
20.2.1 SWITCH SETTINGS
Refer to Figure
Command and Control Communication
The command and control communication to the Consoles takes place on a digital
Switch | Open Sections | Close Sections |
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S1 | 1 | 2 | - | 4 | - | - | 3 | - |
S3 | 1 | 2 | - | - | - | - | 3 | 4 |
S4 | - | - | 3 | 4 | 1 | 2 | - | - |
S5 | - | - | - | - | 1 | 2 | 3 | 4 |
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20.2.3MCM BACKPLANE EXTERNAL CON- TACTS
See the Backplane Section 23 for pinouts on the shelf backplane and wire harness pinouts.
TableBackplane | Description | Wire Harness | ||
P34 to P45 | J1,3,5,7 | |||
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pin 27 | Sec Rx + | pin 1 | Signal | |
pin 28 | Sec Rx - | pin 2 | Ground | |
pin 29 | EA lead | pin 3 |
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pin 30 | EB lead | pin 4 |
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pin 31 | Pri Rx Audio+ | pin 5 | RX+ | |
pin 32 | Pri Rx Audio- | pin 6 | RX- | |
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| J2,4,6,8 | ||
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pin 59 | Sec Tx + | Signal | pin 1 | |
pin 60 | Sec Tx - | Ground | pin 2 | |
pin 61 | MA lead | Unsel Tx+ | pin 3 | |
pin 62 | MB lead | Unsel Tx- | pin 4 | |
pin 63 | Pri Tx Audio+ | Select Tx+ | pin 5 | |
pin 64 | Pri Tx Audio- | Select Tx- | pin 6 |
20.2.2 MCM JUMPER PLACEMENT
TableJU | Pin | Description |
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J24 | 1 to 2* | Selects 27512 EPROM operation |
| 2 to 3 | Selects 27256 EPROM operation |
J27 | 1 to 2 | Not used |
| 2 to 3* | Normal audio |
P33 | 1 to 2* | No personality card attached |
| 3 to 4* | No personality card attached |
| 5 | open |
| 6 | open |
J36 | 1 only* | Not used |
| 1 to 2 | |
| 2 to 3 | |
J14 | Jumper pin 1 to 2 for high impedance ground path | |
J15 | for split 600 ohm inputs and outputs. Leave open if | |
J21 | no ground path desired. | |
J22 |
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*Setting for Normal operation.
20.3.1
The MCM is
1.Main Rx Audio Level From J1.
a.Setup for alignment, input 1004 Hz tone at
b.Set S5 for Test 1 (open section 1, close 2, 3 and 4).
c.Reset the module, Press S2 and release.
d.Adjust R41 to
e.Verify that the level at TP5 is
±1 dB.
6.Main Tx Audio Output Level From J1.
a.Setup for alignment as in Step 1.
b.Adjust R83 for a
c.Adjust R44 for a