IBM System/34 Maintenance Manual page 41

. 06-330
Base Power Supply' and Base Distribution
Assembly
The base ferroresonant transformer receives input AC
line voltage through CB1,contactor K1 points, fuse 301
and ACTB 1 on the AC box. See FSL page YA04O.
The transformer has five secondary outputs:
• 5 Vac to the +5V filter assembly
• 8.5 Vac to the multilevel filter assembly for +8.5 Vdc'
• 8.5 Vac to the multilevel filter assembly for -8.5 Vdc
• 24 Vac to the multilevel filter assembly for +24 Vdc \ ' _ . _,
TB1
Common
2
200V
3
20SV
220V
4
230V
235V
C65
5
:Base Ferro Transformer
. and Capacitor
16
• 24 Vac to the multilevel filter assembly for -24 Vdc
+5V
Filter
Multilevel Filter Assembly'
,..---- ---------,
J2
I
+S.5V
J4
Filter
J2
1·'J 5
1
·S.5V
Filter
+24V
Filter
·24V
Filter
l.. _ _ _ _ _ _ _ _ _ _ _ _ _
...J
Base Power Supply
+6Vdc
-4 Vdc
·5 Vdc
+S.5 Vdc
Returns
• J5 is used to !lend an overcurrent sense signal to the C·A1 board
05·330
+5Vdc
J7
·4 Vdc
+6Vdc
·5 Vdc
P
+S.5 Vdc
D
+24 Vdc
T
B
·24 Vdc
1
16
J6
PCB
Base Distribution Assembly
(---
.....
,
,,--/,'
;"-
.........
,
I
"
"
'
..
(--......
\.
~
.......
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