B+K precision 467 Скачать руководство пользователя страница 1 | Manualshive

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Содержание 467

Страница 1: ...INSTRUCTION MANUAL FOR MODEL 467 CATHODE RAY TUBE RESTORER ANALYZER DIVISION OF DYNASCAN CORPORATION 1801 West Belle Plaine Avenue Chicago Illinois 60613 INSTRUCTION MANUAL S KPRECISION ...

Страница 2: ...emission from all 3 guns simultaneously to minimize testing time 3 Simultaneous leakage measurements between all important elements No controls to adjust Even cathode to cathode leakage can be detected 4 Heater voltage G1 voltage and line voltage are precisely and simultaneously indicated on the three meters 5 Continuously variable heater voltage which can be precisely set on the meter All common ...

Страница 3: ...torage SIZE 13W x 10 x 5 WEIGHT 10 lbs 4 SAFETY PRECAUTIONS 1 The proper power line supply voltage is indicated on the chassis where the power cord enters the instrument Do not attempt to operate this instrument from a power source other than specified 2 When testing any CRT that is installed in a chassis first disconnect the chassis power plug from the AC line outlet Do not apply power to the TV ...

Страница 4: ...ion 6 9 LEAKAGE Lamps 10 G2 Control RED 11 G2 Control GREEN 12 G2 Control BLUE 13 TRACKING Pushbutton TRACKING Control 14 LIFE Test Pushbutton 15 FOCUS Test Pushbutton FOCUS OK Lamp 16 REMOVE SHORTS Pushbutton Gl K SHORTS Lamp 17 REJUVENATE CLEAN BALANCE Selector Switch 18 19 RESTORE Pushbuttons 20 21 RESTORE Ballast Lamp 22 POWER Lamp Indicates leakage from cathodes to heater or Gl and between ca...

Страница 5: ...ng alphabetical prefixes are listed at the end of the listing of tube types having numerical prefix identification OPERATION Refer to Control Panel Illustration A SET UP 1 Set FUNCTION Switch 1 to the OFF position 2 Plug the Model 467 line cord into a convenient power outlet 3 Set all variable controls fully counterclockwise 4 Locate the type number of the CRT to be tested in the SET UP CHART 5 Se...

Страница 6: ... is indicated restore the tube by using the CLEAN BALANCE procedure if a Gl K short exists use the REMOVE SHORTS procedure see RESTORING THE PICTURE TUBE 10 C SET CUT OFF 1 Rotate the FUNCTION Switch to the SET CUT OFF position The 3 meters should read zero or slightly above or below zero 2 Slowly advance each of the three G2 controls 10 11 and 12 clockwise until the corresponding meter rises one ...

Страница 7: ...OK lamp 15 If the FOCUS OK lamp glows or flickers the focus electrode continuity to the tube base pin is good 12 i i I NOTE It is also possible to check for an open interconnection in color CRT s with individual focus electrodes that are internally connected by welded straps To do this push the FOCUS test button and observe the 3 emission readings on the meters If all 3 meter readings drop approxi...

Страница 8: ...eral seconds the pointer will begin to fall Often the pointer will fall erratically or hesitate near midscale and then rise slightly before continuing to fall This behavior is usually accompanied by observable sparking and Sputtering action between the grid and cathode 3 Release the RESTORE button when the pointer reaches 0 4 or just as it crosses into the red area of the meter If the emission doe...

Страница 9: ... limit line The TRACKING control changes all three meter readings by the same percentage so that if all three pointers can be placed in the yellow area you know the guns are tracking Changing the three meter readings by exactly the same percentage is accomplished electronically by changing the duration of each test interval exactly the same amount Thus if each gun is on for only 1 6 instead of 1 3...

Страница 10: ...C RED CATHODE I t I ...

Страница 11: ...er voltage Other clues for judging life expectancy are the warm up and cool off behavior of the cathode These tests are easily performed by applying or removing heater voltage while observing emission Therefore those sections of the RESTORE pushbutton switches that interrupt the heater supply are arranged to be operative in the TEST position FOCUS TEST When the FOCUS TEST pushbutton is pressed a l...

Страница 12: ...g a much greater than normal cathode current to flow Unfortunately unless this process is very carefully controlled the cathode can easily be damaged and instead of improving performance the emission capability of the cathode is lowered or destroyed This problem is avoided in the Model 467 by pre heating the cathode and then initiating the rejuvenation cycle by means of a pushbutton which applies ...

Страница 13: ...eam current that is only the current passing through the G1 aperture which is useful for producing light output from the face of the picture tube This beam current is derived from a very small area of the cathode located directly beneath the small aperture hole in the G1 control electrode Obviously for the rejuvenation process to be successful it is from this region that emission must be restored ...

Страница 14: ...oltmeter range switch to 10V 3 Plug in 467 and set function switch to SET UP 4 Set HTR Range switch to 4 7 volts 5 Adjust SET HTR control to read exactly 6 3V on external voltmeter 6 Adjust R16 located on printed circuit board so that HTR volt meter Red B W indicates exactly 6 3V An up to date test chart is included with your Model 467 In order to keep your set up chart up to date it is recommende...

Страница 15: ...488 141 9 002 SCHEMATIC b K SYMBOL DESCRIPTION PART NO ELECTROLYTIC CAPACITORS Cl 2 3 220 if 100V DC 022 109 9 001 Cl 1 12 50 if 450V DC 021 056 9 001 C13 14 lOOOjitf 16V DC 022 084 9 001 C19 20 10 if 250V DC 021 040 9 001 Dl 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DIODES TRANSISTORS Rectifier 600 PIV 1 Amp D20 21 22 l 26 27 28s Silicon Diode 1N4148 29 1 D30 Germanium Diode 1N67 A D31 36 ...

Страница 16: ...MICROFARADS 4 ARROWS ON POT WIPERS INDICATE CLOCKWISE ROTATION 5 DIODES I THRU 19 AND 38 ARE I AMF 600V DIODES 20 THRO 29ARE IN4148 TRANSISTORS I THRU 7 ARE 2N5SSO TRANSISTORS 8 THRU 10 ARE SPS 2306 6 THIS SCHEMATIC SUBJECT TO CHANGE WITHOUT NOTICE AawZ indcate logic symbols f varies with control scttingsi MUMODEL 467 RESTORER ANALYZER CAUTION THE UNIT CONTAINS HIGH VOLTAGE SUPPLIES BE CAUTIOUS WH...

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