Control Board (A4); Block Diagram - Motorola R-20010 Maintenance Manual

OUTPUT A
11
ACIDC
14
DRIVER
OUTPUT 8
SELECT
PULSE
U3
WIDTH
l DULATOR
U2
4
OSC OUTPUT
~
SOFT·
DISCHARGE
7
START
=t_
lFT-STAR f
DEAD
AND
TIME
.OCK OUT
SELECT
Lf
C8
06
2
'
us
1
)
I
CONTROL
LOGIC
US.
05.
CR9·11
CR 17·19. 010
RELAY
DRIVER
03
~
P/0
P1 A4
AC DRIVE I
ACIDC
AC DRIVE
I
DRIVERS
U12
I
DC DRIVE
I
OC SWITC H
DC DRIVE
I
DRIVER
U11
I
CONSTANT HV CHOPPER
I
l-
DUTY CYCLE
HV CHOPPER
I
PULSE
WIDTH
MODULATOR
U4
I
I
I
I
I
LED I
DRIVERS
DC LED
07
AC LED
I
08
I
I
I
RELAY O N
I
I
'
/
35
33
'
/
'
7
29.30
'
/
27.28
'
/
19.20
'
/
17,18
'
/
37
'
/
25
'
32
/
36! I J O 1 0
LOW-VOLTAGE POWER SUPPLY
CONTROL BOARD (A4)
(RTP- 1009A)
Figure 8-5. Block Diagram
8-9