Tait T800 SL2 25W, Service Manual

Page: 353 / 383

M8SL2-00-002-812
T854 Optional Features G2.3
© Copyright Tait Electronics Limited August 2004. All rights reserved.
The line transformer is designed to provide a balanced interface to 600
Ω
lines, con-
nected between LINE I/P 1 and LINE I/P 4. When %T210 is fitted, the two centre con-
nections (LINE I/P 2 and LINE I/P 3) are shorted together for normal operation. With
the other options these two centre connections are available to the user via P204 and
P208, unless a centre-tapped %T210A or %T210B is used, wired to LINE I/P 3.
The secondary winding of the transformer is connected via 1k
Ω
(R202) and 10
Ω
(R160)
resistors to pin 6 (AUDIO-2) of D-range 1 and may be used to monitor audio on the line.
Pin 7 of D-range 1 can be reconfigured as AUDIO-1 by removing R808 and R160, and
placing %R150. Note that this configuration does not allow external programming of
the module
%R203C and %R203D have replaced SL201 and SL202.
To retain the DC loop keying keying facility, there is a centre-tapped version of the
ETAL leaded and SMD transformers, the P2602 and P2782 respectively. This will only
work for Common Earth systems. If full isolated DC loop keying is required, then the
T4030 must still be used. The T4030 must also be used if the Transmitter is to be used as
half of a 2-wire to 4-wire hybrid.
Transformer T4030 P1200 P2781 No
Transformer
IPN 053-00010-17 054-00010-16 054-00010-18
Designator %T210 %T210A %T210B
%R200 Not Fitted Not Fitted Not Fitted Not Fitted
%R200A Not Fitted Not Fitted Not Fitted 0
Ω
%R203 Not Fitted Not Fitted Not Fitted Not Fitted
%R203A Not Fitted Not Fitted Not Fitted 0
Ω
%R203B Not Fitted 0
Ω
0
Ω
Not Fitted
%R203C 0
Ω
Not Fitted Not Fitted Not Fitted
%R203D 0
Ω
Not Fitted Not Fitted Not Fitted
%R203E Not Fitted 560
Ω
560
Ω
560
Ω
%R201 560
Ω
Not Fitted Not Fitted Not Fitted
C201 4U7 BP 4U7 BP 4U7 BP Not Fitted
C202 4U7 BP 4U7 BP 4U7 BP Not Fitted
%C204 4U7 BP Not Fitted Not Fitted Not Fitted
%C205 4U7 BP Not Fitted Not Fitted Not Fitted
%C203A Not Fitted 15nF 15nF Not Fitted
%C203B Not Fitted 15nF 15nF Not Fitted