TOSHIBA SERVICE MANUAL COLOUR TELEVISION 14N21NS 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 14 inch / 335.4mmV Normal 90 degree +0.45G/0.18G PAL 1 Speaker Bottom 1.5 x3.0 Inch 8 ohm 1.0 W 0.8 W No Yes Yes CCIR System B/G 1Tuner Ohers F-Synth VHF/UHF 75 ohm E2 - E4, X - Z+2, S1 - S10, E5 - E12, S11 - S41, E21 - E69 B/G 38.9 MHz 33.4 MHz 5.5 MHz 100 No Yes 230V-240V AC 50Hz Color System Speaker Sound Output G-2 Tuning System DDR SECAM NTSC3.58(AV)+NTSC4.
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 Matual Auto CH Allocation 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 Brightness Contrast Colour Tint (NTSC O
GENERAL SPECIFICATIONS G-10 Remote Control Unit Glow in Dark Remocon Format Custom Code Power Source Total Keys Keys T'TEXT Keys G-11 Features RK-EY Voltage(D.
GENERAL SPECIFICATIONS G-12 Accessories Owner's Manual Language w/Guarantee Card Remote Control Unit Rod Antenna Poles Terminal Loop Antenna Terminal U/V Mixer DC Car Cord (Center+) Guarantee Card Warning Sheet Circuit Diagram Antenna Change Plug Service Facility List Important Safeguard Dew/AHC Caution Sheet AC Plug Adapter Quick Set-up Sheet Battery UM size x pcs OEM Brand G-13 G-14 G-15 Interface Set Size Weight AC Cord AV Cord (2Pin-1Pin) Registration Card PTB Sheet 300 ohm to 75 ohm Antenna Ad
GENERAL SPECIFICATIONS G-16 Carton Master Carton Content Material Dimensions W x D x H(mm) Description of Origin Gift Box Material Dimensions W x D x H(mm) Design Description of Origin Drop Test Height (cm) Container Stuffing A3-5 No Sets -/--- x -- x -Yes Yes Double/Brown 440 x 408 x 380 As per Buyer's Yes Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces 62 866 Sets/40' container ----
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 VOL. (-) MIN 0 Reset the user setting items (PICTURE, VOLUME and LANGUAGE) to the initial state for delivery. VOL. (-) MIN 1 Initialization of the factory. NOTE: Do not use this for the normal servicing.
WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. Note: No need setting for the position of the mark @ due to the adjustment value.
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 2-6: FOCUS 2-10: BRIGHT CENT 1. Receive an 70dB monoscope pattern. 2. Turn the Focus Volume fully counterclockwise once. 3. Adjust the Focus Volume until picture is distinct. 1. Receive the PAL black pattern*. (RF Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Place the set with Aging Test for more than 15 minutes. 4. Activate the adjustment mode display of Fig.
ELECTRICAL ADJUSTMENTS 2-13: TINT 1. Receive the PAL color bar pattern. (Audio Video Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Connect the oscilloscope to TP023. 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. 2-2) "A" Fig. 2-2 2-14: Confirmation of Fixed Value (Step No.
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 VOL UP SCL SDA Q102 40 ON_TIMER LED SW D105 ON TIMER CH UP Q103 KEY_IN 56 4 CH DOWN LED SW 37 AVDD1 STAND BY 27 AVDD2 21 AT+5V OS101 5 SDA 6 SCL OSD-B 9 AVDD3 50 OSC_OUT 7 1 11 8 6 7 5 34 OSD-B 35 OSD-G OSD-R 11 36 OSD-R CVBS2 29 29 CVBSOUT1 AV1 IF CHROMA IC201 STV2246C CVBS1 30 X101 4MHz AGC I2C P.CON+5V MEMORY IC199 S-24C04BDP-LA OSD-G 10 57 REMORT 1 SDA 13 SCL 14 BPL PIFIN2 TU001 VOL DOWN PIFIN1 MAIN W/T.
PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE J1001 L501_1 C501 TP402 C5 D501 C529 OS101 02 9 B501 W052 IC501 W836 Q401 D405 R522 SW501 D524 R535 TH501 C542 43 D508 D507 R512 D521 24 J702 C1003_1 R712 IC1001 R1005 W006 J703 W011 W010 C744 C745 R740 C740 L714 R741 R1009 CC001 IC199 R710 B1001 C711 W047 R807_1 L207 TP023 CP801_1 C631 C602 SW106 L102 W821 R4 W002 W003 W004 C131 W009 R107 W007 W012 C121 SW107 W819 W005 R125 W806
PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) R120 R106 C605 R645 R205 R006 R719 C204 R202 C203 R515 R714 R715 R713 R524 C701 R504 Q512 Q509 C110 Q510 R507 C703 IC102 R128 R109 Q506 R116 R112 C513 R513 R519 C1006 R641 R139 R108 C108 R709 C413 R508 C109 C114 R104 R201 R412 R144 R105 C102 C103 49 C120 R110 R638 C625 C601 C609 C612 R541 Q508 C104 C614 R640 C624 R616 R614 1 R419 R644 33 R420 R406 R140 1 10 IC R135 R145 Q601 17 C111 C112 C105 R124 R1
A B C D G H 2.2 3.8 4.0 4.9 30.7 12 13 2 NC 1 AGC 3 ADRES 4 SCL 5 SDA 6 V.S 8 7 BPL NC 14 10 9 BTL 15 11 IF NC GND VCC C006 C003_1 50V 1 KA 15K R006 CH 47P 100P CH PH001 003P-2100 R005 100K 47P CH C005 270 1/4W C004 270 1/4W 470 YK R003 B R004 C120 6.3V C110 MTZJ33B D104 1 NC 10uH 0305 C002 4.8 FROM/TO SOUND AMP NC 0 L001 4.8 4.9 1SS133 0.47 B 16V 10 KA NC 3 4.9 R106 150 LED SW KRC111SRTK Q102 3.
A B C D E F G H CHROMA/SIF/VIF/21PIN SCHEMATIC DIAGRAM 8 8 (MAIN PCB) R213 220 1/2W SIF BUFFER Q204 2SC2412K 3.2 R208 7 7 C629 R621 W838 1K R203 1K C703 10uH L703 1 2 4 3 470P B 5 0.1 B C701 R719 100K 6 8 10K 1/4W NC R707 R715 1K 1/4W R713 NC 13 75 14 75 SDA SCL SLPF LBF/SSC H_OUT VERT BCL/SAF VCC1 (8V) NC GND1 X1/VAMP/CHR_OUT CLPF XTAL1 XTAL2 XTAL3 OSD_BK OSD_R OSD_G OSD_B ICATH R.OUT G.OUT B.
A B C D E F POWER SCHEMATIC DIAGRAM G H (MAIN PCB) 8 8 C509 FROM/TO SOUND AMP 500V 470P B D505 R517 SOUND+B C519 16V 1000 YK SB290S 5.6 2W P.CON+8V SOUND_GND W861 R506 EMERGENCY Q504 2SA1624 134.8 0 D506 7 135.0 0.1 R528 RELAY SW 0.7 Q505 KTC3203_Y 0.0 50V 22 MHE 10K 1/4W FROM/TO DEFLECTION/CRT R521 68K 1/4W 2KV 0.001 R RU2AM-EIC 1.
A B C D E F DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) 8 1 1 GND CUT OFF 2 2 CUT OFF G.OUT 3 3 G.OUT R.OUT R.OUT 4 4 R.OUT B.OUT B.OUT 5 5 B.OUT NC 6 6 NC HEATER 7 7 HEATER GND R422 820 1/4W NC 1.7 0 3 0 3 8 E27 GND FOCUS F 1.2K R814 1.2K R816 C806 680P B 270 R811 R815 2.7K 1/4W R806 2W FOCUS SCREEN S C819 2KV 0.001 B GND 0 11 ABL 7 0 0 D410 101.6 3 99.6 AU02A-EIC AU02A-EIC D405 0 7 0 E8 NC 5 220P B 96.4 6.
A B C D E F G H SOUND AMP SCHEMATIC DIAGRAM 8 8 (MAIN PCB) 3 J703 HTJ-032-05AW 1 H 2 E NC R712 820 1/4W E NC 3 28 1 7 8 7 6 0 NC 5 V.OUT Vcc NC 8.3 1 2 2 C704 0.001 B R710 0 8 + 2 3 1 1 0.3 C1004 0 C1005_1 68K 1/4W R1003 R1005 100K 16V 10 KA C1001 16V 470 YK C1002 2 B1001 W5RH3.5X5X1.0 3.9 C1009 3 5.1 FROM/TO CHROMA/SIF/VIF/21PIN - 50V 1 KA 4 SA08A05BWB W/WIRE 3.4 7 5 HEADPHONE_JACK J1001 MSJ-035-12A_PC 0.0047 B 3.
WAVEFORMS MICON/TUNER 0.2ms 1.00V 1 20µs 500µs 1.00V 50mV 6 11 CHROMA/SIF/VIF/21PIN 0.2ms 1.00V 2 2ms 0.50V 20µs 200mV 7 12 100ns 0.5µs 1.00V 20mV 20µs 1.00V 13 3 8 20µs 1.00V 0.5µs 1.00V 20us 0.50V 14 4 9 10ms 20us 1.00V 1.00V 20µs 1.00V 10 15 5 NOTH: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
WAVEFORMS 20µs 1.00V 20µs 10.0V 20µs 50V 16 21 26 SOUND AMP 20µs 20µs 500us 5.00V 5.00V 100mV 17 22 27 DEFLECTION/CRT 10ms 1.00V 2us 200V 18 23 10ms 10.0V 20µs 50V 19 24 10ms 10.0V 20µs 50V 20 25 10us 200mV 28 500us 500mV 29 NOTH: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
MECHANICAL EXPLODED VIEW 202 112 202 202 204 202 201 110 202 201 114 PCB110 (CRT PCB) 115 201 201 206 206 207 205 113 103 104 203 107 108 109 106 105 101 I-1 111 PCB010 (MAIN PCB) 102
MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO.
ELECTRICAL REPLACEMENT PARTS LIST REF. NO. R001 R002 R003 R004 R005 R006 R102 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R120 R121 R122 R123 R124 R125 R128 R131 R133 R134 R135 R138 R139 R140 R141 R142 R143 R144 R145 R146 R201 R202 R203 R204 R205 R208 R213 R214 R215 R217 R218 R219 R221 R402 R403 R404 R405 R406 R407 R408 R409 R410 R411 R412 R416 R417 R419 R420 R421 R422 R424 R427 R429 R445 R446 R447 PART NO.
ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO.
ELECTRICAL REPLACEMENT PARTS LIST REF. NO. C1004 C1005 C1006 C1007 C1009 PART NO.
ELECTRICAL REPLACEMENT PARTS LIST REF. NO. OS101 PH001 RY501 SP1001 TH501 TM101 TU001 ! V801 X101 X601 X602 PART NO.
