Id Sensor Error Analysis (Sp) - Gestetner B130 Service Manual

5.1.5 ID SENSOR ERROR ANALYSIS (SP2-221)
The image quality may degrade severely when the ID sensor does not operate
properly. However, there is no SC code that indicates ID-sensor malfunction.
Instead, SP2-221 shows information on the ID sensor. Check this information when
the image quality is degraded.
The table lists the information shown with SP2-221 (ID Sensor Error Analysis).
B129/B130/B168/B169:
SP
SP2-221-1 Vsg Vsg < 2.5V or
(VG in the display) (Vsg – Vsp) < 1.00V
SP2-221-2 Vsp Vsp > 2.5V or
(VP in the display) (Vsg – Vsp) < 1.00V
SP2-221-3 Power Vsg < 3.5V
(PW in the display) when maximum power
(979) is applied
SP2-221-4 Vsdp No Error Conditions
SP2-221-5 Vt Vt > 4.5V or
Vt < 0.2V
SP2-221-6 Vts
B044/B045/B046:
A defective ID sensor does not generate an SC condition, but does cause the
image quality to become worse (e.g., dirty background on the copy). If these
conditions occur, check the ID sensor output using SP2-221. (
1. Vsg ("Vg" in the display)
Error Condition: Vsg < 1.65
Possible causes:
• ID sensor defective
• ID sensor dirty
• Drum does not get charged
2. Vsp ("Vp" in the display)
Error Condition: Vsp > 1.65
Possible causes:
• Toner density is very low
SM
CÓPIA NÃO CONTROLADA
Error condition
• ID sensor defective
• ID sensor dirty
• Drum not charged
• Toner density very low
• ID sensor pattern not created
• ID sensor defective
• ID sensor dirty
• Drum not get charged
• TD sensor defective
Vg4.05,Vp0.56,PW59
Vg-Vp3.49,Vt2.16
5-81
CÓPIA NÃO CONTROLADA
SERVICE PROGRAM
Possible cause
B044M009.WMF
6.11.15)
B129 Series/B044 Series
Remarks
Power source
for the ID-
sensor light