HP 3562A Service Manual page 547

MO D E L 3562A
e . Arbiter
• Set up eq u i pment as d i rected in section 3 . a. above.
• Verify that the outputs of U508 (pins 1 2 through 1 8) are a l l h igh U 5 d isables
U 508).
• Check the clock s ignals for U 506 and U507. The correct waveforms are shown
i n table A8-9 #6.
• Check the s ignatu res in table A8-8:
Table A8-8 Global RAM Signature Analysis Test #2
Signal
l e
(Pin)
N ame
I D L E U509(2)
MG B2D2L (3)
MGFPP (4)
(5)
MG68L
M G D F1 (6)
(7)
MG DF2 L
(8)
MG FFT
MGRFS H L (9)
MG RFSH (1 1 )
M G FFTL (1 2)
M G D F2 (1 3)
MGDF1 L (14)
I MG68L (1 5)
MGFPPL (16)
(1 7)
MG B2D2
(1 8)
I D L E L
Priority
Decoder
outputs :
Y A U506(1 9)
(18)
Y B
(1 7)
YC
(16)
YD
YE (1 5)
YF (14)
YG (1 3)
YH (1 2)
Signature
6493
7820
CPA9
31 H6
9502
OCC1
96PF
20A7
20A7
96PF
OCC1
9502
31 H6
C PA9
7820
6493
2 H H8
2 P36
C085
9C93
F31 4
059H
8AP2
H UA7
S E RV I C E
8-97