HP 1349A Operating And Service Manual

Model 1349A/D AdjustmentsSECTION VADJUSTMENTS5-1. INTRODUCTION.5-2. This section describes adjustments and checksrequired to return the 1349A/D to peak operatingcapabilities when repairs have been made. Included inthis section are equipment setups and adjustmentprocedures.5-3. SAFETY REQUIREMENTS.5-4. Although this instrument has been designed inaccordance with international safety standards,general safety precautions must be observed during allphases of operation, service and repair of t h einstrument. Failure to comply with the precautionslisted in the Safety Summary a t the front of this manualor with specific warnings given throughout this manualcould result in serious injury or death. Service a n dadjustments should be performed only by qualifiedservice personnel.5-5 EQUIPMENT REQUIRED.5-6. A complete list of required test equipment is givenin Section 1, table 1-4.Test equipment equivalent to t h a trecommended may be substituted, provided it meets therequired characteristics. For best results, use recentlycalibrated test equipment.5-7. ADJUSTMENTS.5-8. The adjustment procedures are arranged in arecommended sequence of adjustments. While mostadjustments may be made independent of otheradjustments, it is recommended that adjustments bemade sequentially as a number of adjustments aredirectly related to preceeding or following adjustments.For best results, allow the instrument to warm up for 15minutes before making adjustments. See table 5-1 forsequence of adjustments.5-9. ADJUSTMENT PROCEDURES.SHOCK HAZARDThis instrument is designed and manu-factured for OEM systems. Protectivecoversare not provided and internal hazardousvoltages are exposed when power is applied.Voltages up to 20 kV are present around theCRT and HVPS areas and are capable ofcausing serious injury or death. Before anyconnections are made to the instrument, thechassis must be connected to a safetyground. Component replacement, includingfuses, a n d internal adjustments must bemade by qualified maintenance personnel.Table 5-1. Sequence of AdjustmentsAdjustmentLow Voltage Power SupplyHigh Voltage Power SupplyZ-Axis Drive and TestPattern Set-upPreliminary Focus andAstigmatismIntensity Cut-Off LevelTrace Alignment andWriting SpeedStroke GeneratorStroke IntensityImage Size and PositionVector ClosureFine Focus and AstigmatismResolution CheckAuxiliary X-Y-Z AmplifierOutput CheckOrder ofAdjustment12345678910111213ParagraphNo.5-105-115-125-135-145-155-165-175-185-195-205-205-21Scans by ArtekMedia © 2007