ORDER No. 04-SM-001

Service Manual

Colour Television

TX-32PM1 TX-28PM1

GP4 Chassis

SPECIFICATIONS
(Information in brackets [ ] refers to model TX-28PM1) AV2 IN Power Source: Power Consumption: Stand-by Power Consumption: Aerial Impedance: Receiving System: 220-240V a.c., 50Hz 86W [78W] AV2 OUT Video (21 pin) Audio (21 pin) S-Video IN (21-pin) Video (21 pin) Audio (21 pin) S-Video IN (4-pin) Audio (RCAx2) Video (RCAx1) 1V p-p 75 500mV rms 10k Y: 1V p-p 75 C:0,3V p-p 75 1V p-p 75 500mV rms 1k Y: 1V p-p 75 C:0,3V p-p 75 500mV rms 10k 1V p-p 75
1,3W 75 unbalanced, Coaxial Type

AV3 IN

PAL-I, PAL-525/60 M.NTSC (AV only) NTSC (AV only) High Voltage: VHF A1-S20 UHF E21-E69 CATV S21-S41 (Hyperband) Picture Tube:
32kV 0,9kV [31kV 1kV] W76EKX50X21 76cm [W66MAF185X03 66cm] 2x7W RMS, 2x15W MPO, 8 impedance 8 Impedance

Receiving Channels:

Intermediate Frequency: Video/Audio Video 38,9MHz Audio 32,9MHz 32,35MHz (NICAM) 34,47MHz

Audio Output:

Headphones: Accessories supplied :
Colour Terminals: AUDIO MONITOR OUT AV1 IN
Remote Control 2 x R6 (UM3) Batteries
Audio (RCAx2) 500mV rms 1k Video (21 pin) Audio (21 pin) RGB (21 pin) Video (21 pin) Audio (21 pin) 1V p-p 75 500mV rms 10k 0,7V p-p 75 1V p-p 75 500mV rms 1k
Dimensions: Height: Width: Depth: Net weight:

566mm 902mm 550mm 56kg

[515mm] [766mm] [529mm] [38kg]

AV1 OUT

Specifications are subject to change without notice. Weights and dimensions shown are approximate.
Panasonic CS ( U.K. ) Ltd. WILLOUGHBY ROAD, BRACKNELL, BERKS., RG12 8FT.

WAVEFORM PATTERN TABLE

CONDITIONS:

Contrast: MAX,

Brightness: MID,

Colour: MID,

Sharpness: MID

ALIGNMENT SETTINGS

(The figures below are nominal and used for representative purposes only.) 1. Set the Bass to maximum position, set the Treble to minimum position, set the Volume to minimum then press the down button (-/v) on the customer controls at the front of the TV and at the same time press the INDEX button on the remote control, this will place the TV into the Service Mode 1. 2. Press the RED / GREEN buttons to step up / down through the functions. 3. Press the YELLOW / BLUE buttons to alter the function values. 4. Press the OK button after each adjustment has been made to store the required values. 5. To exit the Service Mode, press the "N" button. Alignment Function EAROM copy FLASH program copy Horizontal Position Vertical Position Horizontal Amplitude Vert. Amplitude EW-amplitude Lower Corner Trapezium-comp Upper Corner Vertical Linearity Vertical Symmetry Angle Bow Setting indication Note: All setting values are approximate TV/EXT EXT -> TV H-Pos -15 V-Pos 10 H-Amp 85 V-Amp 22 EW-Amp 1 - 20 Lower Corner 5 Trapez 1 -4 Upper Corner 3 V-Lin 24 V-Sym -12 Angle 2 Bow -2 DVCO -1 High Low Sub-Brightness 7 Settings / Special features ----Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Optimum setting. Receive a PAL Colour Bar Pattern. For DVCO alignment press "Blue" button, wait until the figure colour is changed from red to black colour. Optimum setting. Optimum setting.
DVCO Highlight Lowlight Sub-Brightness

Degauss coil

Q841 R825 D825

2 IC802 1

6,5V 10,5V 6

CONTROL BLOCK DIAGRAM

D - BOARD
STV8131 DISABLE Q_SW SERVICE PORT EXP SDA

AUDIO SWITCH SDA

SCL 5 SDA 28

3,REG_ON_OFF 9 DEGAUSS

SDA RM

KEYSCAN

SERVICE/TEST

SCL SDA

AB_PROT1

AGC ST/ON

3,3SCL 3,3SDA
LOCAL KEYS SWITCHING MATRIX
LEVEL SHIFTER Q1110 Q1111

Q857 POWER SUPPLY

51 KEYSCAN

AV LINK OUT

Q1104 Q1105

VPROT FBIN

LED 47 LED

IC1062

AV LINK IN
2 3,3SCL Q1106 QAV_LINKAV_LINK 9 Q_SW 10 SERVICE 12 SDA_SWSDA_SW2

48 GEO

MICROPROCESSOR

REMOTE

52 SLOW SLOW 59 D601

DEGAUSS

SWITCH

IC 1900

GEOMAGNETIC CORRECTION 3,3SDA 3,3SCL XTAL1 RESET XTAL2 VCT_MUTE

14 3,3SDA 15 SCL_SW2

RL801 Q602 X601

6 MUTE

IC2301 IC1103

EAROM SCL_SW1 SDA_SC1

MUTE_MONITOR

LA42072

1 OUT 8 SLOW1
Q2101 HW MUTE Generating unit Q2301 Q2303

8 SLOW2

10 AV LINK2

16 FBIN

10 SCL_SW2

12 SDA_SW2

DEFLECTION BLOCK DIAGRAM

D - BOARD D1 T551

G - BOARD G1

Q1900 6

G9 IC1900

ROTATION COIL

DIODE MODULATOR

61 Q704 Q701

DEFLECTION

VPROT 59