Yokogawa PT500A PT500D Autopilot PCB/PWB & Spare Parts
YOKOGAWA DENSHIKIKI CO., LTD.
Refurbished
The Yokogawa / YDK PT500 Series Autopilot is a marine automatic steering system installed on commercial vessels worldwide.
The PT500 family includes two principal versions:
PT500A – Adaptive Autopilot
PT500D – Digital Autopilot
A vessel does not always require replacement of the complete PT500 autopilot. In many service cases, the actual defective component may be an individual CPU PCB, PWB, terminal board, interface board, servo control board, rotary encoder, rudder feedback transmitter, potentiometer, actuator component or other electronic module.
For this reason, SM MARINE SERVICE™ supports PT500 requirements at both complete-system and individual-component level.
A customer may search for:
Yokogawa PT500A Autopilot
or only:
Yokogawa V8866DE CPU Board
Yokogawa V8845AC Auto Terminal Board
Yokogawa V8820PZ KT Control Board
Yokogawa V8823EZ Potentiometer
Yokogawa PT120 Rudder Feedback
All of these can relate to the PT500 steering-control family.
The PT500 series uses different primary auto-steering units according to version.
The PT500A Adaptive Autopilot uses the:
Yokogawa PB343 Adaptive Auto Steering Unit
This unit provides the adaptive-control function of the PT500A system.
The PT500D Digital Autopilot uses the:
Yokogawa PB344 Digital PID Auto Steering Unit
The system can also incorporate:
Yokogawa PB345 Auto Steering / PID Unit
depending on the system configuration.
Correct identification of PT500A or PT500D is therefore important when sourcing internal electronics.
Depending on the vessel and steering-gear arrangement, PT500 systems can include equipment such as:
PM208 Control Stand
PB343 Adaptive Auto Steering Unit
PB344 Digital PID Auto Steering Unit
PB345 Auto Steering / PID Unit
PB335 Helm Unit
PH614 Annunciator Unit
PH718 System Selector
PH720 Steering Mode Selector
PH721 Auto Unit Selector
MKR051 Steering Repeater Compass
MPS103/Z Terminal Power Unit
Auto Terminal Unit
Manual Terminal Units
Control & Power Box
PT120 / PT123 / MPT123A μ-Transmitter
PT111 Rudder Transmitter
PV008 / MPV008A DD Motor
Steering Gear Actuator
The installed combination varies according to the vessel's steering system.
The Yokogawa PB343 is a major control unit used with the PT500A Adaptive Autopilot.
It receives and processes information required for automatic steering and works with the other control, terminal, feedback and actuator sections of the PT500 system.
One of the most important identifiable boards associated with this section is:
Manufacturer: Yokogawa / YDK
PCB No.: V8866DE
Description: CPU Board
Associated Equipment: PB343 / PT500 auto-steering architecture
The Yokogawa V8866DE CPU Board is an important PCB reference documented within the PT500 auto-steering system.
Search references include:
Yokogawa V8866DE
Yokogawa V8866DE CPU Board
V8866DE CPU PCB
V8866DE PWB
V8866DE Circuit Board
PT500 V8866DE
PT500A V8866DE
PB343 V8866DE
Yokogawa PB343 CPU PCB
When replacing this board, the existing PCB number and system configuration should be verified from the installed equipment.
Manufacturer: Yokogawa / YDK
Part No.: V8845AC
Description: Auto Terminal Board
Application: PT500 Auto Steering / Terminal Section
The Yokogawa V8845AC Auto Terminal Board is documented in the PT500 system wiring architecture.
The terminal board interfaces multiple steering and control signals between the auto-steering electronics and associated PT500 system components.
Common searches:
Yokogawa V8845AC
V8845AC Auto Terminal Board
V8845AC PCB
V8845AC PWB
PT500 V8845AC
PT500 Auto Terminal PCB
Yokogawa PT500 Terminal Board
Manufacturer: Yokogawa / YDK
Part No.: V8847BB
Description: Manual Terminal Board
The PT500 architecture can contain multiple manual terminal sections.
The Yokogawa V8847BB board is documented within these terminal circuits.
Search references:
Yokogawa V8847BB
V8847BB Manual Terminal Board
V8847BB PCB
V8847BB PWB
PT500 Manual Terminal PCB
PT500 V8847BB
The MPS103/Z Terminal Power Unit forms part of the PT500 terminal and power-distribution architecture.
A documented reference associated with this section is:
Part No.: V8858JU
Equipment: MPS103/Z Terminal Power Unit
Useful search terms include:
Yokogawa V8858JU
V8858JU Terminal Power Unit
V8858JU PCB
MPS103/Z V8858JU
Yokogawa MPS103/Z
PT500 Terminal Power Unit
The MPS103/Z section interfaces power and multiple steering/control signals within the system.
Another documented PT500 spare reference is:
Part No.: V8219TH
Description: MM I/F Board / Interface Board
Application: PT500 family
Search references:
Yokogawa V8219TH
V8219TH MM I/F Board
V8219TH Interface PCB
V8219TH PCB
PT500 V8219TH
PT500 Interface Board
Interface-board failures can affect signal transfer even when the main autopilot display remains operational.
Part No.: V8814WP
Description: Rotary Encoder / Course Dial Encoder**
Associated Units: PB343 / PB344 and related steering-control equipment
The Yokogawa V8814WP Rotary Encoder is another important PT500 component.
Search references:
Yokogawa V8814WP
V8814WP Rotary Encoder
PB343 Rotary Encoder
PB344 Rotary Encoder
PT500 Course Dial Encoder
PT500 Rotary Encoder
A failure in an encoder or course-setting input component can create symptoms different from a CPU-board failure, so correct fault diagnosis is important.
The steering-control side of the PT500 can contain dedicated servo/control electronics.
Known PT500 spare references include the Yokogawa V8219-series Servo Control Board Assembly.
Useful searches include:
Yokogawa V8219 Servo Control Board
V8219 Servo Control Board Assembly
PT500 Servo Control PCB
PT500 Servo Board
Yokogawa Autopilot Servo Control Board
Because PT500 steering configurations differ, the complete board marking and Control & Power Box model should be checked before replacement.
For applicable PT500 steering configurations, the PC134 Control & Power Box contains identifiable KT control electronics.
Two especially important spare references are:
Current Reference: V8820PZ
Earlier Reference: V8219XT
Description: KT Control Board
Associated Equipment: PC134
Search references:
Yokogawa V8820PZ
V8820PZ KT Control Board
V8820PZ PCB
V8219XT
V8219XT Control Board
PC134 Control PCB
PT500 V8820PZ
PT500 KT Control Board
The earlier and later references are valuable for identifying boards from vessels carrying older equipment markings.
Current Reference: V8820QB
Earlier Reference: V8219XU
Description: KT Terminal Board
Associated Equipment: PC134
Search references:
Yokogawa V8820QB
V8820QB KT Terminal Board
V8820QB PCB
V8219XU
V8219XU Terminal Board
PC134 Terminal Board
PT500 V8820QB
When requesting these boards, customers should provide photographs showing the exact installed reference.
Another PT500-related steering spare reference is:
Yokogawa V8820YH
Description: Terminal Board with Potentiometer
Associated Equipment: PV008 DD Motor Unit
Search terms:
Yokogawa V8820YH
V8820YH Terminal Board
V8820YH Potentiometer Board
PV008 V8820YH
PT500 DD Motor Terminal Board
Rudder feedback is a critical part of any automatic steering system.
The autopilot must know the actual rudder position so that commanded rudder angle can be compared with physical rudder movement.
PT500 installations can use feedback equipment including:
PT120 μ-Transmitter
PT123 μ-Transmitter
MPT123A μ-Transmitter
PT111 Rudder Transmitter
These units are mechanically linked to rudder movement and provide position information to the steering-control system.
The Yokogawa PT120 μ-Transmitter is used as a rudder-feedback component in PT500 steering installations.
Search references:
Yokogawa PT120
PT120 μ-Transmitter
PT120 Mu Transmitter
PT120 Rudder Feedback
PT120 Feedback Unit
PT500 PT120
PT500 Rudder Feedback Unit
Yokogawa PT500 Feedback Transmitter
Inside the feedback transmitter, the condition of the potentiometer, mechanical linkage and gears is important for accurate rudder-angle feedback.
The μ-Transmitter contains a potentiometer used to detect rudder position.
Relevant searches can therefore include:
Yokogawa PT120 Potentiometer
PT123 Potentiometer
MPT123A Potentiometer
PT500 Feedback Potentiometer
PT500 Rudder Feedback Potentiometer
Yokogawa μ-Transmitter Potentiometer
This is particularly important because an engineer experiencing unstable or incorrect rudder feedback may search for the potentiometer rather than the complete PT120 transmitter.
The PV008 DD Motor Unit is another important component found in applicable PT500 steering configurations.
It forms part of the actuator/control mechanism.
Search references include:
Yokogawa PV008
PV008 DD Motor
PV008 DD Motor Unit
PT500 PV008
PT500 DD Motor
PT500 Steering Actuator
Yokogawa PT500 Actuator
A particularly valuable exact spare-part reference is:
Manufacturer: Yokogawa / YDK
Part No.: V8823EZ
Description: DD Motor Potentiometer
Application: PV008 / MPV008A DD Motor
Search references:
Yokogawa V8823EZ
V8823EZ Potentiometer
V8823EZ DD Motor Potentiometer
PV008 V8823EZ
MPV008A V8823EZ
PT500 V8823EZ
PT500 DD Motor Potentiometer
This is exactly the type of small internal component that may be required without replacing the complete actuator.
Different steering-gear arrangements can require different Control & Power Box configurations.
PT500 service documentation contains multiple control/power-box references, including units from the PC131/PC13x family, depending on steering type.
These sections can contain:
Control PCB
Servo control electronics
Terminal boards
Relay circuits
Power components
Solenoid-control circuitry
Actuator-control circuitry
The exact box model must therefore be supplied before recommending an internal replacement component.
Yokogawa V8866DE → CPU Board → PB343/PT500 Auto Steering
Yokogawa V8845AC → Auto Terminal Board → PT500 Auto Steering
Yokogawa V8847BB → Manual Terminal Board → PT500
Yokogawa V8858JU → Terminal Power Unit → MPS103/Z
Yokogawa V8219TH → MM I/F Board → PT500 Interface Electronics
Yokogawa V8814WP → Rotary Encoder → PB343/PB344
Yokogawa V8219-series → Servo Control Board → PT500 Steering Electronics
Yokogawa V8820PZ / V8219XT → KT Control Board → PC134
Yokogawa V8820QB / V8219XU → KT Terminal Board → PC134
Yokogawa V8820YH → Terminal Board with Potentiometer → PV008
Yokogawa V8823EZ → DD Motor Potentiometer → PV008/MPV008A
Yokogawa PT120 → μ-Transmitter → Rudder Feedback
Yokogawa PV008 → DD Motor Unit → Steering Actuator Section
This cross-reference allows a buyer to identify the parent PT500 system even when only an individual PCB or spare-part number is available.
A PT500 problem does not automatically mean that the complete autopilot is defective.
Depending on the symptoms, engineers may investigate:
CPU PCB failure
Auto Terminal Board fault
Manual Terminal Board fault
Interface Board fault
Servo Control PCB fault
Control & Power Box fault
Rudder feedback error
PT120 μ-Transmitter fault
Feedback potentiometer wear
Course dial / rotary encoder fault
DD Motor potentiometer fault
Actuator fault
Power supply failure
Terminal connection problem
Heading-input problem
Rudder-order signal problem
For this reason, fault symptoms and exact component identification should be reviewed before replacement.
Incorrect rudder feedback can cause steering-control problems even when the main PT500 CPU is functioning.
Possible areas requiring inspection include:
PT120 / PT123 / MPT123A feedback transmitter
Potentiometer
Mechanical linkage
Internal gears
Feedback wiring
Terminal connections
Supply voltage
Associated terminal/control electronics
A defective feedback component should not automatically be diagnosed as a defective main CPU board.
For applicable installations, the PV008 / MPV008A DD Motor and associated potentiometer form part of the steering actuator/control system.
Relevant components can include:
PV008 DD Motor
MPV008A DD Motor
V8823EZ DD Motor Potentiometer
V8820YH Terminal Board
Associated relay/control electronics
Control & Power Box
The exact steering-gear arrangement must be confirmed before parts are selected.
For accurate identification, please provide:
Manufacturer: Yokogawa / YDK
Autopilot Model: PT500A or PT500D
Unit Model: PB343 / PB344 / PB345 / PC13x / PT120 / PV008 / Other
Exact PCB/PWB Number
All Secondary Numbers
PCB Revision
Clear Front-Side Photograph
Clear Rear-Side Photograph
Connector and Label Photographs
Equipment Nameplate
Fault Description
Required Quantity
Vessel Name or Delivery Port
Never select an obsolete PT500 board only from its physical appearance.
Exact part number, revision and steering configuration should be confirmed.
SM MARINE SERVICE™ can also review requirements for the complete Yokogawa PT500A or PT500D Autopilot system, subject to configuration and availability.
A complete-system enquiry should include the existing system model, steering-gear type, vessel information, input/output requirements and photographs of the current installation.
Where replacement of only an individual component is practical, customers can instead request the exact PCB, module, feedback transmitter, actuator component or other spare part.
Depending on exact identification and availability, SM MARINE SERVICE™ can support requirements for:
Complete PT500A / PT500D Autopilot
PM208 Control Stand
PB343 Adaptive Auto Steering Unit
PB344 Digital Auto Steering Unit
PB345 Auto Steering / PID Unit
V8866DE CPU Board
V8845AC Auto Terminal Board
V8847BB Manual Terminal Board
V8858JU Terminal Power Unit
V8219TH MM I/F Board
V8814WP Rotary Encoder
V8219-series Servo Control Board
V8820PZ / V8219XT KT Control Board
V8820QB / V8219XU KT Terminal Board
V8820YH Terminal Board
PT120 / PT123 / MPT123A μ-Transmitter
V8823EZ DD Motor Potentiometer
PV008 / MPV008A DD Motor
PH614 Annunciator Unit
PH718 System Selector
PH720 Steering Mode Selector
PH721 Auto Unit Selector
MKR051 Steering Repeater
Control & Power Box components
Relay / terminal / interface components
Other obsolete PT500 electronic spare parts
Parts may be available as New Old Stock, Used, Tested Working, Refurbished, Reconditioned or Serviceable, depending on the exact component.
A purchasing department may search:
Yokogawa PT500 spare parts
A technical superintendent may search:
PT500A PCB
A service engineer may search:
Yokogawa PB343 CPU Board
Another engineer may search only:
V8866DE
Another vessel may require:
V8823EZ DD Motor Potentiometer
These searches can all relate to the same PT500 autopilot family.
SM MARINE SERVICE™ therefore supports identification from the complete system down to individual internal components:
PT500A → PB343 → Yokogawa V8866DE CPU Board
PT500 → Auto Terminal → Yokogawa V8845AC
PT500 → MPS103/Z → Yokogawa V8858JU
PT500 → PC134 → Yokogawa V8820PZ / V8219XT
PT500 → PC134 → Yokogawa V8820QB / V8219XU
PT500 → Rudder Feedback → Yokogawa PT120
PT500 → PV008 → Yokogawa V8823EZ Potentiometer
This equipment-to-component relationship helps engineers and purchasing departments identify difficult-to-find legacy parts.
SM MARINE SERVICE™ supports ship owners, ship managers, technical superintendents, marine engineers, shipyards, repair companies and purchasing departments worldwide.
Yokogawa PT500 PCB/PWB and spare-part enquiries can be supported for vessels operating through major marine markets and ports in:
Greece, Netherlands, Norway, Denmark, Sweden, Finland, Iceland, Germany, Belgium, France, Spain, Portugal, Italy, Malta, Cyprus, Turkey, United Kingdom, Poland, Romania, Croatia, 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 locations.
International vessel-delivery requirements can be reviewed according to destination, urgency and available stock.
PT500A is the adaptive version of the PT500 series and uses the PB343 Adaptive Auto Steering Unit. PT500D is the digital version and uses the PB344 Digital PID Auto Steering Unit.
V8866DE is a CPU Board documented within the PT500 auto-steering architecture.
V8845AC is an Auto Terminal Board documented in the PT500 system.
V8847BB is a Manual Terminal Board used in the PT500 terminal architecture.
V8858JU is associated with the MPS103/Z Terminal Power Unit.
V8219TH is identified as an MM I/F Board associated with PT500 equipment.
V8814WP is a rotary encoder associated with PB343/PB344 and related course-setting electronics.
V8820PZ is a KT Control Board associated with the PC134 control section. V8219XT is an earlier reference found for this component family.
V8820QB is a KT Terminal Board associated with PC134. V8219XU is an earlier reference.
PT120 is a μ-Transmitter used for rudder-position feedback in applicable PT500 steering installations.
V8823EZ is a DD Motor Potentiometer documented for PV008/MPV008A steering actuator equipment.
Yes. Customers can send the exact PCB number and photographs for identification. Availability and compatibility must be confirmed for each requirement.
Complete-system requirements can be reviewed according to model, steering configuration, condition required and availability.
Please send the following information:
Manufacturer: Yokogawa / YDK
Autopilot Model: PT500A / PT500D
Unit Model: PB343 / PB344 / PB345 / PM208 / PC13x / PT120 / PV008 / Other
PCB / PWB / Part Number:
Old Part Number, if available:
PCB Revision:
Quantity:
Required Condition:
Clear Photographs:
Equipment Nameplate:
Fault Description:
Vessel / Delivery Port / Country:
Marine Automation • Navigation • Communication • Ship Spare Parts
Worldwide sourcing support for Yokogawa PT500A/PT500D complete autopilot systems, PCB/PWB assemblies, CPU boards, terminal boards, interface boards, servo-control electronics, rudder-feedback components, potentiometers, DD motor components and obsolete marine spare parts.
Website: www.smmarineservice.com
Email: info@smmarineservice.com
Mobile / WhatsApp / Viber: +88 01818 929292
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