Table 1 o.7-3. Signatures for Address Drivers and Decoders
Pin
U3
U4
U12
U13
U14
UlO
U36 U17
UIS
U21
1
667C
2
P50H
3
6F9A 0002
P50H
4
5
U759 9UP1
CH9U 3P76
6
8759
7
0356
4868 41P4 748C PHCC
5U3F
9H1H
8
uuuu
9
1U5P 4FCA 3 1AC 8069 C6P l
1FH6 3P76 9H 1P
10
36F8 U638 HC8A
8U95
1 1
4685 9CPH 6P25
55F4 C898 9H1P
12
P763 6U28 20UO 359H C898
79HU 65A5 65A5
13
18H7 H883 P26P
PU99
14
8484 37C5 1 C66 OA8U 89C7
1P50
FF4H
15
2340 5HP5 26Hl
FF4H
16
FFFF 6321
9H1H 8759
17
18
uuuu
7791
8UP9
9UP1 CH9U
ROM
The ROM can be checked using signature analysis.
1 .
Set the microprocessor to free-run as described in "Free Running
Signature Analysis" and connect the signature analyzer probes as
given in Table
1 0 . 7-4.
Table 10.7-4.
Signature Analyzer Probe connections for ROM Test
Probe Trigger
Connect to
S
tart
\
See Table 10.7-5
Stop
f
See Table 10.7-5
Clock
\
TP "E"
Ground
Ground
2. Verify the reading at micropro5 V supply is is 0003.
If
it
is not, the microprocessor is not free-running.
3. Use the data, start and stop probes to check the signatures given
in Table 10.7-5:
1 0.7-16 Servicing the Microprocessor and Front-panel
Summary of Contents for 8112A
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Page 144: ...8 32 Testing Performance ...
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Page 194: ...10 2 4 Servicing the Power Supply ...
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Page 240: ...10 4 16 Servicing the Shaper and Output Amplifier ...
Page 242: ...A R l BD RY MR I N 1 2 7 I I IJt 51 CR1 B e i 1 _ _ _ _ 20 ...
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Page 262: ...A B A2 ED RY CONTROL ...
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Page 290: ...R B c R3 BD RY M I CROPROCESSOR 1 2 3 FIGURE 1 0 7 8 ...
Page 294: ... 8 X2l 2 X2 Figure A 1 Mechanical Parts 1 A 2 Replaceable Parts ...
Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...
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Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...
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