Standard Horizon QUEST-X GX1500S Service Manual page 31

CPU5V
13.80 V
4.90 V
RESET
13.74 V
2.47 V
4.6 Vp-p
Max. 4.5 Vp-p
KEY BEEP: 0.5 Vp-p
90 msec
CONTRAST
Min. 1.50 V
Max. 3.24 V
3.5 Vp-p
DIMMER OFF: 0 V
DIMMER ON: 5.65 V ~ 8.19 V
DIMMER OFF: 0 V
DIMMER ON: 3.47 V ~ 4.77 V
CONTRAST
Min. 0.90 V
Max. 2.64 V
CONTRAST "15"
3.97 V
2.94 V
0.40 V
–0.63 V
–1.66 V
CNTL Unit
Circuit Diagram
3 µsec
31