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Sampo 21T17 Service Manual

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SERVICE MANUAL
1、 Caution.................................................................................
2、 Specification...........................................................................
3、 BOM list ..............................................................................
4、 Alignment Procedure..................... ... ................................. ...
5、 Block Diagram....................................... ..............................
6、 Schematic Diagram........................... ......... ...........................
7 、 PCB Layout.................................... .......................................
8、 Explode View Diagram..................... .......................................
9、Troubleshooting..................... ................................................
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product
SAMPO
21T17
1
5
8
18
27
28
29
30
31

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Summary of Contents for Sampo 21T17

  • Page 1 SAMPO SERVICE MANUAL 21T17 1、 Caution……………………………………………………………………… 2、 Specification………………………………………………………………… 3、 BOM list …………………………………………………………………… 4、 Alignment Procedure………………… … …………………………… … 5、 Block Diagram………………………………… ………………………… 6、 Schematic Diagram……………………… ……… ……………………… 7 、 PCB Layout……………………………… ………………………………… 8、 Explode View Diagram………………… ………………………………… 9、Troubleshooting………………… ………………………………………… This manual is the latest at the time of printing, and does not...
  • Page 2 CAUTION: Use of controls, adjustments or procedures other than those specified herein may result in hazardous radiation exposure. CA UTION: TO REDUCE THE RISK OF CAUTION ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE RISK RISK OF OF ELECTRI ELECTRIC C PARTS INSIDE.

  • Page 3: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS CAUTION: Read all of these instructions. Save these instructions for later use. Follow all Warnings and Instructions marked on the audio equipment. 1. Read Instructions- All the safety and operating instructions should be read before the product is operated. 2.
  • Page 4 PROTECTION AND LOCATION OF YOUR SET Do not use this television set near water ... for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc. Never expose the set to rain or water. If the set has been exposed to rain or water, unplug the set from the wall outlet and refer servicing to qualified service personnel.
  • Page 5 OPERATION OF YOUR SET 18. This television set should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply at your home, consult your television dealer or local power company. For television sets designed to operate from battery power, refer to the operating instructions.
  • Page 6 Chassis M123A P/N: TMPA8823 N: TMPA8852 Certification UL. FCC.FDA Situation on matching CRT 14" 21" Slim CRT Normal Flat √ √ Pure Flat √ √ Remote Controller F, Q, R、RC111、RC65 Color System √★ (TV) NTSC √★ Sound System √ (TV) √...
  • Page 7 Notebook √☆ Favorite channel Setting √ Program prearrange √ Features Blue Background √ Channel Add/Erase √ Recall √ √☆(Disable in 2nd Software Version) V-chip √☆(Disable in 2nd Software Version) Smart Timer √ Child Lock √ X-ray Protection √ (Only in English) √☆...
  • Page 8 Position Item No. Description Qty. T8-DT17AG-MA1SM ASS'Y - SKD PARTS`TW' T8-21T17G-AVY ASS'Y - AV BD 40-21T18H-SIB1X P.C.B. SIDE AV BD 46-35146H-05X HS 5P24 550 TJC3-5Y/SCN-5Y 1 P1104B P1 - P5 FOR M. BD P904 47-RCA020-XX1 RCA SOCKET Y/W/R 1 P1101 T8-21T18G-IRY ASS'Y - RECEIVE BD 02-IRR002-XX1...
  • Page 9 13-00M24C-08P IC EEPROM 8K M24C08 (WRITE) 1 IC001 13-STV930-2BS IC STV9302B 1 IC301 13-0L7805-CVS +5V 1.5A IC L7805CV 1 IC402 13-0L7809-CVS IC L7809 SGS (TO-220) 1 IC401 13-TDA705-7AS IC TDA7057AQ (2X8W) 1 IC601 18-CB0100-JNX RES. C.F. 10 OHM 1/6W +/-5% 1 J217 18-CB0101-JNX RES.
  • Page 10 18-FG0153-JHX RES. M.O. 15K OHM 2W +/-5% 1 R404 18-GJ0332-JUX1 RES.C.C.5W 3.3KOHM +/-5% 1 R402 18-RG0228-JHX RES. WIRE ROUND 0.22 OHM 2W +/-5% 1 R620 25-BCA102-M1X CAP. ELEC 1000 UF 16V +/-20% 1 C232 25-BCB100-M1X CAP. ELEC 10 UF 16V +/-20% 8 C004;C023;C025;C311;C603;C901;C902;C907 25-RCB100-M1X CAP.ELEC 10 UF 16V +/-20%...
  • Page 11 36-HDR001-AX1 TRANSFOR HOR. DRIVE (MAGNETIC CORE) 1 T401 41-WJ0050-B00 WIRE BARE JUMPER 5MM 1 L101 41-WJ0055-B00 WIRE BARE JUMPER 5.5 MM 1 J922 J001;J009A;J101;J203;J210;J211;J907;R20 41-WJ0060-B00 WIRE BARE JUMPER 6MM 0;R204;R207;R249 41-WJ0065-B00 WIRE BARE JUMPER 6.5MM 3 J010;J208;J301 41-WJ0070-B00 WIRE BARE JUMPER 7MM 4 J011;J012;J217A;J223 J018;J022;J215;J218;J225;J303;J602;J901 41-WJ0075-B00...
  • Page 12 FOR (-)& P28/IC201 TO (+)接IC201底部地 端;FOR (-)& P29/IC201 TO (+)接IC201底部 10-79C10V-DBX DIODE ZENER 10V 1/2W 5% 地端 10-CW574C-DJX DIODE CW574CD 1 FOR C106 (DIODE“+” TO GND) 25-BFB220-M1X CAP. ELEC 22 UF 50V +/-20% 1 FOR D101 (CAPACITOR“-” TO GND) T8-0A21SG-PW2 ASS'Y - POWER BD 10-00RU3C-FBX HIGH EFFICIENCY RECTIFIER RU3C...
  • Page 13 26-ABC471-JZX CAP. CER 470 PF 50V +/-5% SL 1 C851 26-AGA221-KRX CAP.CER 220PF 250V +/-10% 1 C830 26-AIL103-KBX CAP.CER 10NF 500V +/-10% 2 C834;C805 26-AKM221-KRX CAP. CER 220 PF 1KV +/-10% 1 C833 26-AMM102-KRX CAP. CER 1000 PF 2KV +/-10% R 1 C815 26-APK222-ME4 CAP.
  • Page 14 18-CB0103-JNX RES. C.F. 10K OHM 1/6W +/-5% 3 R917;R010;R919 18-CB0223-JNX RES. C.F. 22K OHM 1/6W +/-5% 6 R613;R612;R907;R908;R909;R910 18-CB0820-JNX RES. C.F. 82 OHM 1/6W +/-5% 1 R929 18-CE0479-JNX RES. C.F. 4.7 OHM 1/2W +/-5% 1 R918 25-BCB100-M1X CAP. ELEC 10 UF 16V +/-20% 2 C919;C920 25-BCB101-M1X CAP.
  • Page 15 18-CB0471-JNX RES. C.F. 470 OHM 1/6W +/-5% 3 R525;R526;R527 18-CB0472-JNX CARBON RES. C.F. 4.7K OHM 1/6W +/-5% 3 R502;R505;R508 18-CB0681-JNX RES. C.F. 680 OHM 1/6W +/-5% 1 R523 18-CB0751-JNX RES. C.F. 750 OHM 1/6W +/-5% 3 R503;R506;R509 18-CD0104-JNX RES. C.F. 100K OHM 1/4W +/-5% 1 R521 18-FE0272-JNX RES.
  • Page 16 42-51216D-XX0 SPEAKER (50MMX120MM) 16 OHM 5W 2 W601;W602 46-35196H-02X HS 2P22 570/7 TJC3-2Y 1 P602H FOR M. BD P602 46-14026H-02X HS 2P 2468#22 570mm S11-2Y/7mm 1 P601H FOR M. BD P601 54-113970-0U0 PVC TUBE AWG NO.5 0.32 FOR L & R SPEAKING WIRE 54-114000-00X FELT TAPE (150MMX19MMX0.3MM) 4 STICK ON F.
  • Page 17 58-DA41RI-6UI INLAY REAR AV 58-DT17MP-JKT PLATE MODEL NO. T8-HS36R0-A123 ASS'Y-REMOTE 11-0BC337-0BX TRANSISTOR (NPN) BC337-40 1 Q1501 13-00AS12-13B IC AS1213B 1 IC1501 14-IRE05B-XX0 IR EMITTING DIODE TSAL6200 1 D1501 18-CB0221-JNX RES. C.F. 220 OHM 1/6W +/-5% 1 R1502 18-CB0229-JNX RES. C.F. 2.2 OHM 1/6W +/-5% 1 R1501 25-HBB479-M1X CAP.
  • Page 18 Alignment Procedure of M123A Color TV 1. FLOWCHART OF ALIGNMENT PROCEDURE Screen & Focus White balance adjustment adjustment adjustment Pincushion correction & Center & Amplitude and Sub-brightness Horizontal Amplitude OSD adjustment adjustment adjustment 2 Adjustment of B+ voltage 1) Apply 120VAC(±5V) to mains power input, and Philips standard testing pattern to RF input.
  • Page 19 Use a color analyzer to measure the white side of the screen. By changing the value of GD, BD, set the reading of the color analyzer to X=285, Y=295. ¢ Ü Separately set the brightness and contrast from min. to max., repeat the step 2 and 3 until the reading of the color analyzer is correct.

  • Page 20: Factory Settings

    Factory settings D-mode: Enter D-Mode by pressing D-Mode ON/OFF key, and then you can enter the D-mode. S-mode: Enter S-Mode by pressing VOLUME DOWN key on the unit until the volume decrease to minimum level, then press the DISPLAY key on the remote handset (don’t release the volume key) and you can enter S- mode.
  • Page 21 Menu 4 (Remote key: “4”) Item Remark CNTX Maximum contrast CNTN Minimum contrast BRTX Maximum brightness BRTN Minimum brightness COLX Maximum color COLN Minimum color TNTX Maximum tint level TNTN Minimum tint level Menu 5(Remote key: “5”) Item Remark BRTC 50% brightness COLC 50% color...
  • Page 22 Bit 3 Bit 4 Bit 5 TV£ ¬ MSP AVL: 1: yes Bit 6 AV£ ¬ MSP AVL£ º 1:yes Bit 7 MONO+SAP£ º 1£ º yes 0£ º no Bit 0 When blue background off (mute pin of CPU): 0: audio mute on 1: audio mute off Bit 1...
  • Page 23 Menu 9(Remote key: “9”) Item Remark Volume 1 Volume 25 Volume 50 V100 Volume 100 VOLMAX Max volume under hotel mode CURTCEN Center of the curtain VOLX Output gain of PIN28 of TMPA8823 or MSP34x5 PWTM When use PWM to mute and no sound when changing channel, this item should be minimum as posible Menu 10(Remote key: “0”) Item...
  • Page 24 Bit 7 Bit 0 America V-CHIP standard 1£º yes 0£º no Bit 1 Canadian V-CHIP 1£º yes 0£º no Bit 2 UNRATED£¬1£º yes 0£º no MDOE8 Bit 3 NO RATING£¬1£º yes 0£º no Time setting for curtain when turn on the set ~Bit 7 ~Bit 2 Bit 3...
  • Page 25 Bit 4 Bit 5 Bit 6 Bit 7 SLO f0 shift(test only) Menu 14(Remote key: “sleep) Item Remark HAFC Bit 1 ~ 0 AFC gain (TV mode) [1CH, bit 5 ~ 4] Bit 3 ~ 2 AFC gain (AV mode) [1CH, bit 5 ~ 4] AGCC NOIS ONTM...
  • Page 26 Item Remark M-COL Mild color M-BRI Mild brightess M-CON Mild contrast M-SHP Mild sharpness Menu 20: no shortcut key Item Remark SEG_POINT1 Highest frequency of VHFL SEG_POINT2 Highest frequency of VHFH DATA_VL VHFL bandswitch£¨ BB£© DATA_VH VHFH bandswitch£¨ BB£© DATA_UF UHF bandswitch£¨...
  • Page 27 +112V PROM 24C08 TUNER Video MCU+VCD SAWF TMPA8823 amplifie CVBS/Y Horizontal output 4052 (VIDEO) Vertical output (VIDEO) STV9302 MSP3425 TDA7057AQ (L,R) (L,R)
  • Page 31 Colour Television Chassis: M123A Fuse Blown Figure 1 Fuse Blown Is the drain of D815~D818 Replace Q801 shorted D815~D818 to earth? Check IC801 and Cheek peripheral Replace components. Q801 Figure2 No Raster Abnormal +B raster abnormal + B Check IC802 and their Check Q830 resistance to earth peripheral components...
  • Page 32 Colour Television Chassis: M123A Figure3 No Raster, +B OK No raster Replace IC201 Replace Q401 B Voltage OK Yes Check the waveform H-out Is the voltage Check Q402 waveform at PIN static working of in 25 of and LOT 13 of IC201 OK? point of Q401.
  • Page 33 Colour Television Chassis: M123A Figure 5 Sparse noise dots Symptom: raster ok, no picture, no sound, sparse noise dots Apply the pointer of multimeter at R X 1 K¦ ¸ , connect one probe to GND, use another to touch P42 of Is the voltage at Check and repair IC101.
  • Page 34 Colour Television Chassis: M123A Figure 6 No Sound No sound Is the speaker Replace the speaker Replac e IC601 Apply the pointer of multimeter at RX1K ¦ ¸ connect one probe to Is it mute at Check power GND, use another to touch P3, P5 of supply IC601, Is there interference noise IC601?
  • Page 35 Colour Television Chassis: M123A Figure 8 No Picture Check Check R516 ~ Check +9V, TV&AV Q501~Q503 R521 etc. +200V haven’t Picture Check P25, P49 of IC201 Replace IC201 Check RGB signal and the relative circuit TV has Picture. AV hasn’t Picture. Check Pin61 of IC201 Check the waveform of Check the logic of...
  • Page 36 Colour Television Chassis: M123A Figure 9 Tuning Control doesn’t work Check the power Symptom: supply of IC201. Check Tuning Control Are there H & V R408,R406,D404,C422 doesn’t work flyback pulses at P12 of IC201 Press STANBY key on R/C. Can Check/Replace ¢...
  • Page 37 Colour Television Chassis: M123A Is there any change on Check the remote control ¢ Ù the voltage level at receiver and transmitter. P64 of IC201? Is the VDD(+5V) at Check Q002 and P9 and P55 of IC201 peripheral circuit Is there the 8MHz/5Vp-p Are C021, C022 sine wave oscillations at P6 and X001 ok?