Maintenance and Diagnostics
Service Manual 7-17
7.6.2.6 HVPS Tests
This function provides an “acceptable range” specification for the HVPS outputs.
Note
These are not actual readings.
<How to operate>
a. Press the Scroll button until “HVPS” is displayed.
b. Press the OK button to select this function.
c. Press the Scroll button until you see the name of the voltage you wish to test.
d. Press the OK button to select the test.
e. Press the Scroll button to select the appropriate Duty Cycle and press OK to start the test.
■ The test is stopped by pressing the Back button.
■ The display shows the acceptable range, shown in column 4 below.
■ The mid range (nominal) voltage is shown in column 3 below.
f. Pressing the Back button when the test is already stopped will return to Step ‘C’ above.
g. Pressing the Back button again will return to the EDC main menu.
The allowed tolerance is commonly +/- 3%, this is the value displayed. For “Dev AC” it is the value of Vpp.
T2 reverse biase tolerance of +/- 20%.
Warning
HIGH VOLTAGE!!! Do not probe these voltages to confirm output. Follow the troubleshooting
procedures in Section 8 to isolate problems to the HVPS board.
The DPT test is not for service use, factory use only.
Menu Item Description
Lower menu
Nominal Voltage
LCD indication
Acceptable Range
Charger
Supply voltage to the charger Duty 50%: -1262V
Duty 80%: -2037V
Duty 50%: -1224V ~ -1300V
Duty 80%: -1976V ~ -2098V
T1
Supply voltage to the T1 Duty 50%: 1174V
Duty 90%: 2080V
Duty 50%: 1139V ~ 1209V
Duty 90%: 2018V ~ 2142V
T2
Supply voltage to T2 Duty 50%: 1800V
Duty 80%: 4540V
Reverse Bias: -900V
Duty 50%: 1746V ~ 1854V
Duty 80%: 4404V ~ 4676V
Reverse Bias: -800V ~ 1200V
Dev DC
Supply DC voltage to the
developer
Duty 45%: -370V Duty 45%: -359V ~ -381V
Dev AC
Supply AC voltage to the
developer
Duty 35%: -2200V Duty 35%: -2134V ~ -2266V
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