Brother International IntelliFax-3550 Service Manual - Page 149

Check the connection of the laser diode harness on the, relay PCB.

Get Brother International IntelliFax-3550 PDF manuals and user guides View all Brother International IntelliFax-3550 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 149 highlights

[ 5 ] Print-image related If the received or sent image has any problem, first make a copy with the facsimile equipment. If the copied image is normal, the problem may be due to the remote terminal; if it is abnormal, proceed to the following checks: Trouble (1) Completely blank Action to be taken At the scanner Check the following components: - CCD harness - Main-sensor harness between the main PCB and the document sensor PCB - Main PCB - Scanner unit At the printer side • Clean the high-voltage contacts for the developer roller on the drum unit, main cover, and high-voltage power supply PCB. (Contacts 7 in the illustration given on page VI-20) • Check the connection of the laser diode harness on the relay PCB. • Replace the main PCB. (2) All black At the scanner Check the following components: - CCD harness - LED array harness - Main-sensor harness between the main PCB and the document sensor PCB - Scanner unit - Main PCB At the printer side • Clean the high-voltage contacts for the grid and corona wire on the drum unit, main cover, and high-voltage power supply PCB. (Contacts 5 and 6 in the illustration given on page VI-20) • Check the connection of the relay-high-voltage flat cable. • Replace the drum unit. • Replace the main PCB. VI - 15

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
VI –
15
[ 5 ]
Print-image related
If the received or sent image has any problem, first make a copy with the facsimile equip-
ment.
If the copied image is normal, the problem may be due to the remote terminal; if it is abnor-
mal, proceed to the following checks:
Trouble
Action to be taken
(1)
Completely blank
At the scanner
Check the following components:
-
CCD harness
-
Main-sensor harness between the main PCB and the
document sensor PCB
-
Main PCB
-
Scanner unit
At the printer side
•
Clean the high-voltage contacts for the developer roller
on the drum unit, main cover, and high-voltage power
supply PCB.
(Contacts
7
in the illustration given on
page
VI
-20)
•
Check the connection of the laser diode harness on the
relay PCB.
•
Replace the main PCB.
(2)
All black
At the scanner
Check the following components:
-
CCD harness
-
LED array harness
-
Main-sensor harness between the main PCB and the
document sensor PCB
-
Scanner unit
-
Main PCB
At the printer side
•
Clean the high-voltage contacts for the grid and corona
wire on the drum unit, main cover, and high-voltage
power supply PCB.
(Contacts
5
and
6
in the illustra-
tion given on page
VI
-20)
•
Check the connection of the relay–high-voltage flat cable.
•
Replace the drum unit.
•
Replace the main PCB.