Model 4700 Maintenance Manual

Single Traction Motor Trucks >S/N 10676

298J142-1 GND

Ground to the Horn switch (PB12) on the Armrest Board. If not present, check the switch, armrest board, wiring, and connections.

299J142-2 HORN Input from the Horn switch (PB12) to the Armrest Board when pushed. If not present, check the switch, wiring, and connections.

300J406-A NOT USED

301J406-B +V POTVoltage to the Lifting/Lowering pot (P4). If not present, check the Armrest Board, wiring, and connections.

302J406-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 JSOLL-1 and 4.

303J406-D GND POTGround to the Lifting/Lowering pot (P4). If not present, check the Armrest Board, wiring, and connections.

304J406-E MICROInput from Lifting/Lowering directional switch (SW17). If not present, check switch, wiring, and connections.

305J406-F MICROInput from Lifting/Lowering directional switch (SW18). If not present, check switch, wiring, and connections.

306J406-G GND Ground to Lifting/Lowering directional switches (SW17 and SW18). If not present, check the Armrest Board, wiring, and connections.

307J407-A NOT USED

308J407-B +V POTVoltage to the Tilt pot (P5). If not present, check the Armrest Board, wiring, and connections.

Section 8.Theory of Operation

Pinout Matrix

Approx. 5VArmrest Board PB12

Approx. 0V closed; 5V open

PB12Armrest Board

Approx. 5VArmrest Board Lifting/ Lowering Fingertip Module

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

Approx. 5V closed; 0V open

Lifting/ Lowering Fingertip Module

Lifting/ Lowering Fingertip Module

Armrest Board

Armrest Board

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

Approx. 5VArmrest Board Tilt Fingertip Module

Publication 1160093, Issued: 20 May 2013 8-73

Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout Matrix Single Traction Motor Trucks >S/N 10676

309J407-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 JBRA-1 and 4.

310J407-D GND POTGround to the Tilt pot (P5). If not present, check the Armrest Board, wiring, and connections.

311J407-E MICROInput from Tilt pot directional switch (SW19). If not present, check switch, wiring, and connections.

312J407-F MICROInput from Tilt pot directional switch (SW20). If not present, check switch, wiring, and connections.

313J407-G GND Ground to Tilt directional switches (SW19 and SW20). If not present, check the Armrest Board, wiring, and connections.

314J408-A NOT USED

315J408-B +V POTVoltage to the Sideshift pot (P6). If not present, check the Armrest Board, wiring, and connections. Note: This switch is internal to the Fingertip Module. If switch is bad, replace the module.

316J408-C C POT Output from the Sideshift pot (P6) wiper to the Armrest Board. If not present, check P6, wiring, and connections. Note: Check P6 by disconnecting it from the circuit and reading across it. Approx. 4K ohms should be read across JTRA-1 and 4.

317J408-D GND POTGround to the Sideshift pot (P6). If not present, check the Armrest Board, wiring, and connections.

318J408-E MICROInput from Sideshift pot directional switch (SW21). If not present, check switch, wiring, and connections.

319J408-F MICROInput from Sideshift pot directional switch (SW22). If not present, check switch, wiring, and connections.

320J408-G GND Ground to Sideshift directional switches (SW21 and SW22). If not present, check the Armrest Board, wiring, and connections.

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

Tilt Fingertip Module

Armrest Board

Battery voltage wrt BT1+ Armrest Board Tilt Fingertip Module

Approx. 5V closed; 0V open Tilt Fingertip Module

Approx. 5V closed; 0V open Tilt Fingertip Module

Armrest Board

Armrest Board

Battery voltage wrt BT1+ Armrest Board Tilt Fingertip Module

Approx. 5VArmrest Board Sideshift Fingertip Module

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

Sideshift Fingertip Module

Armrest Board

Battery voltage wrt BT1+

Approx. 5V closed; 0V open

Approx. 5V closed; 0V open

Battery voltage wrt BT1+

Armrest Board Sideshift Fingertip Module

Sid eshift Fingertip Module

Sideshift Fingertip Module

Armrest Board

Armrest Board

Armrest Board Sideshift Fingertip Module

Publication 1160093, Issued: 20 May 2013