TOSHIBA SERVICE MANUAL COLOUR TELEVISION 21N21E2 PRINTED IN UK.
SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. 2. AVOID AN ELECTRIC SHOCK There is a high voltage part inside. Avoid an electric shock while the electric current is flowing. 3.
CONTENTS SERVICING NOTICES ON CHECKING ...................................................................................................... HOW TO ORDER PARTS ........................................................................................................................... IMPORTANT ................................................................................................................................................ CONTENTS ..............................................................
GENERAL SPECIFICATIONS G-1 TV System CRT CRT Size / Visual Size CRT Type Deflection Magnetic Field BV/BH 21 inch / 544.5mmV NORMAL 90 degree +0.45G/0.18G PAL/SECAM 1 Speaker Front 1.5 x2.7 Inch 8 ohm 5.0 W 4.0 W No Yes Yes CCIR System B/G D/K I 1Tuner Hyper F-Synth VHF/UHF 75 ohm E2 - E4, X - Z+2, S1 - S10, E5 - E12, S11 - S41, E21 - E69 B/G, D/K, I 38.9 , 38.9, 38.9 MHz 33.4 , 32.4, 32.9 MHz 5.5 , 6.5, 6.
GENERAL SPECIFICATIONS G-7 On Screen Display Menu Menu Type Picture Contrast Brightness Colour Tint (NTSC Only) Sharpness Yes Character Yes Yes Yes Yes Yes Yes Audio No No No No No No Bass Treble Balance BBE On/Off Stable Sound On/Off CH Tuning Manual Auto CH MAPPING CH Allocation Text Langage(East/West) Language Clock Set On/OffTimer Set On Timer Set Pin Code Registration Panel Lock Nicam Auto Off AV Colour System Sound System Auto 4:3 Default AV2 Output Output Source Source Control Level Volume Brig
GENERAL SPECIFICATIONS G-10 Remote Control Unit Glow in Dark Remocon Format Custom Code Power Source Total Keys Keys T'TEXT Keys RC-GX Voltage(D.
GENERAL SPECIFICATIONS G-11 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft(Back Up 30 Min.
GENERAL SPECIFICATIONS G-13 Interface Switch Indicator Terminals G-14 G-15 Set Size Weight G-16 Carton Front Power (Tact Sw) System Select Main Power SW Sub Power Channel Up Channel Down Volume Up Volume Down Rear AC/DC TV/CATV Selector Degauss Main Power SW Power Stand-by Stand-by/ON On Timer Front Video Input Audio Input Other Terminal Rear Video Input(Rear1) Video Input(Rear2) Audio Input(Rear1) Audio Input(Rear2) Video Output Audio Output Euro Scart(21Pin) S-INPUT Euro Scart(21Pin) RGB-INPUT C
DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to remove the other. 1. REMOVAL OF ANODE CAP Read the following NOTED items before starting work. NOTE * After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage. * Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged.
DISASSEMBLY INSTRUCTIONS 3. When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 2-3.) 2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC REMOVAL NOTE 1. Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage. (Refer to Fig. 2-1.
DISASSEMBLY INSTRUCTIONS INSTALLATION 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 2-8.) 1. Take care of the polarity of new IC and then install the new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily. (Refer to Fig. 2-5.) Thin-tip Soldering Iron IC Soldering Iron Fig. 2-8 5.
SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 2 seconds. Set Key Remocon Key Operations 0 Reset the user setting items (PICTURE, VOLUME and LANGUAGE) to the initial state for delivery. 1 Initialization of the factory. NOTE: Do not use this for the normal servicing.
ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE 2. BASIC ADJUSTMENTS Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. 2-1: CONSTANT VOLTAGE 1. 2. 3. 4. CAUTION • Use an isolation transformer when performing any service on this chassis. • Before removing the anode cap, discharge electricity because it contains high voltage.
ELECTRICAL ADJUSTMENTS 2-7: WHITE BALANCE 2-10: VERTICAL POSITION/VERTICAL LINEARITY NOTE: Adjust after performing CUT OFF adjustment. 1. Receive the monoscope pattern from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Adjust the VR401 until the horizontal line becomes fit to the notch of the shadow mask. 4. Adjust the VR420 until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum. 1.
ELECTRICAL ADJUSTMENTS 2-13: TINT 2-15: Confirmation of Fixed Value (Step No.) 1. Receive the NTSC color bar pattern. (Audio Video Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Connect the oscilloscope to TP024. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (20) on the remote control to select "TINT". 5. Press the VOL. +/- button on the remote control until the section "A" becomes a straight line. (Refer to Fig.
ELECTRICAL ADJUSTMENTS 3. PURITY AND CONVERGENCE ADJUSTMENTS 3-3: STATIC CONVERGENCE NOTE Adjust after performing adjustments in section 3-2. 1. Turn the unit on and let it warm up for at least 30 minutes before performing the following adjustments. 2. Place the CRT surface facing east or west to reduce the terrestrial magnetism. 3. Turn ON the unit and demagnetize with a Degauss Coil. 1. Receive the crosshatch pattern from the color bar generator. 2.
ELECTRICAL ADJUSTMENTS 4.
BLOCK DIAGRAM CH UP ON TIMER D103 9 STANDBY LED 31 AVDD2 25 AVDD3 1 REMORT 1 IF 7 1 11 MEMORY IC CHROMA IC IC199 IC201 STV2248E S-24C16AFJA-TB-01 8 6 7 VOL UP 49 ON_TIMER AVDD1 AT+5V OS101 SCL SDA STAND BY/P.ON D101 39 AGC PIFIN2 Q103 LED DRIVE BPL PIFIN1 LED DRIVE TU001 CH DOWN RF_AGC_OUT Q102 MICON W/T.TEXT IC IC101 OECF013B KEY_IN 56 4 VOL DOWN SDA 19 5 SDA SCL 20 6 SCL I2C P.
PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CP101 R421_1 D407 C407 R429_1 C448 C422 R426 R425 VR401_1 R416 W030 D401 D402 W104 L403 D406 CP401 W036 W035 L401 W111 C503_1 R410 C404 R424 C446 D404 R544 C 44 2_ 1 C414_1 W107 W095 C5 32 C5 35 _1 50 1 Q5 01 W139 B501 R552 C537_2 R5 09 D503 L501 R517 D525 Q507 VR501 CP801_ 1 C501_1 TH501 F501 R813 D805 Q505 SW501 W812 C811 CD803B C525 W810 D804 W808 W807 C131 D506 R819 W130 CP501 RY
PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) R704 Q103 R102 R101 R103 R738 C736 R104 C759 R126 Q703 R727 R728 R137 Q102 R726 R132 C753 SOLDER SIDE R107 R603 R125 C129 C120_2 R133 C143 R148 IC102 C543 R115 R105 R106 R129 R128 IC199 C139_1 R114 C119 C509 Q1002 R141 R142 R140 R540 R143 Q503 R1005 R1010 R1011 C1012 R502 R618 C614_2 C207_1 R218 C633 C205 R638 C202 C213_2 C218 C612 C206_2 C210_2 R219 R217 Q204 C212 R201 R214 C603_2 R607 C201 C215 R204 W860
A B C D E F G H MICON/TUNER SCHEMATIC DIAGRAM STEREO RESET OSC_IN DEGAUSS 2.2 2.3 NC(BBE-H) 0 ATS STANDBY LED 47 SECAM_VL_H POWER 45 PXFM OSD_FB 2 13 R006 50V 1 KA C003_1 R005 270 1/4W 82K 15K 1.8 4.9 R004 270 1/4W YK 6.3V 470 C002 R003 0.01 B C007 NC 4.9 NC 5.0 12 2 1 AGC 3 ADRES NC 4 SCL NC 5 SDA 6 V.S 10 NC 31.4 MTZJ33B 10uH 0305 L001 0 5 1 4.9 10K W832 R105 10K R106 F 0.47 C139_1 1 B C120_2 0 6 1.8K 100P CH C128 R146 1K 1/4W R142 1.
A B C D E F G H IF/CHROMA SCHEMATIC DIAGRAM (MAIN PCB) 8 8 0.022 B CF201 TPTRD5M50B01-A0 1K R219 330K 1 B 1 F 1 B 21_B 21_G R622 17 0.1 B FROM POWER 0 28 R_EXT/V_EXT G_EXT/Y_EXT B_EXT/U_EXT APR CHR Y/CVBS_IN3 BS CVBSIN2 21_Y P.CON+5V BLK_EXT 0.1 B C623 0.1 B C622 C608 1 15 NC 0 3.2 2.7 3.2 1.7 1.9 2.5 2.5 2.
A B C D E F G H 21PIN/AV SW SCHEMATIC DIAGRAM (MAIN PCB) 8 8 L713 15uH 7 7 C742 16V 10 KA L717 FRONT_A_IN_L 10V 100 YK VCC IN2 5 FRONT_V_IN3 4 6 4.8 16V 10 16V 10 KA W824 75 L711 31 C741 1/4W R720 C715 KA 0 B SW OUT 6 4.8 C725 3 C724 2 0.
A B C D E F G H SOUND AMP SCHEMATIC DIAGRAM (MAIN PCB) 8 8 7 7 TO 21PIN/AV SW FRONT_A_IN_L FRONT_V_IN3 AN5276 2 3 3.8 R738 L715 1 B 560 10uH 5 E C736 2 2.8 1 R727 7.5 R728 R726 C1014 35V 470 YK C1009 25V 1000 C1013 35V 100 YK 2.2K 10K R1005 0.0068 B R1011 BUFFER Q703 2SC2412K 5.0 SOUND_GND R725 390 1/2W P.FAIL W4BRH3.5X6X1.0 W4BRH3.5X6X1.0 4 C753 W829 GND 6 B701 B702 3 390 1/2W P.CON+8V 7 2 R706 470P CH SOUND+B MUTE Q1002 DTA124EKA 470P CH C754 0 4.
D E DEFLECTION/CRT SCHEMATIC DIAGRAM F CP802B B2013H02-6P 8 1 1 GND CUT OFF 2 2 CUT OFF B.OUT 3 3 B.OUT R.OUT R.OUT 4 4 R.OUT G.OUT G.OUT 5 5 G.OUT PROTECT 6 6 PROTECT 1 1 CP803B B2013H02-4P 180V R411 C404 5 7 1 1W 4.7K 1SS133 R811 D806 40 1/4W R804 W852 C810 270 W810 39 41 2.7K 1/4W 1 R424 R G B R805 2 BLUE AMP Q806 KTC4217 5 12K 2W NC 9 10 8 6 11 R807 20416A 3 6 120.0 2.9 GREEN AMP Q805 KTC4217 W875 R425 560 1/2W 4 L403 2.5 120.0 2.
A B C D E F G H POWER SCHEMATIC DIAGRAM (MAIN PCB) 8 3A 125V ICP502 35V 1000 MHE D526 1W W803 IN OUT GND SW 16V 1000 YK R530 1/4W MTZJ5.1B C518_1 4.9 P.CON+5V FROM/TO MICON/TUNER 4.9 P.FAIL 6V REG. IC KIA278R06PI 10K 4 TUNER_BT GND C530 R542 0 EMERGENCY Q508 DTC114TKA 0 EMERGENCY Q512 DTA114EKA 3 5.3 0 0 P.CON SW Q510 DTC124EKA 16V 10 KA 6.3V 0 2.2K R508 HS503 763WAA0187 R537 10K 220 YK 11E1-EIC C533 R538 560 1SS133 D519 1SS133 D514 P.
WAVEFORMS MICON/TUNER 0.5µs 1V IF/CHROMA 50µs 100mV 1 6 10ms 50µs 1V 100mV 20µs 0.5V 11 2ms 200mV 2 7 12 20µs 1V 50µs 20µs 0.5V 1V 3 8 20µs 0.2ms 1V 1V 4 50µs 100mV 5 13 20µs 1V 9 14 0.2ms 1V 20µs 1V 10 15 NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
WAVEFORMS 20µs 100mV 20µs 1V 20µs 1V 16 21 27 20µs 1V 20µs 17 22 20µs 10ms 100mV 1V 18 23 2ms 1V 200mV 30 2ms 200mV 31 DEFLECTION/CRT 20µs 1V 20µs 200mV 19 24 10ms 1V 33 21PIN/AV SW 20µs 1V 20µs 1V 10ms 10V 20 26 34 NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
WAVEFORMS 10ms 10V 20µs 50V 35 40 20µs 10V 20µs 50V 36 41 SOUND AMP 20µs 5V 2ms 0.5V 37 43 2µs 200V 0.2ms 5V 38 45 20µs 50V 39 NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
MECHANICAL EXPLODED VIEW 106 202 202 111 202 202 202 203 202 201 102 202 201 109 PCB110 (CRT PCB ASS'Y) 201 110 112 203 114 115 201 114 204 105 104 115 206 107 206 206 206 203 204 113 103 205 108 PCB010 (MAIN PCB ASS'Y) 101C 101D 101E 101B 203 101A 101 I-1
MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Part No.
TOSHIBA Information Systems (UK) Ltd Consumer Products Division, European Service Centre, Admiralty Way, Camberley, Surrey.
