NQE-3182 Marine AIS Equipment Connection Box

Nota: NQE-3182 is manufactured by JRC (Japan Radio Co., Limitado.), not NEC. It is an accessory for marine-borne AIS equipment.

Información básica

Modelo: NQE-3182 Connection Box

OEM: JRC (Japan Radio Co.,Ltd)

Compatible Main Unit: JHS-182 Ship-borne AIS (Automatic Identification System) Transceiver NTE-182. Dedicated external interface junction box for this AIS system.

Funciones & Aplicaciones

1. Acts as an external interface transfer box for the JHS-182 AIS main unit, centrally routing antenna, fuente de alimentación, alarma, external sensor, bridge remote control and PILOT PLUG signals.
2. Realizes cable distribution, signal transfer and cable protection between the below-deck main unit, bridge equipment and mast-mounted antenna.
3. Component of GMDSS maritime communication system, deployed on merchant vessels and fishing vessels forNQE-3182 Marine AIS E AIS installation.

System Components of Complete JHS-182 Set

Solicitud & Notas de mantenimiento

1. Solicitud: Ocean-going and large inland-water vessels, SOLAS-compliant AIS onboard equipment.
2. Síntomas típicos de falla: No external alarm output, pilot plug signal loss, failure of external sensor communication. Prioritize inspection of terminals inside NQE-3182.
3. Second-hand Unit Inspection: Check terminal corrosion, ageing waterproof O-rings and oxidation of internal terminal blocks.
4. Reemplazo: No direct off-the-shelf domestic alternative. Only genuine JRC or used NQE-3182 units can be applied.

Maintenance Documentation for NQE-3182 (JRC JHS-182 AIS Junction Box)

There is no standalone service manual for NQE-3182. All relevant documentation is contained within JHS-182 Service Manual and Installation Manual.

Two core internal circuit boards: CDJ-3182 (I/O Control Board) and CQD-3182 (Tablero de terminales). Most faults occur on these two boards and terminal blocks.

1. Essential OEM PDF Manuals for Maintenance
2. JHS-182 Service Manual (Primary Reference)

Cobertura: NQE-3182 dimension drawing, system interconnection schematic, terminal definition, solución de problemas, spare-parts list, alarm table and disassembly procedures.

Chapter 1-6 is dedicated to NQE-3182; Chapter 2 contains complete wiring diagrams; Chapter 11 covers fault diagnosis; Chapter 10 lists spare-part inventory.

Contents: Full wiring for pilot plug, external alarms, gyro NMEA interface, fuente de alimentación, NCM-779 controller and NTE-182 transceiver.

2. JHS-182 Installation Manual

Mechanical dimensions of NQE-3182, cable specification, shielding & toma de tierra, cabin installation requirements, waterproof sealing and terminal crimping standards.

3. JHS-182 Instruction Manual

Sección 8-2: Interface specifications and environmental parameters of NQE-3182, for reference during field signal measurement.

Document Access: Preview available via ManualsLib. Full-version PDFs are mostly obtained from marine equipment service providers and maritime dealers. JRC does not release service manuals to the public; documents are only available for authorized service partners.

2. Internal Spare-part Part-numbers for NQE-3182 Repair

Nota importante: NQE-3182 functions purely as a signal transfer unit without any RF circuitry. All AIS radio-frequency hardware resides inside NTE-182 main unit.

3. Key Fault-diagnosis Items Extracted from OEM Service Manual

Common Faults Related to NQE-3182

1. Pilot Plug Communication Failure

Inspect CQD-3182 terminals and CDJ-3182 inside NQE-3182; verify cable shielding and earthing. Measure pin-to-pin signals against service-manual schematics.

2. No External Alarm Output / False Alarm Triggering

All alarm signals pass through NQE-3182. Perform continuity test on terminal-board relay circuits and inspect CDJ-3182.

3. Loss of Gyro / External NMEA Input, No Heading Data on AIS Unit

NMEA0183 signals are routed via NQE-3182. Entrada de medida & output terminals to isolate faults between gyro equipment and junction-box I/O hardware.

4. NCM-779 Controller Communication Loss / Black Screen while NTE-182 is Powered Normally

Power and communication signals for the controller run through NQE-3182. First measure DC24V input and output terminals inside the box.

Practical On-board Troubleshooting Sequence

1. Inspección visual: Check O-ring integrity, condensation or water intrusion, terminal-block corrosion and verdigris formation.
2. Continuity measurement under power-off condition: Measure each terminal against wiring diagrams. Wiggle harnesses to detect intermittent loose connections.
3. Fault isolation: Bypass NQE-3182 by direct wiring between NTE-182 and NCM-779, to confirm whether the fault originates in the junction box or main transceiver unit.
4. Board-level repair: CQD-3182 terminal board can be replaced independently. For CDJ-3182 failure, replace the complete board. Component-level SMD repair is not recommended on-board due to limited spare-part availability.
5. Search Keywords for Document Retrieval

Copy the strings below for PDF searching:

JHS-182 Service Manual NQE-3182

CDJ-3182 CQD-3182 JRC spare parts

-182 interconnection diagram NQE-3182

5. Limitaciones
6. No official Chinese-language service documentation; all OEM materials are in English.
7. Standalone manual for NQE-3182 does not exist. All reference information must be extracted from full JHS-182 service documentation.
8. This product is end-of-life from OEM. New original parts are scarce; maintenance relies heavily on used reclaimed boards.

Practical Workflow for Rapid NQE-3182 Fault Localization

Core Concept: NQE-3182 is a passive signal junction box without RF hardware. It consists of two circuit boards: CQD-3182 (external terminal board) and CDJ-3182 (I/O processing board).

Three major fault categories: external cable failure, CQD-3182 terminal-board damage, CDJ-3182 I/O board damage.

Maintenance Principle: Isolate faults between external field wiring and internal box hardware before disassembling circuit boards.

Pre-requisites

Herramientas: Multímetro (continuity mode, DC voltage mode for 24 VDC); JHS-182 system interconnection drawing.

Seguridad: Disconnect 24 VDC power supply for the complete AIS system before any inspection to avoid short-circuit board burnout.

Paso 1: Fault-phenomenon Classification for Quick Scope Reduction (1 min)

Critical Rule: If NTE-182 main unit operates normally (indicator lamps healthy, AIS transmit-receive function valid), the fault must lie within NQE-3182 or external cabling — not inside the AIS transceiver.

Paso 2: Isolation Test — Distinguish External-cable vs Internal Box Fault (Most Important Procedure)

Since NQE-3182 is an intermediate junction unit, it can be bypassed for validation testing.

1. Disconnect all cable connectors on both sides of NQE-3182.
2. Following system interconnection drawings, directly connect NTE-182 to NCM-779, pilot-plug assembly and NMEA gyro source, completely bypassing NQE-3182.
3. Apply power and perform functional test:

✅ Fault disappears → Defect is located inside NQE-3182 (CQD-3182 or CDJ-3182)

❌ Fault persists → Root-cause lies in external cables or remote field devices; NQE-3182 itself is intact.

This is the most efficient field method on-board to avoid unnecessary disassembly of the junction box.

Paso 3: Internal Fault Localization inside NQE-3182 (Only after internal fault is confirmed)

Open enclosure and perform visual inspection first (no multimeter required).

1. Visual check for CQD-3182 terminal board

Inspect terminal blocks for verdigris oxidation, water-ingress traces, burn marks, loose screws and stray wire strands causing short-circuit.

80 % of field failures originate here: salt-laden cabin condensation leads to terminal corrosion and intermittent contact.

Symptom hint: Intermittent failure triggered by cable movement strongly indicates terminal-board damage.

2. Multimeter measurement for CQD-3182 (apagado)

Use continuity range to measure corresponding input-to-output terminals:

– Open-circuit between matched input-output terminals: CQD-3182 damaged by corroded copper traces.

– Unexpected continuity between unrelated signal channels: Leakage caused by water-induced corrosion.

If valid signal is present at CQD-3182 input side but absent on corresponding output, confirm terminal-board failure.

3. CDJ-3182 (I/O control board) fault judgement

CDJ-3182 handles pilot-plug signals, external-alarm relay circuits and selected NMEA channels.

CDJ-3182 is likely defective if any condition below applies:

1. Valid voltage signal arrives at CQD-3182 input, but no corresponding output after CDJ-3182 processing.
2. Zero external-alarm output with intact terminal board.
3. Complete pilot-plug signal loss with healthy terminal block.
4. Visible component burn marks or bulging capacitors on PCB.

Nota: CDJ-3182 uses surface-mount components. Component-level repair is discouraged on-board; replace complete assembly.

Paso 4: Checklist for Typical Fault Troubleshooting

Falla 1: Pilot-Plug Non-functional

1. Disconnect external pilot-plug assembly; take measurements directly at NQE-3182 terminals.
2. Valid signal measured at box terminals → Fault in external cable or NQE-3150 pilot-plug box.
3. No signal at box terminals → Suspect CQD-3182 first, then CDJ-3182.

Falla 2: Missing NMEA Gyro HDT Heading Data in AIS

1. Measure NMEA signal at NQE-3182 input terminals.
2. NMEA signal present at input but missing at output → CQD-3182 or CDJ-3182 fault.
3. No NMEA signal detected at input → Defect in gyro compass or gyro cabling; junction box is not at fault.

Falla 3: NCM-779 Black Screen while NTE-182 Main Unit Operates

1. Measure 24 VDC output terminals of NQE-3182.
2. Normal 24 VDC input, zero output: Corroded open-circuit on CQD-3182 main power terminals.
3. No 24 VDC measured at input terminals: Fault in NBD-577C power-supply unit.

Fault-judgement Quick Reference Table

Critical Maintenance Notes

1. The dominant failure mode at sea: Condensation and salt-air intrusion into enclosure corrode terminal boards. Always replace enclosure O-ring after repair, otherwise failure will re-occur quickly.
2. CDJ-3182 and CQD-3182 can be replaced individually; full NQE-3182 housing replacement is unnecessary.
3. Never hot-swap internal board connectors under power; CDJ-3182 can be easily burnt.
4. This equipment is OEM end-of-life; maintenance depends on used reclaimed spare-part boards.