Dell 3115cn Service Manual page 29

2) When troubleshooting according to the FIP, normal PWBA MCU, HVPS, LVPS, FUSER ASSY,
BELT ASSY and others
advance.
3) In the initial phases of FIP, check all items that can be simply checked.
4) In the initial phases of FIP, check not only the major parts but also their constitutive parts and the
related parts.
5) When working with the printer,
Never touch live parts unless required, while the power cord is connected.
6) Connector condition is denoted as follows:
Mated plug and jack of the connector (P/J12).
[P/J12]→
[P12]→Plug of the connector
[J12]→Jack of the connector
7) [P/J1-2PIN <=> P/J3-4PIN] in the FIP denotes a measurement with the positive side of the mea-
suring instrument connected to [2PIN] of [P/J1] and the negative side to [4PIN] of [P/J3].
8) [P/J1<=> P/J2] in the FIP denotes measurements at all terminals existing between [P/J1] and [P/
J2] as shown in "Wiring Diagrams".
9) When a voltage measurement is involved in [P/J1-2PIN <=> P/J3-4PIN] in the FIP, the negative
side [P/J3-4PIN] is one of AG (analog ground), SG (signal ground), and RTN (return).
Therefore, after checking conductivity between AGs, SGs, or RTNs respectively, the negative side
can be connected to the PIN of AG, SG or RTN instead of [P/J3-4PIN].
10) Use a proprietary tool to measure the voltage of miniature connectors. Handle the tool with care,
as the leading edge of the tool is pointed.
11) When measuring the voltage, set the BELT ASSY, toner cartridge and paper cassette, close the
COVERs and power ON unless otherwise specified.
12) Numerical values in the FIP are only for guideline purposes. Approximate values are acceptable.
13) Note that the parts specified in the FIP to be removed and their removal process are not specifi-
cally referred to here.
14) "Replacement" in the FIP denotes that the suspicious parts or their parent part (high assy) is to be
replaced and checked.
15) The FIP describes the first cassette on the lower part of the printer as "Tray 1," and the second
cassette as "Tray 2".
16) The FIP procedure varies depending on specifications. Correct troubles according to the instruc-
tions in the FIP.
17) Troubleshooting of some optional parts must be performed according to the manuals for those
parts. Have the relevant manuals at hand.
1.5 Items to Confirm before FIP Troubleshooting
1.5.1 Basic Printer Problems
Some printer problems can be easy to resolve. If a problem occurs with your printer, check each of the
following:
1) If a message is displayed on the LCD of operator panel, see "2.3 Status Code List" or "2.4 LSCD
Display".
2) The printer power cable is plugged into the printer and a properly grounded electrical outlet.
3) The printer power is ON.
4) The electrical outlet is not turned off at any switch or breaker.
Version 1 2006.11.21
may be necessary for isolation of failed parts. Prepare them in
be sure to remove the power cord unless otherwise required.
(P/J12) (except when attached directly to the board).
(P/J12) (except when attached directly to the board)
Chapter 1 Troubleshooting
.