Service manual

CA-18
CA CIRCUIT DESCRIPTIONS
A number of secondary voltages are also provided by the sweep transformers action. Particularly, +215
volts is supplied from pin 2 to the Video Output circuitry for driving color. In addition, +35V and +25V are
supplied, respectively from pins 6 and 9, for horizontal width and pincushion control circuitry (when neces-
sary) and for vertical amplification circuitry. Filament voltage is also supplied from pin 7 into pin 1 of
connector 2F5. Two other signals from the flyback are the ABL (pin 8) and the flyback pulse derived from
pin 6. Refer to the video processor section for an explanation of these signals.
<<Figure CA-16>>
High Voltage Shutdown
Another winding from the flyback is used for high-voltage shutdown, commonly referred to as x-ray protec-
tion. Activation of the HV shutdown circuit will occur when it detects a 4 to 6 kV increase in the high
From Flyback
DX3006
CX3007
CX3003
RX3013
PROV
RX3022
ZDX3004
RX3016
RX3015
PROV
RX3008
DX3005
RX3009M
CX3004
RX3010M
RX3211
DX3252
CX3254
CX3253
+35V
To Shutdown
Pin 29, ICX2200
<<Figure CA-17>>
GND
G2
FOCUS
E
HV
TX3204
CX3207
PROV
RX3209
B+
DX3201
C3209
RX3208
+215V
CX3208
+25V
D2104
C2112
C2111
RX2124
ABL
RX3217
RX3210A
PROV
1
2
3
4
+215 V
RX3211
CX3212
RX3212
DX3204
C3219
+35V
DX3252
CX3254 CX3253
CX3207A
RX3216
+33V
Flyback
Pulse
To HV Shut-
Down Circuit
To Video
Output
2F5
6
9
7
5
8
3
2
1
H-Output