Panasonic PT-CW230E, Руководство по обслуживанию

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IC Block Diagrams
●
M62393 <DAC,IC7881>
●
MR4010 <Power switching, IC631>
R
Q
S
GND Emitter / OCL
VIN VCC Collector
Start-up circuit UVLO
comparator
Start-up circuit
Soft drive circuit
OCP threshold comparator
Burst mode OCP threshold comparator
Restart timer
Latch circuit reset
comparator
UVLO comparator
V
UL
V
CC(start)
/V
CC(stot)
V
CC(startup off)
/V
CC(startup on)
V
TH(OCL)
V
TH(burst limit)
Q1
V
OVP
V
ref
I
F/B
OVP comparator
Thermal Shutdown circuit
Zero current detection
circuit
Turn-on dead timer
Standby circuit
ON width timer
S
Q
R
+
-
+
-
-
+
-
+
-
+
-
+
1
2
3
4
-
+
7 9
5
Z / C
F / B