HP 1652B Getting Started Manual page 690

5 CHART 7
?
CHART 5
PERFORM
KEYBY;;: SELF
CHECK SIGNAL
INPUT TO
KEYBOARD
( TABLE 6C-3)
NO
YES REPLACE SYSTEM
CONTINUITY
BOARD ASSEMBLY
+
YES
NO
YES (ENTIRE ROW NOT WORKING)
REPLACE
+ KEYBOARD ASSEMBLY
1 YES
I I /
REPLACE RPG
ASSEMBLY
01652B14
Figure SC-S. Trouble Isolation for Keyboard
Troubleshooting
SC-6
HP 16528/l 6538
Service Manual