Motorola i897 - DC Distribution (V3) Test

TROUBLESHOOTING: DC Distribution (V3) Test
3.16 DC Distribution (V3) Test
Check C719, E601 and
R661
for 1.875 Vdc.
Go to
FILT_B+
flowchart.
Is
1.875 Vdc
at the parts?
Check FILT_B+
(3.6Vdc) at
R707, C900 &
C901
Is
3.6 Vdc
present
?
No
Yes
Yes
No
Check for US, DFP, etc.
Repair, as necessary.
Replace U701
ROADRUNNER
Use this test on a unit with the following symptom: no V3 (1.875 Vdc).
98
6880401P59-O