NQE-3182 Marine AIS Equipment Connection Box

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

Informations de base

Modèle: 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.

Fonctions & Applications

1. Acts as an external interface transfer box for the JHS-182 AIS main unit, centrally routing antenna, alimentation, alarme, 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

Application & Notes d'entretien

1. Application: Ocean-going and large inland-water vessels, SOLAS-compliant AIS onboard equipment.
2. Typical Fault Symptoms: 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. Remplacement: 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 (Terminal Board). Most faults occur on these two boards and terminal blocks.

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

Couverture: NQE-3182 dimension drawing, system interconnection schematic, terminal definition, dépannage, 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, alimentation, NCM-779 controller and NTE-182 transceiver.

2. JHS-182 Installation Manual

Mechanical dimensions of NQE-3182, cable specification, shielding & mise à la terre, cabin installation requirements, waterproof sealing and terminal crimping standards.

3. JHS-182 Instruction Manual

Section 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

Remarque 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. Entrée de mesure & 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. Inspection visuelle: 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. Limites
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.

Pré-requis

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

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

Étape 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.

Étape 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.

Étape 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 (mise hors tension)

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.

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

Étape 4: Checklist for Typical Fault Troubleshooting

Faute 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.

Faute 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.

Faute 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.