Brother HL-1260 User Manual
Page 93
VI
- 16
Possible cause
Step
Check
Result
Remedy
Main PCB
1
When a test print is carried out, is the voltage
of the each pin in the main PCB connector
P6 turned on and off as the below list?
No
Replace the main PCB assy.
HV harness
2
Is the voltage of the each pin of the high-voltage
power supply PCB connector P4 turned on and
off?
No
Replace the HV harness.
M-13
Yes
Replace the high-voltage
power supply PCB assy.
"55 HIGH VOL MALF" is displayed (Faulty output from the H.V.P.S. ASSY)
High-voltage
power supply PCB
Pin No.
Signal name
Voltage
(reference
value)
Remarks
/HV1AC
0V
5.8V
/HV1DC
0V
8.6V
/DBAC
0V
6.3V
/DBDC
0V
8.6V
DNSTY
1.0 ~ 4.0V
/HVT1
0V
8.7V
/HVT2
0V
15.1V
/HVT3
0V
9.0V
HVT4
0.4 ~ 5.0V
HVTFB
0.4 ~ 4.0V
TONER1
0.0 ~ 3.5V
0V
0V
TONER2
2.0 ~ 4.5V
24VRET
0V
5V
5V
24V
24V
1
2
3
4
5
6
7
8
9
10
11
13
12
14
15
16
Default: 2.5V