FILE NO. 020-200012 SERVICE MANUAL COLOR TELEVISION N0NSP Chassis 50A60, 50A50 55A60, 61A60 (TAC0050) (TAC0051) (TAC0052) (TAC0053) TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN PUBLISHED IN JAPAN, May.
GENERAL ADJUSTMENTS TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ........................................................................................................................................ 3 CRT ASSEMBLY REPLACEMENT AND MOUNTING ............................................................................................. 4 PICTURE TUBE COMPONENTS ADJUSTMENT ....................................................................................................
CHAPTER 1 GENERAL ADJUSTMENTS X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not be above the specified limit. The nominal value of the high voltage of this receiver is (A) kV at zero beam current (minimum brightness) under a 120V AC power source. The high voltage must not, under any circumstances, exceed (B) kV. Refer to table-1 for high voltage (A), (B). (See SETTING & ADJUSTING DATA on page 17) 2.
GENERAL ADJUSTMENTS CRT ASSEMBLY REPLACEMENT AND MOUNTING CAUTION : DO NOT LOOSEN THE HEX HEAD BOLTS WITH SPRINGS (12 PCS), BECAUSE THOSE ARE FOR SEALING OF CRT COOLANT. R G B Attention Serviceman The Hex Head Bolts with Springs. (see sketch) used on CRT assembly, are “NOT” Adjustment Screws DO NOT LOOSEN-FLUID LEAKAGE WILL OCCUR. SPECIFIC INFORMATIONS 8 o’clock 4 o’clock 4 Screws 4 Screws Lens Assembly CRT Assembly CRT Anode Cap Assembly S.V.M.
Anode Cap CRT REPLACEMENT (Same procedure for R, G, B) Reverse the removal procedures except the followings. 1. Anode Cable should be replaced with new one. See “SERVICING PRECAUTIONS” shown below. 2. Install silicon (T461B) to the CRT, replace the Anode cable and put enough silicon again on around the Anode Cap as illustrated. CAUTION: Align the Anode cable as illustrated on page 4. ADJUSTING PROCEDURE IN REPLACING CRT 1. R.G.B. FOCUS ADJUSTMENT (page 6.) 2. PICTURE TILT ADJUSTMENT (page 6.) 3.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS WARNING : BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. PICTURE TUBE COMPONENTS ADJUSTMENT DESCRIPTION OF NECK COMPONENTS 2 TILT ADJUSTMENT Rotate R, G, B deflection yoke so that picture becomes horizon, then fasten screw. 1 CENTERING ADJUSTMENT 1. Stretch a thread between two center slots of screen edge (top and bottom, left and right).
GENERAL ADJUSTMENTS LOCATION OF SCREEN AND FOCUS VR’S FOCUS VR R –7– G B SPECIFIC INFORMATIONS SCREEN VR
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS REPLACEMENT OF THE CRT Service parts are provided for each R, G and B. The contents of the parts are as follows. HITACHI CRT R G B 50A50 23796001 23005397 23796003 50A60 23005114 23005115 ↑ 55A60 23005242 ↑ ↑ 61A60 23005249 ↑ 23796486 REPLACEMENT OF HIGH VOLTAGE CABLE 1. When replacing Anode Lead or Anode Cap with new one, remove Lead Holder from old lead as shown in figure below, and put it on new lead. Do not throw away Lead Holder.
1. ENTERING TO SERVICE MODE 1) Press MUTE button once on Remote Control. 2) Press MUTE button again to keep pressing. 3) While pressing the MUTE button, press MENU button on TV set. S MUTE (Service mode display) 2. DISPLAYING THE ADJUSTMENT MENU 1) Press MENU button on TV. Adjustment mode Item S Press Data Press 3. KEY FUNCTION IN THE SERVICE MODE The following key entry during display of adjustment menu provides special functions.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS 4. SELECTING THE ADJUSTING ITEMS 1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2. (t button for reverse order) Refer to table-2 for preset data of adjustment mode. (See SETTING & ADJUSTING DATA on page 17) 5. ADJUSTING THE DATA 1) Pressing of VOLUME s or t button will cahnge the value of data in the range from 00H to FFH. The variable range depends on the adjusting item. 6.
VERTICAL POSITION (VCEN) ADJUSTMENT PROCEDURE 1. Call up the adjustment mode display, then select item VCEN. 2. Press the VOLUME s or t button to get the voltage +30 ±10 mV. 3. Measuring method of voltage as follows. TP-V (on SIGNAL board) TP-G C DIGITAL VOLT METER (on SIGNAL board) SUB-BRIGHTNESS (BRTC) SUB-COLOR (SCOL) SUB-TINT (TNTC) 1. Constrict the picture height until the vertical retrace line appears adjusting the HEIGHT control on the MAIN board. 2.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS ITEM ADJUSTMENT PROCEDURE HEIGHT (HIT) 1. Call up the adjustment mode display, then select the item HIT. 2. Press the VOLUME s or t button to get the picture so the top of raster begins to lack. 3. Press the VOLUME s button to advance the data by 10 steps. Note : Check the vertical picture position is correct. WIDTH (WID) 1. Call up the adjustment mode display, then select the item WID. 2.
1. Select the adjustment mode following the steps on page 9. RCUT 40H KEY FUNCTION IN THE CONVERGENCE ADJUSTMENT: Up : Selet Green color: Left : Blinking of cursor ON/OFF: Right: Adjust mode ON/OFF: Down: Erase Green line: Erase Red line: Erase Blue line: 2 button 3 button 4 button 2. Press “7” button to display the built-in cross-hatch pattern. 5 button 6 button 27.5 7 button 8 button 0 button 100 button Cursor CHRTN (ENT) button P = 50.5 x14 (50") 55.8 x14 (55") 62 x14 (61") 27.
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS NOTES In many cases, color misconvergence may be corrected by returning HIT and WID data in main deflection side to initial adjusting values. Following cases will surely require readjustment of convergence. CRT REPLACEMENT When CRT is replaced, main deflection readjustment and color matching are required. Perform following procedures. 1. Replace two CRT’s of blue and red. 2. Perform horizontal adjustment for blue and red yokes on base of green CRT data.
GENERAL ADJUSTMENTS SCREEN AND MIRROR ALIGNMENTS MOUNTING OF FRONT SCREEN ASSEMBLING OF FRONT SCREEN 5 screws Fresnel sheet Protect shield FRONT 3 screws (for 50”) Lenticular sheet 3 screws Protect shield FRONT Fresnel sheet Stick cotton cloth tape Label with part number Label with part number (for 55”, 61”) Lenticular sheet Protect shield FRONT Label with part number Stick contton cloth tape Fresnel sheet Label with part number 4 screws * Please refer to Mechanical Disassembly on page 23.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS CIRCUIT CHECKS HIGH VOLTAGE CHECK CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps below. 1. Connect an accurate high voltage meter to the anode of the picture tube. 2. Turn on the receiver. Set the BRIGHTNESS and CONTRAST to minimum (zero beam current). 3. High voltage must be measured below (B) kV. Refer to table-1 for high voltage (B). (See SETTING & ADJUSTING DATA on page 17) 4.
CHAPTER 2 SPECIFIC INFORMATIONS SAFETY INSTRUCTIONS HIGH VOLTAGE AT ZERO BEAM: MAX HIGH VOLTAGE: (A) (B) 43", 50", 55", 61" 31.3 kV 32.4 kV Table-1 SERVICE MODE ADJUSTING ITEMS AND DATA IN THE SERVICE MODE: Item RCUT GCUT BCUT GDRV BDRV CNTX BRTC COLC TNTC SCOL SCNT HPOS VPOS HIT LIN VSC WID VPS Name of adjustment R CUTOFF G CUTOFF B CUTOFF G DRIVE B DRIVE SUB CONT MAX SUB-BRIGHT SUB-COLOR SUB-TINT SUB COLOR SUB-CONTRAST HORIZ. POSITION VERT.
TV front SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS LOCATION OF CONTROLS (Representative : 50A60) Behind the door CH MENU AUDIO S-VIDEO VOL VOL EXIT TV/VIDEO DEMO POWER VIDEO L/MONO R CH Video Audio inputs POWER VOLUMET S MENU CHANNEL st TV rear ANT (75Ω) AUDIO CENTER CHANNEL IN ANT-1 OUT ON OFF OUT L R S-VIDEO Y VIDEO CB L/ MONO VAR AUDIO VIDEO L AUDIO L/ MONO AUDIO R VIDEO-1 VIDEO-2 IN R C COLOR R STREAM AUDIO INPUT DVD IN R OUT – 18 – EXIT ANT-2 DEMO TV/VIDEO
RECALL LIGHT RECALL POWER TV/CABLE/VCR switch Set to “TV” to control the TV. TV CABLE VCR MUTE TV/VIDEO TIMER MUTE 2 3 CH Channel Number 4 5 7 8 100 0 CHANNEL s/t 6 9 CH RTN VOL VOLUME s/t ENT CH RTN C. CAPT PT ADV/ PIP CH MENU ME CA NU C.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS PROGRAMMING CHANNEL MEMORY The channel memory is the list of TV channel numbers the TV tunes in when you press the CHANNEL s or t button. First, use the TV/CABLE and CH PROGRAM functions to preset all active channels in your area automatically. If necessary, arrange the preset channels with the ADD/ERASE functions so that you can tune into only desired channels.
CIRCUIT BLOCK DIAGRAM – 21 – – 22 –
MECHANICAL DISASSEMBLY 1 Speaker Grille Removal 2 Control Panel Removal 3 Front Mask Removal 4 Mask Removal A101 A201 A267 A221 (A322) A201 A213 A224 A266 A202 K502 A103 A126 A127 A268 A266 A265 K501 (K511) 4 screws A102 5 Shield Plate, Lens Removal 6 Mirror Removal 5 screws 7 Back Board Removal 8 Light Box Removal A152 4 screws K111 K112 K113 3 screws (A110) A401 K601 1 screw 5 screws (A150) 3 screws A160 A424 A269 3 screws 3 screws 4 screws – 23 – – 24 –
CHASSIS REPLACEMENT PARTS LIST NOTICE: • The part number must be used when ordering parts, in order to assist in processing, be sure to include the Model number and Description. • The PC board assembly with * mark is no longer available after the end of the production. Models : 50A60/50A50/55A60/61A60 Capacitors ............. CD : Ceramic Disk PF : Plastic Film EL : Electrolytic Resistors ...............
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS Location No. Part No. Description Location No. Part No.
Description C739 C740 C741 C742 C743 C744 C745 C746 C747 C748 C749 C750 C761 C762 C763 C765 C766 C767 C769 C770 C771 C772 C773 C774 C775 C777 C778 C779 C781 C782 C783 C784 C785 C786 C787 C788 C789 C790 C795 C798 C799 C801 C809 C810 C814 C815 C816 C817 C819 C830 C831 C832 C833 C840 C842 C843 C857 C858 C860 C863 C864 C866 C867 C868 24092293 24092293 24794470 24794470 24092293 24092293 24794470 24794470 24092293 24092293 24794470 24794470 24774102 24590562 24774391 24774102 24590562 24774391 24774102 2459056
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS Location No. Part No.
Description CV64 CV65 CV66 CV67 CV68 CW04 CW05 CW07 CW08 CW09 CW12 CW13 CW14 CW15 CW16 CW17 CW18 CW19 CW20 CW21 CW22 CW26 CW52 CW53 CW54 CW58 CW59 CY01 CY40 CZ03 24206100 24591122 24436561 24591102 24206010 24591822 24212103 24666470 24794101 24815103 24666470 24709100 24436101 24214472 24436101 24214472 24666470 24435560 24709100 24666470 24436561 24212102 24203100 24203100 24203100 24794101 24232103 24665471 24206100 24092442 CZ05 CZ07 CZ09 CZ10 CZ11 CZ12 CZ13 CZ14 CZ17 CZ19 CZ20 CZ21 CZ22 CZ23 CZ24 CZ
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS Location No. Part No.
Description Location No. Part No.
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS Location No. Part No. Description Location No. Part No.
Description Location No. Part No.
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS Location No. Part No. Description Location No. Part No.
Description RZ03 RZ04 RZ05 RZ06 RZ08 RZ09 RZ10 RZ12 RZ13 RZ14 RZ15 RZ17 RZ18 RZ19 RZ20 RZ22 RZ29 RZ30 24872332 24872122 24872471 24872821 24872122 24872101 24872471 24872332 24872122 24872821 24872821 24872471 24872122 24872332 24872101 24872471 24872331 24872331 Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, Chip, 3300 ohm, 1/16W 1200 ohm, 1/16W 470 ohm, 1/16W 820 ohm, 1/16W 1200 ohm, 1/16W 100 ohm, 1/16W 470 ohm, 1/16W 3300 ohm, 1/16W 1200 ohm, 1/
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS Location No. Part No.
Description Q972 Q973 Q974 Q975 Q976 Q981 Q982 Q983 Q984 QA01 QA02 QA71 QB01 QB03 QB14 QB30 QB61 QB81 QB82 QB83 QB84 QB85 QB86 QB87 QB88 QB92 QD01 QR02 QR14 QR15 QR16 QR17 QS01 QS11 QS12 QS13 QS14 QV01 QV20 QV21 QV22 QV23 QV40 QV41 QV42 QV43 QV48 QW01 QW05 QW06 QW07 QW09 QW10 QW11 QW11 QW12 QW17 QW19 QW20 QW52 QW53 QW54 QW60 QW68 A6317440 A6317440 A6317440 A6317440 A6317440 A6534040 A6534040 A6317440 A6534040 23000374 23905666 A6541130 23114528 A6004050 A6541130 23314965 A6361770 A6359870 A6359870 A654113
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS Location No. D661 D701 D702 D703 D704 D705 D706 D707 D801 D819 D820 D821 D840 D845 D851 D862 * D863 D864 D873 D875 D876 D877 D878 D881 D884 D885 D891 D892 D899 D901 D902 D911 D912 D921 D922 D924 D925 D961 D965 D966 D975 D7703 D7705 D7706 D7707 D7708 D7709 D7710 D7711 D7712 D7713 D7717 D7718 D7719 DA02 DA11 DA34 DA43 DA44 DA45 DA46 DB01 DB13 DB30 Part No.
Description KB11 23904946 P002 P701 P702 P708 P709 P713 P714 P715 P801 PV02 PV06 PZ01 PZ02 S602 SA01 SA02 SA03 SA04 SA05 SA06 SA07 SA08 SA09 SR81 UY01 23365089 23367724 23367724 23902655 23902655 23164787 23164787 23164787 23372117 23365819 23903040 23368130 23902213 23145412 23145226 23145226 23145226 23145226 23145226 23145226 23145226 23145226 23145226 23146556 23148731 V901A V902A V903A W661 23902019 23902019 23902019 23151232 W662 23151232 X401 23153721 X501 XA01 23153961 23153533 Z401 Z40
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS Location No. Part No.
SIGNAL/CON BOARD PB9450 BOTTOM (FOIL) SIDE – 41 – – 42 –
DEF/POWER BOARD PB9451 BOTTOM (FOIL) SIDE – 43 – – 44 –
BACK/AV BOARD PB9452 SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS BOTTOM (FOIL) SIDE – 45 –
DIGI-CONV BOARD PB9453 SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS BOTTOM (FOIL) SIDE DIGI-COMB BOARD PB9398 BOTTOM (FOIL) SIDE – 46 –
R-DRIVE BOARD PB9454-1 SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS BOTTOM (FOIL) SIDE B-DRIVE BOARD PB9454-3 BOTTOM (FOIL) SIDE – 47 –
FRONT-CONT BOARD PB9454-4 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS B-DRIVE BOARD PB9454-2 – 48 –
FRONT-CONV BOARD PB9454-5 FRONT-IN BOARD PB9454-9 BOTTOM (FOIL) SIDE REM BOARD PB9454-10 BOTTOM (FOIL) SIDE – 49 – SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS BOTTOM (FOIL) SIDE
FRONT-CON BOARD PB9454-8 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS SVM BOARD PB9454-6 – 50 –
2SD2253 (old) 2SC5243 E C 2 B 2SC3852 2SD1763A 2SC1569 2SC4544 2SA1788 2SA1306 2SA1186A 3 2SC752GTM 2SC2482 2SC2655 2SC4721P C B BC RN2203 RN2201 RN2004 RN1203 RN1204 RN2204 RN1205 RN1202 RN1201 7 2SD1554 2SD2253 2SD1556 2SD2553 2SC5143 8 E C BC ON4409 E E E 2SC752 2SA562TM 2SA1015 2SC1815 2SC2878 2SC1740S 2SC2120 2SA9335 5 2SA1788 E E 6 4 C B CB – 51 – B CB E SPECIFIC INFORMATIONS 1 GENERAL ADJUSTMENTS TERMINAL VIEW OF TRANSISTORS
GENERAL ADJUSTMENTS MEMO ........................................................................................................................................ ........................................................................................................................................ ........................................................................................................................................ ..........................................................................
GENERAL ADJUSTMENTS TELEVISION SYSTEM NTSC standard CHANNEL COVERAGE VHF: 2 through 13 UHF: 14 through 69 Cable TV: Mid band (A-8 through A-1, A through I) Super band (J through W) Hyper band (AA through ZZ, AAA, BBB) Ultra band (65 through 94, 100 through 125) POWER SOURCE 120 V AC, 60 Hz POWER CONSUMPTION 137W AUDIO POWER 14 W + 14 W SPEAKER TYPE Two 6-1/4 inches (16 cm) round VIDEO/AUDIO TERMINALS S-VIDEO INPUT Y-INPUT: 1V (p-p), 75 ohm, negative sync. C-INPUT: 0.
FILE NO. 020-200012 SERVICE MANUAL COLOR TELEVISION N0NSP Chassis 50A60, 50A50 55A60, 61A60 (TAC0050) (TAC0051) (TAC0052) (TAC0053) TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN PUBLISHED IN JAPAN, May.