Brother HL 2060 - B/W Laser Printer Service Manual page 97

M-12 "55 HIGH VOL MALF" is displayed (Faulty output from the H.V.P.S. ASSY)
Possible cause Step
Main PCB 1
HV harness 2
High-voltage
power supply
PCB
Check
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?
Pin No.
1 2 3
6 7 8 9
2 3
7 8 9
3 4 5
8 9
10
4 5
9 10
5
6 7
11 12 13 14
16 18 19 20
17
7 8
12 13 14 15
18 19 20
17
8 9 10
13 14 15
18 19 20
9
10
14 15
10
15
11 12 13 14 15
16 17 18 19 20
12 13 14 15
13 14 15
18 19 20
14 15
15
16 17 18 19 20
Is the voltage of the each pin of the high-
voltage power supply PCB connector P2
turned on and off?
Signal name Voltage
(reference
value)
4 5
/HV1AC 0V
5.8V
10
4 5 /HV1DC 0V
10.0V
10
/DBAC 0V
6.3V
/DBDC 0V
9.8V
DNSTY 1.0 ~ 4.0V
/HVT1 8 9 10 0V
15
23.0V
9 /HVT2 0V
10
17.6V
/HVT3 0V
10.0V
HVT4 0.2 ~ 5.0V
HVTFB 0.2 ~ 5.0V
TONER1 0.0 ~ 3.5V
0V 0V
TONER2 2.0 ~ 4.5V
24VRET 0V
24V 24V
HVHALFN 0.0 ~ 10.0V
VI-15
Result Remedy
No Replace the main PCB
assy.
Remarks
Default: 1.9V
No Replace the HV harness.
Yes Replace the high-voltage
power supply PCB assy.