Model 4700 Maintenance Manual

Section 8.Theory of Operation

All Dual Traction Motor Trucks and Single Traction Motor Trucks <S/N10677Pinout Matrix

351J138-1 GND B– supply from Battery. This B– is used by the optional Fingertip Armrest Board. If not present, follow back towards B– until loss can be determined.

352J138-2 CAN L Communication line between PPA and optional Fingertip Armrest Board (JCAN-2).

353J138-3 GND B– supply from Battery. This B– is used by the optional Fingertip Armrest Board. If not present, follow back towards B– until loss can be determined.

354J138-4 CAN H Communication line between PPA and optional Fingertip Armrest Board (JCAN-4).

355J138-5 +24V CAN+24V supply to Fingertip Armrest Board (JCAN-5) from VM (J34-12). If not present, check fuse F23, wiring, and connections.

356J138-6 and 7NOT USED

357J140-1 B+

358J140-2 B+

359J140-3 B–

B+ to HCB. If voltage is not present, check fuse F3, wiring, and connections.

B+ to HCB. If voltage is not present, check fuse F3, wiring, and connections.

Battery voltage wrt BT1+

N/A VMHCB

361J140-5 thru 12NOT USED

363J140-14NOT USED

364J406-A NOT USED

Publication 1160093, Issued: 20 May 2013

N/A VMHCB

365J406-B +V POTVoltage to the Lifting/Lowering pot (P4). If not present, check the Armrest Board, wiring, and connections. Item Connection Function Description Theory of Operation Normal Level Signal Source Signal User

Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout MatrixAll Dual Traction Motor Trucks and Single Traction Motor Trucks <S/N10677

366J406-C C POT Output from the Lifting/Lowering pot (P4) wiper to the Armrest Board. If not present, check P4, wiring, and connections.

Note: Check P4 by disconnecting it from the circuit and reading across it. Approx. 4K ohms should be read across J400-1 and 4.

367J406-D GND POTGround to the Lifting/Lowering pot (P4). If not present, check the Armrest Board, wiring, and connections.

368J406-E MICROInput from Lifting/Lowering directional switch (SW17). If not present, check switch, wiring, and connections.

369J406-F MICROInput from Lifting/Lowering directional switch (SW18). If not present, check switch, wiring, and connections.

370J406-G GND Ground to Lifting/Lowering directional switches (SW17 and SW18). If not present, check the Armrest Board, wiring, and connections.

371J407-A NOT USED

372J407-B +V POTVoltage to the Tilt pot (P5). If not present, check the Armrest Board, wiring, and connections.

373J407-C C POT

Output from the Tilt pot (P5) wiper to the Armrest Board. If not present, check P5, wiring, and connections. Note: Check P5 by disconnecting it from the circuit and reading across it. Approx. 4K ohms should be read across J401-1 and 4.

374J407-D GND POTGround to the Tilt pot (P5). If not present, check the Armrest Board, wiring, and connections.

375J407-E MICROInput from Tilt pot directional switch (SW19). If not present, check switch, wiring, and connections.

376J407-F MICROInput from Tilt pot directional switch (SW20). If not present, check switch, wiring, and connections.

Approx. 2.5V in neutral; range 0V to 5V

Lifting/ Lowering Fingertip Module

Armrest Board

Battery voltage wrt BT1+ Armrest Board Lifting/ Lowering Fingertip Module

Approx. 5V closed; 0V open Lifting/ Lowering Fingertip Module

Approx. 5V closed; 0V open Lifting/ Lowering Fingertip Module

Armrest Board

Armrest Board

Battery voltage wrt BT1+ Armrest Board Lifting/ Lowering Fingertip Module

Approx. 5VArmrest Board Tilt Fingertip Module

Approx. 2.5V in neutral; range 0V to 5V

Tilt Fingertip Module

Armrest Board

Battery voltage wrt BT1+

Approx. 5V closed; 0V open

Approx. 5V closed; 0V open

Armrest Board Tilt Fingertip Module

Tilt Fingertip Module

Armrest Board

Armrest Board

Publication 1160093, Issued: 20 May 2013