RCA free download

File name ctc203.pdf

CTC203 TROUBLESHOOTING Main Troubleshooting Flow Chart Dead Set EEPROM Error Codes System Control Power Supply Horizontal Vertical Tuner Tuner Band Switching Color Video Buttons Infrared OSD Gemstar F2PIP Analog Comb General Audio Problems Distorted Audio Stereo Seperation No Stereo Sound Logic 7-2 7-3 7-4 7-5 7-6 7-7 7-8 7-9 7-10 7-11 7-12 7-12 7-13 7-14 7-15 7-16 7-18 7-20 7-20 7-21 7-22 Page 7-1 Return To Main Flow Chart CTC203 TROUBLESHOOTING DEAD SET TROUBLESHOOTING Set Will Not Turn On Degauss Relay Switching YES ON/OFF? NO Check EEPROM Error Codes Using Chipper Check Microprocessor U13101 Reset YES Pin 51 = 5V? NO Check System Control Check Power Supplies Page 7-2 Return To Main Flow Chart CTC203 TROUBLESHOOTING EEPROM Error Codes Error code: HEX DEC Chassis: Error: POWER CONTROL ERRORS Action 00 01 03 08 09 0A 0B 10 12 HEX 22 2C 66 80 A0 BA C4 C6 0 1 3 8 9 10 11 16 18 DEC 34 44 102 128 160 186 196 198 ALL ALL ALL ALL ALL w/ F2PIP ALL ALL ALL w/Gemstar w/ F2PIP w/Gemstar ALL EEPROM ALL ALL ALL No Errors 16V_STBY fault 12V_RUN fault T4chip XRP (X-ray protection) T4chip POR (power on reset) F2PIP POR Stereo Decoder POR Run I2C bus latched Standby I2C bus latched I2C ACKNOWLEDGE ERRORS Failure to get acknowledge from Gemstar module F2PIP fault Gemstar bus fault Stereo Decoder fault EEPROM bus fault T4chip fault Main Tuner PLL bus fault Main Tuner DAC bus fault Check Power Supplies Check Power Supplies Check Power Supplies Check Horizontal Check F2PIP Check General Audio Check System Control Check System Control Check Gemstar Check F2PIP Check Gemstar Check General Audio Check System Control Check System Control Check Tuner Check Tuner Page 7-3 Return To Main Flow Chart CTC203 TROUBLESHOOTING System Control Troubleshooting Microprocessor U13101 Pin 51 = 5V? YES NO Check Micro Reset Circuit. Q13501, Q13503, etc. Check R13128, R13181,Q13104. U13101 Pin 20 should be High Impedance. If not replace. EEPROM U13102 Pin 8 = 5V? YES NO U13101 Pin 20 ~4.5V? NO YES Replace Q13104 Microprocessor U13101 NO Pins 40,42 = 4MHz? YES Replace 4MHz Crystal Y13101, R13107,C13106,C13107 Plug in AC. Check Bus Activity on U13101 Pins 23,24. Do Transmissions NO Stop after a few moments? Check EEPROM and Power Supplies YES Microprocessor U13101 KD1 Pin 5 = 5V Pulse? YES NO Check Power Supply Note: Pin 5, Drive Line, should have a 20ms pulse. If this pulse is seen on a sense line then a button is closed. Microprocessor U13101 Sense Lines Pins 6,7,8 = Steady NO 5V with No pulses? YES Check Front Panel for Stuck or Shorted Button or Missing 5V. Check EEPROM Error Codes Using Chipper Check Page 7-4 Return To Main Flow Chart CTC203 TROUBLESHOOTING Power Supply Troubleshooting Raw B+ @TP14210 ~ 150V ? YES NO Check F14201, R14202, CR14201-CR14204 +16V stanby Cathode CR14108 ~ 16V? YES NO Check CR14108 RegB+ Cathode CR14106 ~ 130V? YES NO Check RegB+ Circuit. R14116,U14101,U14102, Q14102,Q14103,Q14106,Q14107,Q14101 +5V