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MM/MMC/DTV Troubleshooting Guide
Deflection SIP Board Confirmation 1. Obtain latest Chipper Check failure code and check circuit areas accordingly. IMPORTANT: DO NOT reinitialize the EEPROM! 2. If instrument is cycling, Standby & Main Supply are probably OK. If instrument is NOT cycling (dead), verify all Standby & Main Supplies before continuing. 3. Remove & secure CRT CBA. 4. Apply power and turn instrument on. 5. Check that SIP board power supplies are present at J14102 (+12V pin 16 / -15V pin 5). 6. Check for horizontal drive signal at pin 15 of J14102. 7. If the horizontal drive signal is present (step 6), the Deflection SIP board is operating. NOTE: If set is cycling, the waveform will cycle.