Lexicon LXP-5 Service Manual

Performance
Verification Lexicon
Performance
Verification
Front Panel
Diagnostics
Table 1
Diagnostic Test Programs
accessed by FUNCTION knob
Inspect the unit for any obvious signs of physical damage. Verify that all pots,
the MIDI OUT/THRU selector switch, the LEARN momentary push button and
the 16-position rotary switches operate smoothly and correctly. (Refer to the
LXP-5 Owner's Manual for detailed explanations of functionality.)
Verify that all screws and rear panel jacks are secure.
Inspect the AC power transformer for any signs of physical damage. Make
sure its output rating is 9VAC at 1.5 Amp and the appropriate 5mm/2.5mm
barrel connector is attached.
Power on the LXP-5 while holding in the LEARN button on the front panel of
the unit. When the LEARN button is released, the LXP-5 will enter Diagnostic
Mode and will be awaiting the selection of a diagnostic test.
Diagnostic test programs are selected by turning the FUNCTION knob to one
of its 16 positions (see Table 1 below). Slave Tests and Alternative System
Exits also require a turn of the ADJUST knob to choose the specified
diagnostic program. (See Tables 2 and 3.) Once a diagnostic test has been
selected, the program is activated by pressing and releasing the LEARN
button.
Generally, a test is performed once and the results are displayed upon
completion of the test. In the case of tests marked by an asterisk (*) the tests
are performed continuously; the results are displayed when the LEARN
button is pressed and released a second time.
Unless noted otherwise in the test descriptions, successful completion of a
diagnostic test is indicated by red flashing of the bicolor LEARN LED (located
at the far right of the front panel). Failure is indicated by alternate red flashing
of the LEARN LED and the OVLD LED (located at the far left of the front panel)
The following tables show the available diagnostic tests . For convenience,
some related tests are grouped together under another test, such as Run All.
FUNCTION Knob
Position
Diagnostic Test
Program Names
BYPASS
LED test
EDIT C
Run All Master tests
EDIT B
Rotary Switch test
EDITA
Clear RAM test (special
procedure required)
MULTI
Non-volatile memory test
CHORUS
Footswitch test
DELAY
Audio Test Loop (runs continuously)
PITCH
Exit to system
USER 1
ROM test*
USER 2
Master RAM test*
USER 3
Master address test
USER 4
Master interrupt test*
USER 5
MIDI wraparound test
USER 6
Slave tests (requires selection via ADJUST)
USER 7
DRAM test
USERS
Alternative system exits (requires selection
via ADJUST)
2-2

Lexicon LXP-5 Specifications

General

Brand	Lexicon
Model	LXP-5
Category	Recording Equipment
Language	English