Yokogawa CMZ-900 Gyrocompass PCB
YOKOGAWA DENSHIKIKI CO., LTD.
Refurbished
The Yokogawa / YDK CMZ-900 Gyrocompass remains an important marine heading-reference system installed on commercial vessels worldwide.
This technical product page from SM MARINE SERVICE™ is specifically focused on the internal PCB/PWB assemblies, power supply boards, PWM/inverter boards, terminal boards, interface boards, changeover boards, distribution electronics and other replaceable CMZ-900 components.
The purpose of this page is different from a general CMZ-900 gyrocompass overview. A vessel engineer or purchasing department may already know that the complete gyro is operational but require only one defective PCB. In that situation, the number printed on the board can become the most important identification reference.
Examples include:
V8123WB – M.Main Board Assembly
V8123WE – M.PWM Board Assembly
V8123WH – M.PS Board Assembly
V8123WK – M.Terminal Board Assembly
V8123VR – Dual PS Board Assembly
V8123VT – Changeover Board Assembly
SM MARINE SERVICE™ supports worldwide sourcing of complete CMZ-900 equipment as well as individual electronic and mechanical spare parts subject to identification and availability.
The CMZ-900 family includes different vessel configurations such as CMZ900B, CMZ900S and CMZ900D.
Depending on configuration, the installation may include:
MKM026 Master Compass
MKC327 Control Box
MKT007 Gyrosphere
MKR040 C.Operation Unit
MKR050 Repeater Compass
MKR056 Steering Repeater Compass
MKN019 Junction Box
MKN018 Junction Unit
MKS066 AC Adapter
MKS071 Dual AC Adapter
The exact equipment arrangement should always be confirmed from the vessel installation and equipment nameplate before ordering replacement parts.
The MKM026 Master Compass contains several important electronic assemblies that can be identified and sourced individually.
For engineers troubleshooting a CMZ-900, replacing the complete master compass may not always be necessary. The fault may be associated with one specific board, power section, interface circuit, sensor or mechanical assembly.
Part Number: V8123WB
Description: M.Main Board Assembly
The V8123WB is one of the principal electronic boards documented inside the MKM026 Master Compass.
Common purchasing and search references include:
V8123WB PCB
V8123WB PWB
V8123WB Main Board
V8123WB Main Assembly
MKM026 V8123WB
CMZ900 V8123WB
Yokogawa CMZ900 Main PCB
When requesting this board, customers should provide photographs of the installed PCB and its complete identification markings.
Part Number: V8123WE
Description: M.PWM Board / PWM Inverter Board Assembly
The V8123WE is an important electronic assembly within the MKM026 Master Compass.
Typical search references include:
V8123WE PCB
V8123WE PWB
V8123WE PWM Board
V8123WE Inverter Board
CMZ900 PWM PCB
MKM026 Inverter PCB
Yokogawa V8123WE
Because PWM/inverter circuitry is closely associated with operation of the master-compass gyro system, troubleshooting should consider the complete electrical condition rather than assuming that the gyrosphere itself has failed.
Part Number: V8123WH
Description: M.PS Board Assembly
The V8123WH is the documented Master Compass power-supply board.
Search references:
V8123WH PCB
V8123WH PWB
V8123WH Power Supply
V8123WH PS Board
CMZ900 Power Supply PCB
MKM026 Power Board
Yokogawa V8123WH
Power-related faults should be diagnosed together with incoming supply, connectors, protection devices, associated wiring and other power components.
Part Number: V8123WK
Description: M.Terminal Board Assembly
The V8123WK provides an important electrical connection point within the MKM026 system.
Search references:
V8123WK PCB
V8123WK Terminal Board
MKM026 Terminal PCB
CMZ900 Terminal Board
Yokogawa V8123WK
Part Number: V8114SG
Description: Interface Board Assembly
The V8114SG I/F Board is another individually identifiable board used in the Master Compass electronics.
Search references:
V8114SG PCB
V8114SG PWB
V8114SG Interface Board
CMZ900 Interface PCB
MKM026 I/F Board
Yokogawa V8114SG
Part Number: V8114SL
Description: MM I/F Assembly
Search references include:
V8114SL
V8114SL Interface Assembly
MKM026 MM I/F
CMZ900 Interface Assembly
This component should be identified from the installed equipment before replacement.
In addition to the main PCBs, the MKM026 component structure includes several individually identifiable electrical and mechanical parts.
Important references include:
V8123TC – Transformer Assembly
V8114UQ – Photo Sensor Assembly
V8114LP – Brush Unit Assembly
V8114UR – Stepping Motor Assembly
V8123GZ – Fan Assembly
V8817BH – Noise Filter
5T108F017-14 – Circuit Protector
5T117G008-01 – Belt
V8123DP – Container
V8123DQ – Damper Assembly
V8114ML – Supporting Liquid
These exact numbers can be useful when the requirement is smaller than a complete master compass or PCB replacement.
The MKT007 Gyrosphere is the sensitive gyro element associated with the CMZ-900 Master Compass.
Common search terms include:
MKT007 Gyrosphere
MKT007 Gyro Sphere
MKT007 Sensitive Element
MKT007E Exchange Gyrosphere
CMZ900 Gyrosphere
MKM026 Gyrosphere
SM MARINE SERVICE™ maintains separate detailed technical information for the CMZ-900 MKT007/MKT007E gyrosphere.
For this PCB-focused page, the important point is that a gyro alarm should not automatically be interpreted as a failed gyrosphere. The master-compass PCB, PWM/inverter electronics, power supply, sensor, wiring and related components should also be correctly diagnosed.
The MKC327 Control Box used in applicable CMZ-900 configurations contains several individually identifiable electronic assemblies.
This creates another valuable spare-parts search area beyond the MKM026 Master Compass.
Part Number: V8123VR
Description: Dual PS Board Assembly
Search references:
V8123VR PCB
V8123VR Dual Power Supply Board
MKC327 Power Supply PCB
CMZ900 Control Box Power Board
Yokogawa V8123VR
Part Number: V8123VN
Description: R.Terminal Board Assembly
Search references:
V8123VN PCB
V8123VN Terminal Board
MKC327 R Terminal Board
CMZ900 Control Box PCB
Part Number: V8123VW
Description: S.Terminal Board Assembly
Search references:
V8123VW PCB
V8123VW Terminal Board
MKC327 S Terminal Board
CMZ900 Terminal PCB
Part Number: V8123VZ
Description: C.Terminal Board Assembly
The V8123VZ appears in the CMZ-900 control/distribution architecture and is another important exact-number search term.
Search references:
V8123VZ PCB
V8123VZ C.Terminal Board
CMZ900 V8123VZ
MKC327 Terminal PCB
Yokogawa V8123VZ
Part Number: V8123VT
Description: Changeover Board Assembly
The changeover electronics are particularly relevant to applicable dual-gyro CMZ900D configurations.
Search references:
V8123VT PCB
V8123VT Changeover Board
CMZ900D Changeover PCB
MKC327 Changeover Board
Yokogawa V8123VT
Part Number: V8152AC
Description: Distribution Board Assembly / MHB306
Search references:
V8152AC PCB
V8152AC Distribution Board
MHB306 Distribution Board
MKC327 Distribution PCB
CMZ900 Distribution Board
Other documented MKC327 components include:
V8123MC – Terminal Assembly
V8123XC / V8123XN – Toggle Switch Assemblies, depending on configuration
V8817BF – Filter Kit
V8123GZ – Fan Assembly
V8116VA – Cable Assembly
Control-box configuration and revision must be confirmed before ordering.
The MKN019 Junction Box provides another useful CMZ-900 spare-parts search path.
Part Number: V8114SN
Description: Repeater CPU Board Assembly
Search references:
V8114SN PCB
V8114SN CPU Board
MKN019 CPU PCB
CMZ900 Repeater CPU Board
Yokogawa V8114SN
Part Number: V8114SQ
Description: Terminal Board Assembly
Search references:
V8114SQ PCB
V8114SQ Terminal Board
MKN019 Terminal PCB
CMZ900 Junction Box PCB
The component relationship can therefore be identified as:
CMZ-900 → MKN019 Junction Box → V8114SN CPU Board / V8114SQ Terminal Board
The CMZ-900 system also uses the MKR040 C.Operation Unit in applicable configurations.
Important electronic references associated with the control/operation architecture include:
V8123VE – C.Main Board Assembly
V8123VB – C.Display Board Assembly
V8123VZ – C.Terminal Board Assembly
These numbers provide additional exact-search opportunities for engineers looking for an operation-unit PCB rather than a complete gyrocompass.
Common searches may include:
V8123VE PCB
V8123VE C.Main Board
V8123VB Display PCB
V8123VB Display Board
MKR040 PCB
CMZ900 Operation Unit PCB
V8123WB → M.Main Board → MKM026
V8123WE → M.PWM / Inverter Board → MKM026
V8123WH → M.PS Power Supply Board → MKM026
V8123WK → M.Terminal Board → MKM026
V8114SG → I/F Board → MKM026
V8114SL → MM I/F Assembly → MKM026
V8123VE → C.Main Board → Control / Operation Electronics
V8123VB → C.Display Board → Operation Electronics
V8123VR → Dual PS Board → MKC327
V8123VN → R.Terminal Board → MKC327
V8123VW → S.Terminal Board → MKC327
V8123VZ → C.Terminal Board → MKC327 / Control Architecture
V8123VT → Changeover Board → MKC327
V8152AC → Distribution Board → MKC327-S
V8114SN → RPT CPU Board → MKN019
V8114SQ → Terminal Board → MKN019
This exact relationship is important because engineers frequently search using only the number printed on the failed board.
When a CMZ-900 develops an alarm, unstable heading, communication failure, power problem or other operational fault, replacement of the complete system should not be the first assumption.
Depending on the symptom, inspection may include:
Master Compass Main PCB
PWM / Inverter Board
Power Supply Board
Terminal Board
Interface Board
Control Box Power Electronics
Changeover Board
Operation Unit Main / Display Board
Junction Box CPU Board
Gyrosphere
Photo Sensor
Cables and Connectors
Input Power and Protection Devices
CMZ-900 troubleshooting documentation also links communication-related faults with the Master Compass and control-side main/terminal PCB path. Therefore, accurate fault diagnosis is important before ordering a replacement PCB.
When requesting a CMZ-900 board, do not send only the words “CMZ900 PCB.”
For accurate identification, please provide:
1. Exact PCB/PWB number
Example: V8123WB, V8123WE, V8123WH or V8123VR.
2. Clear front photograph of the PCB
3. Clear rear photograph
4. Photograph of all labels and stickers
5. Equipment model
Example: MKM026, MKC327, MKN019 or MKR040.
6. Complete CMZ-900 nameplate
7. CMZ900B / CMZ900S / CMZ900D configuration if known
8. Required quantity
9. Vessel destination / delivery port
PCB revision and system configuration should be verified before supply.
Depending on exact identification and stock availability, SM MARINE SERVICE™ can support requirements for:
Complete CMZ-900 Gyrocompass
MKM026 Master Compass
MKC327 Control Box
MKT007 / MKT007E Gyrosphere
Main PCB
PWM / Inverter PCB
Power Supply PCB
Interface PCB
Terminal PCB
Control PCB
Display PCB
Changeover PCB
Distribution PCB
Repeater CPU PCB
Junction Box PCB
Photo Sensor
Transformer Assembly
Fan Assembly
Stepping Motor
Brush Unit
Gyro Container
Supporting Liquid
Repeater Compass Components
AC Adapter Components
Cables and Connectors
Supply condition may include New, New Old Stock, Used, Tested Working, Refurbished, Reconditioned or Exchange depending on availability and customer requirement.
A technical superintendent may search for:
“Yokogawa CMZ900 spare parts”
while an engineer onboard may search only:
“V8123WE”
and a purchasing department may search:
“V8123WB PCB supplier”
All three searches can represent the same vessel requirement.
For this reason, SM MARINE SERVICE™ supports identification from the complete system level down to individual board numbers:
CMZ900 → MKM026 → V8123WB
CMZ900 → MKM026 → V8123WE
CMZ900 → MKM026 → V8123WH
CMZ900 → MKC327 → V8123VR
CMZ900 → MKC327 → V8123VT
CMZ900 → MKN019 → V8114SN
This makes it easier for vessel engineers and purchasing departments to locate the correct spare without replacing unnecessary equipment.
SM MARINE SERVICE™ supports ship owners, ship managers, technical superintendents, marine service companies, shipyards and purchasing departments requiring Yokogawa CMZ-900 gyrocompass electronics and difficult-to-find spare parts.
International sourcing and delivery support can be arranged for major marine markets and vessel destinations including Greece, Netherlands, Norway, Denmark, Sweden, Finland, Iceland, Germany, Belgium, France, Spain, Portugal, Italy, Malta, Cyprus, Turkey, Poland, Romania, Croatia, United Kingdom, UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Egypt, South Africa, Singapore, China, Hong Kong, Taiwan, South Korea, Japan, Vietnam, Malaysia, Indonesia, Thailand, Philippines, India, Sri Lanka, Australia, New Zealand, United States, Canada, Mexico, Panama, Brazil, Chile, Peru, Argentina, Uruguay and other international ports worldwide.
The documented M.Main Board Assembly is V8123WB.
V8123WE is the documented M.PWM Board Assembly used in the MKM026 Master Compass.
The documented M.PS Board Assembly is V8123WH.
V8123WK is the M.Terminal Board Assembly associated with the MKM026 Master Compass.
The CMZ-900 technical documentation identifies MKT007 as the gyrosphere used with the MKM026 Master Compass. Exchange references such as MKT007E may also appear in spare-parts supply.
V8123VR is a Dual PS Board Assembly documented in applicable MKC327 Control Box configurations.
V8123VT is a Changeover Board Assembly documented in the MKC327 control equipment.
V8114SN is the RPT CPU Board Assembly and V8114SQ is the Terminal Board Assembly documented for the MKN019 Junction Box.
Yes. If the defective board is correctly identified and the required spare is available, an individual PCB/PWB can be sourced without ordering the complete gyrocompass.
Send the exact PCB number, clear photographs of both sides, equipment model/nameplate, quantity and vessel delivery destination.
Please provide:
Manufacturer: Yokogawa / YDK
System: CMZ-900
Configuration: CMZ900B / CMZ900S / CMZ900D
Master Compass: MKM026
Control Box: MKC327, if applicable
PCB / PWB Part Number:
Required Quantity:
Condition Required:
Clear PCB Photos:
Equipment Nameplate Photo:
Vessel / Delivery Port:
Marine Automation • Navigation • Communication • Ship Spare Parts
Worldwide sourcing support for Yokogawa CMZ-900 gyrocompass, MKM026 PCB/PWB assemblies, MKC327 Control Box boards, MKT007 gyrosphere and associated marine spare parts.
Website: www.smmarineservice.com
Email: info@smmarineservice.com
Mobile / WhatsApp / Viber: +88 01818 929292
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