Xerox F110 - FaxCentre B/W Laser Service Manual

General Procedures / Information
6-102 12/04 FaxCentre F110
IT / HV > see operator’s manual of test equipment (available in engineering department)
The principle of measurement is a 4-wire test method.
Description / Earth (Ground) Continuity Test / Isolation Test / High Voltage
Test
General
No start-conditions are defined; possibility of automatic or manual operation
The IT / HV test - voltage is an adjustable direct voltage (preferred instead AC)
The maximum HV test-current is 0,25 mA and therefore is regarded as safe for Service Provider
(no cover necessary)
The duration of the test is 1 second min.
After each test performed, the UUT must be discharged automatically by the IT
High voltage-Test: PSTN-line ( TNV-3 ) / housing, handset ... not applicable
Remark:performed at the Type Examination test
Test Procedure
1) Earth (Ground)-Continuity – Test -> Earth (Ground) (AC power outlet) / chassis (bottom):
To ensure the required earth (ground) continuity resistance < 0,1 ohms this test is performed in
compliance to the standard IEC / EN 60950-1:2001, clause 2.6.3.3
U
T1
max = 12 V DC ; I test = 25 A ; t min > 1 sec
2) Isolation - Test -> PSTN-line ( =TNV-3 ) / chassis / USB-earth (ground) :
To check the electric strength of the insulation between the TNV-3 and the chassis all
devices (100%) are tested at two voltages ( I max = 0,25 mA ; t min > 1 sec ):
U
T2
= 380 V DC → to check, if the protection device is assembled correctly
(e.g. no short-circuit due to loose screws)
Remark:380 V because of IEC / EN 60950-1:2001, clause 6.1.2.1: requested minimum DC spark
over voltage has to be 1,6 times the upper voltage of the rated voltage range
U
T3
= 1680 V DC → to check, if the protection device works correctly
(quality issue)
Remark: 1680 V according the datasheet of the used surge arrester: nominal DC spark over volt-
age is 1400 V ± 20%
3) High voltage – Test -> 100 % -Test primary / secondary with a voltage of
4240 V DC is performed between power source (terminal plugs) and chassis / USB-earth (ground)
in conformity to IEC/EN 60950-1:2001, clause 5.2.2 (table 3b): U
T4
= 4240 V DC;
I max = 0,25 mA; t min > 1 s
4) High voltage – Test -> 100 % - Test PSTN ( TNV-3 ) / AC power with a voltage of 4240 V DC
is performed between TNV-3 and power source in conformity to IEC/EN 60950-1:2001, clause
5.2.2 (table 3b): U
T4
= 4240 V DC;
I max = 0,25 mA ; t min > 1 s

Xerox F110 - FaxCentre B/W Laser Specifications

General

Brand	Xerox
Model	F110 - FaxCentre B/W Laser
Category	Printer
Language	English