IBM 5110 Series Maintenance Analysis Procedures page 219
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Also See for 5110 Series:
- Maintenance information manual (277 pages) ,
- Basic reference manual (255 pages) ,
- User manual (174 pages)
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C D F
1 1 2
Automatic Answer MAP
World Trade 38LS
PAGE 3 OF 5
011
Probe C2G03 (Transfer Relay).
Is the signal on?
Y N
012
Bad C2 (38LS) card.
013
Bad line box assembly P / N 4836775
014
- Check for the presence of the 2100 Hz
between C2D08 and C2D05.
Is 2100 Hz present during 3.5 seconds?
Y N
015
Bad C2 (38LS) card.
016
Bad line box assembly P / N 4836775
017
Does the answering tone stop after 3.5
seconds?
Y N
018
Bad C2 (38LS) card.
019
Auto-answer function is OK.
Check other
functions as appropriate.
Remove the jumper from C2B02 to C2D08.
C2G03 signal levels:
On: -2.7V
Off: -4.5V
MAP 0836-3
The 38LS should raise Transfer Relay when
Current Detection 1 and Current Detection 2 rise
(together three times), and when the 5110 is in
data mode.
Use an intercom or a dbmeter.
The 38LS should send a 2100 Hz tone during
3.5s, when answering a call automatically.
01JAN79
EC 836600
PEC -------
MAP 0836-3
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