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Specifications
Power Source :
Power Consumption :
Aerial Impedance :
Receiving System :
Receiving Channels :
VHF
UHF
CATV
Audio Terminal :
DVD
AC SINGLE 220-240V, 50/60 Hz
75Ω unbalanced
Coaxial type
17 Systems
2-12 PAL / SECAM B,K1
0-12 PAL B (N ZEALAND)
1-9 PAL B (N ZEALAND)
1-12 PAL / SECAM D
1-12 NTSC M (JAPAN)
2-13 NTSC M (U.S.A)
21-69 PAL G,H,I / SECAM G.K.KI
28-69 PAL B (Australia)
13-57 PAL D,K
13-62 NTSC M (JAPAN)
14-69 NTSC M (U.S.A)
S1-S20 (OSCAR)
1-125 (U.S.A CATV)
C13-C49 (JAPAN)
Z1-Z37 (CHINA)
5A,9A (AUSTRALIA)
S21-S41 (HYPER)
TX-21GX20R-IRAN
GL1 Chassis
58W
AV 1, 2
Monitor Out
Video Out
Audio Out
High Voltage :
Picture Tube :
Audio Output :
Dimensions :
Mass :
Specifications are subject to change without notice.
Mass and dimensions shown are approximate.
© 2007 Matsushita Electric Industrial Co., Ltd. All
rights
distribution is a violation of law.
ORDER NO. MTV0701520CE
Colour Television
Y
PB
PR
Video In
1 Vp-p, 75Ω
Audio In
Approx. 0.5V, 47kΩ
reserved.
Unauthorized
1.0 Vp-p, 75Ω
0.7 Vp-p, 75Ω
0.7 Vp-p, 75Ω
1 Vp-p, 75Ω
Approx. 0.5V, 1kΩ
27.5kV ±1.5
at zero beam current
A51LYZ395X62
50.5cm (21 inches)
Measured diagonally,
90° deflection
5W + 5w = 10W
Height : 472 mm
Width : 598 mm
Depth : 479 mm
23 kg (Net Wt.)
copying
and

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Summary of Contents for Panasonic TX-21GX20R-IRAN

  • Page 1 ORDER NO. MTV0701520CE Colour Television TX-21GX20R-IRAN GL1 Chassis Specifications Power Source : AC SINGLE 220-240V, 50/60 Hz 1.0 Vp-p, 75Ω Power Consumption : 0.7 Vp-p, 75Ω Aerial Impedance : 75Ω unbalanced 0.7 Vp-p, 75Ω Coaxial type AV 1, 2 Receiving System :...
  • Page 2: Table Of Contents

    TX-21GX20R-IRAN CONTENTS Page Page 1 Safety Precautions 2.4. Adjustment for CRT CUT OFF 1.1. General Guide Lines 2.5. Adjustment Procedure 1.2. Leakage Current Cold Check 2.6. Adjustment 1.3. Leakage Current Hot Check (Fig. 1) 3 Conductor Views 1.4. X-Radiation 4 Schematic Diagram 1.5.
  • Page 3: Safety Precautions

    TX-21GX20R-IRAN 1 Safety Precautions 1.1. General Guide Lines 1. It is advisable to insert an isolation transformer in the AC supply before servicing this hot chassis. 2. When servicing, observe the original lead dress, especially the lead dress in the high voltage circuits. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.
  • Page 4: Gl1 Chassis Block Diagram

    TX-21GX20R-IRAN 1.5. GL1 Chassis Block Diagram...
  • Page 5: Service Hints

    TX-21GX20R-IRAN 2 Service Hints 2.1. Service Position for E-Board 1. Remove the back cover. 2. Stand the TV set as shown in Fig. 2. 3. Remove the A-Board from the TV set by pulling the main board out as shown in Figure 2.
  • Page 6 TX-21GX20R-IRAN d. After selecting the required option mode press Vol up / Vol down to adjust correct option. OSD will change to RED colour. Press digit “0” to memorize data. e. CHK2 Press digit key “2” to move forward to CHK2.
  • Page 7 TX-21GX20R-IRAN j. Press digit key “4” to move forward from V-SLOPE ------> V-SHIFT Press digit key “3” to move backward from V-SHIFT ------> V-SLOPE k. Press volume up / volume down to adjust required setting. l. CHK4 Press digit key “2” to move forward to CHK 4.
  • Page 8: Adjustment For White Balance

    TX-21GX20R-IRAN 2.3. Adjustment for White Balance Preparation: 1. Receive the white balance pattern and aging should have been performed over 30 minutes. 2. Set the picture menu to DYNAMIC NORMAL. 3. Degausse the CRT face. 4. Fix the CRT colour analyzer receiver unit to CRT face.
  • Page 9: Adjustment Procedure

    TX-21GX20R-IRAN 2.5. Adjustment Procedure 2.5.1. +B Voltage Item / preparation 1. Operate the TV set. 2. Set control as follows : Brightness ... minimum Contrast ....minimum Adjustment procedure 1. Confirm the DC voltage at the indicated test points, as follows : TPA 114 : 1.8 ±...
  • Page 10: Adjustment

    TX-21GX20R-IRAN 2.6. Adjustment Before Colour Purity, Convergence and White Balance adjustment are attempted, V. Height, H. Centre and Focus adjustments must be completed. Colour Purity Convergence 1. Set the Brightness and Contrast controls to their maximum 1. Apply a crosshatch pattern signal and Normalize Contrast positions.
  • Page 11 TX-21GX20R-IRAN Adjustment of CRT VRS 1. Preparation a. Set DY to CRT not to tilt up and down left and right deflection. b. Set CY to CRT and set CY magnet primarily (Fig. 1) Purity magnet : Set purity magnet that 2 magnets are (TOP POSITION) VRS magnet : Set purity magnet 2 magnets are (HORIZONTAL POSITION) 2.
  • Page 12 TX-21GX20R-IRAN Fig. 10 Fig. 11 Notes: 1. Wedge A, B and C should be inserted following the sequence of 1, 2 and 3 shown in Fig. 11. 2. The wedges should be set 120° apart from each other. 3. Be certain that three wedges are firmly fixed and the Deflection Yoke is tightly clamped in place.
  • Page 13: Conductor Views

    TX-21GX20R-IRAN 3 Conductor Views...
  • Page 14: Schematic Diagram

    TX-21GX20R-IRAN 4 Schematic Diagram...
  • Page 15 TX-21GX20R-IRAN...
  • Page 16: A Board

    TX-21GX20R-IRAN 4.1. A Board 4.1.1. A Board (1/5) <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A>...
  • Page 17 TX-21GX20R-IRAN 4.1.2. A Board (2/5) <1A> <1B> <2A> <2B> <3B> <4B> <3A> <4A> <5B> <6B> <5A> <7B> <6A> <8B> <7A> <8A> <9A> <9B>...
  • Page 18 TX-21GX20R-IRAN 4.1.3. A Board (3/5) <1B> <1C> <2C> <2B> <3B> <3C> <4B> <4C> <5C> <5B> <6B> <6C> <7B> <7C> <8B> <8C> <9B> <9C>...
  • Page 19 TX-21GX20R-IRAN 4.1.4. A Board (4/5) <1C> <1D> <2C> <2D> <3C> <3D> <4D> <4C> <5D> <5C> <6D> <6C> <7D> <7C> <8D> <8C> <9D> <9C>...
  • Page 20 TX-21GX20R-IRAN 4.1.5. A Board (5/5) <1D> <2D> <3D> <4D> <5D> <6D> <7D> <8D> <9D>...
  • Page 21: L Board

    TX-21GX20R-IRAN 4.2. L Board 4.2.1. L Board (1/3) <1A> <2A> <3A> <4A> <5A>...
  • Page 22 TX-21GX20R-IRAN 4.2.2. L Board (2/3) <1A> <1B> <2A> <3A> <4A> <2B> <3B> <4B> <5B> <5A> <6B>...
  • Page 23 TX-21GX20R-IRAN 4.2.3. L Board (3/3) <1B> <2B> <3B> <4B> <5B> <6B>...
  • Page 24: Parts Locations

    TX-21GX20R-IRAN 5 Parts Locations...
  • Page 25: Replacement Parts List

    TX-21GX20R-IRAN 6 Replacement Parts List...
  • Page 26: Replacement Parts List

    TX-21GX20R-IRAN 6.1. Replacement Parts List Ref. Part No. Part Name & Description Remarks C503 F1B2H821A025 C 820PF, 500V Ref. Part No. Part Name & Description Remarks C504 ECJ1VB1H681K C 680PF, K, 50V C506 F1A2H1000002 C 10PF, 500V A51LYZ395X62 C511 ECA1VM101B...
  • Page 27 TX-21GX20R-IRAN Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C830 F0A1H182A040 P 1800PF, 50V D864 B0BA03300030 DIODE C840 F1A2E102A001 C 1000PF, M, D865 B0BA3R500008 DIODE C841 ECKW3D151KBR C 150PF, K, 2KV D872...
  • Page 28 TX-21GX20R-IRAN Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R006 ERJ3GEYJ273 M 27KOHM,J,1/16W R351 ERJ6ENF1001 M 1KOHM, 1/10W R007 ERJ3GEYJ392 M 3.9KOHM,J,1/16W R352 ERJ6ENF1001 M 1KOHM, 1/10W R008 ERJ3GEYJ681 M 680OHM,J,1/16W R353...
  • Page 29 TX-21GX20R-IRAN Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R663 ERJ3GEYJ121 M 120OHM,J,1/16W JSA3133 ERJ3GEY0R00 M 0OHM,J,1/16W R664 ERJ3GEYJ332 M 3.3KOHM,J,1/16W JSA3136 ERJ3GEY0R00 M 0OHM,J,1/16W R665 ERJ3GEY0R00 M 0OHM,J,1/16W JSA3141 ERJ3GEY0R00 M 0OHM,J,1/16W...

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