Panasonic FP-7818 Service Manual & Parts Manual page 123

E1-01: Optical unit scan drive
When the lamp unit scanner motor drives to the optics home position
sensor and is not detected within a predetermined time.
Does the lamp unit move when the power
switch is turned ON?
YES
Is DC5V (output signal) detected on the
home position sensor connector?
YES
Does CN10-19 (output signal of CPU PCB)
change when the home position sensor is turned
ON/OFF.
YES
E1-20: Lens ratio drive
When the lens stepping motor drives to the lens home position sensor
and is not detected within a predetermined time.
Does the lens unit move when the power
switch is turned ON?
YES
Is DC5V (output signal) detected on the
lens position sensor connector CN-1 ?
YES
Does CN10-20 output signal of CPU PCB
change when the home position sensor is turned
ON/OFF.
YES
5-46
NO Lamp unit scanner motor connector is shorted
or broken.
CN114 or CN123 (of LVPS PCB) is shorted or
broken.
Lamp mechanism drive mechanism is defective.
CPU PCB is defective.
NO Is DC5V signal detected on the CN10-17 of CPU
PCB?
YES: Home position sensor connector is
defective.
NO: Check all DC5V lines.
NO Home position sensor is defective.
Home position sensor mounting position is
incorrect.
CPU PCB is defective.
NO Lens stepping motor connector is
defective.
CN115 or CN123 (of LVPS PCB) is shorted or
broken.
Lens drive mechanism is defective.
Lens stepping motor is defective.
CPU PCB is defective.
NO Is DC5V detected on the CN10-18 of CPU
PCB?
YES: Home position sensor connector is
shorted or broken.
NO: Check all DC5V lines.
NO Home position sensor connector is shorted or
broken.
Home position sensor mounting position is
incorrect.
Home position sensor is defective.
CPU PCB is defective.