ocr: PLUS 4 Troublesnooting Page 3 5) I NO COLOR or BAD COLOR A) Check Ul pin 14 for 14.31818 MHz with frequency counter 0.K. If not: 1) Check solder joints of CT1 * and adjust for correct frequency 2) Check crystal, Q1 and Q2 3) Check clock circuit for opens or shorts B) Check U1 pin 13 for Color Out signal. 0.K. If not: 1) Swap U1 w/known good + C) Check modulator M1 pin 5 for Color In signal and pin 6 for Color Out signal O.K. If not: 1) Check Ml operation * D) Check FB4 and CN7 pin 6 to see if color signal is present. 1) Check for shorts 6)NO SOUND or BAD SOUND A) Check Ul pin 33 for SND signal ...
