ENSONIQ EPS-16 PLUS - Page 19

ALL LEDS LIT,
NO DISPLAY
Troubleshooting Guide
TROUBLESHOOTING AN EPS-16 PLUS
WITH ALL LEDS LIT, NO DISPLAY
Test the power supply
NO ... unloaded. Go to Incorrect
:>--- --Ir.c Power Supply Voltages
YES
Force the unit into self-test mode:
Jumper the negative (left) side of
C19 to pin 13 of U20.
flow chan, p. 9.
... Replace the
~-- NO --Ir- KeypadlDisplay Board
(see
Section B).
YES
>- __ NO ___ Replace the Main
YES
YES
Replace the Keyboard/KPC
Simulator board (see Section C).
EPS-16 PLUS Service Manual
Board (see Section A).
">---NO .c Repair and retest. )
Figure 9 -
All LEDs Lit, No Display
page 15