N1236 and N2260:
Supply voltages are tested via the connector socket (refer to figure 66 and table
small test
probes are required. If necessary the various voltages may be accessed similarly to the N616.
*CAUTION*
The power supplies are powered from the 240 volt mains supply and hazardous
voltages are present within. Do not attempt to repair these units.
LGD
ERS
0 6
3
6
9
12
14
17
2 0
2 3
I
I
16
19
22
A G D
R G D
FIGURE 66 POWER SUPPLY VOLTAGES, CONNECTOR CONFIGURATION
(VIEWED FROM OUTSIDE THE POWER SUPPLY)
The following table lists the various voltages, the corresponding test points on the power supply
board (PSB-B) and the connector outputs on the power supply.
VOLT.
Cross point switch
ov
Station DSS console power
Logic
Handset battery feed
Amplifier power
Amplifier bias reference
Cross point bias reference
Relay
TABLE 16 POWER SUPPLY VOLTAG
SUPPLY VOLTAGE
TEST POINTS
DESCRIPTION
+ve
B3
A9
B12
B4
B13
B6
S
CONNECTOR PINS
+ve
PINS
PINS
120
ISSUE 2