IBM 5110 Series Maintenance Analysis Procedures page 228

B C
1 1
009
Manual Answer MAP for
World Trade 38LS
PAGE 2 OF 5
Bad C2 (38lS) card.
010
- Answer the call.
Is the conversation OK?
V N
011
Ask the customer to call the PTT
representative.
012
- Keep the handset off hook.
- Connect a jumper from C2B02 (-Data Terminal
Ready) to C2D08.
Is the associated telephone set disconnected
from the line?
V N
013
- Probe C2G 10 (Current Detection 1) and
C2G13 (Current Detection 2).
Is one of these signals on?
V N
014
Go to Page 5, Step 030, Entry Point B.
015
- Probe C2G03 (Transfer Relay).
Is the signal on?
V N
3 3
o
E
016
Bad C2 (38lS) card.
MAP 0838-2
Transfer Relay should be off when the 5110 is
not in data mode.
No more tone; silent handset.
C2G 10 and C2G 13 signal levels:
On: -3V
Off: +1V
C2G03 signal levels:
On: -2.7V
Off: -4.5V
Transfer Relay should be on when the 5110 is in
data mode and the handset lifted.
01JAN79
EC 836600 PEC -------
MAP 0838-2