B&K 1076 User Manual Download

Page: 1 / 64

TELEVISION

ANALYST

Model 1076

& K MANUFACTURING- COMPANY

1801 W. BELLE PLAINE AVENUE, CHICAGO 13, ILLINOIS

Summary of Contents for 1076

Page 1: ...TELEVISION ANALYST Model 1076 8 11 K MANUFACTURING COMPANY 1801 W BELLE PLAINE AVENUE CHICAGO 13 ILLINOIS...

Page 2: ...Figure 1 Front Panel Controls...

Page 3: ...INSTRUCTION MANUAL FOR Model 1076 TELEVISION ANALYST B K MANUFACTURING COMPANY 1801 West Belle Plaine Avenue Chicago 13 lliinois...

Page 4: ...f Audio 18 Trouble Shooting Sync Amplifiers and Sync Separator Stages 19 Trouble Shooting A G C Systems 22 Trouble Shooting Vertical Sweep Circuits 25 Trouble Shooting Horizontal Deflection Circuits 2...

Page 5: ...to drive horizontal output trans former directly in a TV receiver 11 Provides B boost indicator 12 Provides hi voltage indicator 13 Provides sensitive leakage and continuity test for horizontal outpu...

Page 6: ...Output jack This control is calibrated in peak to peak volts for both sync positive and sync negative Clockwise rotation results in positive sync Counter clockwise rotation results in negative sync 8...

Page 7: ...R F I F OUTPUT Output signal at the R F and I F frequencies are taken from this jack 7 BIAS The adjustable negative bias between O and 50 volts is avail able at this jack 8 VERTICAL GRID DRIVE Vertica...

Page 8: ...1 a 0 4 SM C 6AN8 O SC TUBE CONT ROL LAYOUT OF 1076 8 12AX7 B A SLO BLO 931A I I LINE FUSE3A 8 12AT 7 0 Q SYNC LEVEL 12AU7 COLO R osc c JXL 101 8 12AT7 6DQ6 6AX4 6CA4 IX2 08 Q 0 V 10TH B K MFG co V 1...

Page 9: ...nalyst is an economical equivalent to a standard television field Therefore it follows that the operation and adjustments of this instrument are entirely different from the average test instrument fou...

Page 10: ...is pointing when instrument horizontal frequency is the same as the station frequency 6 Tune the TV receiver to an unused channel in your area and the Television Analyst to the same channel Adjust fi...

Page 11: ...ment the word FRONT should read correctly as it is being dropped into the slide track Figure 3 Inserting slide in TV Analyst 4 Turn the Television Analyst power switch to ON 5 Set the Channel Selector...

Page 12: ...tion is reached due to the extremely low level of the signal being trans mitted This unstable condition occurs at a level too low to be useful and can be ignored 10 Turn the Audio Switch to external A...

Page 13: ...eo polarity switch because the polar ity of the signal is reversed in going through each amplifier stage Remove the video output c hle from the monitor receiver 16 Connect the ground jack on the Telev...

Page 14: ...or or remove it from its socket Note Do not turn the TV set on without any horizontal driving pulse to the horizontal output tube either from the Analyst or the horizontal oscillator of set Without dr...

Page 15: ...ut jack to the A G C buss of the test receiver video I F stages Set the R F Attenuator of the Analyst to number 10 maximum R F output Since the bias supply is very low impedance it will take over cont...

Page 16: ...take off point occurs in the second video amplifier The proper phase of video must be selected by means of the Video Polarity switcl located directly above the Video output jack We now move our video...

Page 17: ...stage to determine the actual culprit SPEAKER Figure 4 Block diagram of typical TV receiver Many service men after narrowing an intermittent trouble down to one stage find it economically sound to re...

Page 18: ...ill appears That means the R F oscillator is not causing the trouble Now we move our signal cable to the grid of the first I F amplifier C Finding the trouble still intermittently appearing we move ou...

Page 19: ...referable to start at the video end and work toward the R F tuner Also it is evident that as the technician becomes more familiar with the instrument he will skip stages for quick analysis and take co...

Page 20: ...OSS OF AUDIO This trouble shooting procedure for Audio I F Stages applies to inter carrier type of sets Let us assume there is no audio in a TV receiver Within a couple of minutes we will find the def...

Page 21: ...be discussed A fairly simple sync separator system is shown in Fig 8 This is seen to consist of the two triode sections of a 7AU7 We will assume that the pie rROM OI 7AU7 5000 MMr VIDEO SYSTEM 39 K 0...

Page 22: ...ndicates a defect in Vl or its associated circuit Voltage and resistance checks should then uncover the faulty component The level of the test sync pulses may be set at any point between O and 50 volt...

Page 23: ...d to grid No 1 The sync stabilizer control connected to the grid is adjusted so that tube current just flows with normal input signals An amplified version of the same video signal with the sync pulse...

Page 24: ...0 volts on grid No 1 and permits plate current to flow through the tube If injected test pulses at grid No 3 synchronize the image but the receiver without the injected sync pulses still displays the...

Page 25: ...AMP B B TO DETECTOR 3RD VIDEO I F AMP B b FROM VIDEO DETECTOR AG C lsr v 1D _ E _ O _ A _ M _ P _____ ro 2ND VIDEOAMP KEYED AG C E C 1 FLYBACK PULSE 47K 47K llMF 560 B K 47K 680 B B B J 4MF Figure 12...

Page 26: ...he receiver to overload We now disconnect capacitor C 1 at point E Connect a test lead from the A G C Keying Pulse jack on the Television Analyst and insert this high level pulse at the plate of the A...

Page 27: ...evelops vertical deflection then we know that the proper driving signal is not being supplied to the output stage by the vertical oscjllator The defect is either in the oscillator itself or in the cap...

Page 28: ...heck the voltage in this circuit to make certain it is present Absence of the necessary voltage indicates an open circuit in the vertical output transformer winding or an open resistor or shorted capa...

Page 29: ...this tube See Fig 15 Apply power to the receiver under test and observe the high voltage in dicator lamp 6 BQ6 H V INDICATOR CLIP ON INSUL ATED PORTION HORIZONTAL OUTPUT TRANSFORMER Figure 15 Connecti...

Page 30: ...ge from getting to the picture tube If R 4 is O K then this proves conclusively that the trouble must be in the horizontal output tube circuit It could be the screen resistor R 1 or by pass condenser...

Page 31: ...be is removed from its socket The TV Analyst is then set to deliver a horizontal plate driving pulse The lead from the Plate Drive terminal is connected to the cap lead that ordinarily goes to the hor...

Page 32: ...rcuit defect which can cause this and that occurs when capacitor C 7 Fig 16 is shorted For this condition the B voltage will be applied from the plate of the damper tube to the cathode there will be n...

Page 33: ...l output transformer neither the boost or hi voltage indicators will light This certainly points fo a defective transformer and the TV Analyst has available the neces sary tests to prove that the tran...

Page 34: ...ator and hi voltage still function as before for the same conditions and both are connected as before The ability of the instrument to check for continuity can be put to good use here because continui...

Page 35: ...found in the latter test it is indicated that the I F Amplifier is in need of proper alignment On the other hand a phase error in the former test indicates the need of Chroma circuit alignment A colo...

Page 36: ...T 0 _ _B_ _v ___ ___ _______ _ B_ v_180 f l __ JsLUE HORIZONTAL BLANKING INTERVAL o a I 210 BAR Nl 9 BLU1 4 GREEN Figure 18 Vector display showing color bars and angular displacement for each bar allo...

Page 37: ...e coarse adjustment of the hue range found inside the receiver will center the range of the hue control At this point it is well to indicate that the horizontal width of the receiver under test should...

Page 38: ...n Analyst The size of the dot supplied by the Analyst has been selected for the most accurate convergence adjustment Since static convergence is performed using only the center dot this dot is surroun...

Page 39: ...onvergence Adjustments After purity and static convergence adjustments are made you are then ready to make dynamic convergence adjustments Insert the white line slide in the generator Be sure to set h...

Page 40: ...and statically converge the three dots in the center of the raster STEP C Setup of the Horizontal Convergence Controls See Figure 24 1 Insert white line slide in Television Analyst GREEN OR RED BLUE G...

Page 41: ...receiver to obtain a tJicture displa of the best resolution Adjust VIDEO control of Analyst for good contrast and shading By observing the resolution wedges on the test pattern See Fig 25 one can dete...

Page 42: ...quency response at To set proper size set point where lines of wedge merge top and bottom of circle Bandwidth shown in megacycles __ to top and bottom edges of receiver screen Determine resolution at...

Page 43: ...ces are against the front and back of acetat e Put in typewrit er and type message in area 3 by4 inches The clear slide provided has this area marked off The ace tat e may be used again by just wiping...

Page 44: ...the opaque A painted on the slide the pattern blocks the light energy Therefore during some parts of the spot s sweep across the slide light energy strikes the photoemissive cathode of the photo tube...

Page 45: ...ator receives in the cathode circuit the output of the raido frequency oscillator V 5 Also present at the cathode is the output from the 4 5 me sound system and the output of the color oscillator Modu...

Page 46: ...de The Television Analyst is synchronized directly to the 60 cycle power line and this is accomplished in the following manner A high level signal taken from one side of the high voltage winding of th...

Page 47: ...ingle shorted turns is sufficient to disrupt the oscillator V 14B and cause the test indicator to light The power supply is very conventional V 15 a 6CA4 is a low voltage rectifier You will note that...

Page 48: ...ycles A convenient method to do this is to superimpose on a television receiver a picture from a TV station and the picture from the Television Analyst This can be most easily accom plished by having...

Page 49: ...adjusting the appropriate slug in the Television Analyst until zero beat is visually seen on the receiver screen To adjust the I F coil requires that the I F tuning selector be set to 40 me and the I...

Page 50: ...assis components are available by removing the four rubber feet and the two screws holding the perforated bottom plate to the chassis If it becomes necessary to remove the cabinet perform the followin...

Page 51: ...erial and workmanship for a period of 90 days from date of purchase Should any defect be discovered within this warranty period return the unit to the distributor from whom it was purchased BE SURE TO...

Page 52: ...esign without notice and without incurring any obligation The warranty shall be void and there shall be no warranty of any instrument or com ponent if a B K warranty registration card is not properly...

Page 53: ...90 0 0 6 3 A C 11 500 ALL PINS 15 0 6 3 6 3 165 7 0 A C A C 0 230 0 6 3 0 215 0 A C A C 0 0 0 0 85 0 0 9 10 11 12 CAP 225 270 265 6 3 A C 6 3 A C f 6 3 V A C 3 0 25 0 _ CAUTION _ DO NOT MEASURE _ 0 0...

Page 54: ...COMPOSITE VIDEO at grid G 1 V4A of modulator 1V P P Fig 5 VERTICALSYNC to G 1 V 28 of sync mixer 40V P P Fig 8 VERTICAL DISCHARGE TRIG GER PULSE at G 1 of Vert discharge V BA 140V P P JJUJ Fig 11 HOR...

Page 55: ...A 4 00 M 3 SOUND OUTPUT r 6 6 3V TO V 1 l _ 1 s 8 35GW W 5 P I LOT 1 rilll11 LIGHT R 36 R 35 3 on 12K 2W 107 V2W 107 12 0K 120K_ R 407 R 408 001 001 C 416 C 41 7 To t 1 8 G OF BOARD 2 C A l OF B0ARD 2...

Page 56: ...G C if 2 L r KA 2 __ __ LEAKAGE R t3 TO POWER oos k XFORMER 001 Iooz I SHORTED 10 10 I TURNS ISK R 219 ALL RESISTORstw 10 UNLESS OTHERWISE SPECIFIED IOOK ALL CAPACITORS IN M F D UNLESS R 18 OTHERWISE...

Page 57: ...cket Assembly Less Jewel and Bulb LS 9 Pilot Light Jewel LS 9 R Ion Trap M 2 Carton Fillers PKG 54 Tube Control Layout Label PM 22 Instruction Book PM 72 Parta Llat arid Schematic PM 73 Volta1e and Wa...

Page 58: ...r Internal CV 180 680 5 PF 500V Silver Mica Cap CM 5 500 5 50 MFD lOV Electrolytic Cap CL 50 10 50 MFD lOV Electrolytic Cap CL 50 10 RESISTORS CONfflOLS 250K Ohm Video Gain Control P 57 50K Ohm Sync A...

Page 59: ...0 Power Transformer 60 Cycle TP 15 Power Transformer 50 Cycle TP 16 Horiz Output Trans TFL 2 Vert Output Trans TA 3 Blacking Oscillator Trans T0 10 SWITCHES R F I F Select or Switch S 44 Plat e Drive...

Page 60: ...nt with Slide Guide A 159 2 31 Yoke Bracket A 152 72 Case A 154 10 50 Perforated Bottom Plate A 174 1 86 Tuner Cover A 157 63 Complete Probe Assembly ASM 43 6 36 Consisting of Red Test Lead Alligator...

Page 61: ...TMOtl I...

Page 62: ...Tll10 ff I...

Page 63: ...Tll I Off I...

Page 64: ...T Off...

Search results

Summary of Contents for 1076

Reviews:

Related manuals for 1076

Brands by name

Popular brands

B&K 1076, Instruction Manual

Search results

Summary of Contents for 1076

Reviews:

Related manuals for 1076

Brands by name

Popular brands