Service manual

Replaces page 36 97
Table 3-11. Main DAC, Transient DAC, Data Bus Signature Analysis (Secondary)
Description
: These signatures check main DAC U320, transient DAC U321, and secondary data bus B latches U319.
The signatures are valid for U301 firmware revisions "Rev A.01.01" and Rev A.01.02". Use the test setup described in
"Test Setup for S.A.".
Signatures:
U319 U320 U321
U319-20 = 1CAU +5V U320-20 = +15V U321-20 = +15V
Common U319-10 U320-1,3,10,12,18 U321-1,3,10,12,18
SPCLR
U319-1 = 1CAU +5V
SD(0) U319-7 = lP45
SD(l) U319-13 = 2OOF
SD(2) U319-14 = 89AA
SD(3) U319-8 = 93AU
SD(4) U319-4 = 7792
SD(5) U319-3 = 0343
SD(6) U319-18 = FPOU
SD(7) U319-17 = 674O
SDB(0) U319-6 = 55U3 U320-7 = 55U3 U321-7 = 55U3
SDB(l) U319-12 = 43AA U320-6 = 43AA U321-6 = 43AA
SDB(2) U319-15 = F421 U320-5 = F421 U321-5 = F421
SD8(3) U319-9 = 9CP2 U320-4 = 9CP2 U321-4 = 9CP2
SDB(4) U319-5 = OOFH U320-16 = OOFH U321-16 = OOFH
SDB(5) U319-2 = O6OO U320-15 = O6OO U321-15 = O6OO
SDB(6) U319-19 = 3U83 U320-14 = 3U83 U321-14 = 3U83
SDB(7) U319-16 = OO1U U320-13 = OO1U U321-13 = OO1U
U319-11 = P8OC
U32-2 = 21PA U321-2 = 868H
U320-17 = 61F4 U321-17 = 61F4
U320-19 = 6F2F U321-19 = 1CAU +5V
U318-10 = 61F4
U318-8 = 7A6C
U318-12 = lUP5
U318-2,3,5,6,7,9,13 = OOOO
U318-1,4,11,14 = 1CAU