An isolation transformer should always be used during the servicing of a receiver whose chassis is not
isolated from AC power line. Use a transformer of adequate power rating as this protects the technician
from accidents resulting in personal injuryfrom electrical shocks. It will also protect the receiver from
being damaged by accidental shorting that may occur during servicing.
When servicing, observe the original lead dress, especially in the high voltage circuit. Replace all
damaged parts (also parts that show signs of overheating.)
Always replace protective devices, such as fish paper, isolation resistors and capacitors, and shields after
servicing the receiver. Use only manufacturer’s recommended rating for fuses, circuits breakers, etc.
High potentials are present when this receiver is operating. Operation of the receiver without the rear
cover introduces danger for electrical shock. Servicing should not be performed by anyone who is not
thoroughly familiar with the necessary precautionswhen servicing high voltage equipment.
Extreme care should be practiced when handling the picture tube. Rough handling may cause it to
implode due to atmospheric pressure. (14.7 lbs per sq. in.). Do not nick or scratch the glass or subject it
to any undue pressure. When handling, usesafety goggles and heavy gloves for protection. Discharge the
picture tube by shorting the anode to chassis ground (not to the cabinet or to other mounting hardware).
When discharging connect cold ground (i.e. dag ground lead) to the anode with a wellinsulated wire or
use a grounding probe.Avoid prolonged exposure at close range to unshielded areas of the picture tube
to prevent exposure to x ray radiation.
The test picture tube used for servicing the chassis at the bench should incorporate safety glass and
magnetic shielding. The safety glass provide shielding for the tube viewing area against x ray radiation
as well as implosion. The magnetic shieldlimits the x ray radiation around the bell of the picture tube in
addition to the restricting magnetic effects. When using a picture tube test jig for service, ensure that the
jig is capable of handling 50kV without causing x ray radiation.
Before returning a serviced receiver to the owner, the service technician must thoroughly test the unit to
ensure that is completely safe to operate. Do not use a line isolation transformer when testing.
Leakage current cold check
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Unplug the A.C. cord and connect a jumper between the two plug prongs.Measure the resistance
between the jumpered AC plug and expose metallic parts such as screwheads, antenna terminals, control
shafts, etc. If the exposed metallic part has a returnpath to the chassis, the reading should be between
240kΩ and 5.2MΩ. If the exposed metallic part does not have a return path to the chassis, the reading
should be infinite.
Leakage current hot check
Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during the check.
Connect a 1.5kΩ 10 watt resistor in parallel with a 0.15μF capacitor between an exposed metallic part
and ground. Use earth ground, for example a water pipe.
Using a DVM with a 1000 ohms/volt sensitivity or higher, measure the AC potential across the resistor.
Repeat the procedure and measure the voltage present with all other exposed metallic parts.
Verify that any potential does not exceed 0.75 volt RMS. A leakage current tester (such a Simpson
model 229, Sencore model PR57 or equivalent) may be used in the above procedure, in which case any
current measure must not exceed 0.5 milliamp. Ifany measurement is out of the specified limits, there is
a possibility of a shock hazard and the receiver must be repaired and rechecked before it is returned to
the customer.
Hot check circuit
Insulation test
Connect an insulation tester between an exposed metallic part and A.C. line. Apply 1080VAC/60Hz for
1 second. Confirm that the current measurement is 0.5mA ~ 2.0mA. Repeat test with other metallic
exposed parts.
X ray radiation
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The potential source of x ray radiation in the TV set is in the high voltage section and the picture tube.
NOTE
It is important to use an accurate, calibrated high voltage meter.
Set the brightness, picture, sharpness and color controls to minimum.
Measure the high voltage. The high voltage should be 33.0 ± 1.0kV. If the upper limit is out of
tolerance, immediate service and correction is required to insure safe operation and to prevent the
possibility of prematurecomponent failure.
Horizontal oscillator disable circuit test
This test must be performed as a final check before the receiver is returned to the customer. See
horizontal oscillator disable circuit procedure check in this manual.
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These components are affixed with glue. Be careful not to break or damage any foil under the
component or at the pins of the ICs when removing. Usually applying heat to the component for a short
time while twisting with tweezers will break the componentloose.
Leadless chip component (surface mount)
Chip components must be replaced with identical chips due to critical foil track spacing. There are no
holes in the board to mount standard transistors or diodes. Some chips capacitor or resistor board solder
pads may have holes through the board,however the hole diameter limits standard resistor replacement
to 1/8 watt. Standard capacitor may also be limited for the same reason. It is recommended that identical
components be used.
Chip resistor have a three digit numerical resistance code, 1st and 2nd significant digits and a multiplier.
Example: 162 = 1600 or 1.6kΩ resistor, 0 = 0Ω (jumper).
Chip capacitors generally do not have the value indicated on the capacitor. The color of the component
indicates the general range of the capacitance.
Chip transistors are identified by a two letter code. The first letter indicates the type and the second
letter, the grade of transistor.
Chip diodes have a two letter identification code as per the code chart and are a dual diode pack with
either common anode or common cathode. Check the parts list for correct diode number.
Component removal
1. Use solder wick to remove solder from component end caps or terminal.
2. Without pulling up, carefully twist the component with tweezers to break the adhesive.
3. Do not reuse removed leadless or chip components since they are subject to stress fracture during
removal.
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1. Put a small amount of solder on the board soldering pads.
2. Hold the chip component against the soldering pads with tweezers or with a miniature alligator
clip and apply heat to the pad area with a 30 watt iron until solder flows. Do not apply heat for
more than 3 seconds.
How to replace flat ic (required tools)
1. Remove the solder from all of the pins of a Flat IC by using a desolder braid
2. Put the iron wire under the pins of the Flat IC and pull it in the direction indicated while heating
the pins using a soldering iron. A small awl can be used instead of the iron wire.
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3. Remove the solder from all the pads of the Flat IC by using a de solder braid
4. Position the new Flat IC in place (apply the pins of the Flat IC to the soldering pads where the
pins need to be soldered). Properly determine the positions of the soldering pads and pins by
correctly aligning the polarity symbol
5. Solder all pins to the soldering pads using a fine tipped soldering iron
6. Check with a magnifier for solder bridge between the pins or for dry joint between pins and
soldering pads. To remove a solder bridge, use a de solder braid as shown in the figure below
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To protect against possible damage to the solid state devices due to arching or static discharge, make
certain that all ground wires and CRT DAG wire are securely connected.
CAUTION
The power supply circuit is above earth ground and the chassis cannot be polarized. Use an isolation
transformer when servicing the receiver to avoid damage to the test equipment or to the chassis. Connect
the test equipment to the proper ground(hot) or (cold) when servicing, or incorrect voltages will be
measured.
2.1 X-Ray Protection Circuit Check& Adjustments
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This test must be performed as final check before the receiver is returned to the customer. If voltages are
out of tolerance, immediate service and correction is required to insure safe operation and to prevent the
possibility of premature componentfailure.
Equipment:
1. Isolation transformer.
2. High voltage meter.
3. D.C. Ammeter
4. Short jumper.
5. HHS jig (See figure below).
Diode Connection Jumper.
Preparation:
1. Make sure the receiver is turned off.
2. Connect the receiver to an isolation transformer.
3. Connect the ammeter serial from the flyback anode lead to the picture tube anode socket.
4. Prepare short jumper and HHS jig.
Procedure:
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Correct ID switch configuration should be input when replacing EEPROM for each television model,
otherwise if wrong values are configured, the television software will not function accordingly and
properly.
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Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to lead solder, and PbF will refer to Lead Free Solder.
The lead free solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
Thatis Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For
service and repair work, we’d suggest the use of Pb free solder as well, although Pb solder may be
used.
PCBs manufacturedusing lead free solder will have the “PbF” or a leaf symbol stamped on the
back of PCB.
CAUTION
●Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~
70 °F (30 ~ 40 °C) higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F
(370 ± 10 °C).
●Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder
area before applying Pb solder. If thisis not practical, be sure to heat the Pb free solder until it
melts, before applying Pb solder.
●After applying PbF solder to double layered boards, please check the component side for excess
solder which may flow onto the opposite side.
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There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin,
silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also
beused.
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FEATURE/MODEL CT-32SL13G CT-36SL13G
CHASSIS AP411 AP412
MICRO 128K
MENU LANGUAGE ENG/SPAN/FR
CLOSED CAPTION X
V-CHIP (USA/CANADA) X
CHANNEL COUNT 181
CHANNEL INFO BANNER X
VIDEO INPUT SKIP X
75 OHM INPUT X
REMOTE CONTROL EUR7613Z60
CRT SUPPLIER MDDA FLAT (4:3)
CHASSIS NA10FL
COMB FILTER MOTION ADP 3 DIG
HEC/VEC (X=BOTH) X
VM X (DIGITAL)
V/A NORM (X=BOTH) X
COLOR TEMP X
PRESET/INPUT LABELING X
VIDEO PICTURE MEMORY X
MTS/SAP/DBX X
BUILT-IN AUDIO POWER 10Wx2
No. OF SPEAKERS 2
BASS/BALANCE/TREBLE CONTROL X
AI SOUND X
SURROUND X
SPATIALIZER/BBE BBE
A/V IN (REAR/FRONT) 3(2/1)
A/V PROGRAM OUT X
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AUDIO OUT (FAO:F, VAO:V) F, V
COMPONENT INPUT (Y, Pb, Pr) 1
S-VIDEO INPUT (REAR/FRONT) 1/1
EPJ/HPJ/MISC HPJ
FEATURE/MODEL CT-32SC13G CT-36SC13G
CHASSIS BP411 BP412
MICRO 128K
MENU LANGUAGE ENG/SPAN/FR
CLOSED CAPTION X
V-CHIP (USA/CANADA) X
CHANNEL COUNT 181
VIDEO INPUT SKIP X
75 OHM INPUT X
75 OHM INPUT X
REMOTE CONTROL EUR7613Z60
CRT SUPPLIER MDDA FLAT (4:3)
CHASSIS NA10FL
COMB FILTER 3-LINE
HEC/VEC (X=BOTH) X
VM X (DIGITAL)
V/A NORM (X=BOTH) X
COLOR TEMP X
PRESET/INPUT LABELING X
VIDEO PICTURE MEMORY X
MTS/SAP/DBX X
BUILT-IN AUDIO POWER 5Wx2
No. OF SPEAKERS 2 (DOME)
BASS/BALANCE/TREBLE CONTROL X
AI SOUND X
SURROUND X
SPATIALIZER/BBE BBE
A/V IN (REAR/FRONT) 3(2/1)
A/V PROGRAM OUT X
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AUDIO OUT (FAO:F, VAO:V) F, V
COMPONENT INPUT (Y, Pb, Pr) 1
S-VIDEO INPUT (REAR/FRONT) 1/1
EPJ/HPJ/MISC HPJ
FEATURE/MODEL CT-3653G
CHASSIS BP412
MICRO 128K
MENU LANGUAGE ENG/SPAN/FR
CLOSED CAPTION X
V-CHIP (USA/CANADA) X
CHANNEL COUNT 181
VIDEO INPUT SKIP X
75 OHM INPUT X
75 OHM INPUT X
REMOTE CONTROL EUR7613Z60
EXTRA REMOTE CONTROL EUR7713010
CRT SUPPLIER MDDA FLAT (4:3)
CHASSIS NA10FL
COMB FILTER 3-LINE
HEC/VEC (X=BOTH) X
VM X (DIGITAL)
V/A NORM (X=BOTH) X
COLOR TEMP X
PRESET/INPUT LABELING X
VIDEO PICTURE MEMORY X
MTS/SAP/DBX X
BUILT-IN AUDIO POWER 7.5Wx2
No. OF SPEAKERS 2 (DOME)
BASS/BALANCE/TREBLE CONTROL X
AI SOUND X
SURROUND X
SPATIALIZER/BBE BBE
A/V IN (REAR/FRONT) 3(2/1)
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Remove all the screws marked with an arrow (←) from the back of the receiver
NOTE
Screw location and quantity may vary depending on the model of the receiver serviced and the
application; various models are covered in this manual. Use same hardware when reassembling the
receiver.
● 4 screws at the top edge of the receiver.
● 4 screw by the A/V jacks.
● 1 screw by the antenna jacks.
● 1 screw at the lower part of TV.
● 1 screw at each lower corner of the receiver.
● 1 screw by the retainer plate of the AC power cord.
● 1 screw by the A.C. cord assembly.
NOTE
Extensions for board connectors may be needed to take voltages on some boards, please see parts list
section for part numbers in this service manual.
A-Board - Main chassis
The A-Board assembly rest on a chassis tray along with the D-Board.
Slide chassis tray out. Gently lift the tray and pull out. Disconnect plug connectors; release wire ties and
holders as required for complete chassis removal.
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1. A-Board is secured to the chassis tray with screws.
2. The A-Board is mated to the D-Board by three flexible connectors: A5, A6 & A7 (D5, D6 & D7
on the D-Board, respectively). To remove either boards, unplug the connectors on the A-Board.
NOTE
Some tie-wraps that secure the wire dressings may need to be unfastened for chassis removal
D-Board - Deflection
The D-Board assembly rest on a chassis tray along with the A-Board.
Slide chassis tray out. Gently lift the tray and pull out. Disconnect plug connectors; release wire ties and
holders as required for complete chassis removal.
1. D-Board is secured to the chassis tray with screws.
2. The D-Board is mated to the A-Board by three flexible connectors: D5, D6 and D7 (A5, A6 &
A7 on the A-Board, respectively). To remove either boards, unplug the connectors on the ABoard.
NOTE
Some tie-wraps that secure the wire dressings may need to be unfastened for chassis removal
L-Board - CRT output
Plugs into the socket on the CRT neck.
To remove this board, first unplug the board from the CRT neck, then disconnect L1, L2 and L3
connectors, to disconnect the focus F1(red cable) & F2 (white cable) cables from the CRT socker, pull
the tab and release the cables (see figure),finally disconnect the screen cable from the D-Board D16
(screen and heater).
To reinsert back the cables, remember the original position of cables, F1 (red cable) goes to A on the
CRT socket and F2 (white cable) goes to B on the CRT socket.
F1 and F2 cables release
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To release screen GND cables from L-Board L11 & L12 connectors, insert a wire in both sides of
connector and pull upwards the cable, then remove the wire.
L11 and L12 cables release
G-Board
Mated to A-Board by three flexible connectors A1, A2, A3 and D40 from D-Board. To remove this
board, first unplug the four flexible connectors, then RT1 and G4connectors, then pull upwards the
board while unlock the tabs from the chassis tray.
Speakers
Each speaker is secured to a plastic base with 4 screws, and each plastic base is secured to the from
cabinet with two screws.
NOTE
When reassembling speakers be sure to connect the speaker wires to the correct speaker lead (+) (-)
10.1 Disassembly for CRT replacement
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1. Discharge the CRT as instructed in the “safety precautions” section and remove 2nd anode button
from the CRT.
2. Remove speaker modules (R and L)
3. Perform complete removal of chassis, as instructed in “disassembly for service” section.
NOTE
When remounting the CRT, reuse the metal sheet located in the lower part of the cabinet holding
the CRT, hold with screws to the cabinet. This metal sheet is not supplied with the CRT
replacement.
CRT replacement
1. Perform “disassembly for CRT replacement” procedure.
2. Insure that the CRT H.V. Anode button is discharged before handling the CRT. Read the “safety
precautions” section on handling the picture tube.
3. Remove the components from the CRT neck and place the cabinet face down on a soft pad.
4. Note the original order for the CRT mounting hardware as they are remove from the CRT
mounting brackets at each corner of the CRT.
5. Remove the CRT with the degaussing coil and the dag ground braid attached.
NOTE
To remove the four brackets holding the degauss coil from the corners of the CRT, first remove
the CRT from the cabinet, then remove the brackets by pressing the tab on the bracket and pull
upwards. These brackets are included in the degauss coilkit, for part number, please see parts list
section
Brackets removal
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6. Note the original locations and mounting of the degaussing coil and the dag ground assembly to
insure proper reinstallation on the replacement CRT.
To remove and remount the degaussing coil:
❍ Unhook the coil spring from the bottom corners of the CRT ears.
❍ Release the braid loop from the upper corners of the CRT ears.
7. Mount the dag ground braid on the replacement CRT. Position the degaussing coil with new ties.
Dress coil as was on the original CRT.
8. Replace the components on CRT neck and reinstall into cabinet. Verify that all ground wires and
circuit board plugs get connected.
NOTE
Reuse all the clampers and mounting brackets from the degauss coil and screen, and when
remounting the degauss coil assure that is not touching the speakers, this can be done by placing
some tape, this may cause mask vibration. The mounting brackets andclampers are not supplied
with the replacements.
IMPORTANT NOTICE
When ordering the CRT, please order CRT and CRT kit also. Please see parts list section for part
numbers.
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All service adjustments are factory preset and should not require adjustment unless controls and/or
associated components are replaced.
Note:
Connect the (-) lead of the voltmeter to the appropriate ground. Use IC801’s heat sink when the HOT
ground symbol is used. Otherwise, use COLD ground (tuner shield, IC451’s heat sink or FA2).
Component and Voltage Test Points
Note:
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Adjustment is necessary only if the CRT or the deflection yoke is replaced or if the setting was
disturbed. The complete procedure consists of:
1. Vertical raster shift adjustment.
2. Initial static convergence.
3. Setting the purity.
4. Final static convergence.
WHEN THE CRT OR THE YOKE IS REPLACED
For 2 piece assembly:
Position purity/convergence assembly as shown and tighten clamp snugly. Remove the hot-melt glue
seal on assembly and position like tabs of purity device together at 12 o’ clock to reduce its magnetic
field effect.
2 piece assembly
For models using 4 pairs of rings, place the yoke on the CRT neck (do not tighten the clamp). Place the
vertical raster shift tabs at 3 o’clock (90° from the purity and convergence tabs.
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Apply a green pattern with a horizontal line, adjust the Deflection Yoke so that has no tilt, then secure it.
Adjust center line of the pattern with the mechanical center of the CRT, this center is determined by two
marks at the side edges of the screen. To adjust the line, once the vertical raster shift tabs are place at 3
o’clock to reduce itsmagnetic field effect open the tabs the same angle from the center, until the center
line of the pattern becomes a straight line, centered with the marks of the CRT.
IMPORTANT NOTICE
Rings come along with deflection yoke in one piece.
Vertical raster shift adjustment
INITIAL CENTER STATIC CONVERGENCE
Connect a dot/cross hatch generator to the receiver and tune in a signal. Observe misconvergence at
center of the screen only.
Adjust the R&B pole magnets; by separating tabs and rotating to converge blue with red.
Adjust the R&B and R&B&G pole magnets: by separating tabs and rotating to converge blue and red
(magenta) with green.
NOTE
Precise convergence at this point is not important.
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When the receiver is in the serviceman mode for making electronic adjustments, press the RECALL
button on the remote control to enter purity check. (See the service adjustments electronic controls
procedure).
Operate the receiver for 60 minutes using the first purity check field (white screen) to stabilize the CRT.
Fully degauss the receiver by using an external degaussing coil.
Press the RECALL button on the remote control again until the purity check (green screen) appears.
Loosen the deflection yoke clamp screw and move the deflection yoke back as close to the purity
magnet as possible.
Adjust the purity rings to set the vertical green raster precisely at the center of the screen.
Green raster adjustment
Slowly move the deflection yoke forward until the best overall green screen is displayed.
Tighten the deflection yoke clamp screw.
Press the RECALL button on the remote control again until the purity check blue and red screens appear
and observe that good purity is obtained on each respective field.
Press the RECALL button on the remote control again until purity check (white screen) appears.
Observe the screen for uniform white. If purity has not been achieved, repeat the above procedure.
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Vertical size and focus adjustments must be completed prior to performing the convergence adjustment.
Connect a dot pattern generator to the receiver. The brightness level should not be higher than necessary
to obtain a clear pattern.
Converge the red and the blue dots at the center of the screen by rotating the R&B pole static
convergence magnets.
Align the converged red/blue dots with the green dots at the center of the screen by rotating the R&B&G
pole static convergence magnets. Melt wax with soldering iron to reseal the magnets.
Slightly tilt vertically and horizontally (do not rotate) the deflection yoke to obtain a good overall
convergence.
If convergence is not reached at the edges, insert permalloy in the DY corners to achieve proper
convergence. Recheck for purity and readjust if necessary.
After vertical adjustment of the yoke, insert wedge at 11 o’clock position, then make the horizontal
tilt adjustment.
Secure the deflection yoke by inserting four side wedges.
Apply adhesive between tab (thin portion) of wedge and CRT and place tape over the tab to secure to the
CRT.
The purpose of this adjustment is to move the focus in the picture, so the focus is in balance in the whole
picture (same level). Perform this adjustment as a visual adjustment, centering both waveforms, repeat
adjustment until best adjustment isobtained.
PREPARATION
1. Picture settings normalized.
PREPARATION
1. Apply a crosshatch pattern.
2. Connect channel one of the oscilloscope with 100x1 probe to DAF OUT to TPP33 or TPD40 (DBoard).
3. Connect channel two of the oscilloscope with 10x1 probe to HEATER (L-Board).
4. If the the waveforms position are vercally different, adjust (HDAFP) DATA so that become the
same position.
NOTE
Both waveforms should be centered. Upper waveform could be different depending on the
pattern applied
DAF adjustment
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This receiver has electronic technology using the IC bus concept. It performs as a control function and it
replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the
control functions are now performedby using “on screen display menu”. (The service adjustment mode).
NOTE
It is suggested that the technician reads all the way through and understand the following procedure for
entering/exiting the service adjustment mode; then proceed with the instructions working with the
receiver. When becoming familiarwith the procedure, the flow chart for service mode may be used as a
quick guide.
Quick entry to service mode
When minor adjustments need to be done to the electronic controls, the method of entering the service
mode without removal of the cabinet back is as follows using the remote control:
1. Select SET-UP icon and select CABLE mode.
2. Select TIMER icon and set SLEEP time for 30 Min.
3. Press “ACTION” twice to exit menus.
4. Tune to the channel 124.
5. Adjust VOLUME to minimum (0).
6. Press VOL → (decrease) on receiver. Red “CHK” appears in upper corner.
To toggle between aging and service modes:
While the “CHK” is displayed on the left top corner of the CRT, pressing “ACTION” and
“VOL” UP on the TV simultaneously will toggle between the modes. Red “CHK” for serviceand
yellow “CHK” for aging.
7. Press POWER on the remote control to display the service adjustment modes menu, select
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adjustment by pressing the volume right/left buttons and channel up/down buttons on the remote
and ACTION to enter the adjustment.
Exiting the service mode:
This TV goes out from service mode when it is unplugged or turned OFF. To exit the service mode, turn
the TV OFF from or unplug the TV from A.C.
Other method
Press ACTION and POWER on the receiver simultaneously for at least 2 seconds.
The receiver momentarily shuts off; then comes back on tuned to channel 3 with a preset level of sound.
Any programmed channels, channels caption data and some others user defined settings will be erased
when exited by pressing ACTION and POWER on receiver.
IMPORTANT NOTE
Always check that the TV exits the service mode.
To confirm colors
When in service mode (red “CHK” is displayed) press RECALL on the remote control to enter the
purity field check mode
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V-C VERTICAL LINEARITY 21
V-S VERTICAL S CORRECTION 11
HDAFP DAF C4
HDAFW DAF 88
VPOS VERTICAL POSITIONING 7E
ID1* ID SWITCH 1 FC
ID2* ID SWITCH 2 7F
ID3* ID SWITCH 3 7B 48
IMPORTANT:
These table values are approximated and could change due to variation of electrical characteristics in
each set, except for the ID switch values.
*Note:
The correspondent ID switch (ID1, ID2, ID3) data configuration should not be modified in any way. If
EEPROM circuit needs to be replaced, these ID values should be configured according with this table.
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14.1 Sub-Brightness and Contrast
Service DAC adjustment (BRIGH, CONT)
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Adjustment of this control is important for setting proper operation of customer brightness and picture
controls. Do not adjust the SCREEN VR after the sub-brightness is set.
This adjustment is factory set. Do not adjust unless repairs are made to associated circuit, the CRT
Board or when the CRT is replaced.
Preparation
1. Apply a black and white pattern.
Note:
If a black and withe pattern is not available, a color bar pattern with no color can be used
following the same procedure; the waveform will be different
2. Set the PICTURE control to the maximum.
3. Set COLOR control to minimum (no color on picture).
4. Set the BRIGHTNESS control to the center.
5. Set the SHARPNESS control to the center.
6. Connect the oscilloscope to TP35.
Procedure
1. In the service mode, select DAC for brightness adjustment “BRIGH”, and adjust data to obtain
2.3±0.1V between 7.5IRE and GND level at TP35. (See waveform detail).
2. In service mode, select DAC for contrast adjustment “CONT”, and adjust data to obtain 3.0±0.1V
between 7.5IRE and 100IRE level at TP35. (See waveform detail)
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14.2 Color output adjustment
Service DAC adjustment (COLOR, TINT)
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NOTE
if a rainbow pattern generator is available perform the following procedure; the next section describes
the procedure with no rainbow pattern.
Make sure that sub-contrast adjustment was finished prior to perform this adjustment.
Preparation
1. Normalize the picture settings.
2. Set the BRIGHTNESS control to minimum.
3. Set the COLOR control to the center.
4. Set the TINT control to the center.
5. Set the PICTURE control to the maximum.
6. Set the SHARPNESS control to the minimum.
Procedure
1. Apply a rainbow color bar pattern.
2. Connect the oscilloscope to TP37.
3. In service mode adjust “TINT” register until the waveform measured is as the one shown. Tint
level from C and B peaks must be almost in the same level and from A and C must be 0.35 Vpp.
TP37 Waveform.
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To reset deflection adjustments to factory adjusted default, enter to service mode (with red CHK
displayed), press POWER button on remote to display the service menu, then press and hold RECALL
button for at least three seconds, a reset messagewill appear in the image.
Use this feature when deflection adjustment gets off adjustment to the point that it cannot be adjusted
back easily.
14.5.1 H-Center adjustment
14.5.2 H-Width adjustment
14.5.3 Trapezoid adjustment
14.5.4 Parallelogram adjustment
14.5.5 E-W PCC balance adjustment
14.5.6 Vertical linearity(V-C), V-Size and V-Position adjustment