NEC FP1355 Service Manual page 32

GND2 SW
15
16
Vcc2
12V
DTC
SYNC-IN
GND2
2
1
PWM Vcc2
output 12V
Figure 13. High voltage regulator IC701 block diagram
SYNC. signal
input (3pin)
Vds wave form
Threshold voltage for
MAX DUTY
adjustment (5pin)
Saw-tooth wave for
MAX DUTY
adjustment (4pin)
Err AMP output
voltage
(13pin)
RAMP wave form
PWM output
(1pin)
Id wave form
Figure 14. OFF trigger PWM control system timing chart
Condenser
connection
for DTC COMP
14 13
|
|
{
|
{
DUTY
ADJUSTMENT
3
4
SYNC Condenser Resistance
connection connection
IN
for DUTY for DUTY
adjustment adjustment
1 - 26
HV FEED Vcc1
ADJ BACK 12V
12 11
10
RAMP
GEN.
VCO
5 6 7
Is detection GND1
input
X-RAY
9
PROTECT
8
Condenser
connection
for IS
detection