Aiwa TV-SE141 Service Manual
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Aiwa TV-SE141 Service Manual

Aiwa TV-SE141 Service Manual

Color television
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TV-SE141
K, EH

SERVICE MANUAL

COLOR TELEVISION
• This Service Manual contains the additional information "NOTICES BEFORE
REPAIRING", "DISASSEMBLY INSTRUCTIONS" and "ADJUSTMENT" for the
model TV-SE141 (K,EH).
If requiring the other information, see Service Manual of TV-SE141<K>,
(S/M Code No. 09-003-416-3R1) and TV-SE141<EH>, (S/M Code No.
09-006-416-3R2).
S/M Code No. 09-007-416-3S1

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Summary of Contents for Aiwa TV-SE141

  • Page 1: Service Manual

    • This Service Manual contains the additional information “NOTICES BEFORE REPAIRING”, “DISASSEMBLY INSTRUCTIONS” and “ADJUSTMENT” for the model TV-SE141 (K,EH). If requiring the other information, see Service Manual of TV-SE141<K>, (S/M Code No. 09-003-416-3R1) and TV-SE141<EH>, (S/M Code No. 09-006-416-3R2).

  • Page 2: Notices Before Repairing

    NOTICES BEFORE REPAIRING To make the best use of this equipment, make sure to obey the following items when repairing (or mending). 1. Do not damage or melt the tunicate of the leading Insulation resistance: 6 to10 MΩ (500 V/s) wire on the AC1 side, including the power supply Voltage-withstand: 1 kV for 1 min cord.

  • Page 3: Rear Cabinet Removal

    DISASSEMBLY INSTRUCTIONS 1. REAR CABINET REMOVAL (1) Remove four screws 1 and three screws 2 , then remove the rear cabinet in the direction of the arrow. Front cabinet (See Figure1-1) Rear cabinet Figure 1-1 2. HIGH-VOLTAGE CAP (ANODE CAP) REMOVAL 2-1.
  • Page 4 (5) Push the anode cap with your thumb in the direction of arrow 1 as shown in the figure, then lift the cap in the direction of arrow 2 to release the hook on one side. (See Figure 2-3) Anode cap Hook Hook Figure 2-3...
  • Page 5 (3) Eliminate twisting, etc. of the high-voltage cable and arrange it so that no twisting occurs. (See Figure 3-3) High-voltage cable Anode cap Caution : If the cable is not arranged correctly, the anode cap could turn and cause an installation defect. Figure 3-3 (4) Turn over the rubber cap symmetrically on the left and right.
  • Page 6 (6) Apply the hook on one side to the anode button as shown on the figure. (See Figure 3-6) Caution : Check that the hook is held securely. (7) Apply the hook on the other side to the anode button as shown in Figure 3-7.
  • Page 7 4. NK C.B. (PWB, NK) REMOVAL (1) Disconnect CN903 (CRT GND). Front cabinet (2) Disconnect PN551, PN552 (3) Remove the NK C.B. in the direction of arrow 1. (See Figure 4-1) CN802 (Power Cord) 5. MAIN C.B (PWB, MAIN) REMOVAL CN801 (1) Remove connector (CN480).

  • Page 8: Set-Up For Adjustment

    ADJUSTMENT Set-Up For Adjustment 1. CRT Adjustment Because the video signal output from a pattern generator is used as 1-1. Precautions the adjustment signal input during adjustment, the video signal (1) Receive the white raster signal, and then perform aging for at output from the pattern generator must conform with the least 20 minutes.
  • Page 9 (2) Beam convergence adjustment (4-pole magnet) (3) Beam convergence adjustment (6-pole magnet) With a 4-pole magnet align the G beam with the already aligned Align the R beam with the B beam. The G beam does not R/B beam. move with this adjustment. (magenta) (magenta) (white)
  • Page 10 1-3. Beam Landing Adjustment (1) Receive the green raster signal from the pattern generator. As there is occurrence of convergence distortion after (2) Loosen the magnet lock screw, and shift the magnet assembly completing the landing adjustments, be sure to carry out backward (toward the neck).
  • Page 11 1-4. Beam Center Convergence Adjustment 1-5. The Surrounding Convergence Adjustment Perform this adjustment after completion of adjustment 1-4. Make adjustments on the convergence with 4-pole and 6-pole magnets. Operate each magnet in relation to the electron beam as (1) Shake the deflecting yoke up, down to the right and left, and shown in Figs.
  • Page 12 (Fig. 1) 2. Use the volume keys on the jig remote controller and choose the numbers for “aa”, “bb” and “ccc” (Fig. 1) base on the model and type (Fig.2) TV-SE141 EH LE – – Contents of Aging Mode : 126 126 –...
  • Page 13 3. Display of “CRT ON” accumulated hours The CRT usage time is accumulated on an hourly basis and is displayed in hexadecimal figures. Sample calculation of displayed hexadecimal figures : HEX 1 2 3 4 • The display will be reset to 0000H when the accumulated hours exceed 7FFFH(32768 hours).
  • Page 14 The menus from No.0 to 101 inclusive of PAGE 1 to 3 serve as the “Adjustment Menu” . (Refer to the following tables) Reference Reference Reference No . Menus No . Menus No . Menus Values Values Values CONT BRIGHT STEP H OUT STOP –...
  • Page 15 These initial figures are only for reference purposes and meant for rough adjustment. • Check the condition and adjust the area where the general repair is carried out. Sample Indication for Adjustment Menu No. TV-SE141 Initial Figures PAGE 1 1. H POS 2.
  • Page 16 1-3. OSD H OSD Horizontal Positioning Adjustment Adjustment Menu No. 16 (Page 1-4) Input signal : Crosshatch Measuring instrument : Pattern generator / PAL • Use the volume keys on the jig remote controller to adjust each A and B positions on both left and right in the equal distance towards the screen edge in the OSD display.

  • Page 17: Drive Adjustment

    PAGE 2 White Balance Adjustment : Adjustment Menu No. 19-24 (PAGE 2 - 1 to 2 - 5) *User’s picture quality will be cleared when the adjustment menu screen appears. Input signal : White raster Contents of adjustment : 1. R CUT OFF Contents of Adjustment : 2.
  • Page 18 PAGE 3 3-1. SECAM B - Y SECAM Video, Chroma Adjustment Adjustment Menu No. 25 (Page 3-1) Input signal : Black signal Measuring instrument : Oscilloscope Measuring instrument : Pattern generator / SECAM Test point : IC301 ) PIN B-OUT 1.
  • Page 19 3-5. V SIZE Vertical Size Adjustment Adjustment Menu No. 29 (Page 3-5) Input signal : Crosshatch Measuring instrument : Pattern generator / PAL • Use the volume keys on the jig remote controller and adjust A to position the dot mark in the center to the exact vertical centre of the crosshatch pattern on the screen and regularize the squares of the crosshatch pattern.

  • Page 20: Tuner Adjustment

    Tuner Adjustment : Perform the following adjustment in case of replacing any adjustment element during the repair. Proceed with the following adjustment as well as in the adjustment menu screen. If those adjustments are not completed for both sides, the required adjustment will not be registered even though the adjustment has been processed in the adjustment menu screen.
  • Page 21 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 9820543 0251431 Printed in Singapore...

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