Toshiba DP120F, Руководство по обслуживанию

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