three additional using AUX+1, AUX+2, and
AUX+3.
TO PROGRAM AUX+1, AUX+2, AND AUX+3
1. Locate three-digit code for product in code table.
2. Press and hold PRG until indicator lights up.
3. Press the AUX and 1 simultaneously to select AUX+1.
4. Enter the three-digit code and press ENTER. The indicator light should flash and then turn off to indicate
the code has been accepted. If the light stays on,
repeat steps 3 and 4 or try a different code.
5. Repeat steps 2-4 for AUX+2 and AUX+3.
6. Write the codes on the label inside battery compartment for future reference. Hold down AUX and press
1, 2, or 3 to access AUX+1, +2, or +3 mode.
SR23 - 923-035091-7CS - REMOTES
REMOTE INFO
o
TV's
Daewoo149ProScan216,260,266,Sprucer313Sharp441,442
Zenith101,121,149282,725Stargate326,379Sherwood449
152Quasar259 ,29 5St andard Co mp33 5Hit achi950
TV/VCR
Adventura TV/VCR154240,242,249,Tocom317,318,34 6Luxman930
Daewoo TV/VCR148260,266,282,Unika325,348,362M agnavox421,422,433,
Funai TV /V CR154283,284,285,Universal325,358,362434
Goldstar TV/VCR153,172286,287,288,V id Tech340Sony420,443,444,
Symphonic TV/VCR154708,710,711,Video Way349445,934
Zeni th TV / VC R150, 153 ,15472 5V iew star3 27,3 54,3 55,So undesig n4 61,49 8,9 01,
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Akai292,717,718,Samsung220,230
719,720Sansui289,292,709,Alphastar516Zenith CD Rec
Audio Dynamics726726Chaparral501,502Zenith460,461,498,
B ell + Ho well2 47Sanyo2 12 ,24 7,29 4Cheyenne50 29 01,90 2
Broksonic221,250,255,Scott243,290,729Dishnet515
The Quick Set II programmer LT2000 (or LT1500) allow
custom setup and programming information to be quickly
copied from a master TV into multiple television sets.
The LT2000 can clone programmable labels, but the
LT1500 cannot. Once learned from the master, setup data
is retained in the LT2000 for future use and recall.
When using the LT2000, operation will be easier if the
TV is connected to a good quality signal and displaying
a stable picture. To operate the LT2000, use the indicated
keys on an installer’s remote or user’s remote, or the front
panel keys on the TV receiver.
SETUP
Begin the programming process by setting up a master
TV set using one of the installer’s remotes or an MBR
remote. Follow the instructions in the operating guide
for the specific TV model. Remember to set all features
that will be customized including the channel scan list,
channel labels, and installer menu setups.
Next connect the LT2000 to the master TV set using
the cable provided with the programmer. Connect the
cable between the MPI jack on the TV and the
programmer. The TV set automatically activates the
programmer.
Once connected, check the “Status Indicator” LED on
the programmer. If the indicator is green and flashing
(a double-blink “heartbeat” pattern), proceed to the
next step.
NOTE: A slowly flashing green light indicates there is
a problem with the communications between
TV and programmer. In this case, check for
damaged cable, poor contacts, or other
connection problems. If the status indicator is
red, the programmer batteries are low.
If communications are good, the sign-on screen will be
displayed on the TV screen as shown on the quick setup
instructions. If the intention is to set the TV’s or
programmer’s real-time clocks, and not the clone clock
or TV clock time settings, then press a key to proceed
to the main clone menu.
If a previously stored TV setup is in a particular clone
memory, it may be changed if desired by overwriting it
with a new setup. There is no need for a separated
memory clear operation. Setups stored in programmer
memory are nonvolatile and will be retained even after
a battery change.
LEARN FROM TV
Select “Learn From TV” then press ON/OFF, POWER, or
ENTER to begin learning process. Alternatively, use the
TV front panel CHANNEL UP or CHANNEL DOWN keys to
highlight choice. Press ON/OFF, POWER, or ENTER to
activate. The next screen will allow a choice of four
available memories to store this TV setup. Four different
TV setups can be stored in the LT2000.
Using the On-screen menu, choose a memory or choose
to return to the main selection menu. Now press ON/
OFF, POWER, or ENTER to activate your selection. The
next screen allows one last opportunity to check the
versions of TV and clone setups.
Press ON/OFF or POWER to activate the learning cycle,
or press any other keys to return to the selection menu
to make another choices.
Once a process has begun, the TV screen will display
“LEARNING IN PROGRESS”. Please wait for the process to
complete. When the TV screen displays “LEARNING
COMPLETED”, press any key to end the learning process
and return to the clone selection menu.
TEACH TO TV
Select “TEACH TO TV”, and then press ON/OFF, POWER,
or ENTER to begin teaching process. Alternatively, use
the TV front panel CHANNEL UP or DOWN keys to
highlight the choice and then press ON/OFF, POWER, or
ENTER to activate. The next screen displays a choice of
the four available memories that can be copied to the
TV. Select the desired memory number, and press ON/
OFF, POWER, or ENTER to begin the teaching process.
Alternatively, use the TV front panel CHANNEL UP or
DOWN keys to highlight choice. Press ON/OFF, POWER,
or ENTER to begin.
SR23 - 923-035091-9CS - REMOTES
REMOTE INFO
Using the on-screen menu, select a memory or return
to the main selection menu. Then press ON/OFF, POWER,
or ENTER to activate the selection.
The next screen allows for one last opportunity to check
the versions of TV and clone setups. Press ON/OFF or
POWER to activate the teaching cycle, or any other key
to return to the selection menu to make other choices.
Once a process has begun, the TV screen will display
the “TEACHING IN PROGRESS” message. Please wait for
the process to complete. When the TV screen displays
“TEACHING COMPLETED”, press any key to end the
teaching process and return to the clone selection menu.
SET CLONE CLOCK FROM TV
To set the real-time clock in the LT2000, select “SET
CLONE FROM TV” and then press ON/OFF, POWER, or ENTER
to copy current TV time to the clone clock. Alternatively,
use the TV front panel CHANNEL UP or CHANNEL DOWN
keys to highlight the choice. Then press ON/OFF, POWER,
or ENTER to activate.
This process will return the LT2000 to the sign-on screen
to display the clone and TV clock settings. Press a key
to go to the clone selection menu and perform other
functions, or simply disconnect if the time setting was
the last task.
SET TV CLOCK FROM CLONE
To set the real time clock in the, select “SET TV CLOCK
FROM CLONE” and then press ON/OFF, POWER, or ENTER
to copy current LT2000 time to the TV clock.
Alternatively, use the TV front panel CHANNEL UP or
CHANNEL DOWN keys to highlight the choice. Then press
ON/OFF, POWER, or ENTER to activate.
This process will return the LT2000 to the sign-on screen
to display the clone and TV clock settings. Press a key
to go to the clone selection menu and perform other
functions, or simply disconnect if the time setting was
the last task.
DISPLAY TV SETUP
Select “DISPLAY TV SETUP”, and then press ON/OFF,
POWER, or ENTER to begin the teaching process.
Alternatively, use the TV front panel CHANNEL UP or
CHANNEL DOWN keys to highlight your choice. Then press
ON/OFF, POWER, or ENTER.
The TV screen will display the items in the service menu
setups. Use this function to quickly check the TV for
correct setup. Press any key to clear display and return
to the clone selection menu.
DISPLAY CLONE SETUP
Select “DISPLAY CLONE SETUP” and then press ON/OFF,
POWER, or ENTER to begin the teaching process.
Alternatively, use the TV front panel CHANNEL UP or
CHANNEL DOWN keys to highlight the choice, then press
ON/OFF, POWER, or ENTER to begin.
The TV screen will display the memory selection menu.
Select the desired memory number, and then press ON/
OFF, POWER, or ENTER to display the contents of the
selected memory. Alternatively, use the TV’s CHANNEL
UP or CHANNEL DOWN keys to highlight the choice, then
press ON/OFF, POWER, or ENTER to begin.
The TV screen will display items in the factory menu
setup. Use this function to quickly check contents of a
particular clone memory for correct setup. Press any
key to clear the display and return to the clone selection
menu.
Note: The following two items only appear on sets
that do not have the built-in ability to clone
channel labels.
EDIT CHANNEL LABELS
Select the edit channel labels option and push ON/OFF,
Power, or Enter. Select the memory location (1,2,3,4)
and edit.
VOL L/RSelects update label
CH U/DSelects label to be changed
MUTEClears present setting
ENTERLoads new labels
POWERExits the menu
SEND CHANNEL LABELS
Select the send channel labels option and push ON/
OFF, Power, or Enter. Select the memory location
(1,2,3,4) and push ON/OFF. A message will indicate that
is doing the copy and when it is finished.
OPERATION NOTES
Disconnect the LT2000 from the TV set when the desired
task has been completed. Disconnecting the clone
automatically switches it off. The real time clock
continues to run when the main circuits are switched
off.
After replacing exhausted batteries, or if the programmer
behaves strangely after a static shock, use a paper clip
or similar instrument inserted through the small hole
marked “RESET” to activate the internal reset switch
and restore normal operation. After reset, check the
real-time clock setting. It may be necessary to reset
the clock from a TV programmed to the correct time.
The specific microprocessor used in any TV set may be
determined by activating the service menu. The
microprocessor part number appears at the top of the
screen with the service menu is activated. Processors
before the 221-01006 have limited screen display
capability. They cannot display entire screens as shown
in the quick setup instructions accompanying the
LT2000 programmer. Use the printed menu illustrations
on the quick setup sheet as an aid in making
programming choices.
SR23 - 923-035091-10CS - REMOTES
USER MENUS
USER MENUS 905-10533
SETUP MENU
The Setup Menu and all of the options for Presentation
Chassis are described below.
Note: This menu is not available while the set is in
computer mode.
SETUP MENU
AUTO PROGRAM
ADD/DEL/BLNK
CH. LABELS
CLOCK SET
CAPTIONS
ALARM
LANGUAGE
AUTO PROGRAM
The Auto Program feature automatically searches for all
available channels and marks them as ‘added’ so that
they may be accessed via the channel Up/Down key.
In the Auto Program screen:
•A message at the top displays “Auto Program” to
let the customer know that they have entered the
Auto Program feature.
•A line at the bottom of the screen shows that the
Up/Down and Left/Right Arrow keys are used for
Auto Program selections.
•The current RF input type (Off Air Antenna or Cable
TV) is highlighted. Use the Up/Down Arrow keys to
change the RF input type.
To start the Auto Program, press the Left/Right Arrow
key. If the Cable TV input type is selected, the Auto
Program routine will determine what type of cable system
is present.
Notes:
•Auto program clears all blanked channels, which were
added.
•While searching for channels, all keys except for the
Power key are disabled. This prevents an incomplete
Auto Program procedure.
•Running the Auto Program will clear the factory mode,
if it was active. This happens at the end of the Auto
Program.
•If the Auto Program line in the Setup Menu is ‘red’,
this indicates that the module did not pass one of
the test equipment’s tests.
TO PROGRAM
CHANNEL ADD/DEL/BLNK
After running the Auto Program, all channels found by
the Auto Program feature will be marked as ‘Added’.
However, some of these channels may be scrambled, or
undesired by the customer. The Channel Add/Del/Blnk
feature allows the customer to selectively mark any
channel as ‘Deleted’ or ‘Added’.
To change the status of a channel, press the Right/Left
Arrow key.
To change the channel while adding or deleting channels,
use the Channel Up/Down keys, or press the desired
channel digits followed by ‘Enter’. If Channel Up/Down
is pressed the next or previous channel, which was marked
‘Added’, will appear. If only one channel is present, to
change the channel the customer must use the digit
keypad to select a channel.
CH. LABEL
This feature allows the customer to select a channel label
for the current station. This channel label is displayed
in the Channel/Time display. Initially, all channel labels
are set to ‘——‘ (which means that auto label is selected).
To change the current channel label, press the Left or
Right Arrow key.
To change the channel while adjusting channel labels,
use the Channel Up/Down Arrow keys, or press the desired
channel digits, followed by ‘Enter’. (If Channel Up/Down
is pressed, the next or previous channel that was marked
‘Added’ will appear.)
Selecting the "- - - -" label option means
that auto label is selected. Selecting the
"None" option means the channel will not
have a label.
If no channels are found then the following message
will appear: “Make sure that the cable/ant. is connected
and try again.”
SR23 - 923-035091-11CS - MENUS
USER MENUS 905-10533
Notes:
•When the “- - - -” label is selected, then the Auto
channel label is activated, in other words, the program
automatically takes the channel label of the signal
that is sent by broadcasting through the XDS service.
•If the label None is selected, the Auto channel label
is not activated.
PROGRAMMABLE CHANNEL LABELS
Besides the labels already provided, the customer may
select a label of his or her choice. The programmable
labels are at the end of the list of labels already provided.
Pressing the volume key allows the editing of the first
character. In this case it is the “L” that would start
blinking. However, if the Left volume key is pressed, the
“1” is the character that would begin to blink. When the
character begins to blink, the customer may select
another character.
The method of selecting another character is by pressing
the channel Up/Down key. If the channel up key were
pressed, the character displayed would be an “M”. On
the other hand, if the channel down key is pressed, the
character displayed is an “L”.
There are 20 programmable labels that the customer may
program. The available characters to choose from are
the following:
•Any changes done to a label are stored even if another
keystroke occurs. For example if the customer is
programming a label and the first 3 letters are entered
and accidentally the ENTER key is pressed or the Menu
key is pressed, the label is stored with only the three
characters being changed. The other two remain
unchanged. The programmable labels have 5
characters that may be programmed.
•If, for example, the 10th label is programmed as ABCDE,
then the customer decides to clear it. The channel
automatically receives the label NONE and label 10 is
restored to LAB10.
•Using the Channel Up/Down the customer may select
the above-mentioned characters.
CLOCK SET
This Setup Menu Line allows the customer to set the
clock time and date.
When no time is set, the display shows: - -: - There are two ways to set the time:
1. Direct Entry is preferred. Use the digit keys, followed
by ‘Enter’ or Select Up/Down.
2. Left/Right Arrow keys.
When the first digit is introduced, the display shows:
0:0d AM
When the time is set, the display shows:
hh:mm AM
where d = digit, mm = minutes, and hh = hours.
To select either AM or PM, the Timer key must be used.
Pressing the Timer key, toggles AM and PM to allow the
customer to select AM or PM.
Notes:
•Entering the time in 24 hour (Military) format is
allowed. AM/PM will be toggled automatically.
•Entering an invalid time (“0” for example) will result
in the clearing of the current time - - : - -.
•When only one digit is pressed and no other is pressed
in an interval of seven seconds, the current time will
be cleared.
CAPTION
This function allows the user to show in the screen the
configuration menu to captions.
Notes:
•If the mute key is pressed, the label is cleared. The
channel is automatically given the label NONE.
SR23 - 923-035091-12CS - MENUS
USER MENUS 905-10533
BRIGHTNESS
COLOR
TINT
VIDEO MENU
CONTRAST
PICTURE PREFPRESET
SHARPNESS
ALARM
If the factory menu item Alarm is set to 1 the Alarm
feature is activated.
SETUP MENU
AUTO PROGRAM
ADD/DEL/BLNK
CH. LABEL
CLOCK SET
CAPTIONS
ALARM
LANGUAGE
TO SET ALARM
LANGUAGE
This feature allows the customer to change the menu
language from English, Spanish, or French by pressing
the Left/Right Arrow keys.
AUDIO MENU
All options in the Audio Menu are selected with the Up
Arrow key. Once the option is selected, use the Left/Right
Arrow keys to adjust to option to the desired setting.
AUDIO MENU
BASS
TREBLE
BALANCE
AUDIO MODE
SOUNDRITE
FRONT SURR
SPEAKERS
AUDIO PREF
STEREO
OFF
ON
ON
PRESET
If 2nd Audio/SAP is selected, but the current channel
does not support SAP, then either Stereo or Mono will be
heard.
SOUNDRITE
The SoundRite feature is used to obtain a uniform volume
level, particularly while changing channels. The SoundRite
feature can be best demonstrated on a channel with no
signal (snow).
FRONT SURROUND
Front Surround sound can be set to ‘ON’ or ‘OFF’, regardless
of the current Audio Mode setting. However, the surround
effect can only be heard when the Audio Mode has been
set to ‘Stereo’ and a Stereo signal is present. When this
condition exists, there will be a short mute (200ms)
while toggling the Surround ‘On’ to ‘Off’, to embellish
front surround activation.
SPEAKERS
The Speaker feature is used to turn the internal speakers
on or off. It does this by pulling the power amp mute
line.
AUDIO PREF
This feature allows the customer to maintain two separate
audio settings by selecting “custom” or “preset”. The
Factory gets the “Preset” setting and the customer sets
“custom”. The PRESET and CUSTOM settings are selected
using the Left/Right arrow keys.
VIDEO MENU
All menu items are adjusted with the Left/Right Arrow
keys. Each option of the Video Menu is shown below:
BASS
Bass adjustment has 15 steps (0 to 14). A center mark
indicates step 7.
TREBLE
Treble adjustment has 15 steps (0 to 14). A center mark
indicates step 7.
BALANCE
Balance adjustment has 29 steps (0 to 28). A center
mark indicates step 14.
AUDIO MODE
There are three audio modes available: Mono, Stereo, 2
Audio/SAP.
SR23 - 923-035091-13CS - MENUS
CONTRAST
Contrast adjustment has 64 steps (0 to 63).
BRIGHTNESS
Adjusts the brightness of the picture.
nd
USER MENUS 905-10533
COLOR
Color adjustment also has 64 steps (0 to 63).
TINT
Tint Adjustment has 64 steps (0 to 63). A center mark
indicates step 29.
SHARPNESS
Sharpness adjustment has 64 steps (0 to 63). The
sharpness value is sent to the video processor as Custom
Sharpness.
PICTURE PREF
This feature allows the customer to maintain two separate
Contrast, Brightness, Color, Tint, Sharpness setting
“Custom” and “Preset”. The factory sets the “Preset”
setting and the customer sets “Custom”. The PRESET and
CUSTOM settings are selected using the Left/Right Arrow
keys.
PARENTAL CONTROL
The Parental Control Menu items are selected with the
Up/Down Arrow keys. Once the option is selected, use
the Left/Right Arrows keys to set each of the option.
Note: The Parental Control Menu is not available while
in computer mode.
AUXILIARY SOURCES
To block or unblock the sources, press the Left/Right
Arrow key.
PARENTAL CONTROL
Use the Left/Right Arrow keys to select the Age Block
Menu.
AGE MENU
GENERAL
CHILDREN
PRESS CC TO RETURN
UNBLOCKED
GENERAL BLOCK
Once entering into the Age Block Menu, the customer
has the option to block channels for general age or to
block channels for children.
To block channels for a general age, the customer may
either select: UNBLOCKED, TV-G AND ABOVE, TV-PG AND
ABOVE, TV-14 AND ABOVE or TV-MA.
CHILDREN BLOCK
To block channels for children, select either: Unblocked,
TV-Y AND ABOVE or TV-Y7.
CONTENT BLOCK
Use the Left/Right Arrow keys to select the Content Block
Menu.
AUX SOURCES
MPAA RATING
AGE BLOCK
CONTENT BLOCK
SET HOURS
SET PASSWORD
LOCK ON/OFF
Note:The SOURCE key may be used to view the video
BLOCKED
CONTENT BLOCK
DIALOG
LANGUAGE
SEX SCENES
VIOLENCE
F VIOLENCE
NO RATING
PRESS CC TO RETURN
UNBLOCK
source.
MPAA RATING
The MPAA selector allows the customer to select either
to have the channel Unblocked, G AND ABOVE, PG AND
ABOVE, PG-13 AND ABOVE, R AND ABOVE, NC-17 AND
DIALOG BLOCK
To block the dialog, use the Left/Right Arrow keys to
select either: Unblocked, TV-PG AND ABOVE or TV-14.
ABOVE, or X.
LANGUAGE BLOCK
AGE MENU
SR23 - 923-035091-14CS - MENUS
USER MENUS 905-10533
To block the dialog, use the Left/Right arrow keys to
select either: Unblocked, TV-PG AND ABOVE, TV-14 AND
ABOVE, or TV-MA.
SEX SCENES BLOCK
To block the Sex Scenes, use the Left/Right Arrow keys
to select either: Unblocked, TV-PG AND ABOVE, TV-14
AND ABOVE, or TV-MA.
VIOLENCE BLOCK
To block the Violence, use the Left/Right arrow keys to
select either: Unblocked, TV-PG AND ABOVE, TV-14 AND
ABOVE, or TV-MA.
F VIOLENCE BLOCK
To block the F Violence, use the Left/Right Arrow keys
to select either: Unblocked, TV-Y7.
NO RATING
To block No Rating, use the Left/Right Arrow keys to
select either: Unblocked and Blocked.
SET HOURS
Use the Left/Right Arrow keys to adjust the number of
hours the Parental Control feature will be active.
RE-ENTERING PARENTAL CONTROL MENU
If the Parental Control feature has been activated, the
software will not allow immediate entry into the Parental
Control Menu. Instead, it will prompt for the correct
password.
If the correct password is entered, the Parental Control
menu will appear, with the highlighted item “Lock On/
Off”, which assumes that the customer most likely wants
to turn the feature off. If an incorrect password is entered,
an error message (“Not Accepted!”) appears, and will
not disappear until 5 seconds has elapsed. This extended
time provision increases the amount of time necessary
for a child to “crack” the password.
RE-ENTERING PARENTAL CONTROL
PASSWORD?
ENTER CODE: __
SET PASSWORD
Press the Left/Right Arrow key to allow setting a
Password.
TO ENTER PASSWORD
The software accepts four-digit codes only. The customer
must enter a password.
REPEAT PASSWORD
After a four-digit code has been entered, the software
requires the customer to re-enter the same four-digit
code.
PASSWORD NOT ACCEPTED
If an invalid code is entered, or the two codes entered
do not match, an error message (“Not Accepted!”) will
appear blinking.
Note: This error message also appears when no code is
entered for the password or if only one digit is
entered and no other digit has been entered.
LOCK ON/OFF
This item turns the Parental Control feature on or off.
The Ctrl. feature can only be turned on if the hours > 0,
and a password has been set. Otherwise the Lock On/
Off line will display either of the following error
messages: “Must Set Hours” or “Must Set Password.”
Notes:
•The Parental Control menu will remain up for 15
seconds after the last key press.
•The QUIT key may be pressed to remove the Parental
Control menu if the actual channel source is blocked.
DISPLAY WHEN PARENTAL CONTROL IS ACTIVE
When the Parental Control is active and the channel is
blocked, the display on the screen shows two lines. The
first line displays a message saying that the “PARENTAL
LOCKOUT IS ACTIVE.” The second line displays the amount
of time (in hours) left in the lockout.
SR23 - 923-035091-15CS - MENUS
USER MENUS 905-10533
CH 4
3:35 PM
MONO
SOURCE
FRONT COMPUTER SVGA
Parental Lockout Is Active
01:23 Hours Remaining
SOURCE MENU
This option allows the user to select the source they
desire, which determines the signal that feeds the video
processor, the options are: ANTENNA/CABLE, AUX VIDEO
or VIDEO, CAMPORT, FRONT COMPUTER SVGA, REAR
COMPUTER SVGA, and REAR COMPUTER NTSC OUT.
Use the arrow keys and the ENTER key for signal switching.
SOURCE MENU
ANTENNA/CABLE
CAMPORT
AUX VIDEO
S-VIDEO
FRONT COMPUTER SVGA
REAR COMPUTER SVGA
REAR COMPUTER NTSC OUT
PRESSTO CHANGE.
PRESSOR <>KEYS TO ACTIVATE
ENTER
PRESS:
SOURCE TO CHANGE SOURCE
ENTER TO SELECT SOURCE
To select a Source, press the Source Key and source menu
appears (as shown below) showing the present source.
Pressing the Source key again, switches to the next source
but the input signal does not change. Once the desired
source is found, pressing the ENTER key selects that source
and changes the input. If ENTER is not pressed in
approximately 15 sec. The source menu turns off.
Note: If any one of the three computer sources is selected
and no computer is connected to the source, the
following screen will appear:
F COMP SVGA
1:51PM
STEREO
PLEASE CONNECT A COMPUTER
800 X 600, 60HZ
SOURCE MENU
ALTERNATE SOURCE MENU BY TV/SOURCE KEY
Same as source menu, but using the TV/SOURCE Key.
Note: CAMPORT (#33) and FRONT COMPUTER SVGA (#209)
are only available when the Auto-Sense feature
for either has been disabled in the Factory Menu.
SR23 - 923-035091-16CS - MENUS
MUTE
When the Mute key is pressed, the speakers will be turned
off.
MUTE WITH CHANNEL DISPLAY
When the mute key is pressed and the channel display
is on, the following display appears:
USER MENUS 905-10533
CH 4 HBO
3:35 PM
MUTED
MUTE WITHOUT CHANNEL DISPLAY
When the mute key is pressed and channel display is
off, the following display appears:
MUTED
CH 14 HBO
3:35 PM
MONO
FUNCTION NOT AVAILABLE DISPLAY
When the Time has not been set yet, and the customer
wants to enter the Alarm Menu, there will be an error
notification stating that the function is not available.
CHANNEL TIME DISPLAY
When the ENTER key is pressed the TV display will appear.
The following is an example of the display screen:
The first line is the channel and the label (if one has
been selected for the channel). The second line, displays
the time. The third line displays the Audio mode (Mono,
Stereo or SAP).
FUNCTION NOT AVAILABLE
PARENTAL CONTROL PASSWORD IS RESET DISPLAY
To reset parental control, press & hold the MENU key
until the Channel/Time display appears, then press ‘9’,
‘8’, ‘7’, ‘6’, and CC. The following menu appears after the
parental control is reset:
SR23 - 923-035091-17CS - MENUS
USER MENUS 905-10533
PARENTAL CTL PASSWORD IS RESET
DISCONNECT FRONT A/V JACKS DISPLAY
If the channel Up/Down keys are pressed and Auto
Camport in the Factory Menu (#33) has been enabled
and there is a device connected to the front Camport,
the following message appears:
keys. Same as the Video Menu for a RF signal.
This feature allows the customer to maintain two
separate Contrast, Brightness, Color, Tint, and Sharpness
settings “Custom” and “Preset”. The factory sets the
“Preset” setting and the customer sets “Custom”. The
PRESET and CUSTOM settings are selected using the Left/
Right Arrow keys.
PARENTAL CONTROL
(For Video Source Input)
The Parental Control Menu items are selected with the
Up/Down Arrow keys. Once the option is selected, use
the Left/Right Arrows keys to set each of the option.
Notes:
•This Parental Control is the same as the Parental
Control for the Ant/Cable source input.
•Also, There is no Parental Control Menu when the
input source is any of the Computer sources.
CAPTIONS SETUP
The caption setup items are selected with the UP/DOWN
arrow keys. Once the option is selected, use the Left/
Right arrows keys to set each option.
DISCONNECT FRONT A/V JACKS
VIDEO SOURCE INPUT
CUSTOM FEATURES
(For Video Source Input)
Same as Setup Menu for an RF signal.
AUDIO MENU
(For Video Source Input)
Same as Audio Menu for an RF signal, except auto mode
is not available.
VIDEO MENU
(For Video Source Input)
All menu items are adjusted with the Left/Right Arrow
CAPTION SETUP
OPER MODE
SEL CC TYPE
CC CAPTION
CC ON MUTE
CAPTION LOCK
PRESS ENTER TO CHOOSE
PRESS ADJTO CHANGE
QUICK/MUTE
Note: When the user selects the quick/mute operation,
if the cc key is pressed, the next message is
displayed.
OPERATION MODE
Toggle “between” quick/mute operation or standard
operation.
SELECT CC TYPE
In this option the user can select the type of captions
used. The caption types available are: caption1, caption
2, caption3, caption4, Text1, Text2, Text3, and Text4.
CC CAPTION
This option switches the caption selected in “select cc
type” ON or OFF.
CC ON MUTE
SR23 - 923-035091-18CS - MENUS
USER MENUS 905-10533
This option enables the captions when the TV is muted.
CAPTION LOCK
This option stores the caption configuration in EEPROM.
It also is used to remember the last configuration of
the captions.
COMPUTER SOURCE INPUT
AUDIO MENU
(For Computer Source Input)
Same as Audio Menu for a RF signal, except audio mode
is not available.
VIDEO MENU
(For Computer Source Input)
All menu items are adjusted with the Left/Right Arrow
keys. Each option of the Video Menu is shown below:
VIDEO MENU
CONTRAST
BRIGHTNESS
COLOR
TINT
SHARPNESS
PICTURE PREFPRESET
or 4 steps up from the value set in the Factory Item
153 GREEN DRIVE SVGA.
If this factory menu item is set at 30, the Green
adjustment in the Video Menu allows the Green Offset
to be set at –4 or +4 of the default value. Below is the
Menu item.
BLUE ADJUSTMENT
The Blue adjustment allows the customer to adjust
the Blue for Comp. SVGA or NTSC. To accomplish this
the Blue adjustment can be adjusted 4 steps down or
4 steps up from the value set in the Factory Item 155
BLUE DRIVE SVGA. If this factory menu item is set at
30, the Blue adjustment in the Video Menu allows the
Blue Offset to be set at –4 or +4 of the default value.
Below is the Menu item.
HORIZONTAL POSITION
The Horizontal Position adjustment has 64 steps (0 to
63). This Video Menu item allows the adjusting of the
Horizontal Position of the screen.
VERTICAL POSITION
This Video Menu item allows the adjusting of the Vertical
Position of the screen.
HORIZONTAL SIZE
The horizontal size adjustment allows customer to
adjust the Horizontal size for Comp. SVGA or NTSC.
Factory reference is 179.
CONTRAST
Contrast adjustment of the picture has 64 steps (0 to
63).
BRIGHTNESS
Adjusts the brightness of the picture.
RED ADJUSTMENT
The Red adjustment allows the customer to adjust the
Red for Comp. SVGA or NTSC. To accomplish this the
Red adjustment can be adjusted 4 steps down or 4
steps up from the value set in the Factory Item 153
RED DRIVE SVGA. If this factory menu item is set at
30, the Red adjustment in the Video Menu allows the
Red Offset to be set at –4 or +4 of the default value.
Below is the Menu item.
GREEN ADJUSTMENT
The Green adjustment allows the customer to adjust
the Green for Comp. SVGA or NTSC. To accomplish this
the Green adjustment can be adjusted 4 steps down
VERTICAL SIZE
The vertical size adjustment allows customer to adjust
the Vertical size for Comp. SVGA or NTSC. Factory
reference is 190.
PICTURE PREF
The Picture Preference allows the customer to adjust
all the items of the Video Menu or to select Preset
values.
REMOTE CONTROL FUNCTIONS
The customer has the option to use the remote control
to activate certain functions from the OSD.
Notes:
•Use a full screen computer display with high average
brightness for best results.
•Auto Size will adjust the computer image to match
the TV screen.
•The image cannot be zoomed in Freeze Mode.
As with the Remote Key Command Functions, menus
are operated through the Numbered Keypad. Generally
speaking, keys 4 and 6 adjust menu options, key 8
cycles through menus and key 5 cancels all operations
no matter what menu is being are adjusting.
SR23 - 923-035091-19CS - MENUS
USER MENUS 905-10533
G
G
s
Remote Functions
KEY NORMAL MODEMENU MODEZOOM MODE
1 Enter Zoom Mode N/ACancel Zoom Mode
2N/AN/APan Up
3 Compress On/Off N/ACompress On/Off
4 N/AMenu AdjustPan Left
5 Enter Menu Mode Cancel Menu Mod e Enter Menu Mode
6 N/AMenu AdjustPan Right
7 Begin Auto-SizeN/ABegin Auto-Size
8 N/AMenu SelectPan Down
9N/AN/AN/A
0 FreezeN/AFreeze
Remote Key Command Functions
Screen Size
8
6
Manual Set
8
6
Advanced
6
SETTING
Out h-Centre
Out H-Wid th
Out V-Centre
Out V-Height
VGA Left
VGA Width
VGA Top/4
VGA bottom/4
Sense Level
Clk Width
8
Limits of Settings
RANGE
65 to 85
80 to 120
107 to 232 for NTSC, 300 to 400 for SV
200 to 250 for NTSC, 480 to 600 for SV
0 to 20
30 to 81
0 to 40
70 to 260 (i.e. up to 200 *4 = 800line
1 to 3
0 to 3
Out H Centre
Adjust
8
6
4
4
VGA Left
Adjust
8
6
Out H Width
Adjust
4
VGA Bot
Adjust
4
Store Settings
VGA Width
6
8
6
8
6
8
4
Sense
4
Store Settings
Adjust
8
8
8
6
6
6
Clk Width
4
Out V Height
4
Vert Freq
8
Adjust
8
8
6
6
4
Rev #
8
VGA Top
Adjust
8
Eng. Reset
8
6
6
Out V Centre
Screen Size
4
VGA Lines
6
8
8
SR23 - 923-035091-20CS - MENUS
SECTION 2
SERVICE MENU
SERVICE MENU
Access the Installer’s Menu by using the remote control
or the keyboard on the front of the set. With the remote:
Press & Hold MENU key until the Channel/Time display
appears, then press 9, 8, 7, 6, and ENTER.
Press and hold MENU key until the Channel/Time display
appears. Simultaneously press the ADJUST Right and
CHANNEL Up keys. To exit Installer’s Menu, press ENTER.
Notes:
• When the factory mode is set to “1”, then
press ‘9’, ‘8’, ‘7’, and ‘6’, followed by
‘ENTER’ to access the Installer’s Menu.
• To reset parental control press & hold the MENU key until
the Channel/Time display appears, then press ‘9’, ‘8’,
‘7’, ‘6’, and CC .
00 F Mode: Use the Select key to select item #00, which
is the first item in the Installer’s Menu. The Factory
Mode item should always be left off (Zero is off). When
left in this mode, only items from 0 to 27 are visible.
When the factory mode is set to 1, all menu (Audio or
Video settings) items will be available. Also they will
appear on the screen one at a time at the top left of
the screen.
When The Factory Mode is on, the Factory Menu line
appears at the top of the screen to allow for proper
setting of the video.
1391 - P0701.4402
Microcontroller
part number
4 VERT POS 15
SN : 0121-41362000
UPN : 065-054-032-000
01/29/02TE=10110000
Build Date
Program
Revision
Factory Option
When the Factory Mode is turned off, all TV functions
are returned to normal. The dashes on the menus are
removed indicating that the Factory Mode is off. There
are 4 ways to turn off the Factory Mode:
Font
Revision
Te Status
AC power.
• Auto off enabled: The Auto Off feature is always enabled,
regardless of the state of the “Auto OFF” Factory Menu
item.
• Settings Displayed in Customer Menus: When adjusting a
bar graph setting in the Video and Audio Menus, a number
is displayed showing the actual numeric value stored in
EEPROM for that setting. On menu items without a bar
graph setting, two dashes indicate that the Factory Mode
is on.
• Video Preference Settings Inhibited: In the Video Menu,
the Custom Video Preference settings are inhibited while
the Factory Mode is on and will NOT be stored in EEPROM.
(This allows the factory to temporarily change the settings
and not store them permanently.)
01 Preset Px: Used to store the customer menu adjust-
ments in the nonvolatile memory of the EAROM. Settings for Contrast, Brightness, Color and Tint are stored
in this manner. 0 is Custom and 1 is Preset.
02 Preset Ax: Saves your custom audio settings (Bass,
table, balance, audio mode, Soundrite, front surround,
speaker) in nonvolatile memory (not affected by power
loss). Memory status is indicated by a 1 for “custom
settings already stored”, or 0 for “custom settings have
not been stored.”
03 Power Manage: Used for saving energy. When set to
0, Power Manage is off. The number represents the
hours that the TV will remain on, unless there has been
activity from either the control panel or remote.
04 Vert Pos: Moves Captions and displays vertically on
the screen. Use the ADJUST keys.
05 Horz Pos: Moves Captions and displays horizontally
on the screen. Use the ADJUST keys.
06 Band/Afc: There are 8 possible settings for this op-
tion.
1. Change Installer’s Menu Item “00 F Mode” to 0.
2. Run Auto Program.
3. Use the Clock Set feature to set the time.
4. Use Factory off IR code.
0 = Broadcast Fixed4 = Broadcast AFC
5 = CATV Fixed1 = CATV AFC
6 = HRC Fixed2 = HRC AFC
7 = ICC Fixed3 = ICC AFC
Notes:
• AC Power on Enabled: The ‘AC Power on’ feature is always
enabled, regardless of the state of the “AC on” Installer’s
Menu item. The set will automatically turn on when AC
power is applied. The POWER key will not turn the set
off. The only way to turn off the set is by removing the
07 Min Volume: Determines the minimum volume level
allowable with the VOLUME (VOL) Up/Down Control.
In this way, for example, someone cannot set the volume too low to hear. The factory default is 0, which
provides full range of volume control. It may be best
to set the same value on every TV.
SR23 - 923-035092-1CS - SERVICE MENUS
SERVICE MENU (continued)
Note: The minimum volume level cannot have a value setting
higher than in the MAX VOLUME level (described
below).
08 Max Volume: Determines the maximum volume level
allowable with the VOLUME (VOL) Up/Down Control.
In this way, for example, someone cannot set the volume level high enough to disturb others. The factory
default is 63, which provides full range of volume control. It may be best to set the same value on every TV.
Note: The maximum volume level cannot have a value setting
lower than in the MIN VOLUME level (described above).
09 AC on: Allows the TV to turn ON just by applying AC
power. Pressing the ON button is not necessary. This
is desirable when the TV is plugged into a cable box
or a power outlet controlled by a wall switch. Use adjust to select 0 or 1, where 0 is OFF and 1 is ON.
Note: When set to 1 (ON), the TV does not respond to ON/
OFF commands from either the remote or the control
panel, and the SLEEP TIMER is also nonfunctional.
10 Key Defeat: When set to 1, it prevents the end user
from accessing screen menus on the front panel keys,
SELECT and ADJUST do not function. When set to 0,
those keys are functional. The menus can always be
accessed with MENU on the remote.
11 Strt Ch: When active, this function allows you to set
the initial volume level setting and channel number
when the TV is turned ON. This feature is useful for an
in-house information channel, since the TV would always select that channel when it is turned on. When
inactive, the volume level and channel retain the settings when the set was last used.
The range of values is 0-255. Use the ADJUST keys to
choose. With number 255 the feature is inactive. Other
numbers determine the start channel. Set the volume
level as desired before exiting the service menu. 0 is
the “AUX” channel.
Generally, this feature is used in connection with START
CHAN/VOL where the start channel may, for example,
be set to 3 or 4. If the start channel is 3 then the TV
will remain on channel 3.
15 Ghost Ch: When set to 1, the current channel number
is displayed in the upper right corner of the CRT. The
number moves slightly to prevent damage to the
screen. The default is “0” or OFF. When captions are
on, the “ghost” channel is not displayed.
16 Not Used
17 Text Mode: Determines whether TEXT 1 and TEXT 2
decoding is enabled when CAPTIONS are turned on (either from the Setup Menu or directly with CC on remote). When set to 1, only Caption 1, 2, 3, and 4 are
enabled. When set to 2, Caption 1, 2, 3, and 4 and
Text 1, 2, 3, and 4 are enabled.
18 Sleep Timer: When set to 1, a end-user may set the
SLEEP TIMER feature (but no message is displayed prior
to turnoff). When set to 0, the sleep timer is not available.
19 Alarm: Gives you the option of making the alarm func-
tion available to the end-user. Set to 1, alarm function is available. Set to 0 to withhold this function.
20 Ch. Over Ride: When set to 1, the user is allowed to
select channels with either Channel Up/Down or by
direct keypad entry. When set to 0, only those channels that are entered for scanning may be selected.
21 Old Ocv: Set to 1 for operation with “SpectraMate”
systems from on command corporation.
22 Caption Lock: Set to 1 to restore previous caption
on/off state after the TV turns off when set to 0, captions are always off when TV is initially turned on.
23 Function Pre: Set to 1 to suppress channel prev screen
and enable user function menu with some pay per view
systems.
12 Strt Vol: When active, this fuction allows you to de-
termine the initial volume level setting when the TV is
turned on. This feature is useful for an in-house information volume, since the TV would always select that
volume when is turned on. When inactive, the volume
level retain the settings when the set was last used.
13 Not Used
14 Chan Lock: When set to 1 the CHAN LOCK is ideal if a
cable box (or similar) is the sole source for programming and the TV must always be on the same channel.
Changing channels with the Channel Up/Down or keypad numbers is impossible. Channel Lock is inactive
when set to 0 (default).
SR23 - 923-035092-2CS - SERVICE MENUS
24 Feature Level: Set to 1 to see Zenith Code, when set
to 0 Private Codes are shown.
25 NTSC ScanCard: Set to 1 to instate TV ONE card in
NTSC mode.
26 Not Used
27 Mute disable: This function disable the mute opera-
tion in the TV. Also applies for MPI operation.
28 V-Chip: Enable/Disable the V-CHIP.
29 Max Block Hrs: Enable the V-CHIP maximum block
time.
30 Strt Aux Srce: Enable the initial AUX when is ac-
cessed with Up/Down key or 999.
SERVICE MENU (continued)
FACTORY MENU ITEMS
31 Mute time: Time during the TV stays in blank state
when Real Time= Mute Time * lbms the switching is
between sources.
32 Y/C Loop out: Enable/Disable the Y/C out of the rear
Jack Pack.
33 Auto Camport: Enable/Disable the Camport Auto De-
tect.
34 Not Used
35 A Att: Adjust the signal level input to COMPIN (Pin
19) to the standard input level. Variable range of the
input signal: 245 mVrms –5.0 dB to +3.0 dB. 0 = Level
min. and 15 = Level max.
36 A Vco: Adjust STEREO & SAP VCO free running fre-
quency (fo). Variable range: fo ±20%. 0 = Free running frequency min, 63 = Free running frequency max.
37A Filter: Adjust the filter fo of the ST, SAP and dbx
blocks. Variable range: fo ±20% 0 = Frequency min,
63 = Frequency max.
38 A Spectral: Perform high frequency (fs= 3 kHz) sepa-
ration adjustment. 0 = Level max, 63 = Level min.
39 Wide Band: Perform low frequency (fs= 300 Hz) sepa-
ration adjustment. 0 = Level min, 63 = Level max.
NTSC IC 221-1377 FROM 40 TO 61
40 Hue: Hue Control. Range: 0-63, 0 = Flesh color ap-
pears red, 63 = Flesh color appears green.
41 Dpic off: Y black expansion ON/OFF switch. Range: 0-
61 Delay: Allows the following delay times to be added
to the Y signal. Range 0-3, 0 = 0nS, 1 = 60nS 2 =
120nS, 3 = 180nS.
NTSC IC 221-1376 FROM 62 TO 111
62 Akb-T: Selection of timing pulse, which generates
reference pulse (Set to NORMAL mode at power on).
Range 0-1, 0 = NORMAL mode (reference pulse generated by SCP input only), 1 = V compression mode (reference pulse generated from VTIM-IN,HP-IN).
63 Blksw: Selection of H, V blanking system for RGB-OUT
(Set to 0 at power on). Range: 0-1, 0 = Normal blanking mode (blanking up to VCE(sat) level, 1 = Blanking
at value set by BLK-BOTTOM (Refer to the description
of the BLK-BOTTOM register).
64 Mat-Out: Selection of type matrix conversion; selected
signal is output from pins 76,77 and 78. A DC voltage
of approximately 4V is output only for 3 of these
modes. Range 0-3, 0 = THROUGH1 (when YCbCr is input, normal NTSC input), 1 = Matrix of YPbPr to YCbCr
signal, 2 = Matrix conversion of GBR to YCbCr signal, 3
= THROUGH2 (GBR is input directly to internal RGB
system, SVGA input).
SR23 - 923-035092-3CS - SERVICE MENUS
SERVICE MENU (continued)
65 Ycbcr/MAT: Selection of IN1 system signal or SELIN
system signal for signal sent to Y color difference processing system. H and V sync signals are simultaneously
selected and output. Range: 0-1, 0 = IN1 system input selected, 1 = SELIN system input selected.
66 Hysw: Switch for switching signal output to YG-OUT
pin. Range: 0-1, 0 = For a sync on Y, sync on Green
input, 1 = For a composite sync input.
67 Limit-Level: Limiter to cope with excessive high in-
68 System: Signal frequency band switching; select the
band in accordance with the TV System. Range: 0-3, 0
= NORMAL, 1 = FF, 2 = HD, 3 = FIX-HD (setting which
gives greater importance to frequency response than
2).
69 Agin1: White output aging mode ON/OFF switch, 83
IRE flat signal is output from Y system. Range: 0-1, 0
= OFF, 1 = ON.
70 Agin2: All black output aging mode ON/OFF switch
Input signals are cut off inside the Y/color difference
signal processing system. As a result, the signals which
were input to the RGB system are output. Range: 0-1,
0 = OFF, 1 = ON.
71 Ysym1sw: ON/OFF switching for YS/YM1 input pin
(pin 45). Range: 0-1, 0 = ON, 1 = OFF.
72 Ym-Vm: Mute function ON/OFF switch for VM-OUT (pin
59) in YM ON block. Setting takes effect for both YS/
YM1 (pin 45) and YS/YM-2 (pin 49). Range: 0-1, 0 =
OFF : no muting, 1 = ON : muting.
73 R-Drive: R channel drive gain control. Range: 0-63, 0
= -4.2 dB, 29H = 0 dB, 3FH = +2.1 dB.
74 G-Drive: G channel drive gain control. Range: 0-63, 0
= -4.2 dB, 41 = 0 dB, 6.3 = +2.1 dB.
75 B-Drive: B channel drive gain control. Range: 0-63, 0
= -4.2 dB, 41 = 0 dB, 6.3 = +2.1 dB.
76 D-Col: Dynamic color ON/OFF switch. Range: 0 = OFF,
1 = ON.
77 Clpsw: Switch for selecting replacement pulse for color
difference input pin offset control. Range 0-1, 0 =
Pulse generated inside IC (replaced in period extending from rise of pulse which is input to HP-IN to the
fall of pulse in 1), 1 = Clamping pulse which has been
separated from SCP.
78 Clp-Msk: Switching of clamping pulse width in vari-
ous ways (refer to description of H-WIDTH register)
Gating at one of the SCP CLP pulses widths listed below. Range: 0-3, 0 = CLP, in its original form, serves as
clamping pulse, 1 = Gating at SELH-OUT side of register H-WIDTH, 2 = Gating at clamping pulse generation
block side of register H-WIDTH, 3 = Prohibited.
79 R-Cutoff: R channel cutoff control (Level control of
tings for output DC bias out RGB OUT . 0 = -13IRE, 31
= CENTER, 63 = +13IRE.
85 Hsep-Sel: Sync separation system setting (valid for
YG-IN (pin 26) input). Range: 0-1, 0 = Forced slice at
sync tip +0.15V level, 1 = Charging/discharging for
duty cycle.
86 Fix-Sync: Switch for setting sync identification cir-
cuit operation mode to auto or fixed. Range 0-3, 0 =
Automatic identification ( with priority sequence ), 1
= Independent H, V sync signals used, 2 = Composite
sync input used, 3 = Sync on Y, sync on Green inout
used.
87 V-Tc: Setting for V sync separation time constant.
Range: 0-3, 0 = 6 s, 1 = 8 s, 2 = 12 s, 3 = 18 s.
88 H-Width: Setting of output pulse width to HS-OUT
and clamping pulse generation block. When the pulse
width of the input sync signal is wider than the pulse
width in each data, the wider of the two pulses is
output. Range: 0-3.
89 Hs-Mask: Setting for whether H sync is to be added
in V sync at HS-OUT (pin 29) and SELH-OUT (pin 79).
Range: 0-1, 0 = Not added, 1 = Added.
SR23 - 923-035092-4CS - SERVICE MENUS
SERVICE MENU (continued)
90 Cr offset1: For canceling the offset between CrCb of
IN1 and SELIN systems. Range: 0-15, 0 = -10 mV, 7 =
0 mV, 15 = +12 mV. This variable range is DC variation
amount of respective input pins.
91 Cb offset1: For canceling the offset between CrCb of
IN1 and SELIN systems. Range: 0-15, 0 = -10 mV, 7 =
0 mV, 15 = +12 mV. This variable range is DC variation
amount of respective input pins.
92 Cr offset2: For canceling the offset between CrCb of
IN1 and EXT systems. Range: 0-15, 0 = -10 mV, 7 = 0
mV, 15 = +12 mV. This variable range is DC variation
amount of respective input pins.
SELH-OUTClamping Pulse Generation Block
0 = THROUGH0 = 1.4 us
1 = 1.4 us1 = 1.4 us
2 = 1.7 us2 = 1.7 us
3 = 3.7 us3 = 3.7 us
93 Cb offset2: For canceling the offset between CrCb of
IN1 and EXT systems. Range: 0-15, 0 = -10 mV, 7 = 0
mV, 15 = +12 mV. This variable range is DC variation
amount of respective input pins.
94 Sub-Con: Contrast gain control (Y system level ad-
102 Lrgb2-Level: LRGB2 system picture level control.
Range: 0-15, 0 = -5 dB, 15 = 0 dB.
103 Gamma: Control of gamma correction amount. 0 =
OFF. 15 = MAX (output increased by 15 IRE at input
40 IRE point).
104 Pabl-Level: Setting of level detection DC at RGB-
OUT of PEAK-ABL. 0 = Level detection DC : 4.9 V. 15 =
Level detection DC : 6.8 V.
105 Blk-Bottom: RGB-OUT bottom limiter level control
(valid when BLKSW = 1). The limiter level is replaced
with the reference DC for each H in RGB system, and it
is defined by the drop voltage from that DC; it is not
dependent on DC level control setting made by BRIGHT,
etc. This limiter functions for all video signals. For
further details, refer to the description of operation.
Range: 0-15, 0 = Limiter level: -1.25 V, 15 = Limiter
level: -0.65 V.
106 Sub-Shp: Sharpness center control (when SYSTEM =
CV-1
L1-IN
R1-IN
L2-IN
R2-IN
Y1-IN
C1-IN
L3-IN
R3-IN
Y MON OUT
C MON OUT
VM-OUT L
VM-OUT R
RESET
R
G
B
HS
VS
CV SEN
CV IN
Y IN
C IN
C OUT
Y OUT
R
G
B
HS
VS
CV RF
Y INS1
Y IN1
C INS1
C IN1
V OUT
SCL
S
D
A
S
C
L
BGF
B
SDA
COMB FILTER
BPF
BPS
C OUT
Y OUT
220V
12V
G2
FOCUS
R G B
A
K
B
V
M
Y
UVHSV
S
SCP
V TIM IN
V OUT
H OUT
H FBP
EW-DR
H FBP
H DR
ABL
V DR+
V DR-
VPROT
F0
H PROT
ABL FIL
SDA
SCL
C IN
Y IN
SCL
HS
VS
SDA
9V
IC6000
221-01391-P07
ICX2200
221-01376
ICX2600
221-01378
Video Ouput Board
TV
One
Card
Front
Jack
Pack
Rear
Jack
Pack
ICX2201
221-01377
To Large
Signal Module
ICX2900
Video Circuit
6V
FIL
R
SECTION 3
CIRCUIT OVERVIEW
CIRCUIT OVERVIEW
CHASSIS OVERVIEW
CONNECTIONS
This chassis has two means of A/V connectivity, one
jackpack in the front and one in the back. The rear
jackpack accommodates composite video, Y/C (super
video), RGB Computer, and TV RF inputs. The front
jackpack has only composite video and RGB computer
inputs.
SIGNALS
Two types of signals, NTSC and SVGA, are processed in
the set. NTSC signals enter by four inputs.
•CV RF: The IF section sends the composite
video to the A/V switch (ICX2900) at pin 53
(VinE4).
•CV-1: Fed from the rear jackpack to the A/V
switch at input pin 7 (VinS1).
•CV-4: This input, called Camport, is fed to the
A/V switch via pin 5 (VinE1).
•Y1-IN: This is the luminance input of the Y/C
(super video) connector and is fed to the A/V
switch through pin 15 (YinS2).
•C1-IN: This is the Chroma part of the Y/C (super
video) connector and is fed to the A/V switch
through pin 17 (CinS2).
All of these signals must be input to the A/V switch
with a 1 Volt Peak-to-Peak (Vp-p) level. The
microprocessor selects the signal through the I2C bus.
If the signal is composite video, it is sent to the comb
filter to separate the luminance and chroma components.
The luminance signal is fed back to the A/V switch at
pins 9 (YinS1) and 48 (Yin1). The chroma signal is sent
to a pair of band-pass filters, one for the composite
video inputs and one for the COMPOSITE VIDEO RF
(because the two signals have different levels). Then
the chroma is fed back to the A/V switch via pins 11
(CinS1) and 40 (Cin1).
The correct signal is selected by the microprocessor
and the A/V switch sends it to pins 44 (Yout1) and 42
(Cout1) and to ICX2201.
SR23 - 923-035093-1CS - SERVICING
CIRCUIT OVERVIEW (continued)
INTEGRATED CIRCUITS
ICX2201 is a chroma decoder. It receives luminance and
chroma signals and decodes them to YUV video with
synchrony. The diagram shows the connections of the
luminance signal to the synchrony inputs. This is
because the chip extracts the horizontal and vertical
sync pulses from the luminance composite sync.
The YUV video and sync from the ICX2201 are fed to
the ICX2200 at pins 5 (IN2-3), 4 (IN2-2), 3 (IN2-1), 1
(IN2-H), and 2 (IN2-V).
The ICX2200 is an RGB video processor and switch that
supports multi-scan capabilities. This switch has four
inputs:
•IN2 (pins 1-5): This input is used for the YUV
video from ICX2201. It is selected by the
microprocessor whenever the set is in NTSC
mode by setting the input-SEL register to 0.
•IN3 (pins 7-11): This input is connected to
the rear jackpack through connector 8VGA2.
When this input is selected the microprocessor
sets the input-SEL register to 1.
•IN4 (pins 13-17): This input is connected to
the front jackpack connector 6F1 located in
front of the set. The microprocessor selects it
by setting the input-SEL register to 2.
•IN5 (pins 19-23): Not used.
The output of the ICX2200 is three lines of video (RGB)
and two lines of sync (HV). The RGB lines are connected
to the video output board and the Sync (HV) lines are
connected to the input of ICX2600.
The video output board gets the RGB output from the
ICX2200 to drive the CRT. It also returns a signal (IK –
Cathode current) to pin 41 (IK-IN) of ICX2200. This is
used to control the correct black level of the three
amplifiers (AKB circuit).
ICX2600 is a deflection processor and compensation
circuit for multi-scan signals. This IC accepts the output
sync from ICX2200 and generates the signals needed
for the large signal deflection board. Since CS Chassis
sets use only two formats (NTSC using 15KHz at 60Hz,
and 37.9KHz at 60Hz), the IC uses point scan mode
and all other frequencies are set as invalid.
ICX2600 generates signals:
•Horizontal drive (H-DRV), East-West correction
(EW), and positive and negative Vertical ramps
(+VDRIVE, -VDRIVE) used in the horizontal and
vertical deflection circuit.
•Vertical Parabola (VPARAB) and Horizontal
Sawtooth (Hsaw) are both used in the dynamic
focus circuit.
•Two signals, F0 and FH_STATUS, use the
deflection circuit to switch the frequency of
the deflection circuit between 15KHz and
37.9KHz.
•The sandcastle pulse (SCP) and Vertical timing
pulse (VTIM) are fed back to the ICX2200. This
is used as a reference for the internal blanking
circuit and the AKB timing generator.
And accepts from the deflection circuit:
•The fly back pulse (H-FBP) is used for
synchronizing the deflection with the H-DRV
pulse generated in the IC.
•H-PROT signal is used in shutdown protection.
•V-PROT is used to protect the CRT.
•The ABL signal is used by the ICX2200 and
ICX2600 to regulate the size of the vertical
and horizontal size and the current of electronic
beam.
VIDEO PROCESSING
COMB FILTER
The function of the Glass Comb Filter is to separate the
composite video signal into Luminance (Y) and
Chrominance (C) signals with a minimum amount of Cross
Luminance and Cross Chrominance. The Glass Comb Filter
is a hybrid integrated circuit together with a glass delay
line combined into a five-pin package. The filter converts
the composite signal to an acoustic signal using a
piezoelectric transducer. The acoustic signal is sent
through the glass delay line where it is delayed by one
horizontal scan line. It is then converted back to an
electrical signal. This is called 1H delay, which
corresponds to one horizontal scan line time period.
Hence the name 1H COMB. This current undelayed line
is summed with the delayed line to give Y_COMB and
subtracted from the delayed line to give C_COMB. This
is made possible by the interleaving of Luminance and
Chrominance signals during one horizontal scan line.
The glass comb filter receives composite video from
ICX2900 pin 36 (Vout2) and separates it into Luma (Y)
and Chroma (C) signals. The Luma (Y) signal passes
through a 3.58MHz Trap in order to eliminate the
residual signal of Chrominance, and then is sent back
to pin 9 (YinS1) and pin 48 (Yin1) input with different
levels (because the levels of the signals are different to
RF and CV). The Chroma (C) signal goes to two different
3.58MHz Band Pass Filters decoupled by an emitter
follower (one for RF and the other for CV) in order to
eliminate the Luminance signal from the chroma signal
of each input. Then it is sent to pins 11 (CinS1) and
40 (Cin1) inputs of ICX2900.
SR23 - 923-035093-2CS - SERVICING
CIRCUIT OVERVIEW (continued)
J2402
91-2053
R2936M
100
C2408M
1000pF 50V
L2402
6.8uH
C2409M
62pF
50V
C2407
10pF
50V
C2410M
220pF
50V
R2410M
0
R2415M
470
R2413M
470
R2414M
100
Q2902
121-1310A
C
E
B
+9
VSW
+9
VSW
Q2401
121-1310A
C
E
B
R2412M
150
R2411M
470
R2409M
470
C-COMB
J2403
91-2053
C2406M
1000pF
50V
C2405M
62pF
50V
L2400
6.8uH
C2404M
220pF
50V
R2407M
150
DL2400
223-45
J2401
91-2053
R2405M
47
R2402M
1K
+9
VSW
R2401M
0
C2401M
10uF
50V
Q2400
121-1311A
E
C
B
+9
VSW
L2403
100uH
R2404M
10K
R2403M
22K
C2403M
220pF
50V
L2401
10uH
R2406M
47
C2937M
0.01uF
25V
C2402
47uF
16V
3
2
5
1
4
Yin
YinS1
CinS1
Vout
Cin1
COMB-FILTER CIRCUIT
R2405M
47
C2403M
220pF
50V
L2401
10uH
R2406M
47
R2414M
100
From Comb filter
To AV Switch
3.58MHZ TRAP
C2408M
1000pF
50V
L2402
6.8uH
C2409M
62pF
50V
C2410M
220pF
50V
From Comb filter
To AV Switch
BAND PASS FILTER
GREEN VO
AMPLIFIER
RED VO
AMPLIFIER
BLUE VO
AMPLIFIER
GREEN
PREDRIVER
RED
PREDRIVER
BLUE
PREDRIVER
VIDEO
PROCESSOR
CRT
VIDEO OUPUT BOARD
AKB SENSE
VIDEO OUTPUT BOARD
The signal is first uncoupled at the output of the video
processor. Three transistors in the emitter follower
configuration do this. Then the signal is amplified to
the levels required for a good image on the CRT by the
Video output board. On each amplifier there is a
dedicated section for sensing the cathode current for
the AKB system.
3.58 MHZ TRAP
The Chrominance information is 3.58 MHz and has a 1MHz bandwidth (BW). Since the video processor requires
that Luminance and Chrominance be separated, it is
necessary to use a filter to eliminate signals in that
frequency range. In this circuit R2414M adjusts BW,
R2406M adjusts attenuation and BW, L2401 and C2403M
adjust BW and resonance frequency.
CRT/VIDEO MODULE
The Video Output Amplifier circuitry is divided into 4
sections. One section is the support circuitry for the
CRT (G2 circuit, for example). The other sections are
RGB amplifiers (one for each color signal). The locations
for all the components are numbered according to these
four sections. x510x references components in CRT
support circuitry, x520x components are the Red
section, x514x components are the Green section, and
x516x components are the Blue section. So, for example,
BAND PASS FILTER
To obtain the chroma information from a composite
video signal a BPF is used. The theory says that the
filter is centered at 3.58 MHz with 1MHz bandwidth.
Each component on a filter can affect the appearance
of the image. The next circuit shown is the band pass
circuit.
SR23 - 923-035093-3CS - SERVICING
resistor R5125 in the Red section has the same function
as R5145 in the Green section and R5165 in the blue
section. For the purpose of analysis, the explanation
below is based on the Red section.
The principal part of the Red amplifier is IC5121. This
IC is an operational amplifier, configured as an inverting
amplifier. The inverting input is on pin 2 and the noninverting input is on pin 4. The Feedback resistor is
R5125. It has a gain peaking network between pin 1
and pin 3. This network is internally connected to the
collectors of the differential input transistors.
CIRCUIT OVERVIEW (continued)
+12
VDC
R5101
6.8K
R5102
2.4K
VB
C5122
47uF
50V
C5121M
15pF
50V
C5124
0.047pF
50V
C5123M
0.01uF
50V
R5122M
1K
R5123M
820
C5132M
0.01uF
50V
R5125
27K
3W
R5169
47
1 RC-
2 VIN
3 RC+
4 VB
5 IN
6 12V
7 IK
8 GND
9 NC
10 200V
11 NC
12 OUT0
13 OUT
C5125
0.22MFD
250V
+220
VDC
R5126
47K
1/2W
TDA6120Q
IC5121
F-53938
221-01404 126-03390-08
R5128
470
1/2W
C5126
560pF
500V
Q5121
121-01356A
B
E
C
L5121
0
D5108
103-00415-02A
+220
VDC
Video Output Amp (Red)
13
12
I/U
OUT
OUT
CI int
IDC
4.5mA
5
Vin -
Vin +
Rf
CI ext
2
4
TDA6120Q
U/I
RC-
RC+
1
3
Ci
Ri
Video Output Amp IC
The input signal is connected to the inverting input of
the amplifier through resistor R5121 to avoid Hi
frequency oscillations. The non-inverting input is
connected to a voltage bias formed by resistors R5101
and R5102.
The C5122 is for AC decoupling and C5123 is for Hi
Frequency filter purposes (one for each IC). The IC takes
this voltage bias as a reference voltage for the input
signal. Therefore, by means of moving this reference
voltage, the black level is established. The reference
voltage is the same for the three-color amplifiers.
The cathode output is from pin 12 of the IC. This signal
is passed through transistor Q5121 with the purpose
of sampling the cathode current. This cathode output
also uses resistors R5127, R5128, and the coil L5121
for peaking improvement.
VIDEO OUTPUT AMP IC
IC5121 consists of one monolithic video output
amplifier. It is called a transadmittance-transimpedance
amplifier because it can be split into two amplifier
stages in series. The first stage is a voltage to current
stage (transadmittance) and the second stage is a
current to voltage stage (transimpedance).
At the second stage voltage to current feedback is
applied by resistor (R5125) connected from out (pin
13) to in (pin 5). The transadmittance of the first stage
can be chosen by means of a resistor between pin 1
and pin 3, represented on this circuit by R5122.
The signal input is through a differential pair of
transistors. The signal is connected on pin 2 (Vin). The
input configuration consists of a bipolar NPN transistor
in a long tailed pair configuration. Input current is
30µA type.
Black current data pin (7) is not used. Instead of this
pin, the current is sensed externally by means of
transistor Q5121.
SR23 - 923-035093-4CS - SERVICING
Video output current is delivered by a quasicomplementary class A/B push-pull stage designed in
DMOS technology which can source and sink a current
of 100mA for video output voltages of 125Vp-p. A
feature of this output stage is the low saturation voltage
(typ. 4V) and the low voltage drop at high level (typ.
Vdd-6V).
Frequency response is improved by means of a capacitor
(C5121) in series with a resistor (R5123) connected
between pins 1 and 3 of the IC. The values of these
elements are a compromise between bandwidth,
overshoot, and ringing.
AKB OPERATION
The auto cut off system is intended for stabilization of
the black current and to compensate for CRT aging.
The video processor adds 3 pulses on the last portion
of the vertical blanking interval (one for each color).
The currents on the cathode for each pulse are sensed
and sent back to the video processor for correction.
Each pulse is actually a complete horizontal line with a
video level of approximately 8 Ire’s. These pulses are
slightly closing the vertical scan. They appear as a set
of 3 lines on the top of the image.
The Cathode current is sensed by a PNP transistor
(Q51X1). The three sensed currents are tied together
and send back to the video processor. On the main
board this current signal is converted to voltage and
sent to the video processor (pin 41 of ICX2200).
The video processor internally resolves the current level
of each color, compares it to its internal reference, and
makes an adjustment.
CIRCUIT OVERVIEW (continued)
TDA6120Q
MIRROR
CASCODE
CASCODE
1x
1x
CURRENT
INPUT
1x
IN
OUT
1xINOUT
4xOUT
MIRROR
4x
IN
OUT
J 5mA
1
3
4
8
6
9 11
5
10
12
13
7
2
+
0.7 pF
V
CC
V
DD
IN
OUTC
OUT
OUTM
GND
VIN+
RC+
RC-
VIN-
a.c.
AKB Circuit
IC1400
221-01127
ICX2900
221-01053
VIDEO/AUX
S-VIDEO
COMPUTE
REAR
(SVGA/NTSC)
COMPOSITE
VIDEO FRONT
TUNER/IF
COMPOSITE AUDIO
IC801
221-01145
Rear Jack Packs
Front Jack Packs
Antenna/Cable
A/V Switch
Audio Processor
Transistor Variable
Audio Output Monitor
MicroProcessor IIC Bus
R-IN
L-IN
R-IN
L-IN
R-IN
L-IN
R-IN
L-IN
ROUT T
LOUT T
AUX1-R
AUX2-L
LSOUT-R
LSOUT-L
Vol, Bass, Treble,
Balance, SoundRite,
SEQ
COMP-IN
R-IN
L-IN
SPKR-R
SPKR-L
AUX-R
AUX-L
SDA
SCL
SDA
SCL
PWR MUTE
10
8
16
14
22
20
6
4
39
40
2
5
6
7
3
9102627
11
7
41
39
To Rear Jack Pack
Stereo Module
The factory adjust of cut off is based on this system.
The processor moves the reference pulse according to
the level indicated on the cut off register. When the
reference pulse is moved, the AKB system moves the
black level of the signal. This is the way it adjusts the
white balance at low contrast.
ABL CIRCUIT
ABL (Automatic Blanking Level) and ACL (Automatic
Contrast Level) are circuits designed to protect the CRT
against over-current of electron beams that will burn
the screen phosphors. Both circuits limit the current
flowing to the screen. For 27-inch sets, the beam
current is limited to 1.5 mA. For 32 and 36-inch sets
the beam current is limited to 1.6 mA. The ABL controls
the current by affecting the black level and the ACL by
limiting the contrast.
The ICX2200 Video processor has two ABL modes of
operation: Picture only and Picture/Brightness. The first
one only affects the contrast level. This first mode is
also called ACL. The second option affects Contrast and
Brightness. This option is a mix of ABL and ACL. Both
options are selected by software. The Picture only mode
is fixed.
AUDIO PROCESSING
STEREO MODULE
There are five different Audio sources: Antenna/Cable,
Aux video, S-Video, Rear Computer, and Front Computer/
Front Video.
The Tuner/IF section processes the Antenna/Cable
signal. It then passes as Composed Audio to the audio
processor to be demodulated.
SR23 - 923-035093-5CS - SERVICING
CIRCUIT OVERVIEW (continued)
IC2900
221-01053
Audio/Video
Switch
Volume Limiter
IC1400
221-01127
Surround
Bass/Treble
Balance
Volume
Matrix
SW1
SW2
IIC BUS
LSOUT
AUD (V-AUX)
AUD (S-VIDEO)
AUD
(COMPUTER
FRONT)
AUD
(COMPUTER
REAR)
COMPOSITE AUDIO
AUX1
AUX2
TVOUT
A/V SWITCHES
At the front jackpack one pair of audio jacks is used
with both the Computer and Aux. Video inputs. (If both
video inputs are in use the Aux. Video is selected as
default input.)
The rear jackpack includes one set of audio jacks for
the S-Video, another set of audio jacks for the Aux.
Video input, and a third pair for the RGB Computer
input.
The Audio processor IC1400 switches between the
Composite Audio input on pin 19 (Comp-in) from Tuner/
IF section and pins 39 & 40 (AUX1-R & AUX1-L, the L/
R channels from the A/V Switch ICX2900). The A/V Switch
chooses from among four inputs from external audio
sources (Rear and Front jackpacks). The I²C bus controls
both IC’s. The power amplifier IC801 and the variable
output monitor stage take the Left and Right channels
from the audio processor Lsout-L (pin 7) and Lsout-R
(pin 6) outputs.
SWITCH THEORY
Audio source selection for CS chassis sets is made
through two internal switches SW1 and SW2 inside the
IC1400 audio processor. These switches are controlled
by EXT1 and EXT2 registers to select COMPIN Tuner /IF
signal, AUX1 (Audio/Video switch), or AUX2 (Not used).
The A/V Switch chooses one of the Audio/Video input’s
external sources: Video Aux., S-Video, Rear Computer,
or Front Computer/Video.
NOTE: CS chassis does not use AUX2 input of IC1400
so register EXT2 is always 0.
The audio source selection is made through the EXT1
register of IC1400. EXT1 selects either Composite audio
or AUX1 input.
You can choose among the following inputs: Antenna/
Cable, Aux Video, S-Video, Front Computer/Video, and
Rear Computer SVGA/Rear Computer NTSC. First the Audio
Processor selects between COMPIN (TV) and AUX1 (A/V
Switch). Then when AUX1 has been selected, the A/V
switch IC2900 selects which auxiliary input goes to
the audio processor. The table below shows the IC2900
A/V switch and IC1400 audio processor register values
and the output source selected.
The audio source selection for the audio processor is
made according the next control table:
Mode controlAudioSource selection
EXT1 EXT2AUX2LSOUT
00OFFAntenna (Default)
01ONAntenna
10OFFA/V switch selection
11ONA/V switch selection
After the audio source selection is made, the sound
processor block processes the signal. The output signals
(LSOUT-L and LSOUT-R) are applied to both the Audio
power amplifier IC804 and variable audio monitor out.
The coupling between the Audio processor and the Audio
power amplifier is made through the electrolytic
capacitors C808 and C805. This is done in order to
block the DC level (4.0 V) of the LSOUT-L and LSOUT-R
pins respectively. The coupling between the Audio
processor and the variable monitor out is made through
of the capacitors C1449 and C1448.
The AV switch IC2900 has 7 audio inputs and 3 audio
outputs. Two of three outputs depend on video, and
the others are selectable from Main (Main video) or Sub
(PIP video). This chassis has no PIP.
D02 A/V switch register controls the sound selection
from Main or Sub (PIP):
D02 = 0 Main sound (Default value)
D02 = 1 PIP sound
SR23 - 923-035093-6CS - SERVICING
POWER SUPPLY
POWER SUPPLY DEFINITION
The Power Supply uses a COLD chassis and is a single
sided circuit board that has been developed for screen
sizes 27” through 36”. The power supply features two
switch mode power regulators for voltages sources. One
is intended for Standby sources and the other one
supplies the main switched voltages.
Both power supplies use direct regulation. One error
amplifier and one optocoupler are used for each power
supply. This chassis also is Energy Star compliant for
low power consumption in standby mode (less than 3
Watts of consumption). This is the main reason for the
standby power supply.
CIRCUIT OVERVIEW (continued)
Switch Mode Regulator
Stand By
Power Supply
Switched
Power Supply
Power
Control
AC
Line
SWITCH MODE REGULATOR
This chassis has a switching power supply (quasiresonant topology type). The AC line is routed through
the fuse FX3400 (4A @ 250 V fast blow) and then
through the bridge rectifier circuit BR3400 and CX3407.
The AC operation range is between 90 Vrms to 135 Vrms.
A filter consisting of LX3400 and CX3401 is employed
before the rectifier circuit to reduce noise from the AC
line and vice versa (EMI).
The voltage output of the rectifier (150VDC) is supplied
to the Main Switch Mode Regulator Power Supply (SMPS)
& Standby Switch Mode Regulation Power Supply. Its
output should be operating in the range of 127.3 VDC
to 190.9 VDC.
The Main SMPS consists of ICX3400, ICX3401, and
ICX3402. Its chopper transformer consists of TX3400
and the standby SMPS. The standby SMPS consists of
ICX3406, ICX3407, ICX3408, and the standby chopper
transformer TX3401.
STAND-BY START UP
When the PIN 4 of ICX3406 terminal voltage reaches 16
VDC (typical), the control circuit enables regulator
operation. Once the regulator output voltage is
established, the drive winding DX3415 starts to charge
CX3430 via DX3415. The voltage on CX3430 thus recovers
to the nominal drive voltage.
SR23 - 923-035093-7CS - SERVICING
CIRCUIT OVERVIEW (continued)
CR
D3200X
Q3200X
Proportional
H-Drive
RH
LH
LIN
CS1
CS2
HV
Regulation
Horizontal
Deflection
Yoke
T3202
T3201
Sweep
Transformer
PWM
Scan Boost
Converter
HV
F1
G2
GF
ABL
H-DRIVE
F0
40 VDC
HFLBK SHUTDOWN
High Voltage & Deflection
E/W-DRV
FH-STAT
DEFLECTION AND HIGH VOLTAGE
OVERVIEW
The principal function of the Deflection and HV circuits
is to supply horizontal and vertical currents to the
deflection yoke coils, and the high voltage generation.
They are designed for use in a dual frequency television,
15.75 and 37.9 Khz. They are dependent on other
circuits in the chassis to provide drive signal, DC control
voltages, correction waveform, etc. This section can be
divided into 7 functional blocks.
1. Horizontal Deflection and HV Generation
2. Scan Boost Converter
3. Base Drive
4. S-Capacitor Switched
5. HV Compensation
6. Shutdown Circuit
7. Vertical Deflection
HORIZONTAL DEFLECTION AND HV GENERATION
The Horizontal Deflection circuitry is a common flyback
type used in many television and monitor applications.
QX3200 is the Horizontal Output Transistor. When QX3200
is initially turned on, current is allowed to flow from
the B+ supply, through TX2900, T3201, and QX3200.
This allows energy to be stored in T3201. When QX3200
is turned off, some of this energy is returned to charge
the S-capacitor(s) CX3203, CX3204, and CX3205. After
several cycles (repeating at scanning frequency)
sufficient voltage appears across the S-capacitor
providing an additional path producing current flow
though the horizontal deflection yoke coil (connector
4X4). The Damper Diode DX3200 provides the negative
current path. The result is a positive and negative
sawtooth current through the horizontal deflection coils
(approximately 11 to 17 Amps. peak to peak).
SR23 - 923-035093-8CS - SERVICING
CIRCUIT OVERVIEW (continued)
Scan Boost Converter
B++
R4103
C4104
R4104
C4105
C4117
R4105
R4102
R4100
R4101
Q4100
R4107
R4408
C4100
R4106
R4109
R4120
C4103
R4114
R4113
R4110
R4111
C4101
C4102
R4112
R4130
D4100
R4116
C4106
R4115
C4107
R4117
+15V
10
VCC
6
5
4
1
2
3
14
13
9
8
R4122
R4123
+15V
Q4101
R4118
R4119
GND
+
1
-
+
2
-
R1
C1
OTC
PWMCOMP
C4111
D4101
R4125
Q4102
R4126
Q4103
L4100
RX4127
C4113
C4115
D4102
RX4128
B+
+40V
IN
IN
IN
IN
H-FLBK
FH-STAT
EW-DRV
F0
IN
0
0
7
0
0
R4124
0
IC4100
When QX3200 is turned off, about 1100 Volts peak of
flyback voltage is produced from the stored energy in
the horizontal deflection coils and T3201. This voltage
is induced to secondary windings of T3201 to generate
the high voltage from 28 to 30 KV. The flyback (or
retrace) period is about 5 µs.
A secondary winding on T3201 (pin 6) provides a low
voltage flyback pulse (H-FLYBK) used for synchronization
of the Scan Boost Converter and like a feedback signal
for the HV Compensation circuit. A capacitive divider,
CX3216 and CX3217, provides a low voltage flyback pulse
(H-FBP) used for synchronization, phase comparison,
etc. This pulse is sent to the main chassis via pin 6 of
connector 4G2.
Linearity Coil, L3200, is a saturating inductor skewed
by a permanent magnet bonded to the coil. It produces
a nonlinear inductance curve versus the current. This
characteristic cancels non-linear ties in the deflection
current caused by horizontal deflection coil resistance.
SCAN BOOST CONVERTER
Because the horizontal scan frequency is not constant,
a variable voltage source is required to supply the main
deflection circuit. The Scan Boost Converter circuit
accomplishes this. The +40 Vdc Power Supply (from main
switched mode power supply in the chassis) is boosted
to the voltage required for a given operating frequency
and becomes the B++ voltage to supply the main
deflection circuit. The scan converter is a pseudosynchronized, PWM, discontinuous, flyback type.
Pulse width modulation control is achieved by IC4100.
It’s function is to modulate the pulse width output at
pin 8 based on the error voltage resulting from
comparing the reference voltage at pin 2 with that at
pin 1.
Scan converter free run operating frequency is controlled
by R4120 and C4103. It is necessary to synchronize
this frequency with the incoming Horizontal Scanning
Frequency. Q4101 provides injection locking of the
oscillator by discharging C4103 during the horizontal
retrace interval, after which the oscillator is allowed to
free run only during the remaining scanning period.
The effect is a pseudo-sync-locked oscillator. This
provides improved noise and response performance,
while reliably operating in the discontinuous mode over
the entire horizontal operating frequency range.
The output at pin 8 drives the gate of the switching
transistor Q4103. The on interval determines the amount
of stored energy in L4100. The longer Q4103 is on, the
more energy is stored, resulting in a higher rectified
output voltage at B++ after Q4103 is turned off. Q4102
provides a fast turn off of Q4103.
SR23 - 923-035093-9CS - SERVICING
CIRCUIT OVERVIEW (continued)
Base Driver
IN
H-DRV
C4000
R4000
R4001
Q4000
R4003
C4001
R4002
Q4001
C4002
R4004
D4000
R4005
+15V
+15V
+15V
RX4006
Q4002
Q4003
R4008
RX4007
R4009
Q4004
R4011
C4005
C4003C4004
RX4010
+22V
L1
L2
L3
D4001
RX4012
RX4013 RX4014
OUT
OUT
HOT BASE
HOT EMITTER
0
0
0
0
0
0
00
0
0
0
0
00
One of the operational amplifiers of IC4100 (pins 1,2,
& 3) provides the error voltage needed to regulate the
B++ output voltage to a specified level. This voltage is
dependent on the horizontal scanning frequency and
is determined by the Deflection Processor (ICX2600 in
Main Chassis). A corresponding level 0 or 9 Vdc level
(NTSC or SVGA mode) is sent to pin 7 of connector 4G2
(F0 signal). The F0 signal switch Q4100 adjusts the
feedback path to have a B++ range of approximately 50
to 65 Vdc in NTSC mode and approximately 120 to 145
Vdc in SVGA mode. This depends on the EW-DRV level
from the same processor (Screen Size Control).
This circuit also receives a pincushion and size
correction signal. EW-DRV from the Deflection Processor
(ICX2600), Pin 4 of connector 4V2, modulates B++ to
provide keystone and pincushion geometric correction.
EW-DRV is a vertical deflection rate parabola.
The Change Mode Protection is accomplished by the
other operational amplifier in IC4100 (pins 13, 14, &
3). This protection is provided by comparing the FHSTAT signal from the Deflection Processor (ICX2600),
pin 8 of connector 4G2, with a 5 Vdc level. When a
change mode is performed (from NTSC to SVGA or vice
versa), the FH-STAT signal goes to low level forcing the
Scan Boost to work in a minimum mode (minimum B++)
to minimize the change mode transients.
BASE DRIVE
The Base Drive (Proportional Drive) circuit provides high
forward and reverse current to drive the base of the
Horizontal Output Transistor QX3200, from a low level
input (H-DRV from the Deflection Processor, ICX2600,
in Main Chassis) at pin 1 of connector 4H2. This signal
is approximately 9 volts peak at the operating frequency
and has a duty cycle of about 40% high, 60% low.
Current from H-DRV is amplified by transistor Q4002
and Q4003, providing a low impedance to rapidly drive
the gate of the drive transistor, Q4004. This action
results in and CX3204 are always connected in the
circuit. CX3205 is switched by Q3202 via F0 signal (pin
7 of connector 4H2) from the Deflection Processor,
ICX2600, in Main Chassis. This signal is buffered by
Q3201. At NTSC mode all capacitors are switched in,
and at SVGA mode only CX3203 and CX3204 are switched
in.
S-CAPACITOR SWITCHING
The “S” shaping capacitors, CX3203, CX3204 and
CX3205, provide the proper deflection current for
optimum raster linearity with the two frequencies. As
the horizontal scanning frequency increases, less capacity
is needed. CX3203 and CX3204 are always connected in
the circuit. CX3205 is switched by Q3202 via F0 signal
(pin7 of connector 4H2) from the Deflection Processor,
ICX2600, in Main Chassis. The signal is buffed by Q3201.
At NTSC mode all capacitors are switched in, and at
SVGA mode only CX3203 and CX3204 are switched in.
HV COMPENSATION
The flyback pulse voltage (H-FLYBK) from pin 6 of T3201
(Flyback Transformer) is peak detected (rectified) by
the diode D2901 and capacitor C2900. This forms a DC
voltage appearing on C2900 representative of the CRT
anode voltage produced by T3201. This voltage is used
in one of the operational amplifiers of IC3201 to provide
the error voltage needed to regulate the HV to a specified
level.
SR23 - 923-035093-10CS - SERVICING
CIRCUIT OVERVIEW (continued)
IN
IN
IN
IN
F0
EW-DRV
ABL
H-FLYBK
C2902
R2907
R2931
R2903
RX2900
RX2901
RX2902
RX2904
Q2900
D2901
R2905C2900
R2906
+15V
+15V
V+
V-
IC3201
C2915
R2911R2914
+5V
C2903
R2915
R2917
R2912
R2913
+15V
C2906
R2919
R2918
R2922
C2912
+15V
D2902
D2903
V+
V-
IC2900
+
-
+
-
+
-
V+
V-
IC2900
R2920
R2921
+15V
D2905
D2902
C2907
3
2
3
2
3
2
+15V
C2913
8
4
8
4
8
4
+15V
R2923
R2925
R2931
R2931
C2915
Q2905
R2933
R2934
+15V
+40V
RX2926
Q2904
Q2903
RX2929
R2928
D2904
C2908
Q2906
C2914
R2930
OUT
TO PIN 2 OF T3201
L2L1
C2911
Q2906
D2907
+22V
B++
0
0
0
0
0
0
0
0
0
00
0
0
0
0
0
0
0
0
0
HV Compensation
The error voltage is compared with a ramp signal
generated in one comparator of IC2900 and
synchronized by the flyback pulse (H-FLYBK) at
Horizontal Scanning Frequency. It modulates the pulse
width in the output to drive the gate of the switching
transistor Q2904. This ramp signal is present only
during the flyback pulse.
Q2904 is on during the scan time and as long as the
error voltage is higher than the ramp signal. This allows
energy to be stored in TX2900. When Q2904 is turned
off the resonant circuit formed by C2908 and the primary
inductance of TX2900 produce a flyback voltage of about
400 volts peak resulting from the store energy in TX2900.
This voltage is induced to secondary windings of TX2900
to add to voltage generated in Horizontal Deflection
circuit. This induce voltage is used to compensate load
variation (beam current variation) in HV Flyback
Transformer T3201. ABL and EW-DRV signals, weighted,
can be used to ameliorate the HV controller response.
Q2905 and Q2906 are used, with F0 signal from the
Deflection Processor (ICX2600 in Main Chassis), to
switch +22V or +40 V to pin 4 of TX2900 to maintain
the same energy stored in TX2900 for both modes (NTSC
and SVGA).
Q2900 and RX2952 (potentiometer) are used to adjust
the high voltage to a specified level and for coupling
with HV controller (IC3201.
SHUTDOWN CIRCUIT OPERATION
The flyback pulse voltage from pin 6 of T3201 (Flyback
Transformer) is peak detected (rectified) by the action
of diode D3206 and capacitor C3214. This forms a DC
voltage appearing on C3214 representative of the CRT
anode voltage (HV) procedure by T3201. This voltage
is divided down precision resistors RX3214, RX3215,
RX3216, and RX3217. This lower voltage appears on
the positive input (pin3) of IC3201. In the event the
CRT anode voltage become excessive, in IC3201 the
positive input (pin3) will be higher that negative input
(pin2) and therefore his output (pin1) will go to high
level at approximately 15 volts. This signal (SD-DVR) is
send to Base of Q4000 causing Horizontal Drive to be
disabled and latched causing HV goes down. In about
5 seconds, the shutdown-reset circuit (Pins 8,9 & 14
of IC2900) enabled again the Horizontal Drive and HV
must be reestablished.
The circuit formed by Q2907, C2913, C2916, D2908,
R2923, R2935, R2936 and R2937; disable the HV
compensation output (Q2902-B signal) during turn on
and shutdown conditions (transients).
VERTICAL DEFLECTION
The Vertical Deflection circuit, ICX2100, is a linear
amplifier that can directly drive the yoke current
(including the required DC component). The sawtooth
waveforms needed, as inputs, by ICX2100 are generated
in the Deflection Processor, ICX2600, in Main Chassis,
V-DRV+ and V-DRV, pin 1 and 2 of connector 4V2.
SR23 - 923-035093-11CS - SERVICING
ADJUSTMENTS
Yoke’s Glass Cloth Tape
Wedges’ Adhesive Tape (3)
Rubber Wedges (3)
Deflection Yoke
Purity & Convergence
Magnet Assembly Unit
6 Pole
Purity Magnet
4 Pole
Ring
Pairs
6 Pole
Convergence
R&B over G
Convergence
R over B
4 Pole
Rotation direction
of Both Tabs
Opposite
Opposite
Same
Same
Movement of Red
and Blue Beams
B
B
B
RR
B
BR
R
B
R
R
OR
OR
OR
BBR
R
OR
CRT Ring Location Purity
Adjust Tabs Beam Movement
for Convergence
PURITY & CONVERGENCE SETUP PROCEDURE
PRELIMINARY SETUP
1. Allow receiver to warm up for 15 to 20 minutes.
2. Degauss receiver.
3. Connect crosshatch generator to the receiver and
“rough in” the static (center) convergence.
Follow Convergence Status.
4. Adjust for best focus.
PURITY ADJUSTMENT
1. Purity tab positioning
Set the 2 pole purity tab together at 3 or 9 o’ clock
positions and the 4 and 6 pole purity tabs together
at 12 or 6 o’ clock positions.
2. Move yoke to maximum forward funnel position.
3. Now switch crosshatch generator to a red field.
4. Pull yoke towards rear of CRT neck centered or until
red raster is displayed.
5. If red raster is not displayed as a pure red field, adjust the 2 pole purity tabs until a pure field is obtained.
6. Check for proper yoke tilt setting.
CONVERGENCE ADJUSTMENT
1. Release locking assembly
2. Connect crosshatch generator to the receiver and
adjust static (center) convergence as follows:
a. Adjust the 4 pole static control by moving the two
tabs separately to converge red and blue lines horizontally. Move the two tabs together around neck of
CRT in a 45º arc) from the top dead center position
to converge red and blue lines vertically.
b. After the 4 pole control has been adjusted to super-
impose the red and blue lines on top of one another.
Use the 6 pole static adjustment to place converged
red and blue lines over the green line. Move the two
tabs together around neck of CRT (in a 30º arc) from
the top dead center position to move the lines vertically. Adjusting the two tabs separately will move converged beam to the left or right. Using a cross hatch
generator capable or producing individual fields, adjust generator to produce a red field. Use purity tabs
to center a red stripe.
SR23 - 923-035093-12CS - SERVICING
ADJUSTMENTS
X
4 Pole Magnets
Clamp and Screw
6 Pole Magnets
2 Pole Magnets
2" To 3"
MAGNET
ADJUSTMENTS
VERTICAL-TILT WEDGE ADJUSTMENT
The vertical lines at 6 and 12 o’clock are converged by
vertically tilting the yoke and inserting a wedge at the
top of the yoke until it is firmly seated between the
CRT glass and the horizontal coils.
HORIZONTAL-TILT WEDGE ADJUSTMENT
The vertical lines at 3 o’clock and 9 o’clock are converged
by horizontally tilting the yoke and inserting a wedge.
Adjust first at 4 or 8 o’clock, whichever has the larger
space, until the wedge is firmly seated between the CRT
glass and yoke coils. Then, insert the 3rd wedge in the
remaining horizontal tilt position until it is firmly seated
between the CRT glass and yoke coils. Convergence at 3
and 9 o’clock should be maintained during this
operation.
When the 3 wedges are firmly installed and positioned
for acceptable convergence, lock the wedges in place
by applying a 2.5 inches long strip of tape across the
tabs of each wedge, firmly against the CRT glass. The
CRT glass surface should be clean and free of dust and
other foreign material.
UNUSUAL TILT CASE
There may be some instances where the picture tube
and yoke will require vertical tilt in the opposite (up)
direction to obtain convergence. In such cases, insert
the vertical tilt wedge at the bottom (6 o’clock)
position. Follow through on the horizontal tilt
adjustment by using the 2 and 10 o’clock positions
and secure each wedge with a piece of tape, as described
above.
IMPROVING CRT CORNER PURITY
CRTs that display corner purity problems even after
following the service procedures can be modified with
a picture correction kit (P/N 949-50). The purity can
be improved by placing a picture-correction magnet
(included in the kit) on the CRT funnel. Refer to the
following modification steps and illustration to place
the magnet properly. Fully degauss the CRT before
installing correction magnets.
MODIFICATION
1. Place the magnet on the CRT funnel as shown in
the figure displayed below, in the quadrant exhibiting impurity.
2. Rotate the magnet in place to the position shown
for best purity.
3. Place a piece of 1/2" by 2" long Fiberglass tape
over the magnet to hold it in place.
4. Degauss the CRT once magnet is in place to insure
that the magnet is not over the internal magnet
shield.
NOTE: If the magnet is placed over the internal
magnet shield, any apparent purity correction
will disappear after degaussing. Reposition
the correction magnet off the internal shield
and degauss again.
All CS models are module level repair only. Parts
contact information is below.
Voice: 1-888-3-ZENITH
Fax:1-888-6-ZENITH
Mail:ZENITH NATIONAL PARTS
P O Box 240007
Huntsville, AL 35824-6407
MODEL PARTS
H27E46DT
ItemDescription
009-02097Module, Video Output
014-12254-P12Cabinet Rear
014-12336-P05Cabinet Front
020-04330-P62Coil, Degausser
030-01532-01Decorative Item, Logo, Zenith
050-02361-01Connector and Cable Assembly, 35V CTV Yoke
124-00233-04Space Command Transmitter, MBR3447C
192-00916Lens, IR
206-03755Instr Book, Operation & Installation
A-18299-04Line Cord and Terminals Assembly,
A-18378-01CRT Assembly w/Deflection Yoke and Bender
A-18695-P24Gnd Strap Ass’y, CRT
A-18793Accessory Kit, Cables and Software, Video
Mirror/Audio
A-19129PC Board Ass’y, VGA Card
F-53646Keyboard Ass’y, 10 Key with Tall IR
P009-02197Module, Large Signal
P009-02295-01Module, Small Signal
P049-01368-08Speaker, Oval, 6 X 13 cm
P050-02864-07Connector & Cable Assembly, Speaker
Interconnect
PF-54515Front Jack Ass’y with Cables
H27E46DT8
ItemDescription
009-02097Module, Video Output
014-12254-P12Cabinet Rear
014-12336-P05Cabinet Front
020-04330-P62Coil, Degausser
030-01532-01Decorative Item, Logo, Zenith
050-02361-01Connector and Cable Assembly, 35V CTV Yoke
124-00233-04Space Command Transmitter, MBR3447C
192-00916Lens, IR
206-03755Instr Book, Operation & Installation
A-18299-04Line Cord and Terminals Assembly
A-18378-P03CRT Assembly w/Deflection Yoke (2H) A, 27V
1.4R (Foshan)
A-18695-P24Gnd Strap Ass’y, CRT
A-18793Accessory Kit, Cables and Software, Video
Mirror/Audio
A-19129PC Board Ass’y, VGA Card
F-53646Keyboard Ass’y, 10 Key with Tall IR
P009-02197Module, Large Signal
P009-02295-01Module, Small Signal
P049-01368-08Speaker, Oval, 6 X 13 cm
P050-02864-07Connector & Cable, Assembly, Speaker
Interconnect
P149-00706Magnet, Purity Correction, ‘Chevron Magnet’
PA-19410Convergence Helper
PF-54515Front Jack Ass’y with Cables
H32E46DT
ItemDescription
009-02097-01Module, Video Output
014-12284-P33Cabinet Front
014-12285-P10Cabinet Rear
020-04330-33Coil, Degausser
030-01532-01Decorative Item, Logo, Zenith
124-00233-04Space Command Transmitter, MBR3447C
152-00335-01Wedge, CRT Spacer
192-00916Lens, IR
206-03755Instr Book, Operation & Installation
A-18299-04Line Cord
A-18695-03Gnd Strap Ass’y, CRT
A-18793Accessory Kit, Cables and Software, Video
Mirror/Audio
A-19111CRT Assembly w/Deflection Yoke and Bender
A-19129PC Board Ass’y, VGA Card
F-53707Keyboard Ass’y, 10 Key, with Short IR
P009-02198Module, Large Signal
P009-02295-02Module, Small Signal
P049-01368-08Speaker, Oval, 6 X 13 cm
P050-02864-06Connector & Cable, Assembly, Speaker
Interconnect
PA-19298-02PC Board Ass’y, Daughter
PA-19410Convergence Helper
PF-54515Front Jack Ass’y with Cables
H36E46DT
ItemDescription
009-02098Module, Video Output
014-12269-P18Cabinet Front
014-12270-P16Cabinet Rear
020-04330-34Coil, Degausser
030-01532-01Decorative Item, Logo, Zenith
050-02361-03Connector and Cable Assembly, 35V CTV Yoke
124-00233-04Space Command Transmitter, MBR3447C
192-00916Lens, IR
206-03755Instr Book, Operation & Installation
A-18299-04Line Cord
A-18695-04Gnd Strap Ass’y, CRT
A-18793Accessory Kit, Cables and Software, Video
Mirror/Audio
A-19110CRT Assembly w/Deflection Yoke and Bender
A-19129PC Board Ass’y, VGA Card
F-53707Keyboard Ass’y, 10 Key, with Short IR
P009-02199Module, Large Signal
P009-02295-03Module, Small Signal
P049-01368-08Speaker, Oval, 6 X 13 cm
P050-02864-06Connector & Cable, Assembly, Speaker
Interconnect
PA-19298-03PC Board Ass’y, Daughter
PA-19410Convergence Helper
PF-54515Front Jack Ass’y with Cables
SR23 - 923-035094-1CS - PARTS
COMPONENT PARTS LIST
A = H27E46DTC = H32E46DT
B = H27E46DT8D = H36E46DT
NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly.