Service manual

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Table 3-7. Trigger Circuit Signature Analysis (Primary) continued
U228 - connect CLOCK = TP201-16 (CS7)
U228-1 = UFP6 +5V U228-11 = OOOO Pulsing LO
U228-2 = 5505 U228-12 = OOO8
U228-3 = AAOC U228-13 = OO10
U228-4 = 6679 U228-14 = OOO8
U228-5 = 333F U228-15 = OOO4
U228-6 = OU39 U228-16 = OOO2
U228-7 = lP72 U228-17 = OOO4
U228-8 = OO20 U228-18 = OOO2
U228-9 = OO10 U228-19 = OOO1
U228-10 = OOOO com U228-20 = UFP6 +5V
Table 3-8. Module Interface Signature Analysis (Primary)
Description
: These signatures check the module communications, U229 data transmission to modules, U230 data
transmission from modules, and U239, which indicates the number of modules installed. Connect the signature
analyzer's clock input to the IC under test as specified below.
U229, 230 - connect CLOCK to U207-9 (E clock)
U229-1 = 7H51 U230-1 = 437U
U229-2 = 284O U230-2 = 437U
U229-3 = 3O9C U230-3 = 437U
U229-4 = unstable U230-4 = 437U
U229-5 = U123 U230-5 = 684C
U229-6 = 437U + 5V U230-6 = 2C34
U229-7 = 437U +5V U230-7 = U123
U229-8 = OOOO com U230-8 = OOOO com
U229-9 = unstable U230-9 = 309C
U229-10 = unstable U230-10= 284O
U229-11 = unstable U230-11 = 7H51
U229-12 = unstable U230-12 = OOOO
U229-13 = unstable U230-13 = 437U
U229-14 = unstable U230-14 = 437U
U229-15 = unstable U230-15 = 437U
U229-16 = 437U +5V U230-16 =1HC4 +5V
U239 - connect CLOCK to CS9 (U235-13)
Chip Select U239-1,19 = OOOO Pulse LO
Slot 1 U239-2,18 = O1UF short J2-6 to J2-8 = OOOO
Slot 2 U239-4,16 = O1UF short J2-5 to J2-8 = OOOO
Slot 3 U239-6,14 = O1UF short J2-4 to J2-8 = OOOO
Slot 4 U239-8,12 = O1UF short J2-3 to J2-8 = OOOO
Slot 5 U239-11,9 = O1UF short J2-2 to l2-8 = OOOO
Slot 6 U239-13,7 = O1UF short J2-1 to J2-8 = OOOO
Slot 7 U239-15,5 = O1UF short J208-4 to J2-8= OOOO
CAL_LOCK U239-17,3 = O1UF short TP201-5 to TP201-4 = OOOO
Table 3-9. Fan Speed Control Signature Analysis (Primary)