HP 214B Operating And Service Manual

( POWER ON )'------,--------'MEASURE POWER SUPPLYA4TP5" -133 VA4TP1 " -155 V .:I 22 V-5.2 V; +5 V+15 V; -15 VVC0602 = 1/2 VCQ601P.S. VOLTAGESOK?yREMOVE WIRE 927FROM A4 POWER SUPPLYBOARDUSING EXTENDER BOARD00214-66590 CONNECT A1BOARD...."""A2TP5Nr---l r----l -.5 VJ W l---1.8VAlTPBA2TP5OK?ySHORT A 1 R478NDEPENDING ON AMPLITUDEVERNIER SETTING+6 V TO +16 Vy....DISCONNECT 214BFROM LINE POWERAND REMOVE A1OUTPUT AMPLIFIERBOARDA2TP3n n +3.8 VI U L+1.3VA1TP1I .....l +9.3 V,......-''----'--- +7.5 V, +5.6 V214B SETTINGS:·PERIODPOSITIONWIDTHAMPLITUDEOUTPUTPOLARITY10 "'2", DEL3 "'3 V - 10 VNEGIREPAIR POWER SUPPLY(see Troubleshooting Hints)A2TP4nn -· 5V-2.2 V..-..AlTP6+16 V DCAlTP2n h +3.2V~;I U L+.2V··.....DEL. ADV. D.P. CIRCUITAlTP7-.3 V DCAlTP5~ Il +19V I--I U L+12VAlTP3 AlTP4n n +6Vto+16VI U L+.5V~~~N___~..YREMOVE POWER CORDREMOVE SHORT FROMA1R478MEASURE RESISTANCE ACROSSA1R420 = 9.5 nA1R432 = 9.5 nMEASURE SCREEN GRID RES.A1R486 = 560 nA1R490 = 560 nyCONNECT WIRE 927TO THE POWER SUPPLYBOARD AND APPLYLINE POWEROVERLOAD LED SHOULDSWITCH OFF AFTER 1 MIN.CHECK ATTENUATORAlTP1 AlTP2.-l .-l +9.3 V...-'----,--''---- +7.5 V I---~'"+5.6 Vh h +3.2 VI U L+.2V. CHANGE RESISTORAND CORRESPONDINGTUBE..CHECK FET"SQ408/Q418CHECK FET DRIVERSA405; Q406; Q407;Q415; Q416; Q417USING AN OHMMETER. CHECK ANDREPLACE IF NECESSARY:A1VR410; A1CR411; A1CR412; A1VR404;A1CR408; A1CR409; A1CR418; A1CR419;AlVR430Service~-t--8-5Scans by ArtekMedia => 2009