Sanyo DP23845 Service Manual
  1. Manuals
  2. Brands
  3. Sanyo Manuals
  4. TV
  5. DP23845
  6. Service manual
Sanyo DP23845 Service Manual

Sanyo DP23845 Service Manual

Remote control digital color television
Hide thumbs Also See for DP23845:
Table of Contents

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . . 3 - 14
Power Failure Circuit . . . . . . . . . . . . . . . 15
Mechanical Disassemblies . . . . . . . 16 - 17
Chassis Electrical Parts List . . . . . . 18 - 33
Cabinet Parts List . . . . . . . . . . . . . . . . . . 34
Locations . . . . . . . . . . . . . . . . . . . 35 - 39
Block Diagrams . . . . . . . . . . . . . . . . 40 - 45
Control Port Functions. . . . . . . . . . . 49 - 50
Schematic Notes . . . . . . . . . . . . . . . . . . . 51
Pin Layouts. . . . . . . . . . . . . . . . . . . . . . . . 51
Capacitor and Resistor Codes . . . . . . . . 52
Schematic Diagrams . . . . . . . . . . . . 53 - 64
DP23845, N2TF, PRODUCT CODE 111377005
Remote Control Digital
Color Television
AS
FILE NO.
DP23845
ORIGINAL VERSION
Chassis No. 23845-00
NOTE: Match the Chassis No. on
the unit's back cover with
the Chassis No. in the
Service Manual.
If the Original Version
Service Manual Chassis
No. does not match the
unit's, additional Service
Literature is required. You
must refer to "Notices" to the
Original Service Manual
prior to servicing the unit.
Specifications
Power Rating . . . . . . . . . . . . . . . . . . . . . . . . 120VAC
Antenna Input Impedance . . . . . . . . . . . . . . . . . 75Ω
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
01, 14-94, 95-125 (CATV)
Remote Ready . . . . . . . . . . 25 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 2.0 W/CH
Intermediate Frequency
Picture IF Carrier . . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . V230W1-L02
Cabinet Dimensions
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 692mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385mm
Depth including base . . . . . . . . . . . . . . . . 181mm
REFERENCE No.
(U.S.A.)
(CANADA)
92W (Avg), 1.6A (Max)
UHF/VHF/CATV
14 - 69 (UHF),
SM
780108

Advertisement

Table of Contents
loading

Related Manuals for Sanyo DP23845

Summary of Contents for Sanyo DP23845

  • Page 1: Table Of Contents

    Height ......385mm Depth including base ....181mm DP23845, N2TF, PRODUCT CODE 111377005 REFERENCE No.

  • Page 2: Safety Instructions

    SAFETY INSTRUCTIONS SAFETY PRECAUTIONS READING SHOULD NOT EXCEED 750 mV. 1. Comply with all caution and safety-related notes provided AC VOLTMETER on the side of the cabinet, inside the cabinet, and on the (5000 ohms per volt or more sensitivity) chassis, 2.

  • Page 3: Service Adjustments

    SERVICE ADJUSTMENTS GENERAL This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the ser- vice adjustments. Volume – Enter Service Menu ON-SCREEN SERVICE MENU SYSTEM 1. Enter the Service Menu: •...
  • Page 4 ON-SCREEN SERVICE MENU Name Initial Data Note V ENH GAIN TV RF input V ENH GAIN OTHER Except RF V ENH MAX POINT TV RF input V ENH MAX POINT OTHER Except RF V ENH SLICE LEVEL TV RF input V ENH SLICE LEVEL OTHER Except RF FENH TV...
  • Page 5 Name Initial Data Note HUE–480i/p 480i/p input TOF TV RF input TOF OTHER Except RF Y–CLAMP–MAIN Except 480i/p Y–CLAMP–480i 480i input Y–CLAMP–480p 480p input C–CLAMP–MAIN Except 480i/p C–CLAMP–480i 480i input C–CLAMP–480p 480p input C–CLAMP F–MAIN Except 480i/p C–CLAMP F–480i 480i input C–CLAMP F–480p 480p input COL–KILLER TV...
  • Page 6 Name Initial Data Note C NOISE OTHER Except RF 480i SUB–CONT Component (480i) input (Difference) ↓ 480i SUB–BRIGHTNESS ↓ 480i SUB–COLOR ↓ 480i SUB–TINT ↓ 480i SUB–SHARP 480p SUB–CONT Component (480p) input (Difference) ↓ 480p SUB–BRIGHTNESS ↓ 480p SUB–COLOR ↓ 480p SUB–TINT ↓...
  • Page 7 Name Initial Data Note 1080i D SUB-CONT DVI(1080i) input (Difference) ↓ 1080i D SUB-BRIGHT ↓ 1080i D SUB-COLOR ↓ 1080i SUB-TINT ↓ 1080i SUB-SHARP AUTO CONTRAST Composite, S, Component input, Picture: Auto ↓ AUTO TINT ↓ AUTO COLOR ↓ AUTO BRIGHT ↓...
  • Page 8 Name Initial Data Note WHITE-720p R 720p (Component) input, White Balance (Difference) ↓ WHITE-720p G ↓ WHITE-720p B BLACK-720p R 720p (Component) input, Black Balance (Difference) ↓ BLACK-720p G ↓ BLACK-720p B WHITE-1080i R 1080i (Component) input, White Balance (Difference) ↓...
  • Page 9 Name Initial Data Note GAMMA APL Gamma Threshold NOSIG Select Sync. BSCB Cut of Sub-Bass or Setup of Boost BSCT Cut of Sub-Treble or Setup of Boost SUB-BASS Setup of Cut Level of Sub Bass and Boost Level SUB-TREBLE Setup of Cut Level of Sub Treble and Boost Level BBE-LOW Setup of Low-Pass Boost Level (Lo contour) BBE-HIGH...
  • Page 10 Name Initial Data Note HSC1 D NORMAL HSC2 N FULL HSC2 N JUST HSC2 N ZOOM HSC2 N NORMAL HSC2 D FULL HSC2 D JUST HSC2 D ZOOM HSC2 D NORMAL HST FULL HST JUST HST ZOOM HST NORMAL VST FULL VST JUST VST ZOOM VST NORMAL...
  • Page 11 Name Initial Data Note VUP 720p D VUP 720p A VUP 1080i D VUP 1080i A VSC 480i D VSC 480p D VSC 720p D VSC 720p A VSC 1080i D VSC 1080i A HSC1N 480i D HSC1N 480p D HSC1N 720p D HSC1N 720p A HSC1N 1080i D...
  • Page 12 Name Initial Data Note 1080I DATA2 1080I DATA3 1080I DATA4 V RANGE 480i R Gain 480i D R Gain 480p D R Gain 720p D R Gain 720p A R Gain 1080i D R Gain 1080i A G Gain 480i D G Gain 480p D G Gain 720p D G Gain 720p A...
  • Page 13 Name Initial Data Note B offAD 1080i A B off 480i D B off 480p D B off 720p D B off 720p A B off 1080i D B off 1080i A R001 ROM Correction Data ROM Correction Data ROM Correction Data ↓...
  • Page 14 SERVICE ADJUSTMENTS (Continued) The White Balance Level adjustment data will be written WHITE BALANCE ADJUSTMENT automatically in the following Service Menu: Composite (External Video Input) No 0A7 (R), 0A8 (G), 0A9 (B) S (Y/C) No.0B3 (R), 0B4 (G), 0B5 (B) 1.

  • Page 15: Power Failure Circuit

    POWER FAILURE CIRCUIT CPU (IC801) is programmed so the set will go to the stand- History of Power Failures (Item No. 0C9) by mode when there is circuit failure as described below. (Refer to “Block Diagram Power Lines” and “Block Failure Name Data Diagram Power Board.”)
  • Page 16 MECHANICAL DISASSEMBLY TUNER CAUTION: This LCD TV uses several different kinds of CATV screws. Using the correct screw is neces- sary to prevent damage. Lead wires must be redressed to their previous locations after servicing. STAND REMOVAL Note: Position TV face down on a padded or cush- ioned surface to protect the screen and finish.
  • Page 17 MAIN BOARD REMOVAL Remove 5 screws (E: 3X10) to remove the main board Hook Hook CONTROL with the terminal base (TMNL/B) and audio output jacks (MO/JACK) (assembly parts). CH/HLD RC BOARD REMOVAL Remove a screw (F: 4X14) to remove the RC board. POWER BOARD REMOVAL TMNL/B Remove 4 screws (G: 3X10) to remove the power board...

  • Page 18: Chassis Electrical Parts List

    CHASSIS ELECTRICAL PARTS LIST CAUTION: To Protect against electrical shock and for continued product safety, refer to SAFETY PRECAUTIONS, and PRODUCT SAFETY NOTICE on Page 2. PRODUCT SAFETY NOTICE PRODUCT SAFETY SHOULD BE CONSIDERED WHEN A REPLACEMENT IS MADE IN ANY AREA OF A RECEIVER. COMPONENTS INDICATED BY A STAR (#) IN THIS PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS IN WHICH SAFETY CAN BE OF SPECIAL SIGNIFICANCE.

  • Page 19: Ceramic

    Schematic Schematic Part No. Part No. Description Description Location Location C633 403 279 0106 CERAMIC 0.1U Z C876 403 309 1400 CERAMIC 1U Z C634 403 279 0106 CERAMIC 0.1U Z 403 336 5600 CERAMIC 1.0U Z C641 404 084 2903 ELECT 1000U M C877...
  • Page 20 Schematic Schematic Part No. Part No. Description Description Location Location C1623 403 419 9303 ELECT 1000U M C2044 403 279 0106 CERAMIC 0.1U Z C1624 403 419 9402 ELECT 680U M C2046 403 387 4904 ELECT 100U M 6.3V # C1625 404 088 2909 CERAMIC 1000P M 250V...
  • Page 21 Schematic Schematic Part No. Part No. Description Description Location Location C3001 403 345 6605 CERAMIC 1U Z C4036 403 345 6605 CERAMIC 1U Z C3002 403 345 6605 CERAMIC 1U Z C4038 403 364 5900 CERAMIC 0.22U K C3003 403 345 6605 CERAMIC 1U Z C4039...
  • Page 22 Schematic Schematic Part No. Part No. Description Description Location Location C7232 403 279 0106 CERAMIC 0.1U Z D4002 407 201 2721 DIODE RB051L-40 C7234 403 279 0106 CERAMIC 0.1U Z J4001 407 210 5403 DIODE RB551V-30-TE-17 C7265 403 393 2109 CERAMIC 4.7U K 6.3V...
  • Page 23 Schematic Schematic Part No. Part No. Description Description Location Location COILS L7263 645 036 3894 INDUCTOR, 220 OHM # LF1600 645 019 3873 LINE FILTER L7264 645 036 3894 INDUCTOR, 220 OHM L041 645 075 0564 INDUCTOR, 33U M L7267 645 036 3894 INDUCTOR, 220 OHM L7268...
  • Page 24 Schematic Schematic Part No. Part No. Description Description Location Location Q672 405 014 4509 TR 2SC2412K-T-96-R 405 173 9803 TR 2SC3928A1R 405 014 4608 TR 2SC2412K-T-96-S 405 173 9902 TR 2SC3928A1S 405 015 8724 TR 2SC2812-L6-TB Q851 405 002 0308 TR 2SA1037K-T-96-R 405 015 8922 TR 2SC2812-L7-TB...
  • Page 25 Schematic Schematic Part No. Part No. Description Description Location Location Q1600 405 014 4509 TR 2SC2412K-T-96-R Q1612 405 014 4509 TR 2SC2412K-T-96-R 405 014 4608 TR 2SC2412K-T-96-S 405 014 4608 TR 2SC2412K-T-96-S 405 015 8724 TR 2SC2812-L6-TB 405 015 8724 TR 2SC2812-L6-TB 405 015 8922 TR 2SC2812-L7-TB...
  • Page 26 Schematic Schematic Part No. Part No. Description Description Location Location Q2121 405 014 4509 TR 2SC2412K-T-96-R Q2181 405 014 4509 TR 2SC2412K-T-96-R 405 014 4608 TR 2SC2412K-T-96-S 405 014 4608 TR 2SC2412K-T-96-S 405 015 8724 TR 2SC2812-L6-TB 405 015 8724 TR 2SC2812-L6-TB 405 015 8922 TR 2SC2812-L7-TB...

  • Page 27: Fusible

    Schematic Schematic Part No. Part No. Description Description Location Location 405 173 9803 TR 2SC3928A1R NOTES: 405 173 9902 TR 2SC3928A1S Read description of the Resistor as follows: Q4010 405 014 4509 TR 2SC2412K-T-96-R 405 014 4608 TR 2SC2412K-T-96-S (Example) 405 015 8724 TR 2SC2812-L6-TB CARBON...
  • Page 28 Schematic Schematic Part No. Part No. Description Description Location Location RB7206 645 021 4943 R-NETWORK 22X4 1/16W R696 401 150 6001 MT-GLAZE 0.000 ZA 1/10W 645 037 0663 R-NETWORK 22X4 0.063W R697 401 150 6001 MT-GLAZE 0.000 ZA 1/10W RB7207 645 021 4943 R-NETWORK 22X4 1/16W R698...
  • Page 29 Schematic Schematic Part No. Part No. Description Description Location Location R884TM 401 024 7440 CARBON 10K JA 1/6W R1061 401 256 2709 MT-GLAZE 75 JA 1/10W R886 401 162 3708 MT-GLAZE 4.7K JA 1/10W R1068 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R887 401 162 3708 MT-GLAZE...
  • Page 30 Schematic Schematic Part No. Part No. Description Description Location Location R1644 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R1962 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R1645 401 150 5905 MT-GLAZE 10K JA 1/10W R1964 401 255 6500 MT-GLAZE 100 JA 1/10W R1647 401 150 5905 MT-GLAZE...
  • Page 31 Schematic Schematic Part No. Part No. Description Description Location Location R2183 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R4083 401 150 6100 MT-GLAZE 2.2K JA 1/10W R2186 401 150 6100 MT-GLAZE 2.2K JA 1/10W R4087 401 256 4109 MT-GLAZE 56 JA 1/10W R2187 401 256 6905 MT-GLAZE...
  • Page 32 Schematic Schematic Part No. Part No. Description Description Location Location R7238 401 162 2701 MT-GLAZE 180 JA 1/10W R8063 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R7240 401 150 5905 MT-GLAZE 10K JA 1/10W R8064 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R7241 401 256 0002 MT-GLAZE...
  • Page 33 Schematic Schematic Part No. Part No. Description Description Location Location # EL901 SURGE-ABSORBERS 645 075 4999 LCD (V230W1-L02 REVC1) SC1018 645 076 3502 SURGE-ABSORBER 645 079 1192 LCD (V230W1-L02 REVC2) # F1600 SC1019 645 076 3502 SURGE-ABSORBER 423 022 2102 FUSE 250V 4A F1600A 645 016 0479...

  • Page 34: Cabinet Parts List

    610 323 3475 DEC AV SHEET-N2TE 610 320 2730 COVER BTM-N2TE 610 320 2969 STAND TOP-N2TE 610 320 2952 STAND BASE-N2TE 610 320 2747 DEC RC-N2TE 645 066 7213 BADGE, SANYO*35.0X7.5L35.0 610 313 4093 DEC SHEET VIZON — 34 —...

  • Page 35: Component And Testpoint Locations

    COMPONENT AND TESTPOINT LOCATIONS CONTROL BOARD PART SIDE R1903 SC191 R1901 R1908 SW1901 SW1904 SW1906 SW1902 VOL– R1906 K19A CH– POWER VOL+ CONTROL BOARD FOIL SIDE PWB,CONTROL N2TF B10N1550B **** SC193 J1901 J1902 RC BOARD PART SIDE D1964 A1961 SC1961 C1961 RC BOARD FOIL SIDE PWB,RC N2TF...
  • Page 36 COMPONENT AND TESTPOINT LOCATIONS (Cont.) MAIN BOARD PARTS SIDE R1050 C1010 SC1009 R7244 R7239 R7234 R7301 R7551 R1049 C1009 R7243 R7238 R7233 R7302 SC1008 R7554 Q687 Q7552 K7202 R7303 Q7551 R687 R7304 Q686 R7305 TP681 R686 R7306 R7307 SC05 R7308 SC04 R4113 R7309...
  • Page 37 MAIN BOARD FOIL SIDE — 37 —...
  • Page 38 COMPONENT AND TESTPOINT LOCATIONS (Cont.) POWER BOARD PARTS SIDE C1628 C1632 R1629 R1630 C1626 IC1600 C1617 C1622 L1607 C1623 HEAT SINK (D1610&D1613) L1600 C1615 D1610 D1613 C1614 T1601H9 T1601H16 T1601 IC1601H1 T1601H1 T1601H8 R1626 C1608H1 IC1601 C1608H2 IC1601H2 BLACK WHITE TPGND K1600 VA1600...
  • Page 39 POWER BOARD FOIL SIDE SCR1603 SCR1604 R1655 R1656 Q1605 R1629 R1649 R1630 R1653 Q1611 R1642 Q1609 Q1612 R1616 D1613H1 D1613H2 D1610 D1613 Q1601 D1607 D1603 T1601H9 T1601H16 T1601 T1601H8 T1601H1 R1626 R1607 IC1601H2 TPGND K1600 VA1600 D1604 F1600B SCR1602 — 39 —...
  • Page 40 BLOCK DIAGRAM POWER LINES — 40 —...

  • Page 41: Block Diagrams

    BLOCK DIAGRAM SIGNAL LINES — 41 —...
  • Page 42 BLOCK DIAGRAM POWER BOARD — 42 —...
  • Page 43 IC BLOCK DIAGRAMS IP Converter/Screen Controller/LVDS Transmitter (IC7201) Line Doubler (for 20V) 656/601 Sharpness H-Scaling 656/601 V-Scaling Decoder (Y Only) (4/5) Input Line Tripler (for 15V) Tint Matrix Contrast Brightness γ LVDS Test LVDS -Correct Output Pattern Insert Transmitter Black-Expander I2C-Bus SCL SDA Digital Decoder (IC2001)
  • Page 44 IC BLOCK DIAGRAMS (CONT.) Audio Processor (IC3001) TONE TONE MONa SR FIL OUTa LINEa IN1a IN2a 2 VOL 1 TONE VOL 2 IN3a 3 IN4a 4 NJRC IICBUS Surround Interface "eala" & Simulated Stereo IN1b IN2b 29 VOL 1 VOL 2 TONE IN3b 28 IN4b 27...
  • Page 45 AD Converter (IC4001) Analog Interface R/G/B 8X3 R/G/B or YPbPr Clamp or YCbCr R/G/B or YPbPr HSYNC 0 HSYNC 1 DATACK VSYNC 0 HSOUT VSYNC 1 Sync VSOUT SOGIN 0 Processing and SOGOUT SOGIN 1 Clock COAST Generation R/G/B 8X3 REFOUT FILT CKINV...

  • Page 46: Trouble Shooting Flow Charts

    TROUBLE SHOOTING FLOW CHARTS NO POWER fuse (F1600) Check: Varistor (VA1600), Diode Bridge (D1604), open? IC (IC1601), Diode (D1612), Thermistor (R1609) the voltage Check: to "5V_STBY" line IC (IC1601,IC1600), Diode (D1600,D1601, supplied? D1605,D1606,D1610), Transistor (Q1607) All 0V (except '5V_STBY' line) the voltage to all lines Check: around supplied?
  • Page 47 NO VIDEO Check: RF(TV) only All Inputs? Line: A101 17pin - IC1201 5pin Parts: Around A101 (TU_IF), Q101 AV1 only Check: Line: IC1201 1pin (Composite Video: CV) AV2 only IC1201 3pin (S-Input: Y) IC2001 86pin - Q2121 - Q2122 (S-Input: C) Component Check: (480p,720p,1080i)
  • Page 48 TROUBLE SHOOTING FLOW CHARTS (CONT.) NO AUDIO All Inputs ? Is there Check: signal at speaker Speaker (SP901, SP902) terminal ? Check: Is there signal at IC001 2pin (L) Line: IC001 1pin - Q002(C) - IC801 (CPU) 14pin (Mute) Parts: Around IC001 (Audio AMP.), Q002 or 4pin (R) ? Check: Parts: Around IC3001 (Audio SW, Control, Surround)

  • Page 49: Control Port Functions

    CONTROL PORT FUNCTIONS System Control (CPU : IC801) Pin Name Function I/O Description FACT SW Bus SW for factory PC, Factory PC : High POWER-2 Power port for LCD panel, Panel On : Low IIC bus control for factory, Bus Release Request : Low STATUS IIC bus control for factory, Bus Release Request : Low INTO...
  • Page 50 CONTROL PORT FUNCTIONS (Cont.) I/O Expander (IC899) Pin Name Function I/O Description SERIAL OUTPUT – BUS SCL IIC Bus port, SCL : Clock BUS SDA IIC Bus port, SDA : Data P-FAIL 1 Power Failure for Digital Power Source, Failure : Low P-FAIL 2 Power Failure for Panel, Failure : Low P-FAIL 3...

  • Page 51: Pin Layouts

    SCHEMATIC DIAGRAMS NOTES ON SCHEMATIC DIAGRAMS 1. All resistance values in ohms K=1,000 M=1,000,000. 2. Unless otherwise noted on schematic, all capacitor values less than 1 are expressed in µF (Micro Farad), and the values more than 1 are in pF . 3.
  • Page 52 Y ......Wire Wound C ......Solid D ......Carbon Film W ......Wire Wound For parts or service contact SANYO Fisher Service Corporation 21605 Plummer Street Chatsworth, CA 91311 (U.S.A.) 300 Applewood Crescent, Concord, Ontario L4K 5C7 (CANADA) September / 2005 / 2000 SMC Printed in U.S.A.

  • Page 53: Lcd

    MODEL DP23845 Chassis No. 23845-00 SCHEMATIC DIAGRAMS <CH–> <CH+> <POWER> <VOL–> <VOL+> Control SW1904 SW1906 S10B SCREW EL901 S10B SW1903 SW1902 SW1901 LCD Module 3530G EL901 3530G S10B SC191 SC192 SC193 S10B S10B SC194 R1906 3530G 3530G 3530G R1902 1/10GJ...
  • Page 54 MODEL DP23845 Chassis No. 23845-00 SCHEMATIC DIAGRAMS K8091 B4J11B0230N IC1201 Video (Y/V) SW R1213 NJM2535MP R1203 1/10GZ0C 1/10GJ1MC R1201 R1208 R8001 R8005 TV_CVBS 1/10GJ1MC 1/10GZ0C 1/10GZ0C 3.3V_SCR R2005 1/10GZ0C VIN3 AV_SW2 R1209 1/10GZ0C 9V_ANALOG VIN2 AV1_Y 1/10GZ0C R8002 L1201 C1201...
  • Page 55 MODEL DP23845 Chassis No. 23845-00 SCHEMATIC DIAGRAMS To Panel J7599 1/10GZ0C C4070 L4016 25KZ SCREW 0.1LZF L2FB2R2MG C7559 C7557 9V_ANALOG 6.3KK 25KZ <SIDE A> <SIDE B> 0.1LZF C4071 4.7LZB J656 16EM101V J651 SC01 SC11 1/10GZ0C 1/10GZ0C :16EM10KE 5V_PANEL R7551 8 9 10 11 12 13 14...

Table of Contents