SHARP SF7300
Manual de Servicio

SF-7200 SF-7M (lo) Measure the current at the front and rear frame sties. The currentd.fierence mustbe *thin 2.@. C.

Adjuetingpot Iomtlons

a. Turn the main power on and enter test command 9. The
main hgh vobge unkwill activatefor 30 seconds.

b. Measure the dmm current at the front and rear frame
sides. q When the teat harness microswitch is off, the front frame tie currentis indicatedon the meter.
q

When the test harness microewitchb on, the rear frame side drum currentis indkated on the meter.

,(OFF)

,(ON)

THV6 pot
Rear frame stie c. MAe sure that a current difference k not greater than 2.@. If the current d~erence is greater then 2.@, repface the corona unit. (11) Adjuetthe MHVG outputcurrent. q Turn the main power on and enter test command 9. The main highvohge unitwiflactivatefor 30 SSC*. q Adjustthe MHVG output adjusting@ kcated on the high vobge unit so that the MHVG outputcurrentshouM be at 27*. b. Transfer corona output adjustment: (1) Connect the ND t&t lea&to the meter, in reference to (3)a~ to 0. (2) Cban the transfer corom wire, and mount the tranafer corona urrft m the copier. The main corona unit may be mounteddurfngthe measurement. (3) Performthe procedure(3)-a@ to 0. (4) Measure the current at the front and rear frame sides. The ourrentd.tierence mustbe-in 2.~. a. Turn the main power on and enter test cornmd 10. The transferhighvoftegeunitwiflactiate for30 seconds. b. Measure the drum current at the front and rear frame Skks. q When b teat hameae microewitch is off, W front frame aide currentis indbated on the meta.
q

When the test harness mfcroawitch on, the rear frame k sfdedrum currentis itikated on the mater.

4

/(OFF)

,( ON)

c. M+e sure that 2.W.

a currant difference b not greeter than

If the current difference is greater than 2.%, reptace the corona unit. (~ Adjuetthe THVG outputcurrerrt.
q

Turn the main power on and enter teat command 10. The transferhighv~e unitwill actfvatefor 30 seconds. Adjuetthe THVG outputadjustingpot focatedon the highvoRage urrkso that the MHVG outputcurrent ehouM be at 12.0 *1.*.

..

q