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FILE NO. 023-200213
SERVICE MANUAL
COLOR TELEVISION
N2PS Chassis
32HF72, 32HFX72
(TAC0233) (TAC0232)
– SUMMARY –
32HF72, 32HFX72 are the same as 36HFX72 except for the parts tabled on back of this sheet.
Use this service manual together with the service manual of 36HFX72, 36HF72 (File No. 020-
200206).
PUBLISHED IN JAPAN, Jul., 2002 So
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REPLACEMENT PARTS LIST DIFFERENCES Location Location Part No. Description Part No. Description No. No. A201 23530371 Front Cover (32HF72) R601 24011822 Chip, 8200 ohm, 1/20W A201 23530372 Front Cover (32HFX72) (32HF72) A213 23428095 Door (32HF72) R602 24011822 Chip, 8200 ohm, 1/20W A225 23445611 Button, Power (32HF72) (32HF72) A225 23445612 Button, Power (32HFX72) R663 24011822 Chip, 8200 ohm, 1/20W A411 23540031 Back Cover (32HF72) A701 23064255 Carton (32HF72) R664 24011822 Chip, 8200 ohm,
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FILE NO. 020-200206 SERVICE MANUAL COLOR TELEVISION N2PS Chassis 36HFX72, 36HF72 (TAC0230) (TAC0231) TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN PUBLISHED IN JAPAN. Jun. 2002 So
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TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ........................................................................................................................................ 3 SET-UP ADJUSTMENT ............................................................................................................................................ 4 SERVICE MODE ...................................................................................................................
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CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” INSTRUCTIONS BELOW. X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazard- 2. This receiver is equipped with a Fail Safe (FS) circuit which ous X-RAY RADIATION. To avoid such hazards, the high prevents the receiver from producing an excessively high voltage must not be above the specifie
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WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. SET-UP ADJUSTMENT The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in order as follows : 1. Color Purity 2. Convergence 3. White Balance Note: 1.The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical positioning. Refer to figure 1. 2
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CONVERGENCE ADJUSTMENTS 4-POLE NOTE: Before attempting any convergence adjustments, MAGNETS the receiver should be operated for at least fifteen 6-POLE minutes. MAGNETS CENTER CONVERGENCE ADJUSTMENT 1. Display built-in cross-dot pattern using the TEST SIG- NAL SELECTION function. 2. Adjust the BRIGHTNESS and CONTRAST Controls for well defined pattern. 3. Loosen the tightening ring and adjust two tabs of the PURITY 4-Pole Magnets to change the angle between them MAGNETS (See figure 4.) and supe
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WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF SERVICE MANUAL. (SET-UP ADJUSTMENT FOR FLAT TUBE) The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in order as follows : 1. Color Purity 2. Convergence 3. White Balance Note:The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical positioning. Ref
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(5)Adjust the sub-4-pole magnets only in case there is any deviation of Xv bow-shaped convergence. (To be usually set at the initial position) Align both sides with the sub-4-pole magnets and minimize the deviation of blue and red with the main 4-pole magnets. Xv bow-shaped deviation of convergence red/blue blue red/blue blue blue green red red red green Main 4-pole magnet 6-pole magnet Sub-4-pole magnet CIRCUMFERENCE CONVERGENCE: Perform correction in the following manner. * • Adjust coils
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SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press MUTE button twice 2) Press MUTE button 3) While pressing the MUTE button, on Remote Control. again to keep pressing. press MENU button on TV set. S 1/2 MUTE MUTE (Service mode display) 2. DISPLAYING THE ADJUSTMENT MENU 1) Press MENU button on TV. Service mode Adjustment mode Item Press S Data Press 3. KEY FUNCTION IN THE SERVICE MODE The following key entry during display of adjustment menu provides special functions. A single horizontal line
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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 14) 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 o
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8. SELF DIAGNOSTIC FUNCTION 1) Press “9” button on Remote Control during display of adjustment menu in the service mode. The diagnosis will begin to check if interface among IC’s are executed properly. 2) During diagnosis, the following displays are shown. SELF CHECK NO. 23 * * * * * * POWER : 000 BUS LINE : OK BUS CONT : OK BLOCK : UV V1 V2 or QV01 QV01S SYNC Part number of microprocessor (QA01) Operation number of protection circuit (current limiter) . . . . “0
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ELECTRICAL ADJUSTMENTS ITEM ADJUSTMENT PROCEDURE FOCUS VR ADJ 1. Enter the service mode, then select any register item. 2. Press the TV/VIDEO button on the Remote until the black cross-bar pattern ap- pears on the screen. 3. Adjust the FOCUS control (on T461) for well defined scanning lines on the picture screen. SUB-BRIGHTNESS 1. Constrict the picture height until the verti- (BRTC) cal retrace line appears adjusting the item HIT (HEIGHT). 2. Adjust the CONTRAST control to the mini- mum. 3. Cal
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ITEM ADJUSTMENT PROCEDURE E-W PARABOLA (DPC) 1. Call up the adjustment mode display, then select the item PARA. (PARA) 2. Press the TV/VIDEO button on Remote until the cross-hatch pattern appears on the screen. 3. Press the VOLUME s or t button to make vertical lines straight as shown below. HORIZONTAL POSITION 1. Call up the adjustment mode display, then select the item HPOS or VPOS. (HPOS) 2. Press the TV/VIDEO button on Remote until the VERTICAL POSITION white cross-bar or black cross-bar pat
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CIRCUIT CHECKS HIGH VOLTAGE CHECK Troubleshooting Guide for Fail Safe Circuit CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps below. Check that the set returns to normal operation when pin 12 1. Connect an accurate high voltage meter to the second an- of Z801(or emitter of Q472) is grounded with jumper wire. ode of the picture tube. 2. Turn on the receiver. Set the BRIGHTNESS and CON- YES NO TRAST controls to minimum (zero beam current
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CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS 36" HIGH VOLTAGE AT ZERO BEAM: (A) 32.7 kV MAX HIGH VOLTAGE: (B) 34.1 kV Table-1 SERVICE MODE ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE: Item Name of adjustment Preset Data Item Name of adjustment Preset Data RCUT R CUTOFF 40H ← PARA E-W PARABOLA 16H ← GCUT G CUTOFF 40H ← CNR E-W CORNER 13H ← BCUT B CUTOFF 40H ← TRAP TRAPEZIUM 33H ← GDRV G DRIVE 40H ← HCP H-CONMPENSATION 02H ← BDRV B DRIVE 40H ← VFC V-F C
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LOCATION OF CONTROLS (Representatives: 36HFX72) TV Front MENU Video/Audio inputs VOLUME T S (Video 3) CHANNEL ts DEMO MENU TV/VIDEO VOLUME CHANNEL VIDEO-3 IN S-VIDEO VIDEO L/MONO-AUDIO-R POWER MENU T Sts TV/VIDEO Remote sensor DEMO Power indicator TV Rear ANT(75 ) ANT-1 OUT ANT-2 IN IN OUT S-VIDEO COLOR COLOR VIDEO STREAM STREAM VIDEO Y Y HD - 1 HD - 2 VAR AUDIO L/ L/MONO PB PB MONO L L AUDIO CENTER AUDIO CHANNEL IN L AUDIO AUDIO AUDIO R PR PR ON OFF VIDEO-1 VIDEO-2 R R R R ColorStream Vari
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Remote Control Power turns the TV on or off SLEEP sets the TV to turn at a specific time LIGHT The initial press of the LIGHT button causes two actions: Channel Numbers (0–9, 100) allow direct access to channels MODE cycles through the 6 device modes FAVOURITE allows access to Multi-Window function PIC SIZE cycles through the three picure formats MENU allows access to programming ENTER sets programming menu information stT S selects or adjusts programming menus [FAV] T S selects your favourite c
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PROGRAMMING CHANNEL MEMORY The channel memory is the list of TV channel numbers your TV will stop on 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. Note: If you utilize both ANT-1 and ANT-2 terminals for some model, perform programming channels for each input source. TV/CABLE
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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 com- ponents 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. The mounting pos
