ocr: - - - commodore ISSUE 15, 1985 : DISK DRIVE 4 TECHTOPICS MODEL : 1541 0 1980 COMMLDORE BUSINESS MACHINES INC. RE: COMMON FAILURE SYMPTOM: DRIVE RUNS CONTINUOUSLY. TROUBLSHOOTING GUIDE: 1) Check system RESET - 6502, Pin 40 2) Check system ROMS 3) Check 7417 driver - UD2 4) Check R/W - Must be LOW (Not above 4.0V) 5) Check for cold solder joint at J7 (Newtronics only) 6) Check MTR signal - UC2, 6522 7) Check MTR signal - UC1, PLA NUMEROUS CALLS HAVE COME IN TO THE TECH HOT LINE CONCERNING THIS FAILURE INDICATION. PLEASE REFER TO THIS CHECK LIST BEFORE CALLING FOR HELP.
