Toshiba DP120F Service Manual page 382

• I/OP-2 GA Signal Table
No. Signal Name Type
44, 48 THVON,
PCU
45 DEVON
47 CHVON
49 PROCHG
50 MMON
53 PMTON
54 MGON
55 FANL
57 FANH
58 PUCHKON
59 TONEREN
62 ODDET
63 SCNP
I: Input O: Output
March 2000 © TOSHIBA TEC
(3/4)
O Transfer charger current set 1 and 2 signals
Select a supply constant current to the transfer charger.
THVON
LOW
LOW
HIGH
HIGH
O Development roller voltage supply signal (H: Supply)
Supplies a constant-voltage to the development roller.
O Charge voltage supply signal (H: Supply)
Supplies a constant-voltage to the main charger and dis-
charger.
O Discharge lamp lighting/Fuse blow signal
(H: Discharge ON/Fusing)
Lights the discharge lamp in the drum unit. When a new drum
unit is installed, allows current to flow through the fuse in the
drum unit to melt it.
O Main motor drive signal (H: Driven)
Drives the main motor.
O Polygon motor drive signal (H: ON)
Drives the polygon motor in the LSU.
O MG motor drive signal (H: ON)
Drives the toner MG motor in the developer assembly.
O Fan motor low speed signal
Operates the fan motor at low speed.
O Fan motor high speed signal
Operates the fan motor at high speed.
O Drum unit detection enable signal (H: Enabled)
Enables the drum unit detect circuit to detect the status of
the drum unit.
O Toner empty detection start signal
Drives the toner empty sensor to detect the amount of toner.
I Document detect signal (L: Document present)
Detects the presence or absence of a document.
I Document position detect signal (L: Document present)
Detects that the document has been transported to the scan-
ning position.
I/O: Bidirectional
Functions
PCU
LOW
HIGH
LOW
HIGH
7-73
Output
OFF
+210µA
+180µA
+140µA
DP120F/DP125F Circuit Description