NEC MultiSync FE700 Serviceanleitung Seite 139

1. PIN 1. fmin: lower limit frequency of this setting. fmin = 5.6
fmin = 29.1 kHz, Rmin = 18.7K
fmin = 22.8 kHz, Rmin =24K
2. PIN 2. Polarity of H/HV:
C = 0.1uf, Io =
POL
3. H/HV synchronous input:
When there is compatibility between TTL and CMOS, the H/HV synchronous input is within the
0.35 to 1.85 V range, and the polarity is negative.
4. Power factor control:
V4 = 0~4V = 70 to 30%, 10%/V
= 2.12V typ.(fH=<42.6kHz) / 2.00V typ.(fH>42.6kHz)
Duty = 70% - (V4*10%/V) = 48.8% / 50.0%
5. X-ray shutdown:
Specification: 1.65 to 1.8V shutdown
When B+ HV=25 kV, we have Vout = 25 V
Vout = 30.8 V
When R1 = 10.7K
6. Fly-back input threshold voltage:
Spec. : 5 Vp-p < V6 < Vcc, Vcc = 12V
Ω
R338 = 24K
7. Horizontal drive:
Low level current: Minimum 100mA
Low level voltage: Maximum 0.4V
48.36KHz: Ton = 11.01 us, Toff = 9.66 us : 53.28%
8. Pin 10 H-PHASE control:
Control gain = 8.89% TH/V
Minimum control Range =
V10 = 3.8~6.8V
9. Vref: Vref specification = 8.2 V
10. FVC filter:
FVC = 0.052 V/kHz
Ω
(When the frequency is 30kHz or more)
Ω
(When the frequency is 24kHz or more)
±
1uA , Vo = 1-e-t/RC
.
DC
Ω Ω
and R2=10K
, V6 = approx. 11 Vp-p.
±
22%TN
f = 31.5 kHz, Range =
f = 64 kHz, Range =
DC
V11 31.5KHz to 64KHz =1.734 to 3.53V
×
10
, therefore, when shutdown HV = 27.5 kV, we have
DC
, we have shutdown VOL = 26.8 to 28.2KV.
±
7.9 us
±
3.9 us
8 - 20
8
/ (Rmin*500)