ENSONIQ ASR-88 - Troubleshooting All LEDs Lit, No Display

Checking the Display
ALL LEDS LIT,
NO DISPLAY
z
Are the power supply
voltages correct?
YES
*
TROUBLESHOOTING AN ASR-10
WITH ALL LEDS LIT, NO DISPLAY
Force the unit into self-test mode
Jumper the negative (left) side
Cl9 to Din 13 of U20.
NO Repair and retest.
Reulace the KevboardXPC
imulator board (see Section
Figure 13 -
All LEDs Lit, No Displav
18
ASR Service Manual