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TC2071M

PANASONIC TC2070M, TC2071M, TC2185TR, TC2091MR Service manual & schematics

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Service Manual Colour Television

TC-2091MR M15L chassis

Specifications

MR

Power Source : Power Consumption :

Aerial Impedance : Receiving System : Receiving Channels :

Intermediate Frequency :

High Voltage :

VHF 2-12 UHF 21-69 Video 38.9 MHz Sound 33.4 MHz Colour 34.47 MHz 24.5 kV at zero beam current

AC 220 - 240 V. 50 Hz

Stand-by condition 7 W

75 unbalanced, Coaxial Type

80 W (Max.)

PAL - B, G

Picture Tube : 5130B22H
5130B22(0)H for S. E. Asia countries
5130B22(S)H for Fiji
51 cm (20 inches) measured diagonally
90° deflection
Audio Output : 2.5 W (Max.)
Speaker : 12 x 5 cm, 8 o, Oval Type
Remote Controller : 25 functions Infrared Controller
Dimensions : Height: 457 mm
Width: 496 mm
Depth: 472 mm
Mass (Weight): 18.0 kg (Net)

Specifications are subject to change without notice. Mass (Weight) and dimensions shown are approximate.

Matsushita Electric Industrial Co., Ltd. Central P. O. Box 288, Osaka 530-91, Japan

Central P. O. Box 288, Osaka 530-91, Japar

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TC-2091MR

BLOCK DIAGRAM FOR INTEGRATED CIRCUIT

ADJUSTMENTS

TC-2091MR

ITEM / PREPARATION ADJUSTMENT PROCEDURE
B VOLTAGE
  1. Operate the TV set.
  2. Set controls :
    Screen ( on FBT ) minimum
    Contrast minimum
    Colour minimum
1. Confirm that the indicated test points for the specified voltage. TPE1: 113 ± 2.0 V Pin 1 of E33: 177 ± 15 V TPE2: 12 ± 1.0 V TPE51: 4.7 ± 0.5 V TPE3: 17 ± 2.0 V TPE52: 5.0 ± 0.5 V TPE4: 25 ± 1.5 V
RF AGC
1. Receive a colour bar pattern. 1. Turn RF AGC control ( R108 ) fully clockwise.
  1. Set the input level to 63 ± 2 dB.
  2. (75 Ω opened )
  1. Slowly turn RF AGC control counterclockwise to set it at the point just before
    voltage at TPE12 drops.
3. Connect an oscilloscope to TPE12 with DC mode. 3. Increase the input level by 2 dB and confirm that the voltage changes.
1. Operate the TV set. 1. Connect a DC voltmeter to TPE1 and confirm the voltage is 113 ± 2.0 V.
2. Set controls : 2. Connect a high voltage meter ( Resistor type ) to an anode of the picture tube.
Screen (on FBT) minimum 3. Confirm that the high voltage is within a range of 24.5 (+1.5, -1.3) kV.
Colour minimum
ITEM / PREPARATION ADJUSTMENT PROCEDURE WAVEFORM
  1. SUB CONTRAST
  2. Receive a colour bar pattern.
  3. Connect an oscilloscope to TPE32.
  4. Connect a short jumper between TPE7
    and TPE52.
  5. Set Colour control to Normal and Con-
    trast control to Max.
  1. Adjust Sub Bright, Screen and Bright
    controls :
    0.5 ± 0.5 V
  2. Adjust Sub Contrast control (R302) :
    3.5 ± 0.1 V
    (Waveform should not be saturated.)
(by BRIGHT & SUB BRIGHT CONTROLS)
Fig. 3
  1. COLOUR PHASE
  2. Receive a colour bar pattern.
  3. Connect an oscilloscope to TPE32.
  4. Connect a short jumper between Pin-8 and Pin-9 of IC601.
  5. Connect a short jumper between Pin-3 of IC601 and TPE52.
  1. Set Colour control to Normal and Contrast
    control to Max.
  2. Adjust APC trimmer (C617) to obtain syn-
    chronous waveform.
Fig. 4
  • DELAY LINE
  • 1. Receive a colour bar pattern.
  • 2. Connect an oscilloscope to TPE32.
  • 3. Set Colour control to Normal and Contrast control to Max.
  1. Adjust the position (A) shown in Fig. 5 to
    zero level by R611.
  2. Minimize the differences (B) shown in Fig. 5
    by L601.
(A) (B)
(B)
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(B)
ITEM / PREPARATION ADJUSTMENT PROCEDURE WAVEFORM
  1. COLOUR OUTPUT
  2. Receive a colour bar pattern.
  3. Connect an oscilloscope to TPE32.
  4. Set Colour control to Normal and Contrast control to Max.
  5. Connect a short jumper between TPE7 and TPE52.
  1. Adjust Sub Bright, Screen and Bright
    controls :
    0.5 ± 0.5 V
  2. Adjust Sub Colour control (R620):
    2.4 ± 0.2 V
  3. Connect the oscilloscope to TPE34.
  4. Confirm that the amplitude of waveform :
    3.5 ± 0.4 V
TPE32
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TC-2091MR TC-2091MR

SCHEMATIC DIAGRAM FOR MODEL TC - 2091MR (M15L CHASSIS)

IMPORTANT SAFETY NOTICE

Components identified by A mark have special characteristics important for safety. When replacing any of these components, use only manufacturer's specified parts.

NOTES :

RESISTOR RESISTOR All resistors are carbon 1/4W resistor, unless marked as follows: Unit of resistance is OHM ΓΩ1 (K=1.000, M=1.000,000). 🕅 : Metal Oxide

☐ : Metal Film

Dipped Tantalum

(Z) : Z - Type

S : Fuse

  • O : Nonfiammable ∆ : Solid
  • 17 : Wire Wound
  • 2. CAPACITOR
    • CAPACITOR All capacitors are ceramic 50V capacitor, unless marked as follows
    • Unit of capacitance is µF, unless otherwise noted. Ø : Temperature Compensation +#-: Electrolytic NPH : Bipolar
    • (M) : Polvester
    • Metalized Polvester
    • ⊠ : Polypropylene
  • 3. COIL
    • Unit of inductance is µH, unless otherwise noted
  • TEST POINT Q : Test Point position VOLTAGE MEASUREMENT VOLTAGE MEASUREMENT Voltage is measured by a DC voltmeter. Conditions of the measurement are the following: .. AC 220 V. 50 Hz Power Source .. Colour Bar signal (RF) Receiving Signal .... Maximum position All customer's controls ... Number in red circle indicates waveform number (See waveform pattern table.) When arrow mark ( 🦯 ) is found, connection is easily found from the direction of arrow.
    • ==== : Indicates the major signal flow.
    • This schematic diagram is the latest at the time of printing and subject to change without notice

WAVEFORM PATTERN TABLE

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