Chapter Vi Diagrams - Brother HL-4000CN Service Manual

CHAPTER VI DIAGRAMS

1. PREFACE
1.1 How to Use the BSD
1. Enter the chain specified in the chapter of troubleshooting.
2. Or enter the corresponding chain by referencing the table of contents.
3. Analyze the fault in the chain.
4. Once the fault has been located, advance to the parts index or corresponding
adjustment by referencing the Parts List number or adjustment number.
Be sure to main power switch off and unplug the machine before replacing and
removing parts. Access to a live machine's interior can cause electric shocks.
1.2 Explanations of Symbols
PL7.7
This symbol references a note usually on the same
1
page.
This symbol references the parts list. PL represents
Parts List and "7.7" indicates a plate where the
corresponding part is described. Every replaceable
part on the BSD has this symbol.
References an adjustment in the chapter of Repairs
and Adjustments. In this example, 7.7.1 means that
7.7.1
the adjustment method is described in 7.7.1 in the
chapter of adjustment.
Indicates the variable resistor that can be adjusted in
VR3
field.
TP
Represents a signal test point.
Represents the source of input to the function. In
1.3
This example, the input source is the group function
of chain 1-3.
Represents the destination of output from the
6.1
function. In this example, the output destination is
the group function of chain 6-1.
WARNING
VI-1