GE Photofact Folder 21C115 Disassembly Instructions Manual Download Page 1 | Manualshive

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Summary of Contents for Photofact Folder 21C115

Page 1: ... 4 9 Trouble Shooting Aids 12 17 Chassis Top View 3 Tube Failure Check Chart 3 RF Tuner 10 Tube Placement Chart Bottom View 8 Resistor Identification 19 20 Tube Placement Chart Top View 5 o o m O to m ft m 5 I 10 ft HOWARD W SAMS CO INC Indianapolis 5 Indiana The listing of any available replacementpart herein does not constitute in any case a recommendation warranty or guaranty by Howard W Sams C...

Page 2: ... USED IN ALL MODELS WVCN DOTTED IN FARTS ARE USED POINTS MARKED X ARE BROKEN WAVE FORMS TAKEN WITH CONTROLS StT TO PRODUCE 30 VOLT3 PEAK 1O PEAK SIGNAL AT PICTURE TUBE A PHOTOFACT STANDARD NOTATION SCHEMATIC Howord W Soms Co Inc 1954 PAGE 2 ...

Page 3: ......

Page 4: ...GENERAL ELECTRIC MODELS 21C115 21T14 Ch 21TF ...

Page 5: ...For tube location see Tube Placement chart page 5 CHASSIS TOP VIEW SET 229 FOLDER 7 PAGE 3 ...

Page 6: ...CHASSIS BOTTOM VIEW CAPACI PAGE 4 ...

Page 7: ...o o m U IO O _ m o Z _ m to m j C25 C26J C22J CC48J CC47J C46 C4 APACITOR IDENTIFICATION I PAGE 9 ...

Page 8: ...TURE OR SOUND No pic no sound has raster V2 V3 V4 V5 No pic no sound has snow VI V2 V3 No pic has sound has raster V6 V21 Has pic no sound V7 V8 V9 V10 Overloaded picture SYNC FAILURE No vert sync V12 V13 V14 No horiz sync V12 V15 No vert or horiz sync V12 SWEEP FAILURE No raster has sound V15 V16 V17 V18 V21 No vertical deflection V13 V14 Poor vert linearity or foldover V13 V14 Poor horiz lineari...

Page 9: ...ope so that 75 volt produces 2 inch vertical deflection Peak A4 thru A8 for maxitnumum response at marker frequency Adjust A4 thru A8 for response similar to Fig 2 If necessary retouch A4 AS and A6 to shape peak region of curve SOUND IF ALIGNMENT USING AM SIGNAL GENERATOR AND VTVM Connect two matched 100KB 1 resistors in series from polnt f to chassis The junction of these two resistors is alignme...

Page 10: ...195MC flOMC Swp 189MC OOMC Swp 183MC 10MC SWD 177MC 10MC Swp 85MC 10MC Swp 79MC 10MCSwp 69MC ilOMC Swp 63MC lOMCSwp 57MC 10MC Swp MARKER GENERATOR FREQUENCY 211 25MC 215 75MC 205 25MC 209 75MC 199 25MC 203 75MC 193 25MC 197 75MC 187 25MC 191 75MC 181 25MC 185 75MC 175 25MC 179 75MC 83 25MC 87 75MC 77 25MC 81 7SMC 67 25MC 71 75MC 61 25MC 65 75MC 55 25MC 59 75MC CHANNEL 13 12 11 10 9 8 7 6 5 4 3 2 C...

Page 11: ...in in in in 220Kn in in in t eaon in on INF lOOKn on tiacn INF Pin 5 t 6 TKn 220Kn t4Kn t 4Kn t 4 TKn ssn T 4 TKn t 27 Kn on 470Kn in on lOOKn t 730n on 4TOKn t eon Pin 6 t 8 9Kn i5Kn t 4Kn t 4Kn t 22 TKn t lacn t 22 TKn T5Kn on INF t 4TKS2 isoKn INF eoon t 82Kn t soon INF Pin 7 on on on on on on on on on on TOKn 2 2Kn in in isoKn in in Pin 8 t4Kn 250K 470n 15Kn 82Kn 225Kn eoon i 2Kn ison on PINS ...

Page 12: ...RF TUNER RIGHT SIDE RF TUNER LEFT SIDE PAGE 1O ...

Page 13: ...ontal oscillator coil L30 3 Bring picture closely into sync by adjusting horizontal hold control 4 Remove short across L30 5 Adjust horizontal oscillator slug Bl until picture is in sync 6 Remove short from pin 2 of VI5 to chassis Check for proper lock in of horizontal sync on all available channels The width slug B2 should be adjusted for a picture slightly wider than necessary to fill the pictur...

Page 14: ...ORIZONTAL SYNC SATISFACTORY Check by substitution Vll V12 V13 Check waveform at W6 If Satisfactory Check components associated with V13 If Unsatisfactory Check C60 R69 and other com ponents associated with Vll and V12 LOSS OF HORIZONTAL SYNC VERTICAL SYNC SATISFACTORY Check by substitution V12 and V15 Check components associated with V12B and V15especially C74 and C75 HORIZONTAL BENDING Check by s...

Page 15: ...HIGH VOLTAGE Check by substitution V15 V16 VI7 V18 V19 and V20 Check picture tube Proceed as outlined under Loss of High Voltage Check by substitution V15 V16 V17 V18 V19 and V20 Check C78 R94 R97 T2 T4A and other associated circuit components GENERAL RASTER SOUND NO PIX Follow procedure outlined under Loss of Video RASTER NO SOUND NO PIX Check by substitution VI V2 V3 V4 and V5 Check video detect...

Page 16: ...O O10 AO fW 1 1 on 5O O12 6O O13 7O O14 TS 6 TS 8 10 05 9 t J Jv 3O p 7 jv 1 W 4O O8 TSIO TS9 v f l c4 o 1O O6 2O O 3O O8 4O O9 50 010 1 y Iw W 3 2O 7O O10 1 Oil 1 30 80 1 40 012 5O 013 gO O14 TS 12 i i A o w 0 x 5 1O O9 O fir in w o W1U 1 1 i 11 1 w TS 13 1 2 3 4 5 6 Oc o r c c j w w o1 60 1 1 30 O12 4O O13 50 014 s c o o m K O _i m n Z _i m _i 50 K m 5s g nS K TERMINAL LOCATION CHART SET 229 FOL...

Page 17: ...014 RCW 3054 RCW 3014 UCG 1019 UCC 040 UCC 061 AEROVOX PART No E4D645 AFH4 52 PHS150 4 PRS25 10 SI15 BPD 0008 SI470 BPD 0008 BPD 0008 sn SNPO SI470 SI10N750 BPD 0008 SI15 BPD 005 BPD 0008 3112 BPD 0008 BPD 0008 BPD 0008 BPD 0008 SI470 BPD 0008 1469 00007 P288 05 BPD 0008 P688 1 BPD 005 SI1300 BPD 005 SI47 BPD 005 BPD 005 P488 001 P688 004 BPD 005 BPD 01 P688 01 BPD 005 P688 01 P1088 008 CENTRALAB ...

Page 18: ...ot R eq NotReq HRC 225 Not Req HHC 219 Not Req JHC 225 Not Req HC 218 lot Req IRC PART No Qll 128 Not Req Qll 228 NotReq QJ 506 Qll 139 NotReq Qll 129 Not Req Qll 139 Not Req W 4000 Not Req CLAROSTAT PART No AG 49 S KSS 3 AG 49 S KSS 3 HTV 439 AG 83 S FKS 1 4 AG 52 S FKS 1 4 AG 83 S FKS 1 4 A 43 4000 FKS 1 4 CENTRALAB PART No AB 40 AK 4 AB 75 AK 1 AB 46 AK 1 AB 75 AK 1 VK 134 Not Req MALLORY PART ...

Page 19: ...ld Attach toR2A Contrast Panel Volume Rear Attach to R3B Area Attach to R4A Horlz Hold Attach to R5A Vert Size Attach to R6A Vert Linearity Attach to R7A TRANSFORMER SWEEP CIRCUITS 24WS IS SHAFTS W17 105 P3 210 Panel tear SWITCH 76 1 RS ITEM No T2 T3 T4A B T5 T6 RATING DC RESISTANCE PRI 400 3n tap 2 8n 35 3n 44 5n 60 31 205n tap 10 in 30ft 77 32 5 1 tap 13 4n 10 in tap a 2 7n SEC on REPLACEMENT DA...

Page 20: ...resistor 270 Microhenries 47 Microhenries Includes 120f resistor 10 Microhenries IRC part CL 1 30 Microhenries Not used in all Models Parallel with 2 2Kn resistor Parallel with 22Kf resistor Drill one new mtg hole Add 120n resistor externally Add 120n resistor externally and use adaptor plate FILTER CHOKE ITEM No L33 RATINGS TOTAL DIRECT CURRENT 260ADC D C RESISTANCE 60f INDUCTANCE 0 CURRENT 1000 ...

Page 21: ... at the mid position of its range and adjust the Horiz Osc slug L30 until the picture synchronizes horizontally SOUND IF DETECTOR BUZZ ADJUSTMENT To eliminate sound IF detector buzz adjust the ratio detector secondary L29 located on top of chassis See tube placement chart FUSES One fuse is used for LV power supply protection For location see tube placement chart CENTERING Centering is accomplished...

Page 22: ...CHASSIS BOTTOM VIEW RESISTOR PAGE 19 PAGE 2 ...

Page 23: ...M VIEW RESISTOR IDENTIFICATION PAGE 2O ...

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