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3803 CONVERSION TIPS FROM DATA BANK
(continued)
3803 Modell to Model 2 pre-conversion checklist PIN 902-106 page 2/5 checkpoint infor-
mation.
The checklists have to be implemented by physically checking the machine, not by checking
machine histories.
Complementary checkpoint information is listed here under:
1.
EC 733838: Include the following checkpoint to ECA 39 as an "AND" condition.
Check resistor A2M2D08 to A2M2D13 and resistor B2E2M11 to B2E2P08.
2.
EC 734821: Include the following checkpoint to ECA 42 as an "OR" condition:
Power-on reset card PIN 375382 at EC level 136587 or REA 24-24075
3.
Delete EC 733834 ECA 42. It is picked up by EC 733843 ECA 46.
4.
EC 734289B ECA 64. This prereq EC is needed only when the -4 volts reg asm PIN
2521578 has regulator board with slotted holes for mounting capacitors C1, C2, and
C4.
B2M2 PIN incorrect per EC 734874 checklist for conversion to 6250 bpi. Current plug chart
in 3803 Volume 1 may reflect B2M2 to be PIN 8218309 at EC 733816, and PIN 8218365
at EC 733814. Your machine may contain PIN 8218307. B2M2 is PIN 8218307 at EC
733816A (ECA 015), and PIN 8218309 at EC 733816 (ECA 018).
Installation of EC 734873, which is prerequisite for 3803 Modell to Model 2 conversion
may cause D-bus parity checks or microprogram hangup during power-on reset. This prob-
lem is corrected by EC 733838 ECA 039 which must be installed concurrently with EC
734873.
AAA - 3803 Modell to Model 2 conversion errors in rework instruction:
1.
Page 0400 (XE200) salmon color at EC 734116 and REA 24-26625/24-26629. The
deleted net FC261 GL2 between K5B03 and G5-B09 is not a printed circuit. It is a
yellow wire - this error
will be corrected at EC 734877
2.
Page 410 - board 01AB2 rework - net FC021GA4. Add must be read Q3D06 to
P3D06 - Ensure this add is made.
171
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