Compaq LA36 Service Manual page 125

d. HDLSI
+34V
Head
fire
check
SG2
Short-mode
SG1
detection
circuit
+34V +34V +34V
SG2
Detection
circuit
Long-mode
detection
SG2
SPALMS SPALMS
LFALMS LFALMS
SPALML
LFALML
HDALM
Figure 5.38 Fire check circuits
+34V
Detection circuit
Motor
fire
check
Time
constant
circuit
SG1 SG1 SG1
Compare circuit
+5V +5V
Time
constant
circuit
+
-
SG1 SG1
SG1
HDLSI
MBCU20050
624µs
timer
7s timer
27s timer
624µs
timer
Compare circuit
+5V +5V
+
-
SG1
PWSTOP
LS06