Allstar HT32744 Service Manual

ASFILE NO.SERVICE MANUAL Remote Control DigitalColor TelevisionHT32744 (U.S.A.)(CANADA)ORIGINAL VERSIONChassis No. 32744-00NOTE: Match the Chassis No.

— 10 —SERVICE ADJUSTMENTS (Cont.)Table 1. ON-SCREEN SERVICE MENU (Continued)No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DAT

— 11 —No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DATA HEX DATA BINARY236 RZVAS 00 00 00000000 RF-ZOOM V_ASPECT237 RZZSW 0

— 12 —SERVICE ADJUSTMENTS (Cont.)Table 1. ON-SCREEN SERVICE MENU (Continued)No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DAT

— 13 —PROGRAM CODESThe microprossesor used in this model is a multi-purpose type and is used in several different models. To ensure properoperation an

— 14 —SERVICE ADJUSTMENTS (Continued)ANTENNA CONNECTIONSThis receiver is designed for UHF/VHF and Digital RF recep-tion. A 75 ohm terminal is provided

— 15 —Drive Level Adjustment13. Select “Drive Level Adjustment” Menu (between NO. 08E and NO. 0B0) with ▲ or ▼ key. The Menu dis-play will appear.14.

— 16 —SERVICE ADJUSTMENTS (Continued)HIGH VOLTAGE HOLD-DOWN TESTEvery time the receiver is serviced, the HIGH VOLTAGE HOLD-DOWN circuit must be tested

PINCUSHION CORRECTION ADJUSTMENT1. Connect a color-bar generator to the analog antennaterminal and select a crosshatch pattern.2. Set the picture cont

— 18 —SERVICE HINTSPOWER FAILURE DETECTORThis unit is equipped with a Power Failure Detector function included in the CPU which checks for an abnormal

— 19 —MECHANICAL DISASSEMBLIESCABINET BACK REMOVAL1. Refer to Figure 1, remove 13 screws.2. Pull off cabinet back and remove.CHASSIS REMOVAL1. Remove

— 2 —SAFETY PRECAUTIONSWARNING: The chassis of this receiver has a floatingground with the potential of one half the AC line voltage inrespect to eart

— 20 —CHASSIS ELECTRICAL PARTS LISTCAPACITORSNOTES:Read description of the Capacitor as follows:(Example)CERAMIC 100P K 50VRated VoltageTolerance Symb

— 21 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionMAIN PC BOARDCAPACITORSC100 403 224 6108 CERAMIC 0.01U K 50VC101 404 084

— 22 —C3403 404 084 3801 ELECT 1U M 50VC3404 404 084 3801 ELECT 1U M 50VC3406 403 343 4603 CERAMIC 0.022U K 50VC3407 403 224 5804 CERAMIC 2200P K 50VC

— 23 —COILSL001 645 008 2894 INDUCTOR, 5.6U K645 016 3104 INDUCTOR, 5.6U KL101 645 008 2894 INDUCTOR, 5.6U K645 016 3104 INDUCTOR, 5.6U KL651 645 045

— 24 —Q2910 (Cont.)405 163 1602 TR 2SC2812N-L6-TB405 163 1701 TR 2SC2812N-L7-TB405 173 9803 TR 2SC3928A1R405 173 9902 TR 2SC3928A1SQ2942 405 014 4509

— 25 —R833 401 256 3805 MT-GLAZE 1.5K JA 1/10WR834 401 162 3708 MT-GLAZE 4.7K JA 1/10WR835 401 162 3708 MT-GLAZE 4.7K JA 1/10WR836 401 162 3708 MT-GLA

— 26 —SchematicLocationPart No.DescriptionR2953 401 026 9303 CARBON 47 JA 1/6WR2954 401 256 2709 MT-GLAZE 75 JA 1/10WR2955 401 256 2709 MT-GLAZE 75 JA

— 27 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionC622 404 085 4500 ELECT 2200U M 25VC624 404 096 2403 ELECT 470U M 160VC6

— 28 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionINTEGRATED CIRCUITS★ IC501 409 374 0607 IC LA7846N★ IC601 409 169 5800 I

— 29 —SchematicLocationPart No.DescriptionFRONT PC BOARDCAPACITORSC001 404 084 3900 ELECT 10U M 50VC006 404 084 4204 ELECT 4.7U M 50VC007 404 089 2700

GENERALThis set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.ON-SCREEN SE

— 30 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionSW1904 645 006 9673 SWITCH, PUSH (CH ▲)645 027 7382 SWITCH, PUSH (CH ▲)6

— 31 —SchematicLocationPart No.DescriptionC7140 404 084 2507 ELECT 47U M 10VC7146 403 279 0106 CERAMIC 0.1U Z 25VC7147 404 084 2507 ELECT 47U M 10VC82

— 32 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionQ1223 405 134 5925 TR 2SA1037AK T146 R405 147 2205 TR 2SA1037AK T146 S40

— 33 —SchematicLocationPart No.DescriptionQ7030 405 134 5925 TR 2SA1037AK T146 R405 147 2205 TR 2SA1037AK T146 S405 002 0308 TR 2SA1037K-T-96-R405 002

— 34 —SchematicLocationPart No.DescriptionSchematicLocationPart No.Description405 173 9803 TR 2SC3928A1R405 173 9902 TR 2SC3928A1SQ8234 405 014 4509 T

— 35 —SchematicLocationPart No.DescriptionR7010 401 150 6209 MT-GLAZE 1K JA 1/10WR7011 401 162 3708 MT-GLAZE 4.7K JA 1/10WR7012 401 162 4002 MT-GLAZE

— 36 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionC2330 404 084 2903 ELECT 1000U M 16VC2331 404 084 2705 ELECT 10U M 16VC

— 37 —SchematicLocationPart No.DescriptionQ2333 405 134 5925 TR 2SA1037AK T146 R405 147 2205 TR 2SA1037AK T146 S405 002 0308 TR 2SA1037K-T-96-R405 002

— 38 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionR2348 401 255 6500 MT-GLAZE 100 JA 1/10WR2349 401 256 5908 MT-GLAZE 2.7K

— 39 —SchematicLocationPart No.DescriptionTRANSISTORSQ711 405 011 8401 TR 2SC1740S-Q405 011 8500 TR 2SC1740S-R405 011 8609 TR 2SC1740S-S405 012 2002 T

— 4 —SERVICE ADJUSTMENTS (Cont.)INITIAL BUS DATA SETUP (Cont.)15. Select NO. 117 VPS (V Position) with ▲ or ▼ key. Adjust the data with number keys fo

— 40 —SchematicLocationPart No.DescriptionSchematicLocationPart No.DescriptionVELOCITY MODULATION PC BOARDCAPACITORSC1705 404 092 1905 ELECT 100U M 50

— 41 —CABINET PARTS LIST1 610 311 0110 CABINET FRONT-H3ELM2 610 268 9648 CRT MTG WASH (BTM 2 USED)610 268 9662 CRT MTG WASH (TOP 2 USED)3 412 053 3905

— 42 —COMPONENT AND TESTPOINT LOCATIONSMAIN BOARD PARTS SIDEK7IPG-19SWD-YIN1920DMAVVIDEO12VIDEO:H100+3/W130-155/35M121920192012455115224411516 3010201

— 43 —MAIN BOARD FOIL SIDEXXXXXXXXXXXX178101485411610981152411552244+1458+115163010201458145818 16110151124B10B10000 AGNDGND14V_DM14V_DMGNDGND14V_

— 44 —1234321321E1422911232112EEEEEEEDIPABLH_GNDGNDAFCH_DRIVEGNDPCCHD_DOWNGNDV_RAMP+V_RAMP-140VNCGNDMAIN+14VPWR_SWNOMAL_SWPFAIL5VALGND31VGNDGND14V_DM1

— 45 —POWER / DEFLECTION BOARD FOIL SIDEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1234123123E1914223212112EEEEEEEGNDMAIN+14VGNDNC14

— 46 —EEGNDB9VRGGNDGNDGNDIKBH1H2RSCREENGG1TE47TP47BTP47RTP47GTPIK1AA4B10B0960A B200VGND110EEHEATERK7CP1K7CP2K7CP3EEEK7CK7DK7Y1K7U1IC711IC721K7VK

— 47 —9070 6040201010081805150313013010422221114581101120213031401781014Y-OUT-ADJ2.5V3.3V5VB10B1030A115151TPY'PWB,AV-H3ABMC1001C1002C1003C1004C10

— 48 —17810141458133 515264120 120NO RADIALPWB,VIDEO-H3ABMB10B1030B1101131920323ETV9VR_OUTGNDG_OUTGNDB_OUTGNDIK_INGNDNCGNDVM_OUTVM_OUT12537481213241C2

— 49 —DIP12321EEEEB10B1040A AKDC601LF602 LF601C617C610PS601K1902K1901RL601K6FK6MK6M3PK6M2PK6M1PK6FP1K6FP2F601AF601BVA601C611JP601JP602T681AH4T681AH1

— 5 —Table 1. ON-SCREEN SERVICE MENUWhen IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should

— 50 —POWER LINESHVT402RL602Degaussing CoilRelayRL601Main Relay6.5V14VR663LINE FILTER LINE FILTERLF601F60121V9VTV14V14V_DM205VTV9VTV9VTV31VTV31VTV31VT

— 51 —MAIN CPU DATA BUS LINESIC801Main CPUM3715MA-06530pin (SCL)31pin (SDA)1pin (SCL)41pin (SDA)32pin (SCL)31pin (SDA)36pin (SCL)37pin (SDA)42pin (SCL

— 52 —SIGNAL LINESAUDIO_AMPLA42052SurroundAudio_ControlNJM1142RGBDEFPOWERAMPRGBTDA6118RGBVM AMPVIDEOIC711/21/31CRT DRIVECXA2180QMAFCH_DRIVEV_DRIVEPCCD

— 53 —IC2501 CRT DRIVER BLOCK DIAGRAM57 56 55ECR_INECB_INEY_IN58EXT_SW49VM_OUT47CLP_C48DPDT_OFF46BPH43R1_IN42G1_IN41B1_IN40YSYM139R2_IN38G2_IN37B2_IN3

— 54 —IC3601 AUDIO PROCESSOR BLOCK DIAGRAM11COMPIN8PCINT19PCINT216Vcc14GND19NOISETC15SAPTC12VGRVCAATT/INSWSTLPFWIDEBANDNRSW/FOMO/SAPCLPF"STEREO&q

IC3401 AUDIO CONTROL BLOCK DIAGRAM— 55 —IN1aMONaMONbSEL-2dB-2dBAGCAGC SR FIL1IN2a2IN3a3IN4a4VOL 1 TONETONENJRCSurround"eala"&SimulatedSt

— 56 —TROUBLESHOOTING FLOW CHARTSNO POWERIs Fuse (F601)open?YesNoCheck:• PS601 (Posistor), D601, IC601, IC602 (Q402: H-out Tr)Check:• R601 (Rush Res

— 57 —All Modes?YesNoRF onlyAV1 onlyCheck:Line: Main to AVA101 (TU_IF) 17pin - IC1201 41pinParts: TU_IFCheck:Line: AVIC1201 1pin (Composite Video)IC12

— 58 —TROUBLE SHOOTING FLOW CHARTS (Cont.)Is theresignal at speakerterminal?YesNoNoRF onlyCheck:Speaker (SP901, SP902)All Modes?Is theresignal at IC00

CONTROL PORT FUNCTIONPin Name Function I/O Description1 P11/SCL1 IIC bus clock for TV IN2 P00 Audio AMP Mute OUT Active : High3 P01 DM Reset Out OUT R

Table 1. ON-SCREEN SERVICE MENU (Continued)— 6 —SERVICE ADJUSTMENTS (Cont.)No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DATA

— 60 —March / 2004 / 2000 SMC Printed in U.S.A.For parts or service contactSANYO Fisher Service Corporation21605 Plummer StreetChatsworth, CA 91311 (

CAPACITOR AND RESISTOR CODE CHARTCAPACITOR (Example)500 C K 1500 B D ... ±0.5pFT ... +50%

— 65 — — 66 — — 67 — — 68 —MODEL HT32744 Chassis No. 32744-00LIST OF REPLACEABLE TRANSISTORSACAB7T2001827T2001812SA564A2SA10152SA933SQ,RRO,Y,GRY,GRQ,R

— 69 —— 70 —— 72 —— 71 —MODEL HT32744 Chassis No. 32744-00LIST OF REPLACEABLE DIODE7DD000197DD001927ED000257DD00021RAAMP1S1555,1S2473,1S2076,DS442,1N4

— 73 — — 74 — — 75 — — 76 —MODEL HT32744 Chassis No. 32744-00LIST OF REPLACEABLE DIODE7DD000197DD001927ED000257DD00021RAAMP1S1555,1S2473,1S2076,DS442,

— 7 —No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DATA HEX DATA BINARY164 RF-CMD 00 00 00000000 RF CTI_MODE(0)165 4I-CMD 00

— 8 —SERVICE ADJUSTMENTS (Cont.)Table 1. ON-SCREEN SERVICE MENU (Continued)No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DATA

— 9 —No. TITLEINITIAL REFERENCE INITIAL SETUP INITIAL SETUPFUNCTIONDATA HEX DATA HEX DATA BINARY1CD CFHSI 00 00 00000000 VIDEO1/2-FULL H_SIZE1CE CFHP