Epson Stylus Color 1520 Service Manual page 128

CR does not CR motor
operate does not rotate
normally. normally.
CPU is defective.
Sub gate array Check the waveforms of
IC5 is defective. DATA A (pin 6) or DATA B
(pin 17) of the IC17.
DATA
PF drive output
Troubleshooting
Replace the main
board or IC17.
Replace the main board.
5-11