Advertisement
Quick Links
2000 C-Line Projection TV
( ! "Ã " # $
(
Q … v ‡ r qÃÃD ÃÃV T 6
C
! Ãa r v ‡ uÃ@ y r p ‡ … ‚ v p †Ã8 ‚ … ƒ ‚ … h ‡ v ‚
Zp94 & ZP95
7HFKQLFDO 7UDLQLQJ 0DQXDO
3URGXFW 2YHUYLHZ
&KDVVLV 'HVFULSWLRQV
)DFWRU\ 6HWXS
&RQYHUJHQFH
&LUFXLW 7URXEOH 6KRRWLQJ
Z E N I T H E L E C T R O N I C S C O R P O R A T I O N
2 0 1 J A M E S R E C O R D R O A D H U N T S V I L L E , A L . 3 5 8 2 4
Advertisement
Subscribe to Our Youtube Channel
Related Manuals for Zenith IQC50H94
Summary of Contents for Zenith IQC50H94
- Page 1 2000 C-Line Projection TV Zp94 & ZP95 7HFKQLFDO 7UDLQLQJ 0DQXDO 3URGXFW 2YHUYLHZ &KDVVLV 'HVFULSWLRQV )DFWRU\ 6HWXS &RQYHUJHQFH &LUFXLW 7URXEOH 6KRRWLQJ ( ! "Ã " # $ Z E N I T H E L E C T R O N I C S C O R P O R A T I O N ( Q …...
- Page 2 CONTENTS Safety Information ......................1 General Information ......................5 Service Menus ......................8 Convergence Setup ......................15 Circuit Descriptions ......................28 Troubleshooting ......................90...
- Page 3 PRODUCT SAFETY PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS IMPORTANT SAFETY NOTICE A.C. VOLTMETER Place this probe 0.15uf Good earth ground on each exposed metal part such as a water 1500 Ohm pipe, conduit, etc. 10 Watt X-RADIATION Caution: Graphic symbols SERVICE INFORMATION IMPLOSION FIRE AND SHOCK HAZARD...
- Page 4 PRODUCT SAFTEY CHASSIS HIGH VOLTAGE ADJUSTMENT PROCEDURE +50V Pulse Add JIG to check Hi Volt Limit Circuit JIG = 1k ohm 1/8W DH24 RH54 CH30 DH31 RH55 TH01 CHASSIS FLYBACK PROTECTION CIRCUIT CHECK Check Preparation: RH44 High Voltage ADJ. VIDEO CONTROLS: SCREEN FORMAT: PROGRES- CHASSIS HIGH VOLTAGE LIMITER...
- Page 5 PRODUCT SAFETY CHASSIS SWEEP LOSS DETECTION CIRCUIT CHECK Check Preparation: VIDEO CONTROLS: SCREEN FORMAT: PRO- GRESSIVE VIDEO CONTROLS: SCREEN FORMAT: PRO- GRESSIVE &1 &1...
- Page 6 PRODUCT SAFTEY +9 &DEOH )O\EDFN 326,7,21 ),* % ÃA7U 6IP9@Ã 9@AG@8UDPIÃ 8PII@8UPS Q X7 +9 &DEOH %RRW $VVHPEO\ /(66 7+$1 PP )O\EDFN During Insertion QVTC QVTC ADBÃ6 During Removal...
-
Page 7: General Information
GENERAL INFORMATION SPECIFICATIONS FOR IQB-94/95 SERIES MODELS Mode l: IQC50H94/95 IQC60H94/95 Audio Input: 470 mVrms, 47 k Ohm 470 mVrms, 1 k Ohm Stere o Audio O utput: Cathode -Ray R = P16LFM00RFA(LU) Audio O utput Power: Front- 12 Watt at 10% distortion, 8 Ohm Imp. - Page 8 GENERAL INFORMATION General Information Remote Access << >> figure 1 Video Performance MBR3475Z 924-10068...
- Page 9 GENERAL INFORMATION SOURCE SOURCE -VOLUME+ -CHANNEL+ POWER DIGITAL SETUP 69,'(2 5,*+7 /()7 65 65 $8',2 9,'(2 $8',2 MENU EXIT DIGITAL CONVERGENCE SETS ONLY TV / VIDEO Source Selector <<figure 2. Control Panel>> ANT A Converter S-VIDEO S-VIDEO S-VIDEO ANT B VIDEO VIDEO VIDEO...
-
Page 10: Service Menus
SERVICE MENUS Service Menu Access To access the service menu on the ZP94/95 series; 1. Press and hold the SOURCE button on the user control panel at the front of the set. 2. While holding the SOURCE button, press the POWER button on the user control panel at the front of the set to activate the service menu. - Page 11 SERVICE MENUS ITEM SETTING RANGE DESCRIPTIO N ZP94/95 *Non-Adjustable Data ADJUST MODE Version 704 SUB BRT 3C-C3 Sub Brightness SERVICE SERVICE DEF RESET V/P RESET 3DYC RESET FLEX RESET DSP RESET CCD RESET FACT RESET Resets Memory MEMORY INITIAL Resets Memory ZP94/95 ADJUST MODE T A1300 31.5khz M...
- Page 12 SERVICE MENUS ITEM SETTING RANGE DESCRIPTIO N ZP94/95 *Non-Adjustable Data FLEX CONT NT SC 39 HHPF1 00-01 Characteristic Switch 0 = Low Frequency, 1 = High Frequency 41 V-CRG 00-03 Vertical Enhance Coring 42 H-CRG 00-03 Horizontal Enhance Coring 43 V-ENH 00-03 Vertical Enhance 44 H-ENH...
- Page 13 SERVICE MENUS ITEM SETTING RANGE DESCRIPTIO N ZP94/95 *Non-Adjustable Data FLEX CONT AT SC (480i, 480p, 1080i, 720p) 97 YV-NLP 00-3F Y Vertical Nonlinear Peaking 98 YH-NLP 00-3F Y Horizontal Nonlinear Peaking 101 Y-LMT 00-FF Y Amplitude Limit 83 YH-FRQ 00-03 Y Horizontal HPF Peak Frequency Switch 91 CH-FRQ...
- Page 14 SERVICE MENUS ITEM SETTING RANGE DESCRIPTIO N ZP94/95 *Non-Adjustable Data FLEX CONT NT SC/ATSC (480i, 480p, 1080i, 720p) 23 V-POS 00-3F Wide Vertical Position 24 V-SIZ 00-FF Wide Vertical Size 50 HD-POS 00-7F HD Position Offset 48 VBLK-T 00-FF Vertical Blanking Top Position Offset 49 VBLK-B 00-FF Vertical Blanking Bottom Position Offset 51 HBLK-R...
- Page 15 SERVICE MENUS ITEM SETTING RANGE DESCRIPTIO N ZP94/95 *Non-Adjustable Data T A1298 NT SC COLOR 00-7F Color (Center Adjustment) T INT 00-7F T int (Center Adjustment) R-Y PH 00-03 R-Y Phase R/B GA 00-03 R/B Gain G-Y PH 00-03 G-Y Phase G/B GA 00-03 G/B Gain...
- Page 16 SERVICE MENUS ITEM SETTING RANGE DESCRIPTIO N ZP94/95 *Non-Adjustable Data T A1298 00-07 Black Strech Point APL/BS 00-03 APL / Black Strech Point B COR 00-01 Black Level Correction B GA 00-01 Black Strech Gain B DET 00-01 Black Detect Level DABL PN 00-07 Dynamic ABL Detection Point...
- Page 17 CONVERGENCE 6&5((1 95 )2&86 95 a '5,9( 95...
- Page 18 CONVERGENCE 8CSPH6UD8 67@SS6UDPI TGDBCU`Ã7GV@Ã8CSPH6UD8Ã67@SS6UDPI PSÃIPÃ8PGPS Set Size Pitch between L1 & L2 50" 3.0 cross-hatch pitches 55" 3.0 cross-hatch pitches 60" 3.0 cross-hatch pitches Lens Change of color aberration R Lens Crimson G Lens Blue B Lens Purple Green 8CSPH6UD8 67@SS6UDPI TGDBCU`Ã8SDHTPIÃ...
- Page 19 CONVERGENCE QVSQG@Ã8CSPH6UD8 TGDBCU`ÃBS@@IÃ 67@SS6UDPI 8CSPH6UD8Ã67@SS6UDPI Set Size Pitch between L 50" 3.0 cross-hatch pitches 55" 3.0 cross-hatch pitches 60" 3.0 cross-hatch pitches ADYDIBÃT8S@X 8PGPSÃ 67@SS6UDPI /(16 8SPTTC6U8C HD MODE PROGRESSIVE MODE PHASE MODE: PHASE MODE: PH-H: BB PH-H: BB PH-V: OC PH-V: O7 CR-H: 4C CR-H: 4C...
- Page 20 CONVERGENCE 7@APS@ 68UDW@ WD9@Pà VT@Ã8VSTPS 8@IU@S F@`TÃUPÃHPW@ ASPH 9PUU@9ÃGDI@T TU@QÃ$ 7@UX@@IÃ7@IUà à !€€ @à GDI@TÃADSTU B…rr SrqÂ… 7yˆr UC@IÃVT@ÃIVH7@SÃF@`TÃUPÃH6U8CÃDIU@SI6G @à 8SPTTC6U8CÃ8@IU@SÃUPÃ68UDW@ÃWD9@PÃ8@IU@S 6AU@S @Ã! 8…‚††uh‡puÃB…rr...
- Page 21 CONVERGENCE...
- Page 22 CONVERGENCE Size 50" 670mm 60" 775mm Size Progressive Mode HD Mode 50" 1050mm 1050mm 60" 1200mm 1200mm...
- Page 23 CONVERGENCE ADYDIBÃT8S@X /(16 QSUÃTˆ…shprÃTvqr #Q‚yrÃ7rh€ 6yvt€r‡ Hhtr‡ ar…‚ÃAvryq Tƒhpr…ÃI‚ !Q‚yrÃ7rh€ 6qwˆ†‡€r‡ 6yvt€r‡ Hhtr‡ U…ˆrÃ8v…pyrÃ9rt…rr)Ãhi Tƒrpvsvph‡v‚)Ã( ...
- Page 24 CONVERGENCE P7T@SWDIBÃQPDIUTÃPAÃUC@ 8PSI@SÃPAÃUC@ÃQD8UVS@ 6FUHHQ 95 )RFXV 95 )2&86 3$&. P7T@SWDIBÃQPDIUT Screen Adjustment VRs Drive Adjustment VRs Red: on Focus Pack Red: R873 on CPT P.W.B. Green: on Focus Pack Green: R842 on CPT P.W.B. Blue: on Focus Pack Blue Defocus “Sticking Out” Center of Blue crosshatch line...
- Page 25 CONVERGENCE...
- Page 26 CONVERGENCE $'-8670(17 32,17 & G -On ly S creen T‡h…‡vtÃ6qwˆ†‡€r‡ÃQ‚v‡ " G‚ph‡v‚ÃD‡r…†rp‡v‚Âsà 7yvxvtÃ8ˆ…†‚…...
- Page 27 CONVERGENCE G -On ly Screen Gvr†Ã†’€€r‡…vphyy’ÃhyvtrqÃh‡Ã‡urà 6qwˆ†‡€r‡ÃQ‚v‡† 8ˆ…†‚…Ãiyvx† †ryrp‡rqÃp‚y‚… SrqÃ6yvt€r‡ Yellow Cross-hatch 7yˆrÃ6yvt€r‡ M agenta Cross-hatch...
- Page 28 CONVERGENCE Red Alignment Yello w Cro ss-hatch Blue Alignment M agenta Cross-hatch...
- Page 29 CONVERGENCE DIGITAL CONVERGENCE REMOTE CONTROL PHASE AUXILLIARY BLUE (13X9 ADJUSTMENT) CURSOR UP CURSOR RIGHT CURSOR LEFT ROM WRITE CURSOR DOWN GREEN (3X3 ADJUSTMENT) (7X5 ADJUSTMENT) ADJUSTMENT CROSSHATCH / REMOVE COLOR VIDEO MODE INITIALIZE RASTER POSITION ROM READ MBR3475Z 924-10092...
- Page 30 CIRCUIT DESCRIPTION Raw 150V T901 Switch Mode Transformer Drain I901 Switch Mode Q910 I902 Q902 Buffer Opti-Coupler Buffer Q914 I903 Q905 Shutdown Opti-Coupler Input...
- Page 31 ZP94/95 SERIES CHASSIS STBY POWER SUPPLYCIRCUIT S902 Relay +29 to Audio Circuit PQU1 D902 D912 S901 AC Relay T901 SW+35 +35V Switch Mode PQS1 S903 Transformer Relay Drain SBY+7 I901 I905 PQS2 Switch Protect D927 +28V Mode SBY+11 I906 PQD2 & Regulate PQS1 D949...
- Page 32 CIRCUIT DESCRIPTION...
- Page 33 CIRCUIT DESCRIPTION ZP94/95X CHASSIS L.E.D. (VISUAL TROUBLE DETECTION) DIODES SUB POW ER SUPPLY PW B 4 GREEN L.E.D.s and 1 RED L.E.D. Stby Audio Stby +7V +11V Ft. 29V R933 R930 R936 D931 D912 D949 D927 ALL GREEN L.E.D.s Start U p R905 R906 V cc...
- Page 34 CIRCUIT DESCRIPTION...
- Page 35 CIRCUIT DESCRIPTION ZP94/95 STBY POWER SUPPLY (Low Voltage) SHUT-DOWN CIRCUIT T901 D902 D905 R905 R906 R908 D904 C908 C907 I901 R960 R945 D921 Power D936 D935 I903 Sw +12V D944 R909 D933 D932 Q901 Sw +5V R911 D941 Stby +11V R910 C910 D938...
- Page 36 CIRCUIT DESCRIPTION...
- Page 37 CIRCUIT DESCRIPTION...
- Page 38 CIRCUIT DESCRIPTION ZP-94/95 DEFLECTION Vcc PRODUCTION CIRCUIT SUB POWER PWB DEFLECTION PWB SIGNAL PWB Turns on I009 SW +9V Reg and PQD2 IS13 +5V Reg on Surround PWB From I906 Stby +11V Reg. STBY +11V Q003 Q004 Stby +11V Start Up Power PQS1 I001 Micro...
- Page 39 ZP-94/95 SERIES CHASSIS MAIN DEFLECTION POWER CIRCUIT DP08 +220V 220V PQD1 Heater IP02 PDC1 D902 Convergence DP09 Convergence DP03 T901 B=120V 1 DP10 Switch Mode DEF. Transformer +120V Drain B=120V 2 DP11 I901 +28V PDC1 Switch Convergence DP12 Mode -28V Convergence DP07 DP13...
- Page 40 CIRCUIT DESCRIPTION ZP-94/95 CHASSIS L.E.D. (VISUAL TROUBLE DETECTION) DIODES DEFLECTION PWB 1 GREEN L.E.D.s and 1 RED L.E.D. Start Up 24.2V Osc B+ IP04 120V Deflection B+ RP02 RP03 RP28 IP01 Driver/Output RP29 IP04 Regulator Photocoupler DP29 RP42 DP37 is a RED L.E.D. DP37 ALL GREEN IP03...
- Page 41 CIRCUIT DESCRIPTION ZP-94/95 DEFLECTION POWER SUPPLY SHUTDOWN DIAGRAM Deflection B+ (120V) RP17 Excessive Current Det. TP91 DP11 0.47 Deflection B+ 120V CP33 Deflection B+ (120V) RP21 Excessive Voltage Det. S-901 QP02 Def. Power RP22 Vertical Circuit Supply Relay Excessive Current Det. DP15 DP17 Pin 10...
- Page 42 CIRCUIT DESCRIPTION...
- Page 43 CIRCUIT DESCRIPTION...
- Page 44 CIRCUIT DESCRIPTION...
- Page 45 CIRCUIT DESCRIPTION...
- Page 46 CIRCUIT DESCRIPTION ZP94/95 SERIES "POWER ON & OFF" DIAGRAM I001 Microprocessor SBY11V I701 Power H Drive IC PQD2 On/Off QP04 DP36 PQS1 Def. Hoz. RP36 Q002 DP35 ON = Hi RP38 HVcc OFF = Lo RP37 Power On/Off L701 ON = Hi DP21 CP44 OFF = Lo...
- Page 47 ZP-94/95 SERIES "POWER ON & OFF" DIAGRAM I001 Microprocessor Power Reset On/Off PQS1 I907 +28V SW+5V 3.3V SW+5V D928 3.3V Q002 Reg IC Q903 2.5V D945 I908 SW+12V D948 SW+12V R053 R951 R957 Reg IC R950 C948 C032 R958 Q909 D946 To Gate of Q914 +28V...
- Page 48 CIRCUIT DESCRIPTION...
- Page 49 CIRCUIT DESCRIPTION ZP-94/95 SYSTEM CONTROL PORT DESCRIPTION I001 VDD (3.3V) CLOCK U201 Dimmer DATA MAIN TUNER FE Enable1 ENABLE Main/Sub AFC VSS (Gnd) U202 DATA DSP Reset CLOCK PinP AC In TUNER FE Enable2 ENABLE OSD X1 Key In OSD Xo U205 OSD B Clock...
- Page 50 CIRCUIT DESCRIPTION Function Active IRIN Receives Remote Control Inferred pulses. Data SDA1 Serial Data Sent and Received from the EEPROM, A/V Selector, DAC1, DAC2. Data Function of I2C. SCL1 Serial Clock Synchronization Sent to the EEPROM, A/V Selector, DAC1, Data DAC2.
- Page 51 CIRCUIT DESCRIPTION Function Active AVDD Stby +3.3V generated by 0029. COMP Internal function of the Microprocessor. IREF Internal function of the Microprocessor. VREF Internal function of the Microprocessor. OSD R Outputs Red characters for the Service Menu. Data OSD G Outputs Green characters for the Service Menu.
- Page 52 CIRCUIT DESCRIPTION...
- Page 53 ZP94/95 CHASSIS MICROPROCESSOR DATA COMMUNICATIONS CIRCUIT DIAGRAM PYC1 Sweep Control SCL2 U204 PSD2 2H Video PWB 3DY/C PSZ2 I701 IOO1 SDA2 SDA2 IX01 SCL2 Rainforest I201 SCL2 SDA2 Main Video SDA2 Processor Chroma SCL2 Deflection PWB SDA2 SCL2 PSU1 PST1 SDA2 IS03 I403...
- Page 54 CIRCUIT DESCRIPTION...
- Page 55 CIRCUIT DESCRIPTION...
- Page 56 CIRCUIT DESCRIPTION...
- Page 57 CIRCUIT DESCRIPTION...
- Page 58 CIRCUIT DESCRIPTION...
- Page 59 CIRCUIT DESCRIPTION...
- Page 60 CIRCUIT DESCRIPTION...
- Page 61 CIRCUIT DESCRIPTION...
- Page 62 CIRCUIT DESCRIPTION...
- Page 63 CIRCUIT DESCRIPTION...
- Page 64 ZP-94/95 CHASSIS "On Screen Display, OSD" SIGNAL CIRCUIT DIAGRAM I001 IX01 Signal PWB PSZ1 Main uP Rainforest QX09 OSD Blue OSD B Analog B In Sync for Closed Caption Main QX08 OSD Green OSD G Analog G In Sync2 for Closed Caption QX07 OSD Red OSD R...
- Page 65 CIRCUIT DESCRIPTION...
- Page 66 CIRCUIT DESCRIPTION...
- Page 67 ZP-94/95 Series Chassis AUDIO and VIDEO MUTE Circuit (See also Surround Mute Circuit) SBY +11V "HV PROTECT" D031 R198 From I904 Horizontal Sweep Loss Det. Pin 3 D030 Vertical Sweep Loss Det. C070 AC Photo (From Deflection PWB) Q023 R190 Coupler R191 2H Video PWB...
- Page 68 CIRCUIT DESCRIPTION...
- Page 69 CIRCUIT DESCRIPTION ZP-94/95 SWEEP & AC LOSS DETECTION CIRCUIT SW+12V RN05 Vertical RN04 QN02 RN03 Blanking See Deflection Power DN01 From Supply Circuit QN01 Pin 11 I601 Diagram RN01 CN02 V. Blk. DN02 SPOTPROTECT CN01 DN03 RN02 DN14 24V P/P DN15 RN10 RN07...
- Page 70 CIRCUIT DESCRIPTION...
- Page 71 ZP-94/95 Series Chassis SURROUND MUTE Circuit (See also Audio Video Mute Circuit) PSU2 PMU1 Surround ERR Mute Module PSU1 IS01 Mute = Lo IS15 QS06 RSF7 Mute DS27 RSF5 VMute F. Spk Off F. Spk Off CSK01 CENTER DS26 RSF6 Audio CSJ9 CSpkOff...
- Page 72 CIRCUIT DESCRIPTION Jumper Connector D024 R100 R0C5 KEY-IN1 CLOCK I001 MicroProcessor...
- Page 73 ZP-94/95 SERIES CHASSIS VIDEO SIGNAL PATH (Main & Terminal) Lum/Audio Selector IC I401 I403 Q405 Q406 Front Control PWB PinP Yout2 PinP VY S Det. Avx 3 In Aux Input 3 S-Y3 PinP C Cout2 PinP C S-C3 S-3 In Q404 Q408 Q403...
- Page 74 CIRCUIT DESCRIPTION...
- Page 75 CIRCUIT DESCRIPTION...
- Page 76 ZP-94/95 SERIES CHASSIS COMPONENT SIGNAL PATH (Main & Terminal) U205 Lum/Audio Selector IC Terminal PWB Signal PWB PFC1 I205 Component 2 PST2 I406 I401 Inputs Q232 Q439 Q427 Cr/Pr2 Cr/Pr Cr/Pr Cr/Pr1 Q234 Q229 Q438 Q426 Cb/Pb Cb/Pb2 Cb/Pb Q230 Q231 Comp 2 for Q226...
- Page 77 CIRCUIT DESCRIPTION...
- Page 78 ZP-94/95 SERIES CHASSIS CHROMA AFTER FLEX CONVERTER SIGNAL PATH SW9V Signal PWB 2H VIDEO PWB YCBCR SUPER MATRIX U205 CONVERTER IX03 PFC2 PSZ2 2H CB 2H B 2H CB 2H CR 2H CB IX04 2H CR 2H CR 2H R IX01 IX02 CR/I...
- Page 79 CIRCUIT DESCRIPTION...
- Page 80 ZP-94/95 SERIES CHASSIS SYNC SIGNAL PATH Lum/Audio Selector IC Aux Input 3 SIGNAL PWB 1 of 2 I401 Composite 3 S Det. Avx 3 In S-Y3 PST2 Lo = MAIN I005 S-C3 S-3 In Hi = SUB Q210 Q403 Front Control PWB VOut1 Q019 Q018...
- Page 81 CIRCUIT DESCRIPTION...
- Page 82 ZP-94/95 SERIES CHASSIS MAIN/COMPONENT SYNC SEPARATION SIGNAL PATH I202 I207 V.Sync Out Select 3 SIGNAL PWB I201 Main Video/ Q223 Select 3 Chroma See Video Signal Path Select 3 Hi : Main NTSC Q224 Lo : Main Component I203 H.Sync Out Select 4 Hi : Sub NTSC Lo : Sub Component...
- Page 83 CIRCUIT DESCRIPTION...
- Page 84 CIRCUIT DESCRIPTION...
- Page 85 CIRCUIT DESCRIPTION...
- Page 86 ZP94/95 CHASSIS A.B.L. CIRCUIT DIAGRAM SW +9V QX13 RX34 PSZ2 RX33 RX32 DX02 RX35 2H Video RX37 CX32 CX31 RX36 CX19 CX34 Signal Sub DX03 PSZ1 SDA2 SDA2 SCL2 SCL2 See uP Data Signal TH01 Path To Anodes High Voltage B+ 120V V2 Focus RH67 To QH01...
- Page 87 CIRCUIT DESCRIPTION...
- Page 88 CIRCUIT DESCRIPTION ZP-94/95 SWEEP & AC LOSS DETECTION CIRCUIT SW+12V RN05 Vertical RN04 QN02 RN03 Blanking See Deflection Power DN01 From Supply Circuit QN01 Pin 11 I601 Diagram RN01 CN02 V. Blk. DN02 SPOTPROTECT CN01 DN03 RN02 DN14 24V P/P DN15 RN10 RN07...
- Page 89 CIRCUIT DESCRIPTION...
-
Page 90: Troubleshooting
Troubleshooting MAIN CHASSIS (POWER / DEFLECTION P.W.B.) CONVERGENCE HEAT SINK SK01: Digital SERVICE Convergence Unit IK04 IK05 SWITCH PSD1 IK01 QK01 QH01 YOKE PLUGS REAR VIEW R630 V.Size D656 Adj. RH44 D657 R686 High Voltage ADJ. H.Size RH44 Q657 Adj. HD DP37 Red LED DP29... - Page 91 Troubleshooting SMALL SIGNAL P.W.B. DIAGRAM MICROPROCESSOR IC01 I001 DIGITAL BOARD VIDEO HC4051 SURROUND PWB LINE COMB I010 U205 FLEX U202 U201 U204 Conv. PinP Main Tuner Tuner PinP Unit TERMINAL PWB REAR VIEW...
- Page 92 Troubleshooting CRT AND CONTROL P.W.B. DIAGRAM SHORT TO P851 KILL THE R879 COLOR PTSG P852 E831 Cathode GREEN SHORT TO P801 KILL THE R829 COLOR PTSR P802 E801 Cathode SHORT TO P8A1 KILL THE COLOR PTSB P8A2 E8A1 CATHODE BLUE...
- Page 93 Troubleshooting CHASSIS SUB POWER P.W.B. PQD1 PQS1 PQD2 PQU1 PQS2 PQU2 F901 6 Amp D912 Audio F SW +29V S901 GREEN I905 D901 D927 REAR STBY +7V VIEW GREEN D903 IC POWER D931 MONITOR RED I907 SW +5V GREEN D949 I901 STBY +11V GREEN...
- Page 94 Troubleshooting CONTROL P.W.B. MENU SOURCE VOL - VOL + CH - CH + POWER SM09...
- Page 95 Troubleshooting No Raster Is Power LED on Control Panel on? Is Red LED Blinking on SMPS? Turn off power wait (3) seconds, turn ON carefully Is voltage at pin(4) of I901 14v-18v? inspect all Green LED’s on SMPS. Did all 5 LED’s turn off at the same time? Check D904,R905,R906,C907,F901,R902 Find which LED fails to light or dims first on SMPS.
- Page 96 Appendix 1 Zenith D3 Flexcoverter Description...
- Page 97 Appendix 1 DIAGRAM A Signal ACCEPTED Image DISPLAYED *AVSL: *AVSL of Active Video 1080i Lines Scan Lines DTV at 480p in 4:3 Aspect Ratio 4:3 ASPECT RATIO 480p OF IMAGE DISPLAY IN 4:3 SCREEN NTSC at 270i in 4:3 Aspect Ratio (Broadcast or Cable) 1080i NTSC at 480i...
Need help?
Do you have a question about the IQC50H94 and is the answer not in the manual?
Questions and answers