IBM System/360 2050 - Page 109

2. Add the following temporary jumpers:
M4K6B10 (GS111BN4) to M4K6B02 (GS111AK4)
M4K7D04 (GS111BP4) to L3F6D04 (GE191BA4)
3. Check all points in Figure 105.
4. Set channel control switch to selector channel
position; set channel selector to correct channel.
5. Se't address key 9 down (if STOP SEL).
6. Scope test point *1 in Figure 105.
7. Set address key 10 down, address key 11 up
(10 code ITDl and IT); press enter pushbutton. Pulse
should change from solid to solid plus dotted line.
8. Press system reset pushbutton.
9. Repeat step 7 and 8 scoping test points *2
(code 01 = 10 up, 11 down) and *3 (code 11 = 10 down,
11 down) (Figure 105).
10. Remove jumpers installed in step 2 and reset
channel control switch to normal position.
Page and
0 1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Test Point Net No. Line Title 100 Nono~econds/Oiv
K4H7006 GB171AQ4
-Trf to
Pos Reg
K4B5012 GA131AP4
+CC Step
l
0 Ph A
K4C7BIO GA131AQ4
+CC Step
J l
0 Ph B
K4B5010 GA131AR4
+CC Step
1 Ph A
I
1
K4C7B09 GAl31A54
•CC Step
1 I
1 Ph B
K4B6D04 GAJ31BL4
+CC Step
2 Ph A
L
I
-No Poll
v-
K4G2B10 GF121AG4
Reset Reg
L3C2012
GE191AQ4
-Ch Reset
L2
-Inst
K4C3006 GFl21AA4
Scan Start
1.
r
FIGURE 103.CYCLE COUNTER
Indicator Check
1. Check that the following indicators are on or
rippling:
Roller
Position
3
4
5
5
5
6
Indicators
Byte Counter: A and Bparity bits only
CC Phase: O, 1, 2; Clock: AO, Al,step
Pos Reg Trf; A Clock:A,B,C,D,
SP: 02
Instruction Scan
Byte Counter Mod Enable
FIN (Flag Reg Unpredictable)
108 (3/71) Model 50 FfMM
On
Rippling
Rippling
On
May be on
dimly or not
visibly lighted
On
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0 1 2 3 4 5 6 7 8 9 10
Test Point
Net No.
Line litle 100 Nanoseconds/Div
L3F6010 GE191A24
-Eorly
~
Reset
K4E2808
jGAJ21AA4
>B Clk
,--i__
K4H7812
pA121AN4
-B Clk
~
K4F6810
GAl21AG
-GP to
~
BC Set B
K4E4810
jGA121AY4
-GP to
~
BC Set A
K4C4005
pA121AH4 -Clk B2
--v--
K4J6005
pA121AP4 -B Clk
~
FIGURE 104. B CLOCK
Page and
0 I
2 3 4 5 6 7 8 9 10 11
Test Point
Net No.
line Title
100 Nanoseconds/Div
M4K7009 GS111AL4
'-
J
N3F2010
GR I 11AM4 +ITD 1
~---·1
N3E4DIO GR I 11AL4 +ITD2
~
N3F6010 GR ll1 BE4 +ITD3 J
N3E4012 GR111AW4
+ITD 1
~
•2
Not 2
N3E4004 GR111BW4
+ITD2
~
•3
Not 3
N3E5DI I GR111BM4
+Svc
~
In Dly
M4J2006 GSl11BQ4
+IF Svc
~
Lth
N3D2DIO GR111AC4
+Not
~
ITD I
FIGURE 105. TAG GENERATOR
A-Clock Manual Controls
1. Set channel control switch to selector channel
position; set channel selector for correct channel.
2. Using address keys 10 and 11 as follows,
press enter pushbutton and check for correct results:
Code
Address Keys
Position
01
10 up and 11 down
Stop AO
11
10 and 11 down
Stop Al
10
10 down and 11 up
Stop CS
3. Set channel control switch to normal position.
4. Return address keys to normal position.