ITEM INTERVAL
RECOMMENDED
MAINTENANCE LOG SCHEDULED SERVICE MECHANICAL
PRE-FILTER MANOMETER READINGS Weekly
INSPECT PRE-FILTERS Weekly
REPLACE PRE-FILTERS As Required
EXHAUST STACK MANOMETER READINGS 6 months
CABINET INPUT AIR MANOMETER READINGS Weekly
INSPECT TX AIR FILTERS Weekly
REPLACE TX AIR FILTERS As Required
VACUUM CABINETS Monthly, As Required
CLEAR MODULE FINS OF ACCUMULATED DUST 6 months, As Required
MEASURE BLOWER CURRENTS 6 months
CLEAN FAN BLADES AND MOTOR WINDINGS 6 months, As Required
CONNECTIONS CHECKED FOR TIGHT 6 months
INSPECTION OF MOV’S 6 months, As Required
SCHEDULED SERVICE PERFORMANCE
RECORD DATA ALL PARAMETERS ON DISPLAY PANEL ON AIR Weekly
RECORD DC INPUT AND 50 VOLT SUPPLY
CURRENTS IN BLACK, IDLE, 50% APL Monthly
VISUAL PERFORMANCE CHECKS
VIDEO LEVEL Weekly
SYNC RATIO Weekly
DIFF GAIN Weekly
ICPM Weekly
DIFF PHASE Weekly
GROUP DELAY (T PULSES) Weekly
POWER CALIBRATION 6 months
AGC SET UP 6 months
SWEEP RESPONSE 6 months
AURAL PERFORMANCE CHECKS
MODULATION LEVELS Weekly
SCA LEVELS Weekly
POWER CALIBRATION 6 months
AGC SET UP 6 months
RESPONSE 6 months, As Required
DISTORTION 6 months, As Required
SEPARATION (STEREO ONLY) 6 months, As Requried
CROSSTALK 6 months, As Requried
CONTROL CHECKOUT (SECTION II VSWR FOLDBACK, FAULTS,
ETC)
Annually
Set DATE to new year using SETUP screen Anually
Set day to March 1 On March 1, (Leap Year
only)
Table 5-1. Sample Maintenance Log
5-2 888-2365-001 Rev. B: 1/11/1999
WARNING: Disconnect primary power prior to servicing.
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