Zenith C32V23 - 32" Flat-Screen Integrated HDTV Service Manual Download Page 28 | Manualshive

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PV154 - 923-03497

3-6

AB - SERVICING

SERVICING

SHUTDOWN CIRCUIT OPERATION

VERTICAL DEFLECTION

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Summary of Contents for C32V23 - 32" Flat-Screen Integrated HDTV

Page 1: ...ne E Product Year 2002 Overview 1 Service Menu 2 Servicing 3 Parts 4 Diagrams 5 Schematics 6 Published September 2002 by Technical Publications Zenith Electronics Corporation 201 James Record Road Hun...

Page 2: ...led by a 15 mfd 150V AC type capacitor be tween a known good earth ground water pipe conduit etc and the exposed metallic parts one at a time Measure the AC voltage across the combination of 1500 ohm...

Page 3: ...he HV compensation output Q3102 B signal during turn on and shutdown conditions transients CRT ANODE HIGH VOLTAGE MEASUREMENT PROCEDURE Each CRT screen size has it s own safe operating anode and shutd...

Page 4: ......

Page 5: ...CIRCUIT OVERVIEW 3 1 LARGE SIGNAL MODULE 3 1 SMALL SIGNAL MODULE 3 7 GEOMETRY ADJUSTMENTS 3 10 TROUBLESHOOTING 3 16 SECTION 4 4 1 PARTS 4 1 SECTION 5 5 1 34 EXPLODED VIEW 5 1 32 36 EXPLODED VIEW 5 2...

Page 6: ......

Page 7: ...oor reception of off air DTV broadcasts and makes the procesing of broadcasted data possible FLAT FINE PITCH PICTURE TUBE View HD content in it s highest resolution Fine pitch picture tube with Invar...

Page 8: ...or audio 2 CALIBRATE Service Port Only to be use by qualified TV servicers and technicians 3 ANTENNA CABLE 1 2 Use the Antenna Cable 1 to hookup an antenna or cable system 4 HD IN Connect High Definit...

Page 9: ...lects available sound options Stereo Mono SAP Displays the Sleep Timer Menu select adjust POWER LIGHT CABLE VCR AUX TV MUTE VOLUME LEFT RIGHT NUMBER KEY PAD CHANNEL NUMBER DASH ENTER VIDEO QUIT CC Clo...

Page 10: ...PROTON 004 058 116 131 143 171 173 QUASAR 034 056 092 RADIO SHACK 019 043 047 116 127 143 RCA 004 006 023 024 056 065 074 144 152 156 160 161 165 REALISTIC 007 019 043 047 ROCTEC 186 R U NCO 168 169 S...

Page 11: ...GON 0 01 PHILIPS 0 06 0 12 013 0 20 0 65 08 5 0 90 PIONEER 0 34 0 51052 0 63 0 76 POS T NEWS WEEK 0 16 PR U CER 0 59 PT S 0 11 048 0 71 0 72 073 074 PU LS AR 0 01 R CA 0 47 R EGAL 0 49 0 50 R EGENCY 0...

Page 12: ...N 108 123 153 173 M AGNAVOX 127 135 172 179 180 M AR ANT Z 129 135 141 159 224 225 226 M CS 111147 156 169 M IT S U B IS HI 120 179 229 230 231 ONKY O 125 126 130 131213 215 232 OPT IM U S 100 107 110...

Page 13: ...when user is in level 2 adjusting the Contrast Bar Refer to Table 1 1 to see the navigation and proper colors used for selected disabled and non selected features DTV AUDIO MENU The next figure 1 3 s...

Page 14: ...d when the Input Source selected is HD In ATV SETUP MENU Figure 2 1 shows the Setup Menu that allows you to select the Input Source The Tilt function is also included as part of this menu ATV VIDEO ME...

Page 15: ...Mode is on the Service Menu line appears at the top of the screen to allow for proper setting of the video When the Factory Mode is turned off all TV functions are returned to normal 01 11 02 TE 1011...

Page 16: ...signal 13 Audio processor PreI2S 0 127 16 16 16 16 16 16 Prescale for the digital I2S input signal 14 Audio processor AVC 0 8 4 4 4 4 4 4 Decay time for the automatic volume correction 15 Audio proces...

Page 17: ...54 54 54 54 PLL Frequency Limiter Bits 0 7 47 LlcStart BIT S 0 15 15 15 15 15 15 15 PLL Vertical Freeze Start Bits 8 11 48 LlcStart BIT S 0 7 0 254 246 246 246 246 246 246 PLL Vertical Freeze Start B...

Page 18: ...l 82 2150 PLimitLev 0 3 0 0 0 0 0 0 Limited Level Control for Input 83 WbSW 0 1 0 0 0 0 0 0 White Balance Offset ON OFF 84 CtiLev CV YC DVD DTV HD 0 3 2 2 2 2 2 2 Control of gamma correction amount 85...

Page 19: ...Blanking Control 114 RightBlk 0 63 30 30 30 30 30 30 Right Blanking Control 115 SyncPhase HD DTV NTSC 0 1 0 0 0 0 0 0 Hsync Delay Adjustment 116 HblkSW 0 1 1 1 1 1 1 1 H Blanking Generation Mode 117 A...

Page 20: ...n amount adjustment for bottom edge of picture 143 UpPol 0 1 0 0 0 0 0 0 Horizontal pin distortion compesation polarity setting for extreme top and bottom edge of picture 144 UpUcp 0 3 0 0 0 0 0 0 Hor...

Page 21: ...3 Chroma Bandwidth for Composite Video Source CBW YC 0 3 3 3 3 3 3 3 Chroma Bandwidth for Y C Video Source 171 KILVL 0 254 5 5 5 5 5 5 Color Killer Activation level for all NTSC Video Sources 172 KILH...

Page 22: ...tio MaxBrt_4x3 HD 0 100 100 100 100 100 100 100 Maximum Brightness for 4x3 Aspect Ratio 11 MinCont_4x3 NTSC 0 100 6 6 6 6 6 6 Minimum Contrast for 4x3 Aspect Ratio MinCont_4x3 HD 0 100 6 6 6 6 6 6 Min...

Page 23: ...two possibilities Quasi Resonant Mode and 20 kHz The Quasi Resonant mode handles the power when the application is turned on When off the 20 kHz mode allows minimum power consumption The third circui...

Page 24: ...ection Scan Boost 26 V Stand by Used for Audio Section SWITCHED VOLTAGES FROM SWITCHED SMPS 215 V Switched Used for driving the Video output 100 V Switched 100 SVM Scan Velocity Modulation circuitry 3...

Page 25: ...l Deflection HORIZONTAL DEFLECTION AND HV GENERATION The Horizontal Deflection circuitry is a common flyback topology used in many television and monitor applications QX3200 is the Horizontal Output T...

Page 26: ...n the output to drive the gate of the switching transistor Q3103 This ramp signal is present only during the flyback pulse Q3103 is on during the scan time and as long as the error voltage is higher t...

Page 27: ...PV154 923 03497 3 5 AB SERVICING SERVICING BASE DRIVE HV COMPENSATION...

Page 28: ...PV154 923 03497 3 6 AB SERVICING SERVICING SHUTDOWN CIRCUIT OPERATION VERTICAL DEFLECTION...

Page 29: ...ndTuner Provision SIF 1 SIF 2 AUX L AUX R from Switcher ADC DE MOD Pre proc DAC H P DAC DAC DAC ADC Pre scale Pre scale SCART DSP Input Select SOUND PROCESSOR MSP4450G Source Select SDA 1 SCL 1 Audio...

Page 30: ...tput is constant Below is a simplified block diagram of the AB chassis video output circuit The signal is first uncoupled at the output of the video processor Then the signal is derived by the video d...

Page 31: ...on pin 2 of the inverting voltage input The input configuration consists of a bipolar NPN transistor in a long tailed pair configuration The input current is 30uA This IC is provided with a black curr...

Page 32: ...REGISTER 126 NAME AFC ANGLE The AFC ANGLE values can go from 0 up to 63 If the register value is increasing up to 63 you will see the fig 3 If you start decreasing the register value down to 0 you ll...

Page 33: ...Figure 7 This image shows the result of decreasing the register value down to 0 You can notice that full image is moving downward without affect the geometry Figure 8 This image shows the result of i...

Page 34: ...otice that top half of picture is fully open and the bottom half remains unaffected by the correction Figure 14 This image shows the result of decreasing the register value down to 0 You can notice th...

Page 35: ...e V POSITION This correction affected vertical height and width size of picture The register can take values from 0 up to 63 If you decrease the register value down to 0 you ll see the fig 19 If you i...

Page 36: ...he fig 24 If you increase the register value up to 63 you ll see fig 25 Fig 24 Fig 25 Fig 24 This image shows the result of decreasing the register value down to 0 This correction affect the top half...

Page 37: ...ffected only the upper corners which are bowed inward Fig 29 This image shows the result of increasing the register value up to 63 This correction affected only the upper corners which are bowed outwa...

Page 38: ...positive lead Replace Digital Board Check Y on C2201 positive lead Check 5V sw1 on C2710 Check 5V SYNF on C2723 Check 5V sw2 on C2730 Check IIC Check Y on Q2708 Emitter Check CRY2201 oscillation Chec...

Page 39: ...High Voltage Adjustment in Power Supply Board Size Adjustment in Daugther Board High Voltage Sensing in Daugther Board Scan Boost Converter in Power Supply Board High Voltage OK High Voltage Compensat...

Page 40: ...rd Check 5V sw1 on C2710 Check 5V SYNF on C2723 Check 5V sw2 on C2730 Check Y on Q2708 Emitter Check CRY2201 oscillation Check IIC Check sync on Y at C2705 Check timings and levels of H DRV on Q2204 E...

Page 41: ...27 28 of IC1400 Check IC1400 and audio line YES NO Check IC800 and audio line Check digital board YES NO No Sound auxiliary input Check pin 52 54 of IC2900 Check pin 36 37 of IC1400 and pin 2 4 of CNP...

Page 42: ...be operated even with the Keyboard Reset Microcontroller and try again Analog CC Analog Rating are not displayed micro section If Possible use an Analog CC generator to make sure CC service is provid...

Page 43: ...16 AND SCL SDA AT PINS 4 5 OF WT1200 CHECK 5VTNA AT LX3825 AND 5VTNA LINE CHECK IIC BUS LINES NO ANALOG RF SIGNAL DIGITAL RF SIGNAL YES CHECK COMPOSITE VIDEO SIGNAL AT PIN 15 OF WT1200 YES NO CHECK AG...

Page 44: ...27 28 of IC1400 Check IC1400 and audio line YES NO Check IC800 and audio line Check digital board YES NO No Sound auxiliary input Check pin 52 54 of IC2900 Check pin 36 37 of IC1400 and pin 2 4 of CNP...

Page 45: ...2 Module Digital Board with ACC DCC P014 12361 04 Front Cabinet P014 12362 03 Rear Cabinet P050 02864 11 Connector Cable Ass y Speaker Interconnect Harness P124 00240 Space Command Transmitter MBR4286...

Page 46: ...il Degausser 824 10102 Cover Front Jack Molded Plastic 824 10108 Cover Blank Tweeter Opening 830 10009 Decorative Item 849 10049 Speaker Ass y 852 10066 Connector Cable Assembly Speaker Interconnect 8...

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Page 49: ...0 062E 320 062E 5 FRONT DOOR PA 19619 PA 19619 6 SPRING PLATE 4970V00020A 4970V00020A 7 IR LENS P192 00929 P192 00929 8 FRONT JACK PF 54857 01 PF 54857 01 9 CRT YOKE ASSEMBLY PA 19570 PA 19570 10 CRT...

Page 50: ...02 P012 10922 01 02 8 SPEAKERS PA 19426 PA 19426 PA 19426 PA 19426 9 FRAME ASSY PF 54845 03 PF 54845 04 PF 54845 01 PF 54845 05 10 POWER SUPPLY ASSY P009 02290 03 P009 02290 03 P009 02290 01 P009 0229...

Page 51: ...PV154 923 03497 5 3 AB EXPLODED VIEWS Interconnect Diagram DIGITAL BOARD POWER SUPPLY MODULE SCAN BOOST MODULE MAIN MODULE FRONT JACKPACK KEYBOARD MODULE VIDEO OUTPUT AND SVM MODULES RF SWITCH...

Page 52: ...CL SB SDA Affordable DTV BLOCK DIAGRAM CRT Driver CXA2150AQ Video Sync Selector CXA2151Q Y o k e R G B Out R G B FB Micro EW_Drv H_Drv V_Drv H V Y Cr Cb H V Y Cr Cb Comb Filter CV In YC Out Comb Filte...

Page 53: ...2 THX3902 PROV RX3400 1 2W 5 6M BRX3400 KBJ 406GP 01L 600V 4A 212 172 4 BRX3450 600V 4A 212 172 4 QX3900 E B C KTC3228 0 0TR322809AA THX3410 63 10930 4 THX3460 63 10930 4 CX3400 2200pF 4KV CX3401 250...

Page 54: ...7 C3316 PROV C2104 100V 0 47MF C3315 500V 1500pF CX3205 3KV 530 pfd CX3206 1000V 0 01 F C3212 100V 0 22 C3220 PROV 200V C3211 1000V 470pF C4807 2000V 0 02 C3230 200V 0 1 C3213 1000V 1000pF C3317 1000V...

Page 55: ...00 F CX3663 16V 2200 F CX3856 16V 100 F CX3883 16V 100 F CX3653 50V 220 F CX3650 2000V 1500pF CX3651 630V PROV CX3652 1000V PROV CX3655 PROV 100pF CX3656 50V 100pF CX3657 50V 0 047 RX3755 27K 1 CX3752...

Page 56: ...CX3607 50V 0 047 ZDX3711 MTZJ5 1B 5 1V 1 2W 0DZ510009DB RX3805 5W 1 5 CX3806 35V 220 F LX3805 22 H CX3805 35V 220 F QX3805 E B C KTC3228 0 0TR322809AA RX3422 0 1 3 57K LX3612 P149 705 CX3612 35V 2200...

Page 57: ...02 B SHUTDOWN 8 7 6 5 4 3 2 1 CN5W2 58 605 8 8 7 14 2 1 3 13 12 4 11 5 10 9 6 VCC GND IC3100 LM339N 221 121 1 8 4 3 2 1 IC3101 A SN100635 RC4558P 221 240 7 5 6 IC3101 B SN100635 RC4558P 221 240 RX3001...

Page 58: ...1 1140A Q4806 BF959 E B C 0TR959009AA Q4802 E B C 2SA1020Y 121 1102A Q4807 KSA733C Y E B C 0TR733009AA Q4805 KSA733C Y E B C 0TR733009AA 5 6 7 8 4 3 2 1 IC4801 LM318N 221 559 5 6 7 8 4 3 2 1 IC4802 LM...

Page 59: ...F C3313 100V 1000pF O S C R E F 14 2 1 3 13 12 4 11 5 10 9 6 7 8 IC3300 MC34060AP 221 345 1 R3316 10K R3326 47 R3309 470K 1 R3308 470K R3321 10K R3330 270 RX3327 10 R3325 5 6K 1 RX3329 68 R3305 971 1...

Page 60: ...714 E B C 408 002D 121 1343 2SC4793 R5501 2W 470 R5502 1 2W 10 R5504 PROV R5509 470 R5511 1 2W 10 R5515 PROV R5516 47K 1 R5518 43 R5519 2 7 R5522 2W 330 W5500 971 16 C5509 50V 0 1 C5510 50V 100pF C551...

Page 61: ...04 126 3760 1 PF 54551 1 CM5167 16V PROV CM5165 500V 0 01 1 CM5164 16V 0 1 CM5163 16V 0 1 R5110 1 2W 470K CM5145 500V 0 01 CM5147 16V PROV R5129 P L 1 2 R5112 1 2W 1K 5 6 9 10 8 11 13 2 1 7 12 3 CRT2...

Page 62: ...VP408 2D 221 1460 3 CTL CTL PF 54860 ICX3825 KA78R05 G G OUT IN VP408 2D 221 1460 3 CTL CTL PF 54860 1 2 3 4 DMX3831 MBRD835L P103 598 ICX3835 KA78R05 G G OUT IN VP408 2D 221 1460 3 CTL CTL PF 54860 C...

Page 63: ...3 7 4 8 6 5 1 2 GND PROTECTION OUT1 OUT2 Vcc2 Vcc1 SW2 SW1 NC PROTECTION IC4501 LB1645N 0ISA164500B C4503 50V 47 F CM4501 50V 0 01 3 2 1 CNCOIL 366 921B C4504 50V 4 7 F RM4506 10K RM4507 12K D4500 1N4...

Page 64: ...0V 22PF CM6037 50V 30PF RM6070 220 RM6040 27K JM6000 0 1 6 5 4 3 2 1 CN2K7 P L TO KEYBOARD 2 34W RM6053 100 CM6004 50V 47PF CM6005 50V 47PF RM6078 10K RM6079 12K Q6001 E B C BF959 0TR959009AA CM6038 5...

Page 65: ..._IF1 TADJ AGCSWI NC VAGC AGCADJ VP VoDVB VVCO TAGC CAGC GND 11 12 20 19 18 17 NC AFC VCO1 16 VCO2 15 14 13 IC1203 TDA9829T 0IMCRPH011A 4 1 2 OUTPUT 5 OUTPUT 3 INPUT INPUT_GND CHIP_CARRIER_GND U1201 X6...

Page 66: ...10 H L1302 10 H L1304 10 H L1306 10 H Q1300 E B C KSA733C Y 0TR733009AA Q1302 KSA733C Y E B C 0TR733009AA Q1304 E B C KSC945C Y 0TR945009AA RM1300 470 RM1302 1 5K RM1306 330 RM1307 470K RM1308 100 RM...

Page 67: ...ICM2700 CXA2151Q 0IMCRSO008A CM2724 50V 0 1 L2704 47 H RM2723 1K RM2720 1K CM2727 50V 0 1 R2710 75 2 CM2741 50V 47PF CM2742 50V 47PF RM2702 6 8K RM2703 3 3K RM2707 6 8K RM2708 3 3K RM2712 6 8K RM2713...

Page 68: ...VSAW0 V AGC V OSC EW DRV DF PARA MP PARA GND V HC PARA VS IN H DRV HP IN HCOMP IN VPROT HPROT CERA GND H L2 FIL SABL IN V DRV ABL IN VCC9 VTIM V DRV R OUT G OUT B OUT VCC OUT PRE RGB IK IN ABL FIL AF...

Page 69: ...AVSUP ANA_IN ANA_IN2 TESTEN XTAL_IN XTAL_OUT TP AUD_CL_OUT NC NC D_CTR_I O_1 D_CTR_I O_0 STBYQ VREF1 NC NC NC ANA_IN1 NC ADR_SEL IC1400 MSP4450G 0IMCRMN012A OUT VCC GND IC1401 KA7542 GND VCC OUT 0IFA7...

Page 70: ...RM2943 PROV RM2944 PROV RM2925 6 8K RM2989 1K RM2956 100 RM2990 100 RM2960 620 RM2977 47K RM2978 47K RM2979 47K RM2980 100 RM2981 10K RM2982 150 RM2983 270 ZD2901 MTZJ9 1B 8 2V 0DZ910009AJ 1 2W R2901...

Page 71: ...K RM2970 1 5K RM2973 6 8K RM2974 3 3K RM2975 1 5K RM2929 10K ZD2911 MTZJ9 1B 8 2V 1 2W 0DZ910009AJ ZD2912 MTZJ9 1B 8 2V 1 2W 0DZ910009AJ 30 24 29 12 13 22 21 20 19 18 17 38 16 15 CV INPUT2 14 9 8 1 4...

Page 72: ...3 2 21 25 13 11 8 20 26 19 32 18 30 17 24 28 29 9 31 1 CNP201A 85013 0050 6932V25004A 16 14 12 10 5 23 7 15 6 27 22 4 3 2 21 25 13 11 8 20 26 19 32 18 30 17 24 28 29 9 31 1 CNP200A 85013 0050 6932V250...

Page 73: ...0V P L vs gnd vout IR1 TSOP1240 GND GND PF 54634 P12 10927 162 46 R10 1K R11 1K R12 1K R13 1K R14 1K R15 1K R16 1K R2 100 R3 330 R4 10K R5 10K R6 10K R7 1K R8 1K R9 1K MENU VOL DWN VOL UP CH DWN CH UP...

Page 74: ...Circuit YC SENSE C FRONT GND VC Y FRONT CV F SENSE CV FRONT GND CV L4 IN R4 IN GND AUD 8 7 6 5 4 3 2 1 9 10 CN2FR10 58 586 10 J13 78 3402 1 J14 78 3402 J12 78 3403 C Y J11 78 3404 1 S VIDEO IN VIDEO I...

Page 75: ...TED COMPONENT A B C D E F G 1 2 3 4 5 6 7 8 9 10 6 23 AB SHEET 23 CM154 923 03497 Power On LED and IR Circuit 5V SB 5VSB 5 VSB C51 50V 0 01 C52 100V 470pF C53 16V 100 F OUT VCC GND IR100 GND GND VCC O...

Page 76: ...Q2900 E B C Q 4501 E B C Q4502 E B C Q 1304 E B C Q 2908 E B C Q2907 E B C Q2909 E B C ZD2701 ZD2912 CNP201A 1 CNP200A 1 C2205 C2223 Q2201 E B C C6029 RM 1246 RM 1247 C1201 C1202 C1203 C1204 C1207 C1...

Page 77: ...2 7 1 5 L 2 7 0 1 C 2 7 3 6 C 2 7 3 7 C M 2 7 4 7 R M 2 7 4 7 R M 2 7 1 7 R M 2 7 4 6 R M 2 7 1 8 R M 2 7 4 5 R M 2 7 1 9 C 2 7 1 3 C 2 7 1 2 C 2 7 1 1 R M 2 7 1 6 C M 2 7 4 5 E B C Q 1 2 0 5 E B C Q...

Page 78: ...805 LX3852 RX3852 RX3805 W 89 RX3850 W 77 W 78 W 63 CX3881 W 88 W 31 LX3802 LX3881 CX3650 CX3651 W 2 CN6A4 CX3464 CX3652 W 91 W 17 CX3463 RX3650 RX3422 CX3420 KX3870 CX3653 CX3421 I CX3420 A R C ZDX36...

Page 79: ...0 5 C X 3 8 0 5 C X 3 8 5 6 L X 3 8 5 8 C X 3 8 8 3 L X 3 8 5 7 L X 3 8 5 1 R X 3 8 5 9 L X 3 8 0 5 L X 3 8 5 2 R X 3 8 5 2 R X 3 8 0 5 W 8 9 R X 3 8 5 0 W 7 7 W 7 8 W 6 3 C X 3 8 8 1 W 8 8 W 3 1 L X...

Page 80: ...21 D5142 ZD5104 C5103 D5162 L5101 C5102 R5131 R3325 R5500 Q5103 E B C R5106 R5111 R5503 R3326 R3132 R3134 R3133 R3131 R3108 D3105 C3102 C3101 C3100 R3139 C3115 C3113 Q3104 E B C R3144 C3116 C3105 C310...

Page 81: ...505 W 2 C5510 R 5 5 0 6 C5500 C M 5 1 2 5 C M 5 1 4 5 C M 5 1 6 5 1 CN6K2A W 5101 CN7K2 1 CNG2 R5109 D 5 1 0 2 R5112 E B C Q5101 C5105 C5106 R 5 1 1 7 R3309 R 3 3 2 0 W 5 1 0 0 Q5104 E B C R M 5 1 1 8...

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