Fip-1; Cautions For Fip Use - Dell 3110cn Service Manual

1.4 Cautions for FIP Use

1) It is assumed in the FIP that the printer controller (PWBA ESS) is normally functioning. If any
trouble cannot be corrected by troubleshooting, replace the printer controller with a normal one and
check for proper operation again.
If the trouble is not still corrected, replace the major parts and then related parts in succession and
confirm according to the procedure of the "Check".
2) When troubleshooting according to the FIP, normal PWBA MCU, HVPS, LVPS, FUSER ASSY,
BELT ASSY and so no
advance.
3) In the initial check according to the FIP, check only items which can be simply checked.
4) In the initial check according to the FIP, check the constitutive parts of the major check parts and
related parts, as well as major check parts.
5) When working with the printer,
specifically. Never touch live parts if not required, while the power cord is connected.
6) Connector condition is denoted as follows:
[P/J12]
[P12]
[J12]
7) [P/J1-2PIN <=> P/J3-4PIN] in the FIP means measurement with the plus side of the measuring
instrument connected to [2PIN] of [P/J1] and the minus side to [4PIN] of [P/J3].
8) [P/J1<=> P/J2] in the FIP means measurement for all terminals corresponding between [P/J1] and
[P/J2] referring to "Wiring Diagrams".
9) In [P/J1-2PIN <=> P/J3-4PIN] in the FIP where voltage is measured, [P/J3-4PIN] on the rear minus
side is always at the AG (analog ground), SG (signal ground), or RTN (return).
Therefore, after checking of proper conductivity between AGs, SGs, or RTNs respectively, the rear
minus side can be connected to the PIN of AG, SG or RTN instead of [P/J3-4PIN].
However, care should be taken not to mistake since [AG], [SG], and [RTN] are not on the same
level.
10) Measure the voltage of small connectors with the special tool. 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 if not required specifically.
12) Numerical values in the FIP are only for standard. If numerical values are approximate, they should
be considered permissible.
Version 1 2006.02.25
may be necessary for isolation of failed parts. Prepare them in
be sure to remove the power cord except when required
Connector (P/J12) is connected.
Plug side with the connector (P/J12) removed (except when attached directly to the
board).
Jack side with the connector (P/J12) removed (except when attached directly to the
board).
Chapter 1 Troubleshooting