S 865-155

 (3)  
Supply electrical power (AMM 24-22-00/201).

 (a)  
Make sure these switches on the P-5 overhead panel are in the positions shown in the table that follows:

 ~.................................... | Switch | Position | ...................................... | STBY POWER | AUTO | ...................................... | BATTERY | ON | ...................................... | BTB (4) | AUTO | ...................................... | EXT. PWR | ON | 2................…...................1
 S 865-162
 (4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7 Overhead Circuit Breaker Panel
 1) 7F22 LANDING GEAR DSP & CONT PRI
 2) 7F23 LANDING GEAR DSP & CONT ALTN
 3) 7F25 PSEU SECT 1
 4) 7F26 PSEU SECT 2

 F.
Procedure (Fig. 501)

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Connectors for the PSEU on the E1 Shelf
Figure 501

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 S 765-166
 (1)  Make sure there is 1 ohm or less between the pins of the connector on the E1 shelf, as shown below:
 ~................................................................. |CONNECTOR | PIN | PIN | ................................................................... |DM 7838 CA | C11 | D11 | ................................................................... |DM 7838 FA | G11 | H11 | 2..........................….......................…..............1
 S 765-171
 (2)  Make sure there is 18 to 32 volts on the pins of the connector on the E1 shelf, as shown below (Fig. 501):
 ~................................................................. | CONNECTOR | PIN (18 to 32 Volts) | PIN (0 Volts) | ................................................................... |DM 7838 CA | A01 | A03 | ................................................................... |DM 7838 CA | A13 | A15 | ................................................................... |DM 7838 FA | K01 | K15 | ................................................................... |DM 7838 FA | K13 | K15 | 2.....................…..........................…................1
 S 865-172
 (3)  
Open the 7F23 LANDING GEAR DSP & CONT ALTN circuit breaker on the P7 Panel and install a DO-NOT-CLOSE tag.

 S 765-173

 (4)  
Make sure that 28 volts dc is not found at the connector DM7838 FA, pin K1, on the E1 shelf.

 S 865-175

 (5)  
Open the 7F22 LANDING GEAR DSP & CONT PRI circuit breaker on the P7 Panel and install a DO-NOT-CLOSE tag.

 S 765-176

 (6)  
Make sure that 28 volts dc is not found at the connector DM7838 CA, pin A1, on the E1 shelf.

 S 865-178

 (7)  
Open the 7F25 PSEU SECT 1 circuit breaker on the P7 Panel and install a DO-NOT-CLOSE tag.

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MAINTENANCE MANUAL

 S 765-179
 (8)  
Make sure that 28 volts dc is not found at the connector DM7838 FA, pin K13, on the E1 shelf.

 S 865-181

 (9)  
Open the 7F26 PSEU SECT 2 circuit breaker on the P7 Panel and install a DO-NOT-CLOSE tag.
　
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