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Service Manual
TC-21FJ30LAGP3 Chassis
TELEVISOR
Power source
Consumption
Antenna input jack
Color systems
Tuning system
Channel capability
Picture Tube (visual diagonal)
Potência de áudio
Video input jack
Audio input jack
Video output jack
Audio output jack
DVD input jack
Dimension (width, height, depth)
Weight
REMOTE CONTROL TRANSMITER:• Model: TNQ2B3302• Power source: 3V (2 AA type batteries)• Infrared Length: 9500 Å (angstron)
SUPPLIED ACCESSORIES:• 1 Remote Control Transmitter• 1 300Ω/75Ω Aerial Adaptor• 2 “AA” type batteries
Specifications
TC-21FJ30LA
110V / 220V AC, 60Hz
automatic switch
90W
75Ω - VHF/UHF/CATV
PAL-M / NTSC / PAL-N
F.S.T.
2 to 13 (VHF), 14 to 69 (UHF) and 1 to 125 (Cable)
PANABLACK - 21” Flat CRT, 53 cm (NBR5258) - 51 cm diagonal visual
Specifications are subject to change without notice. Weight and dimensions shown are approximate.
Order DCS - DEZ2004 - 002 - MS
- 2 -
TC-21FJ30LA
General Guidelines
An Isolation Transformer should always be used during the servicing
of a receiver whose chassis is not isolated from the AC power line. Use
a transformer of adequate power rating as this protects the technician
from accidents resulting in personal injury from 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 fishpaper, isolation
resistors and capacitors, and shields after servicing the Receiver. Use
only manufacturer’s recommended rating for fuses, circuit breakers,
etc.
High potentials are present when this Receiver is operating. Operation
of the Receiver without the rear cover introduces danger from electrical
shock. Servicing should not be performed by anyone who is not
thoroughly familiar with the necessary precautions when 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 sick or scratch the glass or subject it to any
undue pressure. When handling, use safety 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 well insulated 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 provides shielding for the tube viewing area against X-ray radiation
as well as implosion. The magnetic shield limits X-ray radiation around
the bell of the picture tube in addition to restricting magnetic effects.
When using a picture tube test jig for service, ensure that the jig is
capable of handling 31kV 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.
Important Safety NoticeSpecial components are used in this television set which are important for safety. These parts are identified on the schematicdiagram by the symbol . It is essential that these critical parts are replaced with the manufacturer’s specified replacementparts to prevent X-ray radiation, shock, fire or other hazards. Do not modify the original design without manufacturer’s permission.
Warning !It is essential that these critical parts are replacedwith the manufacturer’s specified replacement partsto prevent X-ray radiation, shock, fire or other haz-ards.
REPLACEMENT MECHANICAL PARTS LIST ........................................ 27
REPLACEMENT ELECTRICAL PARTS LIST .......................................... 28
!
!
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TC-21FJ30LA
ABOUT LEAD FREE SOLDER (PbF)
Note:In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder thatcontains lead.We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),Silver, (Ag), and Copper, (Cu).This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repairwork we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.
Caution• PbF solder has a melting point that is 50° ~ 70° F, (300° ~ 400°C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700° ± 20° F, (370° ± 10°C).In case of using high temperature soldering iron, please becareful not to heat too long.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).• If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible
and be sure that any remaining is melted prior to applying the Pb solder.• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See figure, below).
SUGGESTED PbF SOLDERThere are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with othermaterials.The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
HOW TO RECOGNIZE THAT PB FREE SOLDER IS USEDP.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) Pb Free is not used the Power Supply Board of thisunit.(Example : Digital Board)
CN612
18
E
L659
L661
L660
IC605
R70
L619
L618
C667
R708
L630
R611
F605
R736
L620
L621
R723
R613
R610
C717
C731
C694
L655
L643
L604
L606
L605
R767
R769
R768
L656
L657
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75
51
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2625
1
76
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C738
C668
RA610
RA609
D602
J600
8
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IC610
Q613
C726
D607
D608
R737
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16
L624L625L626
L658
L653L654
L642
C666
BAT600
PFUP1330YA PbF
RA602
C672
C728
+24V
+3.3V/BAT
25
DIGITAL BOARD COMPONENT VIEW
Marked
- 4 -
TC-21FJ30LA
OPERATING INSTRUCTIONS
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- 5 -
TC-21FJ30LA
IC601 - PINOUT
P3.1/ADC1 1 port 3.1 or ADC1 input
P3.2/ADC2 2 port 3.2 or ADC2 input
P3.3/ADC3 3 port 3.3 or ADC3 input
VSSC/P 4 digital ground for m-Controller core and periphery
P0.5 5 port 0.5 (8 mA current sinking capability for direct drive of LEDs)
P0.6/CVBSTD 6 port 0.6 (8 mA current sinking capability for direct drive of LEDs) or Composite video input. A positive-going
1V (peak-to-peak) input is required
VSSA 7 digital ground of TV-processor
SECPLL 8 SECAM PLL decoupling
VP2 9 2nd supply voltage TV-processor (+8V)
DECDIG 10 supply voltage decoupling of digital circuit of TV-processor
CHK1 MODE - OPTIONSOn CHK1 mode it is possible to adjust the items of the table shown here.Note:To select an item, type “4” to move forward and “3” to move back.After having selected the desired option, adjust it by pressing the “VOL(_)” or “VOL(+)”keys. The OSD color will change for red.Press “0” To memorize the adjustment.
THE DAC CONTROL FOR GP3 CHASSIS FUNCTIONS AND ADJUSTMENTS
HOW TO ENTER IN THE SERVICE MODE:
1- Set the “OFF TIMER” to 30 minutes.2- Press simultaneously “RECALL” key on the remote control and VOL(-) button on the unit.
After a couple of seconds, the expression “CHK” should appear on the right superior side of the screen. (To changethe memory data, press MUTE and VOLUME(_) simultaneously while the OSD is still on CHK1 mode. Key “4” movesforward in the memory, and key “3” moves back in the memory
Note: To alter from CHK1 mode to CHK2, CHK3 or CHK4 modes, press key “2” to move forward and the key “1” tomove back, as illustrated below.
TO EXIT SERVICE MODE AND RETURN TO NORMAL MODE:Press the “NORMAL” key on the remote control unit or turn off the TV.
CHK1 - OPTIONSOn CHK1 mode, it is possible to adjust the options below:
Turn Off
NORMAL MODE
OPTION CODESETTING
“2”
“1”
VCJADJUSTMENT
CHK1
SERVICE MODE
“2” “2”
“1” “1”
PINCUSHIONADJUSTMENT
WHITE BALANCEADJUSTMENT
CHK2 CHK3“2”
“1”
STEREOADJUSTMENT
CHK4 CHK5
Note:To select an option, type “4” to move forwardand “3” to move back.After having selected the desired option, adjustit by pressing the “VOL(_)” or “VOL(+)” keys.Press “0” to memorize the adjustment.
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TC-21FJ30LA
CHK2 MODE - VCJ ADJUSTMENTSOn CHK2 mode it is possible to adjust the items of the table shown here.Note:To select an item, type “4” to move forward and “3” to move back.After having selected the desired option, adjust it by pressing the “VOL(_)” or “VOL(+)”keys. The OSD color will change for red.Press “0” To memorize the adjustment.
CHK3 MODE - PINCUSHION ADJUSTMENTSOn CHK3 mode it is possible to adjust the items of the table shown here.Note:To select an item, type “4” to move forward and “3” to move back.After having selected the desired option, adjust it by pressing the “VOL(_)” or“VOL(+)” keys. The OSD color will change for red.Press “0” To memorize the adjustment.
CHK4 MODE - WHITE BALANCE ADJUSTMENTSOn CHK4 mode it is possible to adjust the items of the table shown here.Note:To select an item, type “4” to move forward and “3” to move back.After having selected the desired option, adjust it by pressing the “VOL(_)” or“VOL(+)” keys. The OSD color will change for red.Press “0” To memorize the adjustment.
To execute all these electrical adjustments, the following equipment are required:• Dual-Trace Oscilloscope
Voltage Range: 0.001 V to 50 V/Div.Frequency Range: DC to 50 MHzProbes: 10:1, 1:1
• NTSC Video Pattern Generator• DVM (Digital Volt Meter)• MTS/SAP Signal Generator• (TV Multi-Channel Sound Modulator (U.S.A.))• Plastic Tip Driver and Non-Metal Driver• Isolation Transformer (Variable)• Degaussing Coil• White Pattern Generator• Audio Generator
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TC-21FJ30LA
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
2- VIF DETECTOR OUTPUT LEVEL
CONFIRMATION
CONFIRMATION:
1. Install the chassis in the VIF calibration JIG and tune in a63 dBU colorbar pattern (75Ω opened).
2. Connect the oscilloscope in TPA31.3. Confirm that the output video sign is 1.05 ± 0.15 Vp-p in
TPA 31.
3- BUZZING CONFIRMATION
(AUDIO CIRCUIT)
1. Connect the oscilloscope with a 7kHz filter between A22-2 and A22-3 speakers terminals .
2. Adjust the sound to maximum.3. Adjust AVL: OFF
CONFIRMATION:
1. Supply a colorbar signal with local frequency adjustedand the AFC ON (Channel with sound bearer and withoutmodulation).
2. Assure that the width in the buzzing waveform is smallerthan 500 m Vp-p.
1- RF AGC ADJUSTMENT
1. Supply a color bar pattern and adjust the RF input signalof 69 dB µV (75Ω opened channel 07 RF freq.: 175.25MHz).
2. Connect the digital multimeter in TPA15.
ADJUSTMENT:
1. Select “RF AGC” on “CHK2” service mode.2. Adjust "RF AGC" by pressing VOL(+) or (-) until obtaining
2.2±0.1V in TPA15.3. Increase the input level by +2 dB and confirm that the
voltage decreases in TPA15.
CONFIRMATION
1. Connect a voltage meter between TPA10 and ground.Confirm that the voltage +B is within a range of 140.5V±1.5V
2. Connect a high frequency voltage meter (VRMS) amongthe heater, and confirm that the voltage is 6,30±0,24Vrms
3. Connect the high voltage meter in the CRT anode pin,and confirm that the high voltage is within 30,5KV~27,6KVrange.
4- ANODE AND HEATER VOLTAGE CONFIRMATION
1. Supply a crosshatch signal.2. Adjust the current beam to zero. (0 beam).3. Adjust “SCREEN VR” and “CONTRAST” to minimum.
Nota:(When using a high voltage meter resistive type, it isnecessary to use an electrostatic meter type to verify thevalues)
smaller than500 m Vp-p
- 12 -
TC-21FJ30LA
ADJUSTMENTS
5- PAL COLOR OUTPUT SIGNAL ADJUSTMENT
1. Supply a color bar signal and adjust the local frequency.2. Adjust “IMAGE” to DYNAMIC NORMAL, “CONTRAST” to
63 and “SUB-CONTRAST” to 21.3. Adjust the “CHANNEL COLOR” level to NORMAL.4. Set to CHK2 service mode option, press “5” on the remote
control unit and confirm that OSD becomes blue (AKBturned off).
5. Set ABL to OFF (in CHK2 mode, to access BRT, CONT,S-CONT or S-TINT).
6. Adjust [A] for 2.3 ± 0.2V through the BRIGHT controlvariation in the test point TPL2.
7. Confirm that the RGB Contrast is 11DAC and 352 = 1B
8. Fix G-DRIVE GAIN, R-DRIVE GAIN and B-DRIVE GAINdata in 1FH or 31 DAC.
R-DRIVE GAIN: [SLV(8A), SUB (16)]G-DRIVE GAIN: [SLV(8A), SUB (17)]B-DRIVE GAIN: [SLV(8A), SUB (18)]
CALIBRATION:
1. Connect the oscilloscope in TPL2 (G-OUT) with a 10KΩresistor and adjust “CONTRAST”, so that the [B] waveformit is 2.3±0.1V with 14” CRT and 2.6±0.1V with 20” CRT.
2. Adjust “SUB-COLOR” to obtain 2,45±0.1V in [D]according to fig. 1.
3. Connect the oscilloscope in TPL1 (R-OUT) with a 10KΩresistor and confirm that the [C] waveform it is 2.45±0.1Vaccording to fig. 2.
4. Press the key “5” (AKB ON) and confirm that OSDbecomes white.
Fig. 1
A = 2.3 ±0.1Vo-p
B = 2.4±0.1V
D = 2.45±0.1V
Fig. 2
A = 2.3 ±0.2Vo-p
C = 2.45±0.1V
6- NTSC SUB-TINT CALIBRATION
1. Connect the oscilloscope in TPL1 (R-OUT) with a 10KΩresistor.
2. Supply a Rainbow signal (NTSC 3.58 MHz) throughVIDEO IN.
3. Select “IMAGE” to DYNAMIC NORMAL.4. Select “COLOR FOR CHANNEL” to NORMAL.5. On CHK2 service mode, press “5” (AKB OFF) and confirm
that OSD becomes blue (AKB turned off).6. Set ABL to OFF (on CHK2 mode, to access BRT, CONT,
S-CONT or S-TINT).
CALIBRATION:
1. Adjust [C] for 5.0±0.2V through the BRIGHT controlvariation (CHK2) according to fig. 1.
2. Adjust SUB TINT-NTSC so that the levels of positions 2, 3and 4 of Fig. 1 in accordance with the Fig. 2.
3. Set ABL to ON.4. Press “5” and confirm that OSD becomes white (AKB
turned on).
Fig. 1 Fig. 2
7- PROTECTION CIRCUIT (SHUTDOWN)CONFIRMATION OF OPERATION
1. Supply a crosshatch pattern signal and adjust theCONTRAST and BRIGHT DAC controls to minimum.(Ibeam=0 µA)
CONFIRMATION:
1. Connect the voltmeter in TPA22 and confirm that thevoltage is smaller than 18,7 V.
2. Connect a DC source in TPA22 and confirm that theprotection circuit doesn't act when the voltage is 19,5V.
3. Confirm that the protection circuit acts with smaller voltagethan21,5V.
ITEM / PREPARATION PROCEDURE
- 13 -
TC-21FJ30LA
ADJUSTMENTS
Fig. 11 2 3 3 2 1
Fig. 2
9- FOCUS CALIBRATION
• Assure that the SUB-BRIGHTNESS adjustment has beendone.
1. Supply a Philips or monoscope pattern signal.2. Adjust IMAGE MENU to DYNAMIC NORMAL.
CALIBRATION:
1. Adjust the FOCUS variable resistor for the point of betteradjustment.
• with PHILIPS signal .... take as reference for adjustmentthe third vertical line (fig. 1).
• with MONOSCOPE signal in the number 4 (fig.2).
8- SUB-BRIGHT AND SUB-CONTRASTCALIBRATION
1. Supply a WINDOW pattern signal.2. Adjust IMAGE MENU to DYNAMIC NORMAL
SUB-BRIGHT CALIBRATION
1. Position the color analyzer in the LOW LIGHT imagearea.
2. Ajust S-BRT <CHK 4> control, so that it is Y=0,7±0.2.
SUB-CONTRAST CALIBRATION
1. Position the color analyzer in the HIGH LIGHT imagearea.
2. Ajust S-CONT <CHK 4> DAC control, so that it isY=230±20.
3. If impossible to obtain that adjustment, adjust SUB-CONT <CHK 4> again.
4. Check the SUB-BRIGHT adjust.
10- PURITY CALIBRATION
1. Adjust the HELMHOLTZ device for the local magnetic field(HORIZONTAL: 0 ± 0.03 X 10-4T)
2. Let the set warm up (aging time) for a minimum of 60minutes.
3. Supply a purity pattern (white pattern).
4. Adjust CONTRAST and BRIGHT to MAXIMUM.
5. The static convergence adjustment must have beenmade preliminarily.
6. Connect a DC ampere meter between FBT pin11 (-) andFBT pin3 (+), and adjust to 1200mA±10%, varying the S-BRT DAC control.
CALIBRATION:
1. Position the “ears” of the purity magnets both upward.
2. Adjust the purity until the markers in the purity jigmonitorscope becomes symmetrical in the horizontaldirection.
3. The vertical centralization correction is made throughthe purity magnets for stripe CRT type only.
4. Slide the yoke forward by 10 mm±5 in the monitor. Then,tighten the deflection yoke.
5. Repeat the procedures 2 ~ 4.
6. Press the belt of deflection yoke.
7. Adjust “beam landing” using a microscope. (for modelchange or instrument check only)
4
ITEM / PREPARATION PROCEDURE
- 14 -
TC-21FJ30LA
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
11- WHITE QUALITY CALIBRATION
PREPARATION:
1. Adjust the HELMHOLTZ device to local magnetic field. Ho-rizontal: 0 ± 0.003 x 10-4T
2. Receive a white purity pattern.
3. Adjust CONTRAST and BRIGHT controls to maximum.
4. Previously adjust the CONVERGENCE.
5. Fully degauss the CRT by using an external degaussingcoil.
CALIBRATION:
1. Adjust the magnetic field in 0.4x10-4T (400 mG), andcheck the white quality with the CRT turned to EAST andto WEST.
2. Receive a red pattern, adjust the COLOR control tomaximum and confirm the purity adjustment.
3. If purity error is found at the CRT corners, apply magnetictapes to correct it, fully degauss the CRT again and repeatthe steps 1 and 2. Don't use this magnetic tapes on theinternal side of the yoke.
4. Receive a white purity pattern, adjust the COLOR controlto minimum and confirm the purity adjustment.
12- CONVERGENCE CALIBRATION
1. Adjust the HELMHOLTZ device to local magnetic field.
2. Receive a crosshatch pattern.
3. Adjust IMAGE menu to DINÂMIC NORMAL and the DACBRIGHT control for the crosshatch pattern to be gray.
4. Remove the DY wedges and slightly tilt the deflectionyoke to the vertically and horizontally to obtain the goodoverall convergence.
5. If purity error is found, repeat “Color Purity” adjustment
CALIBRATION
Static convergence calibration
l) Assure that the magnets are positioned according toillustration 1.
ll) Adjust the 4 poles magnets to align the R and BCENTRAL DOTS and adjust the 6 poles magnets toalign both DOTS with G.
lll) After adjustment above, assure that the magnets aresealed, through the application of white glue.
Note:
The electron beams are moved rotationally when thestatic convergence magnets are rotated.
The reduction of rotational beams differ depending ofthe two magnets angle. Therefore, it is necessary torepeat the magnets calibrations sometimes, untilobtaining a good alignment.
13- CRT CUT OFF CALIBRATION1. Supply a WINDOWS signal.
2. Position DACs with the data below:
BRT —> 50H
S-BRT —> 31H
RGB CONTRAST —> 11DAC
SUB-CONTRAST —> 21H
R,G,B DRIVE —> 31H
R,G CUT —> 31H
CALIBRATION:1. Press “5” (AKB OFF) and confirm that OSD becomes
blue.
2. Connect the oscilloscope in TPL5 and adjust BRT toobtain 130V as in the Fig. 1 below.
3. Adjust the SCREEN to obtain a horizontal fine line in thescreen center.
Y = 1.0 +1.0 -0.5
4. Press “5” (AKB ON) and confirm that OSD becomeswhite.
2. Adjust V-AMP-50Hz (CHK3) so that the Philips pattern’scircle height be the same dimension of the width.
7) VERTICAL HEIGHT (V-AMP 60HZ) CALIBRATION1. Supply a MONOSCOPE signal.
2. Adjust V-AMP-60Hz (CHK3) according to box.
3. MEMORIZE in EEPROM.
Fig. 1
Fig. 2
15- WHITE BALANCE CALIBRATION
1. Adjust the HELMHOLTZ device to local magnetic field.2. Let the set warm up for a minimum of 30 minutes.3. Receive a white balance. (This sign should contain
burst sign).4. Adjust the IMAGE menu to DINÂMIC NORMAL.5. Fully degauss the CRT by using an external degaussing
coil.6. Position the color analyzer in contact with the CRT face.
CALIBRATION:
[1] LOW LIGHT CALIBRATION
1. Adjust S-BRT, so that Y = 7
2. Adjust R-CUT OFF, so that x = 0.273 ±0.01
3. Adjust G-CUT OFF, so that y = 0,283 ±0.01
[2] HIGH LIGHT CALIBRATION
(Confirm that G-DRIVE is 31 DAC)
1. Adjust S-BRT, so that Y = 150
2. Adjust R-DRIVE, so that x = 0,275 ±0.01
3. Adjust B-DRIVE, so that y = 0,284 ±0.01
[3] Repeat the procedures [1] and [2].
Assure that not entering light for the meter borders and that the CUT OFF voltage calibration has been done. If the value in thecolor analyzer is below 150, adjust CONTRAST to 50 and press “8” in CHK2 mode.