Terasaki EMW-1101A CPU RAM & ROM Module PCB

Product Information

Manufacturer	TERASAKI (Terasaki Electric Co., Ltd.)
Model / Module Name	EMW-1101A
Module Type (printed on PCB)	CPU RAM & ROM MODULE
Part Number (K-number)	Not clearly visible in the supplied photograph (market listings show K/834/5-001B / -001C / -001D – not verified for this card)
EPROM Labels	GA-A A128, GA-A A127, GA-A A128 (possibly A126 – handwriting unclear), GA-A A125, GA-A A124, sixth label partly hidden
Other Number on PCB	95071
Serial Number	Not clearly visible in the supplied photograph
Country of Manufacture	Not clearly visible in the supplied photograph (Terasaki is a Japanese manufacturer)
Condition	New
Supplier	SM MARINE SERVICE™, Chattogram, Bangladesh

Product Introduction

The Terasaki EMW-1101A CPU RAM & ROM Module is the processor card of Terasaki EMW-series marine control electronics. It holds the CPU, a set of six program EPROMs labelled GA-A, RAM memory, a crystal oscillator and support logic. SM MARINE SERVICE™ supplies this module as a refurbished replacement for ship owners, ship managers and marine electricians worldwide. Visit https://www.smmarineservice.com/ for more marine automation and navigation spare parts.

What Is This Equipment?

EMW-1101A is a plug-in PCB card with two gold-plated edge connectors that slide into the back-plane of a Terasaki control rack. As the name printed on the board says, it is the CPU, RAM and ROM module: the CPU runs the control program stored in the EPROMs, and the RAM keeps working data. Other EMW cards in the same rack handle inputs/outputs and interfaces.

The exact Terasaki system name (for example a generator control or power management system) was not verified from manufacturer documentation. Terasaki EMW-series cards are commonly found in shipboard switchboard and generator control panels.

Main Features

• Genuine Terasaki EMW-1101A CPU RAM & ROM module
• Six socketed program EPROMs with GA-A software labels
• Large CPU IC in socket, RAM and support logic
• Crystal oscillator for system clock
• Two gold-plated edge connectors for back-plane mounting
• On-board electrolytic capacitors, relay and terminal points for service
• White card ejector levers for easy removal

Terasaki EMW-1101A CPU RAM & ROM Module PCB – SM MARINE SERVICE™

Main Technical Specifications

Model	EMW-1101A
Function	CPU, RAM & ROM (program memory) module
Part Number	K/834/5-001 series (B/C/D revisions seen in market) – not verified for this card
Program Memory	6 × socketed EPROMs, labels GA-A
Mounting	Plug-in rack card, two edge connectors, ejector levers
Supply Voltage	Not verified (supplied from the system back-plane)
Dimensions / Weight	Not verified

Inside the Unit: PCBs, Modules & Part Numbers

The following items were read from the supplied photograph:

EMW-1101A – CPU RAM & ROM Module

The main card itself – processor, program memory and working memory of the control system.

GA-A A124 / A125 / A127 / A128 – Program EPROMs

Six socketed EPROMs with handwritten GA-A labels. They hold the control software. When ordering, send photos of all six labels so the software set can be matched.

CPU, RAM and Crystal Oscillator

The large 40-pin socketed IC (CPU), memory ICs and the metal-can crystal oscillator. Exact IC part numbers are not clearly visible in the supplied photograph.

PCB marking 95071

Number printed on the PCB edge; its meaning is not verified.

Main Components & Related Units

Other Terasaki EMW-series modules seen in the spare-parts market (from market listings – not verified against Terasaki documentation and not confirmed to be from the same rack):

• Terasaki EMW-1201A – module
• Terasaki EMW-1202 – PCB card K/821/2-001D
• Terasaki EMW-1301 – TMA & TM Interface Module K/821/3-001B
• Terasaki EMW-1301C – PCB card
• Terasaki EMW-1401A – Parallel I/O Module K/821/4-001D

Marine & Industrial Applications

• Terasaki shipboard control panels using EMW-series cards
• Main switchboard, generator control and power management panels
• Offshore vessels and industrial plants using Terasaki control electronics
• Spare CPU card for onboard stock and emergency replacement

Close-up of the GA-A program EPROMs on Terasaki EMW-1101A – SM MARINE SERVICE™

Common Problems & Troubleshooting

• System does not start / CPU failure indication: check back-plane supply voltages and card seating before replacing the module.
• Random resets or lock-ups: check the crystal oscillator area, electrolytic capacitors and solder joints; clean edge connectors.
• Program errors: ageing EPROMs can lose data; verify all six EPROMs are seated and carry the correct GA-A labels.
• Lost settings after power-off: check memory back-up components (if fitted) on the board.
• Corrosion: inspect for moisture damage, especially around connectors.

Safety notes: isolate the panel before removing or inserting cards, use ESD protection, follow the permit-to-work system and the Terasaki manual. Changing a CPU card on a running power plant can cause blackout – plan the work with the Chief Engineer. Only qualified personnel should work on switchboard equipment.

Maintenance Tips

• Keep the control rack clean, dry and ventilated.
• Inspect and clean edge connectors during planned maintenance.
• Store spare cards in anti-static bags.
• Record the K-number and EPROM labels of the fitted card for quick ordering.
• Keep a tested spare CPU card onboard for critical systems.

Spare Parts & Replacement Availability

SM MARINE SERVICE™ supplies Terasaki EMW-1101A and other Terasaki PCB cards in refurbished, used and new condition, subject to confirmation. For a fast quotation please send:

• Module name and K-number (e.g. EMW-1101A, K/834/5-001D)
• Photos of both sides of your card and all EPROM labels
• Vessel or system name and quantity
• Delivery port or country

We ship worldwide by DHL, FedEx, UPS and other couriers, and can deliver to ships through agents in major ports.

Why This Equipment Is Still Used

Many vessels still operate Terasaki control panels with EMW-series cards. Replacing the complete panel is costly and needs class approval, so owners replace only the failed card. A reliable supply of CPU modules such as EMW-1101A keeps these systems running safely at low cost.

Frequently Asked Questions (FAQ)

Q1. What is Terasaki EMW-1101A?
EMW-1101A is the CPU RAM & ROM Module of Terasaki marine control equipment. It carries the processor, program EPROMs and working memory of the control system.

Q2. What is the part number of EMW-1101A?
Market listings show part number K/834/5-001 with revisions B, C and D (most common K/834/5-001D). The K-number is not clearly visible in our photograph, so please check the label on your card.

Q3. Are the revisions K/834/5-001B, -001C and -001D interchangeable?
Not verified. Send us photos of your card and we will check before supply.

Q4. What do the GA-A labels on the EPROMs mean?
They are software labels on the program EPROMs (GA-A A124, A125, A127, A128 visible). The software set should match your system.

Q5. Can I move my old EPROMs to the replacement card?
Often the EPROM set is matched to the vessel installation. Consult the system manual or a qualified technician before changing EPROMs.

Q6. Which other Terasaki EMW modules can you supply?
We source EMW-1201A, EMW-1202 (K/821/2-001D), EMW-1301 TMA/TM I/F module (K/821/3-001B), EMW-1301C and EMW-1401A parallel I/O module (K/821/4-001D), subject to availability.

Q7. Is the card tested?
Refurbished cards are inspected and cleaned before supply. Testing details are confirmed with each quotation.

Q8. Can you repair my faulty EMW-1101A?
Send photos and a fault description; we will advise on repair or replacement.

Q9. Do you ship worldwide?
Yes, SM MARINE SERVICE™ ships worldwide from Bangladesh and China stock locations.

Q10. How do I get a price?
Send the module name, K-number, EPROM labels and quantity to info@smmarineservice.com or WhatsApp +88 01818 929292.

Short Product Description

Terasaki EMW-1101A is the CPU RAM & ROM Module of Terasaki EMW-series marine control electronics. The plug-in card carries the CPU, six socketed program EPROMs with GA-A software labels, RAM memory, crystal oscillator and support logic, and connects to the control rack through two gold-plated edge connectors. Market listings show the part number K/834/5-001 with B, C and D revisions. SM MARINE SERVICE™ supplies this module in refurbished condition as a replacement spare for ships, offshore units and industrial plants worldwide. Send your K-number and EPROM labels for a fast quotation and worldwide delivery.

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SM MARINE SERVICE™ – Marine Automation & Navigation Equipment Supplier

Available Equipment Conditions: New • Used • Refurbished • Reconditioned (Specific product condition and availability are subject to confirmation.)

Stock Locations: Bangladesh • China

Services: Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing

Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh

Mobile / WhatsApp / Viber: +88 01818 929292

Email: info@smmarineservice.com

Website: https://www.smmarineservice.com/

Need a Terasaki EMW-1101A or any other Terasaki PCB? Contact SM MARINE SERVICE™ today for a quick quotation.

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