Panasonic CT-32D20B Technical Service Data

Also see for CT32D20B - 32" COLOR TV: Operating manual

Panasonic CT-32D20B Technical Service Data Manual pdf 2 page image

MISCELLANEOUS ADJUSTMENTSPPPPPaaaaaggggge 1e 1e 1e 1e 1 SET 4554SET 4554SET 4554SET 4554SET 4554NOTE: This receiver employs digital customer controls. All adjustments are atnormalized position unless otherwise indicated.B+ CHECKB+ CHECKB+ CHECKB+ CHECKB+ CHECKConnect a digital DC voltmeter to pin 16 (P2) of T801 and the common tie point.Set brightness and picture to minimum. With AC line voltage set to 120VAC, B+should read 130V* ±1.0V*.* Taken from a common tie point.HIGHHIGHHIGHHIGHHIGH VVVVVOLOLOLOLOLTTTTTAAAAAGE CHECKGE CHECKGE CHECKGE CHECKGE CHECKTune in a picture. Set brightness and picture for a black raster. Connect a highvoltage probe to CRT anode. High voltage should read 30kV to 32kV.PURITY CHECKPURITY CHECKPURITY CHECKPURITY CHECKPURITY CHECKPress recall button on transmitter to enter purity check mode.NOTE: Receiver must be in serviceman mode for purity colors to display on screen.Press recall button to cycle through white, red, green, blue, and normal screens.PURITYPURITYPURITYPURITYPURITYEnter serviceman mode. See Purity Check to display a green raster. Loosendeflection yoke and move it back as far as possible. Loosen locking ring and movethe purity tabs to center the vertical green band. Slowly slide the deflection yokeforward until a uniform green screen is obtained.CONVERGENCECONVERGENCECONVERGENCECONVERGENCECONVERGENCEConnect a signal generator to antenna terminal and tune in a dot pattern. Adjust the4-pole magnets to converge the red and blue dots at the center of the screen. Adjustthe 6-pole magnets to converge the red/blue dots over the green dots at the center ofthe screen.NOTE: Spread the two tabs of each set of magnets equally and opposite to convergevertically, and rotate both tabs in the same direction to converge horizontally. Sincethe four and six pole magnets interact, repeat the adjustment until center conver-gence is correct.Tune in a crosshatch pattern. Remove rubber wedges between the deflection yokeand CRT. Tilt deflection yoke up or down to converge the vertical lines at the topand bottom of the screen and the horizontal lines at the left and right sides of thescreen. Tilt the deflection yoke left or right to converge the horizontal lines at thetop and bottom of the screen and the vertical lines at the left and right sides of thescreen. Repeat convergence procedure if necessary to obtain the best overallconvergence. Replace rubber wedges.CRCRCRCRCRT NECK ASSEMBLT NECK ASSEMBLT NECK ASSEMBLT NECK ASSEMBLT NECK ASSEMBLYYYYYENTERING SERENTERING SERENTERING SERENTERING SERENTERING SERVICEMAN MODEVICEMAN MODEVICEMAN MODEVICEMAN MODEVICEMAN MODETurn the receiver on and momentarily short pins 3 and 8 of connector TP. In theupper left side of the picture, CHK is displayed in yellow. Press the action andvolume up buttons on the receiver. The CHK display turns red. The servicemanmode is indicated by CHK displayed in red at the upper left side of the picture. Pressthe power button on the remote or the action and volume down buttons on thereceiver repeatedly to select one of seven service modes.B = Sub Adjustments C = Cut-Off AdjustmentsD = Pin Cushion Adjustments M = Stereo AdjustmentsP = PIP Adjustments S = Options AdjustmentsX = Comb Filter AdjustmentsCHK = Normal operation of channel and volume buttons.EXIT SEREXIT SEREXIT SEREXIT SEREXIT SERVICEMAN MODEVICEMAN MODEVICEMAN MODEVICEMAN MODEVICEMAN MODENOTE: Always exit serviceman mode when finished making adjustments.Press action and power buttons on receiver control panel simultaneously forapproximately 2 seconds to exit serviceman mode. The receiver will display a selfcheck menu with audio on channel 3.SUB ADJUSTMENTSSUB ADJUSTMENTSSUB ADJUSTMENTSSUB ADJUSTMENTSSUB ADJUSTMENTSNOTE: Write down original On-set values in detail before making any adjustmentsin case a misadjustment occurs. Press channel up or down buttons on remote toselect any of adjustment addresses. Press volume up or down buttons on remote tochange level of adjustment.Sub Adjustment Range and Default LevelsAdjustmentAdjustmentAdjustmentAdjustmentAdjustment RangRangRangRangRangeeeee Default LeDefault LeDefault LeDefault LeDefault Levelvelvelvelvel On-SetOn-SetOn-SetOn-SetOn-Set VVVVValuealuealuealuealueSub Color (B0) 0-63 31 25Sub Tint (B1) 0-63 31 47Sub Brightness (B2) 0-63 31 44Sub Contrast (B3) 0-31 16 26Sub Tint Video (B4) 0-31 16 15Sub Color Video (B5) 0-31 16 16Sub Tint Component (B6) 0-127 63 58Sub Color Component (B7) 0-63 31 41Sub Sharp TV/Video (B8) 0-31 10 13Sub Sharp Component (B9) 0-31 31 31Sub Contrast Fixed (Ba) 0-31 15 31Sub Color (B0)Sub Color (B0)Sub Color (B0)Sub Color (B0)Sub Color (B0)Tune in a color bar signal. Connect oscilloscope to pin 1 of connector C1 on the Cboard. Connect TPD2 to ground. Enter serviceman mode and select Sub adjustment.Select sub color (B0). Adjust waveform for .9Vp-p ±.05Vp-p. Remove jumper.SubSubSubSubSub Tint (B1)Tint (B1)Tint (B1)Tint (B1)Tint (B1)Tune in a color bar signal. Connect oscilloscope to pin 1 of connector C1 on the Cboard. Connect TPD2 to ground. Enter serviceman mode and select Sub adjustment.Select sub tint (B1). Adjust waveform so the 1st and 4th peaks are of equalamplitude. Remove jumper.Sub Brightness (B2)Sub Brightness (B2)Sub Brightness (B2)Sub Brightness (B2)Sub Brightness (B2)This adjustment must be made after sub picture and color temperature adjustmentsare made. DO NOT adjust screen after sub brightness is set. Connect a color barsignal with pure white and pure black to the antenna input. Set color to minimum.Enter serviceman mode and select Sub adjustment. Select sub brightness (B2).Adjust until the black bars start to turn gray, then decrease adjustment until barsturn black.SUB Contrast (B3)SUB Contrast (B3)SUB Contrast (B3)SUB Contrast (B3)SUB Contrast (B3)NOTE: This adjustment is factory set, DO NOT adjust unless CRT or C board isreplaced.Connect a color bar signal to the antenna input. Connect oscilloscope to pin 2 ofconnector C1 on C board. Connect TPD2 to ground. Enter serviceman mode andselect Sub adjustment. Select sub contrast (B3). Adjust for 2.8Vp-p ± .1Vp-p fromwhite to black level. Do not include sync tip in measurement. Remove jumper.TEST EQTEST EQTEST EQTEST EQTEST EQUIPMENTUIPMENTUIPMENTUIPMENTUIPMENTTest equipment listed by participating manufacturer illustrates typical orequivalent equipment used by Sams engineers to obtain measurements.This equipment is compatible with most types used by field servicetechnicians.EquipmentEquipmentEquipmentEquipmentEquipment Sencore No.Sencore No.Sencore No.Sencore No.Sencore No.Oscilloscope SC3100GeneratorsRGB CM2125Multiburst Signal VG91Color Bar VG91TV Stereo VG91Digital VOM SC3100Frequency Meter SC3100Hi-Voltage Probe HP200Accessory Probes TP212Isolation Transformer PR570Capacitance Analyzer LC102CRT Analyzer CR7000AC Leakage Tester PR570Inductance Analyzer LC102Flyback Yoke Tester TVA92Field Strength Meter SL753Transistor Tester TF46Horizontal Analyzer HA-2500Video Analyzer VG91, TVA92MAINMAINMAINMAINMAIN TUNERTUNERTUNERTUNERTUNER VVVVVOLOLOLOLOLTTTTTAAAAAGE CHARGE CHARGE CHARGE CHARGE CHARTTTTTPinPinPinPinPin VHF LoVHF LoVHF LoVHF LoVHF Low Bandw Bandw Bandw Bandw Band VHF High BandVHF High BandVHF High BandVHF High BandVHF High Band UHF BandUHF BandUHF BandUHF BandUHF Band(1) AGC 2.0V 2.1V 1.6V(2) TU 1.1V 4.4V 5.4V(3) ADRS 0V 0V 0V(4) SCL 3.6V 3.6V 3.6V(5) SDA 3.6V 3.6V 3.6V(6) NC 0V 0V 0V(7) +B 4.5V 4.5V 4.5V(8) NC 0V 0V 0V(9) BTL 4.2V 7.5V 8.5V(10) NC 0V 0V 0V(11) IF1 0V 0V 0V(12) IF 0V 0V 0V(13) BV 9.0V 9.0V 9.0V(14) AUDIO .37V .37V .37V(15) GND 0V 0V 0V(16) AFT 1.9V 1.9V 1.9V(17) AGC OUT 2.0V 2.1V 1.6V(18) V 0V 0V 0V(19) AGC CONT 0V 0V 0V(20) GND 0V 0V 0V(21) ST 0V 0V 0V(22) BIL 0V 0V 0V(23) MODE 0V 0V 0V(24) F-MONO 0V 0V 0V(25) MUTE 0V 0V 0V(26) R 0V 0V 0V(27) L 0V 0V 0VNOTE: VHF Low Band voltages taken on channel 2.VHF High Band voltages taken on channel 7.UHF Band voltages taken on channel 14.τ (1)τ (9)τ (7)τ (5)τ (3)ττ(2)τ(4)τ(6)(8)MAINMAINMAINMAINMAIN TUNERTUNERTUNERTUNERTUNER TERMINAL GUIDETERMINAL GUIDETERMINAL GUIDETERMINAL GUIDETERMINAL GUIDEτ(10)τ (11)τ(12)τ (13) τ(14)τ (15) τ(16)τ (17) τ(18)τ (19) τ(20)τ (21) τ(22)τ (23) τ(24)τ (25) τ(26)τ (27)TUNER INFORMATION