Ricoh FT5034 Service Manual page 69

5. Timing
Main Switch
Start Key
Blade Solenoid
Erase Lamp
QL/PTL
Bias
•
T/S PCC
1st Feed MC
T/S Charge
Scanner
ID Sensor LED
Pick-off Pawl Solenoid
Toner Supply Clutch
Fusing Exit Sensor
T1: When the Start key is pressed, the PTL and erase lamp turn on. The PTL turns
off 0.12 second after the fusing exit sensor turns off.
T2: The scanner starts moving and the ID sensor pattern is exposed on the drum.
This sensor pattern is erased during normal copy cycles. But in the ID sensor
pattern check cycle, the erase mode changes from full erase to A5 lengthwise
erase 0.98 second later. Then the erase mode returns to normal full erase for the
lead edge erase 0.18 second later.
T3: When checking the toner density, the ID sensor LED turns on 1.20 seconds after
the Start key is pressed, and ID sensor output is sent to the main board.
T4: When the toner density is detected low, the toner supply clutch turns on 0.55 s
after scanner return starts.
The toner supply clutch ON time is 1.96 seconds at 30% supply ratio. This
movement continues till the next toner density check cycle.
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