Service manual

Table 3-10. Secondary Microprocessor Signature Analysis

Description: These signatures check secondary microprocessor U301 and latches U302 and U330. The signatures are valid

for U301 firrnware revisions ''Rev A.02.01". Use the test setup described in "Test Setup for S.A. "

Signatures:

Front Panel Display = ''INPUT DWN"

U301 U302 U330

+ 5V U301-7,4,9,21,39 U302-20 U330 20

Common U301-1 U302-10 U330-10

SPCLR

U301-6 = +5V U302-1 = +5V U330-1 = +5V

4 MHz U301-2,3

1 MHz U301-40

SD(7) U301-30 = H083 U302-14 = H083 U330-4 = H083

SD(6) U301-31 = IUUO U302-17 = 1UUO U330-17 = IUUO

SD(5) U301-32 = 8A16 U302-13 = 8A16 U330-13 = 8A16

SD(4) U301-33 = 834A U302-8= 834A U330-7 = 834A

SD(3) U301-34 = P070 U302-18= P070 U330-3 = P070

SD(2) U301-35 = U93A U302-3= U94A U330-18 = U93A

SD(1) U301-36 = AP48 U302-4= AP48 U330-14 = AP48

SD(0) U301-37 = UFOA U302-7= UFOA U330-8 = UFOA

U301-8 = +5V U302-5= 6A19 U330-9 = 6AH2

U301-10 = H82C U302-6 = P921 U330-15 = 1ACH

U301-11 = +5V U302-2= A9H8 U330-19 = 46AH

U301-12 = 0000 U302-9 = C1H7 U330-11 = H82C pulsing

U301-13 = 24A7 U302-11 = 9457 U330-2 = H82C pulsing

U301-14 = A264 U302-16 = 3505 U330-16 = U746

U301-15 = OUPA U302-15 = H210 U330-12 = HH1A

U301-16 = HHC8 U302-12 = 0CH8 U330-5 = 64PC

U301-17 = 41UA U302-19 = AUH1 U330-6 = 746A

U301-18 = 9986

U301-19 = HCA7

U301-20 = 0620

U301-23 = 0000

U301-24 = 77UA

U301-25 = 0000

U301-26 = 927H

U301-27 = 15C4

U301-28 = 3PAF

U301-29 = 4234

U318-10 = 41AH

U318-8 = 9986

U318-12 = 64PC

U318-2,3,5,6,7,9,13 = 0000

U318-1,4,11,14 = H82C