Aiwa TV-C1421 Service Manual
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Aiwa TV-C1421 Service Manual

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SERVICE MANUAL
COLOR TELEVISION
• This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
of TV-C1421 (KE, KER) and TV-C1422 (SHR), (S/M Code No. 09-01A-447-4T1).
TV-C1421
TV-C1422
S/M Code No. 09-01A-447-4R1
KE, KER
SHR

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Summary of Contents for Aiwa TV-C1421

  • Page 1 TV-C1421 KE, KER TV-C1422 SERVICE MANUAL COLOR TELEVISION • This Service Manual is the "Revision Publishing" and replaces "Simple Manual" of TV-C1421 (KE, KER) and TV-C1422 (SHR), (S/M Code No. 09-01A-447-4T1). S/M Code No. 09-01A-447-4R1...

  • Page 2: Specifications

    SPECIFICATIONS Tuner System Frequency synthesized tuner TV System PAL (B/G, D/K), SECAM (B/G, D/K, K1)<KER/KE> PAL (B/G, D/K,I), SECAM (B/G, D/K, K1), NTSC (M)<SHR> Video Input Color System PAL, SECAM, NTSC3.58, NTSC4.43 Channel Coverage VHF: E2 to E12, R1 to R12 UHF: 21 to 69 CATV: S1 to S41 Program Memory...
  • Page 3 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: 7 to 9.5 MΩ (500 V/s) wire on the AC1 side, including the power supply Voltage-withstand: 3 kV for 1 minute cord.

  • Page 4: Rear Cabinet Removal

    DISASSEMBLY INSTRUCTIONS 1. REAR CABINET REMOVAL Front cabinet (1) Remove four screws 1 and three screws 2 , then remove the rear cabinet in the direction of the arrow. (See Figure1-1) Rear cabinet Figure 1-1 2. HIGH-VOLTAGE CAP (ANODE CAP) REMOVAL 2-1.
  • Page 5 (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 6 (3) Eliminate twisting, etc. of the high-voltage cable and High-voltage cable Anode cap arrange it so that no twisting occurs. (See Figure 3-3) 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 7 (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 Hook shown in Figure 3-7.
  • Page 8 4. NK C.B REMOVAL (1) Disconnect CN903 (CRT GND), CN904 (SCREEN). Front cabinet (2) Remove the NK C.B in the direction of arrow 1 . (See Figure 4-1) 5. MAIN C.B REMOVAL CN802 (Power cord) (1) Remove connector (CN401). (2) Remove connector (CN802). CN801 (3) Remove connector (CN801).

  • Page 9: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C315 87-012-282-080 C-CAP, U 4700P-50 C316 87-012-273-080 C-CAP,U 820P-50 K B 87-A22-102-040 C-IC,M24C04-WMN6T C317 87-010-831-080 C-CAP,U,0.1-16F Z F 87-A91-538-010 RCR UNIT,SBX1981-72P C318 87-012-286-080 C-CAP, U 0.01-25 87-A21-979-010 IC,TDA9381PS C319...
  • Page 10 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C849 87-A12-062-080 CAP,E 100-10 SMG R510 87-A01-104-090 RES,M/F 390-1W J RSS1X C853 87-A12-062-080 CAP,E 100-10 SMG R620 87-A00-225-090 RES,M/F 2.2K-5W J RSV5 C870 87-010-831-080 C-CAP,U,0.1-16F R802 87-A00-552-010 RES,CEM 1.0-10W J MPC722 CF702 87-008-577-080 FLTR,TPS5.5MB2...

  • Page 11: Transistor Illustration

    CHIP RESISTOR PART CODE Chip Resistor Part Coding Figure Resistor Code Value of resistor Chip resistor Dimensions (mm) Symbol Wattage Type Tolerance Resistor Code Form 1/16W 1005 0.35 1/16W 1608 0.45 1/10W 2125 1.25 0.45 1/8W 3216 0.55 TRANSISTOR ILLUSTRATION E C B B C E E C B...
  • Page 12 WIRING – 1 (MAIN) – 12 –...
  • Page 13 WIRING – 2 (NK) – 13 –...
  • Page 14 SCHEMATIC DIAGRAM (MAIN / NK) – 14 –...
  • Page 15 IC BLOCK DIAGRAM – 15 –...
  • Page 16 IC DESCRIPTION IC, TDA9381PS Pin No. Pin Name Description POWER On/stand-by control output. SCL0 C-bus serial clock output. SDA0 C-bus serial data input/output. M/I/BG Tuner system control output. – Not connected. KEY-IN Front key scan input. SEL1 – Select 1 (signal select). SEL2 –...
  • Page 17 Pin No. Pin Name Description CHROMA Chroma input. AUDIO-OUT Audio output. S/SW Insertion switch input (GND). External input Red/V. External input Green/Y. External input Blue/U. Beam current limiter input. IBLACK Black current input/vertical guard. R-OUT Red output. G-OUT Green output. B-OUT Blue output.
  • Page 18 WAVEFORM IC301 PIN 16: PHI-2 IC301 PIN 28: AU-DEEM 100 mV/div 1 V/div 50 µs/div 10ms/div IC301 PIN 21: V-DR+ IC301 PIN 33: HOUT 200 mV/div 1 V/div 10 ms/div 50µs/div IC301 PIN 22: V-DR– IC301 PIN 34: SAND 200 mV/div 2V/div 10 ms/div 50µs/div...
  • Page 19 IC301 PIN 38: IF VOUT IC801 PIN 3: CTRL 500 mV/div 500 mV/div 20 µs/div 5 µs/div IC301 PIN 40: CVBS INT IC801 PIN 4: DEMAG 500 mV/div 500 mV/div 20 µs/div 5 µs/div IC301 PIN 42: CVBS/Y IC801 PIN 5: SENCE 500 mV/div 500 mV/div 20 µs/div...
  • Page 20 IC801 PIN 8: DROIN 50 V/div 2 µs/div TUT101 PIN11: IF1 200 mV/div 50 µs/div – 20 –...

  • Page 21: Voltage Chart

    VOLTAGE CHART PIN NO. STANDBY 7.75 4.96 2.72 0.20 3.88 3.98 0.60 0.46 0.66 0.70 1.86 PIN NO. STANDBY 1.86 3.83 3.83 3.91 1.36 3.28 4.92 4.92 2.52 0.45 4.92 4.92 0.61 2.53 0.15 4.92 4.92 0.30 0.10 1.03 3.27 0.47 PIN NO.
  • Page 22 PIN NO. STANDBY PIN NO. STANDBY 3.20 3.20 1.45 1.45 7.71 0.62 1.53 1.53 2.31 0.34 3.32 3.32 1.89 0.15 4.92 4.93 1.89 0.41 4.92 4.93 0.42 0.41 4.90 4.90 7.77 0.63 PIN NO. STANDBY PIN NO. VIDEO 1 VIDEO 2 TUNER 7.70 13.01...
  • Page 23 STANDBY NAME PIN NO. STANDBY Q 501 7.94 7.95 -0.36 0.42 0.51 -0.31 0.31 4.93 4.93 Q 602 PIN NO. STANDBY 68.60 114.50 12.91 0.30 0.10 Q 603 7.94 7.94 0.12 19.68 114.50 STANDBY NAME Q 604 8.40 8.34 4.90 4.92 7.85 7.48...
  • Page 24 STANDBY STANDBY NAME NAME Q 711 (SHR ONLY) Q 803 0.72 7.18 7.87 7.78 0.63 7.81 0.63 3.39 7.94 7.95 Q 712 Q 805 4.77 0.26 3.34 3.34 7.78 0.63 4.13 3.34 3.34 Q 713 Q 839 3.99 0.17 7.78 7.04 5.38 3.39...

  • Page 25: 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 26 (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 27 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 28 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 29: Electrical Adjustment

    ELECTRICAL ADJUSTMENT – 29 –...
  • Page 30 1. Modifying Jig Remote-Controller Activating Servicing Mode Press TEST key once SLEEP KEY Aging mode TEST KEY (hidden key FINISH KEY Press SLEEP key once under the seal) (hidden key under the seal) Adjustment mode 2. Details of Aging Mode Screen a.
  • Page 31 . . . Normal level AFTS curve DN(DOWN) 3. Operating Adjustment Mode MENU 1/12 1.H POS 50 2.VPOS 50 3.VSIZE 50 4.VLIN EA 50 5.OSDH 50 6.OSDV 50 7.V S-CORR 50 8.H SD SOT 9.VSD SOT 2 : VPOS 50 Volume + Volume 2 : VPOS 50...
  • Page 32 4. Checking and Configuring Initial Data <MENU 1> <MENU 4> <MENU 2> <MENU 5> <MENU 3> <MENU 6> – 32 –...
  • Page 33 <MENU 10> <MENU 7> <MENU 8> <MENU 11> 60Hz trapezoid distortion correction 60Hz parallelogram distortion correction 60Hz cupid’s bow distortion correction <MENU 9> <MENU 12> UOC internal AUTO VOLUME LEVEL – 33 –...
  • Page 34 5. List of Electric Adjustment Points (Adjustment Menu Screen) Precautions taken before adjustment 5-1. Adjustment of screen size and screen position (PAL) Fig.1-1 PAL MONO-SCOPE CE NTER Fig.1-2 PAL CONVERGENCE Fig.1-3 PAL MONO-SCOPE – 34 –...
  • Page 35 CRT center and the center of cross hatch are matched. Fig.1-4 PAL CONVERGENCE Fig.1-5 PAL MONO-SCOPE Fig.1-6 PAL CONVERGENCE Fig.1-7 PAL MONO-SCOPE – 35 –...
  • Page 36 Fig.1-8 PAL CONVERGENCE Fig.1-9 PAL CONVERGENCE Fig.1-10 PAL CONVERGENCE 5-2. Adjustment of screen size and screen position (NTSC) Fig.2-1 NTSC MONO-SCOPE – 36 –...
  • Page 37 CENTER Fig.2-2 NTSC CROSS HATCH Fig.2-3 NTSC MONO-SCOPE CRT center and the center of cross hatch are matched Fig.2-4 NTSC CROSS HATCH Fig.2-5 NTSC MONO-SCOPE – 37 –...
  • Page 38 Fig.2-6 NTSC CROSS HATCH Fig.2-7 NTSC MONO-SCOPE Fig.2-8 NTSC CROSS HATCH Fig.2-9 NTSC CROSS HATCH – 38 –...
  • Page 39 Fig.2-10 NTSC CROSS HATCH 5-3. Tuning adjustment 5-4. Adjustment of color and brightness Fig.4-1 Fig.4-2 – 39 –...
  • Page 40 CA-100 SETTING Fig.4-3 Fig.4-4 – 40 –...

  • Page 41: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 1 / 1 WIRE ASSY, CRT GND 14 HLDR,LED TV-C1421 KEJ1C,KERJ74M TV-C1422 SHRJ1C (FileName:TVC1421.EPS) 13/8/20 BJB-P – 41 –...

  • Page 42: Mechanical Parts List

    DESCRIPTION 8B-JBP-005-010 PANEL,MAIN C1421 KE<KERJ74M,KEJ1C> 8B-JBP-004-010 PANEL,MAIN C1422 SH<SHRJ1C> 8Z-JBU-005-010 LENS,RC 8Z-JBU-006-010 LENS,LED 8Z-JBU-004-010 KEY,MAIN 87-B00-033-010 BADGE,AIWA 40 SILVER 8B-JBP-001-010 CABI,FR DC MS328 8Z-JB6-695-010 AC CORD SET,KE BLK<KERJ74M> 8Z-JB4-695-010 AC CORD SET,EH BLK<SHRJ1C,KEJ1C> 8Z-JB7-672-110 SPKR,F 50*120 86-LB7-606-010 CRT,A34AGT13X79N<KERJ74M> 8Z-JB8-635-010 CRT,A34LRQ91X01(VW)<SHRJ1C>...
  • Page 43 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 2000068 9301944 921338 Printed in Singapore...

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