FILE NO. 020-200026 SERVICE MANUAL COLOR TELEVISION N0PSP Chassis 50HX70, 55HX70,61HX70 55H70, 61H70 (TAC0067) (TAC0066) (TAC0069) (TAC0065) (TAC0068) TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN PUBLISHED IN JAPAN, Aug.
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 18) 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. CUTOFF (SCREEN VR) ADJUSTMENT (page 6.) 2. R.G.B. FOCUS ADJUSTMENT (page 6.
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 Pole 2 magnet DESCRIPTION OF NECK COMPONENTS 2 1 1 Deflection yoke and convergence yoke The position on the neck is required most front (CRT funnel side) and the screw is fastened after rotating yoke adjusting picture tilt.
CENTERING ADJUSTMENT 1. Stretch a thread between two center of screen edge (top and bottom, left and right). 2. Select the adjustment mode. 3. Press TV/VIDEO button on the Remote Control to display the white cross-bar. Fig. a 6. Adjust FOCUS VR “R” of FOCUS PACK to find best focusing point of picture center. 7. Repeat steps 3 to 5 for Green and Blue colors. 4. Perform VCEN adjustment. (See page 12.) 5. Adjust G centering magnet so that the cross-bar pattern center comes to screen center. 6.
GENERAL ADJUSTMENTS LOCATION OF SCREEN AND FOCUS VR’S SCREEN VR SPECIFIC INFORMATIONS FOCUS VR R –8– G B
Service parts are provided for each R, G and B. The contents of the parts are as follows. R G B 50HX70 23005770 23005771 23003382 55HX70 23005777 ↑ ↑ 55H70 23005723 23005808 23005724 61HX70 23007215 23007216 23007217 61H70 23005689 23005808 23005690 HITACHI CRT 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.
GENERAL ADJUSTMENTS SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press MUTE button once on Remote Control. 2) Press MUTE button again to keep pressing. S MUTE (Service mode display) 2. DISPLAYING THE ADJUSTMENT MENU 1) Press MENU button on TV. Service mode SPECIFIC INFORMATIONS 3) While pressing the MUTE button, press MENU button on TV set. Adjustment mode Item S Press Data Press 3.
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. EXIT FROM SERVICE MODE 1) Pressing POWER button to turn off the TV once. ■ INITIALIZATION OF MEMORY DATA OF QA02 After replacing QA02, the following initialization is required. 1. Enter the service mode, then select any register item. 2. Press and hold the RECALL button on the Remote, then press the CHANNEL s button on the TV.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS ELECTRICAL ADJUSTMENT ITEM ADJUSTMENT PROCEDURE VERTICAL POSITION (VCEN) 1. Call up the adjustment mode display, then select item VCEN. 2. Press the VOLUME s or t button to get the voltage 0 ±10 mV. 3. Measuring the terminals voltage are TP-V and TP-G on SIGNAL Board. SUB-BRIGHTNESS (BRTC) 1. Constrict the picture height until the vertical retrace line appears adjusting the HEIGHT control on the MAIN board. 2.
HEIGHT (HIT) * Except 16:9 mode 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. HEIGHT (HIT) * Only 16:9 mode 1. Call up the adjustment mode display, then select the item HIT. 2. Press the VOLUME s or t button so that picture height becomes 75% of the front mask. WIDTH (WID) 1.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS CONVERGENCE ADJUSTMENT Adjust convergence from center to circumference in order. 1. Select the adjustment mode following the steps on page 10. 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.
REPLACING CONVERGENCE UNIT When replacing convergence unit, all picture screens require readjustment basically, but the following method allows process be reduced considerably. 1. Replace the memory (Q713) on defective unit with memory on new unit. Mounting the unit on the SET after the above working realizes picture screen before replacement immediately. 2. Mount unit which has combination of old and new memories, on SET and turn it on.
SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS SCREEN AND MIRROR ALIGNMENTS MOUNTING OF FRONT SCREEN ASSEMBLING OF FRONT SCREEN Fresnel sheet 5 screws Lenticular shield 3 screws FRONT Protect shield (for 50”) Lenticular sheet 3 screws Protect shield 3 screws FRONT Fresnel sheet Stick cotton cloth tape Label with part number Label with part number (for 55”, 61”) Lenticular sheet Protect shield FRONT Stick contton cloth tape Fresnel sheet 4 screws Label with part number Label with part number * Pl
Refer to table-1 for high voltage (B). (See SETTING & ADJUSTING DATA on page 18) 4. Vary the BRIGHTNESS to both extremes to be sure the high voltage does not exceed the limit under any conditions. CAUTION: When the following parts fail, check the High Voltage after replacing. Location No.
GENERAL ADJUSTMENTS CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS HIGH VOLTAGE AT ZERO BEAM: MAX HIGH VOLTAGE: 40~61" 31.5 kV 32.6 kV Table-1 SERVICE MODE ADJUSTING ITEMS AND DATA IN THE SERVICE MODE: Item SPECIFIC INFORMATIONS (A) (B) RCUT GCUT BCUT RDRV BDRV CNTX BRTC COLC TNTC SCOL SCNT HPOS VPOS HIT LIN VSC WID Name of adjustment R CUTOFF G CUTOFF B CUTOFF R DRIVE B DRIVE SUB CONT MAX SUB-BRIGHT SUB-COLOR SUB-TINT SUB COLOR SUB-CONTRAST HORIZ. POSITION VERT.
GENERAL ADJUSTMENTS LOCATION OF CONTROLS (Representative : 61HX70) TV front SPECIFIC INFORMATIONS Remote sensor (Behind the screen) Behind the door Power Indicator T Sst CH MENU VOL EXIT TV/VIDEO DEMO POWER VOL CH Video Audio inputs (Video3) CHANNEL st MENU DEMO EXIT TV rear ANT (75Ω) AUDIO CENTER CHANNEL IN ANT-1 OUT ON OUT L R S-VIDEO Y VIDEO PB L/ MONO L AUDIO OFF VAR AUDIO ANT-2 VIDEO Y L/ MONO PB AUDIO PR AUDIO L R VIDEO-1 VIDEO-2 IN P R COLOR R STREAM AUDIO
POWER TV POWER CABLE/SAT LIGHT SLEEP VCR MOVIE SPORTS NEWS 3 MODE switch DVD 1 2 Set to “TV” to control the TV.
ADD/ERASE function TV/CABLE function 1 Press MENU, then press S or T until the SET UP menu appears. After performing the CH PROGRAM function, you can add or erase specific channels. 2 Press t (or s) until “TV/CABLE” is highlighted. 1 3 Press : or ; to highlight either “TV” or “CABLE”, whichever you use. Select the channel you want to erase using the CHANNEL s or t button, or select the channel you want to add using the Channel Number buttons.
GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS THIS PAGE IS INTENTIONALLY LEFT BLANK.
CIRCUIT BLOCK DIAGRAM – 23 – – 24 –
MECHANICAL DISASSEMBLY 1 Speaker Grille Removal 2 Control Panel Removal 3 Front Mask Removal 4 Mask Removal A001 A201 A202 A201 A213 A224 K502 A268 K503 K501 A102 A102 5 Shield Plate, Lens Removal 6 Mirror Removal 4 screws 7 Back Board Removal 8 Light Box Removal 5 screws 4 screws K111 K112 K113 (10 screw) K601 A424 5 screws A160 A424 (A150) 3 screws 4 screws – 25 – – 26 –
CHASSIS AND CABINET REPLACEMENT PARTS LIST WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. CAUTION: The international hazard symbols “ ” in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list.
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SPECIFIC INFORMATIONS Location No. R406 R407 R408 R409 R409 R410 R411 R412 R413 R413 R414 R417 R419 R420 R421 R422 R423 R424 R425 R426 R428 R430 R431 R432 R433 R434 R435 R436 R437 R438 R439 R440 R441 R442 R443 R444 R445 R446 R447 R452 R453 R454 R455 R456 R457 R461 R462 R470 R471 R473 R482 R483 R484 R485 R486 * R487 * R488 R489 R490 R491 R492 R493 * R494 R495 Part No. Description Location No. Part No.
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Location No. * T461 Part No.
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D415 D416 D435 D436 D441 D442 D444 * D482 D520 D521 D522 D523 D531 D532 D533 D601 D602 D603 D604 D607 D608 D611 D612 D661 D704 D705 D715 D721 D761 D762 D763 D764 D781 D782 D783 D784 D801 D811 D812 D822 D823 D830 D831 D840 D841 D843 D845 D846 D851 D858 D859 D862 * D863 D864 D873 D875 D876 D877 D878 D884 D885 D891 D892 D899 Part No. Description Location No. Part No.
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Part No. Description K503 23430571 K601 K601 23430509 23430529 K601 23430528 Screen Protector, SCR-PRO61RH (61H70) Mirror, MIRROR50H (50HX70) Mirror, MIRROR55H (55HX70/55H70) Mirror, MIRROR61H (61HX70/61H70) Location No. Part No. Description SPECIFIC INFORMATIONS Location No.
SPECIFIC INFORMATIONS THIS PAGE IS INTENTIONALLY LEFT BLANK.
SIGNAL/CONV BOARD PB9581 BOTTOM (FOIL) SIDE – 57– – 58 –
DEF/POWER BOARD PB9582 BOTTOM (FOIL) SIDE – 59 – – 60 –
A/V BOARD PB9583 BOTTOM (FOIL) SIDE –61 – –62 –
HYPER PRO BOARD PB9584 DPC BOARD PB9602 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE – 63 – – 64 –
CRT/D-RED BOARD PB9586-1 BOTTOM (FOIL) SIDE CRT/D-GRN BOARD PB9586-2 BOTTOM (FOIL) SIDE – 65 –
CRT/D-BLU BOARD PB9586-3 BOTTOM (FOIL) SIDE D-COVER BOARD PB9486 BOTTOM (FOIL) SIDE – 66 –
SVM-R BOARD PB9586-4 SVM-G BOARD PB9586-5 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE – 67 –
SVM-B BOARD PB9586-6 FRONT-CON BOARD PB9615-1 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE – 68 –
SRS BOARD PB9587 BOTTOM (FOIL) SIDE FRONT-IN BOARD PB9615-2 BOTTOM (FOIL) SIDE REM BOARD PB9615-3 BOTTOM (FOIL) SIDE – 69 –
TERMINAL VIEW OF TRANSISTORS 1 2SC5144 E C 2 B 2SC3852 2SD1763A 2SC1569 2SC4544 2SA1788 2SA1306 2SA1186A 3 2SC752GTM 2SC2482 2SC2655 2SC4721P C B SPECIFIC INFORMATIONS 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 – 70 – B E CB
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 195W (Approx.) 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. 020-200026 SERVICE MANUAL COLOR TELEVISION N0PSP Chassis 50HX70, 55HX70,61HX70 55H70, 61H70 (TAC0067) (TAC0066) (TAC0069) (TAC0065) (TAC0068) TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN PUBLISHED IN JAPAN, Aug.
