Zenith R56W36 Manual

Also see for R56W36: Installation and operating guide

Contents

ADJUSTMENT INSTRUCTIONThese instructions are applied to only SP-02PC chassis.Notes1.Because this is not a hot chassis, it is not necessary to usean isolation transformer.However, the use of isolation transformer will help protecttest instrument.2.Adjustment must be done in the correct order.3.The receiver must be operated for about 60 minutes proir tothe adjustment.Pre-heatrun must be operated receiving moving pictures or100% white pattern.[ Never operate the SET over 10 minutes with still picturebecause a fluorescent material may get damage.1. ADC OFFSET Adjustment1-1. Preliminary steps(1) Supply power on TV and set the TV “Power On” state.(2) Receive the SMPTE PATTERN signal.Input signal electric field intensity over 65dBuV.1-2. Adjustment(1) Select INSTART key on the Remote Control and thenselect “0. ADC OFFSET Set” with key No. 0.(2) The screen is converted into DOUBLE WINDOW PIPautomatically and CH 2 is changed into 02CH(SMPTEPATTERN).(3) Convert to first status automatically after adjustment.2. Y-DRIVE Adjustment2-1. Test Equipment(1) Oscilloscope(1CH) : 1EA- Frequency Band : Over 20MHz- Input Impedence : Over 1MΩ- Input Capacitance : below 30pF- Max Input Voltage : 50V(2) Remote Control2-2. Preliminary steps(1) Supply power on TV and set the TV “Power On” state.(2) Select “8. Y-DRIVE Adj” with No. 8 key after selectingINSTART key.So, the channel is changed to 13CH DW(TWIN PICTURE)automatically.2-3. Adjustment(1) Connect oscilloscope probe to C513 JIG POINT of PCBbottom.(2) Change data with +, - key on the Remote Control.(3) Make the LEVEL of Main/Sub signal equal.3. Raster Slant/Focus Adjustment3-1. Preliminary steps(1) Select INSTART key on the Remote Control and thenselect “3. RASTER Adj” with key No. 3.(2) Adjust Focus/Electric focus temporarily.(3) Set the convergence on reset.[ When select 3. RASTER Adj mode after entering adjustmentmode with INSTART key, the convergence reset and patternis displayed and then preparation for adjustment complete.3-2. Adjustment(1) Make Green raster using lens cover.(2) Rotate Green DY and tilt the screen like figure below.(3) Make 2 color raster with Red or Blue and Green.(4) Coincide the slope of red and blue raster to that of green.Note) 1. When adjusting raster slope, loose the DY and fastenitafter adjusting.2. Never rotate and adjust the fixed DY without loosing it.4. Beam Alignment Adjustment4-1. Test EquipmentVideo Test Generator(801GF) or Signal Generator canproduce NTSC DOT pattern(408NPS or 5518/5418equipment)4-2. Preliminary steps(1) Heat run over 60 minutes.(2) Pre-adjust Raster slope,Raster position, Centering Magner& Lens focus.(3) Check if the Magnet is located 50mm from the end of CRT.(4) In case of using 801GF : Receive #13 DOT Pattern ofVGA mode(Format #5) through PC input terminal.In case of using NTSC generator : Receive Dot signalthrough external input terminal.MechanicalCenterGreen LightRed/Blue Light