Hey, I'm looking into my first amp project/build. I have a donor Mullard 5-10, and I've been having a look at schematics which use similar components. I found the matchless spitfire, vox ac15 and marshall 18w.. and then I found this dual lite schematic by Steve lucky. And it's almost too good.. a marshal and vox at the flick of a switch.
https://sluckeyamps.com/dual_lite/dual_lite.htm
https://www.petervis.com/valve-circuits/mullard-5-10-power-amp/mullard-5-10/mullard-5-10-amp-circuit-diagram.jpg
The problem is the transformer for the dual lite (taken from a Hammond organ) has 315-0-315vac, 5vac and 6.3vac. My transformer has 300-0-300vac, 3.15 vac and 6.3vac.
Can I shoe horn this transformer into this schematic with a few components value changes, or should I look for a transformer with the correct specs.
Thanks

Does anyone know how to reset the HVAC in a 2020 Avalon? I spent weeks trying to find anything on the 5th generation, and couldn't even find the fusebox/ relay diagram, let alone the key combination to do this.

"Normal" parts usually have more or less the same pin assignment. This is not true for transformers, which in many cases are custom-made. Here are problems I encounter with these parts.
From the PCB point of view there are standard bobbins with pins, like EE20, EF30 and so on. They have numbered pins just like DIP packages, or may have some pins missing. From the schematic point of view there are transformers with 4 (6, 8, 7 etc) connections, which I may want to associate with pins on the part anyway I like. I see 3 methods of dealing with this problem:

1. Renumber pins on the schematic diagram.
   
2. Renumber pins on the PCB. This works but may accidentally cause a problem when you update other components on the PCB.
   
3. Create local copies of those parts.
   

How do you handle this?

I'm a 3rd year apprentice service plumber and am thinking about switching to a different trade. I'm considering refrigeration and boiler maintenance/install.
I think what draws me to this trade is the fact that you can work alone (how soon?), the general challenges of diagnosing and fixing something and I'm wondering how decent the money is as well.
I'm frankly getting a little bored with plumbing. I understand the systems that I work on. I just started with a new company and they unfortunately decided to pair me with someone who has less than half my experience and he's the "technician". So they pay me $22/hr. to train him, meanwhile I'm not building skills and am bored out of my mind. I could always memorize which shower cartridges go with what valve, but I think it would be wiser to gain a good understanding of the refrigeration cycle (which I know I can do) and apply that to my skillset.
This is the second plumbing company I've worked for and I've found it hard to get good training past a certain point. I learned a lot by making mistakes. I've found that the veteran guys will get put together because they can finish jobs faster and the newer guys seem to work together.
I do a lot of diagnostics on water heaters and sewage ejector pumps, so I know how to use a multimeter in a basic way. I went to a brief trade school for service plumbing and it helped me immensely. A lot of folks say that field experience is the only way, but I disagree. I believe that some learning is better suited to the classroom or living room. Something about being graded was a huge motivator for me to memorize wiring diagrams, troubleshooting steps, tolerances, whatever.
I could test for my license in NC immediately if I wanted to, or if I wanted to test for a national journeyman's, I could have it in 3 years. I'm not attached to being licensed in anything, I just want to earn a good income. I'd go back to school for an intensive program if it's worth it.
I'm 33 and single, so I'd be good with some late/on call work, but it's not something I'd like to make a habit of long-term.
Being in the South, I've never been involved with a labor union, but I'd be curious to know if there are any purely refrigeration unions. Would that just go along with pipefitting/HVAC?
I think it would also help me if I knew whether there were companies hiring directly from reefer programs and if so, would they guarantee a certain pay floor with a good grade?
I appreciate any tips you all have. Thanks!

First < Previous Next >
I snap my head back down, with renewed vigour and hope about communicating with everyone without needing to play charades. With the knowledge that this is a microphone, my mind swims with the possibilities. If they can grow quartz crystals, they may be able to refine and grow silicon crystals, effectively making computers. Getting back on track, I add a resistor above the tremorsense and attach a ground wire below it. Tapping off between the resistor and tremorsense, I look to Silvra and gesture towards the translator.
“And what do you think you are doing?” She remarks, eying the setup with a mix of scepticism and intrigue. Her arms were folded, her brow furrowed in concentration.
“Just because you may be able to overhaul our entire way of life, does not mean I will give you something worth half a year’s wage. You best get to explaining yourself.”
Taking a deep breath, I sketched a quick diagram on the paper between us. I outlined how the piezoelectric effect of the tremorsense could convert sound into electrical signals that the translator could interpret. “It’s like turning vibrations into voices,” I explained, hoping the simplicity of the analogy would bridge the gap my technical terms could not.
“It…should work. Why has no one thought of this before?!” Silvra asks eagerly, reaching for even more paper, with Thallion leaning in to take notes as we possibly cross the language barrier.
Silvra passes me the translator, and carefully I place the tap wire on the central nub, and the ground on the body, similar to how their hands work with the metallic pin and the rest of their hand. I then reach for my phone and attach the power to the resistor, and the ground to the body of the translator as well.
I speak.
“can you hear me?” I ask, apprehensively, hoping I did not just blow up the device. It’s faint whine either being a really good thing, or a very bad thing.
“What was that?!” Lena turns around, after staring off into space as we got technical.
“i said, can you hear me?”
“yes we can!” Lena exclaims, not through the device, but from across the table, her eyes wide with astonishment.
“I can too. it is a little dull, but we can hear you. and you can hear us! without us touching it!” Thallion remarks,
I notice that yes, I can hear them, but rather than being melodic and transferring all the intent behind the meaning of the word, translating the emphasis, it comes across as dull, flat and lifeless, like text to speech readers. I find it quite painful to listen to.
“Perhaps it's a minor calibration issue,” I suggested, already thinking about adjustments to enhance the voice modulation.
“maybe i can sound like a robot for now, but perhaps, you should continue playing hot potato with the translator?”
“forget that!” Silvra remarks. “i may sound flat, but i don’t have to pass the device around! i can just leave it on a desk somewhere and it will just work!”
“not only is this an overhaul in this device, but think of the implications. we can talk across species without needing to touch very complex systems. we may even be able to communicate with animals, Lena!”
Lena perks up at this, “if i could talk to them, then i may be able to convince the big ones to leave us alone, but I worry about what that means if they are truly intelligent.”
Looking back at the device, I think back to the little I remember for analog electronics. The device can pass emotion and translate it, so it is capable of doing so. Maybe there is an issue with the prefilter? I could possibly fix that.
“silvra, it is amazing that we can talk, but I find it painful to listen to all of you due to the robotic voice. i think i can fix it. do you have the schematics for the device?”
“i don’t know what robot is, but i am guessing the flat sound, i do have drawings, let me go get them”
Silvra heads out, and Tallion is writing down everything. Lena is leaning over his shoulder.
“i know you are upset, but what you did is monumental, communication without contact, translation without touch. just remember that you are using your phone for power!” Lena states. I cannot tell emotion but bittersweet is all I can get.
Silvra enters again, knocking the snow off her clothes carrying some yellowed paper. Placing them down before me, I look across them.
“maybe increase the power input? That usually works for us. More space for clarity, or something,” Thallion adds, trying to be helpful.
I shake my head no, trying to ignore what he just said, based on the fact that is how humanity killed the first transatlantic cables. It is not a power issue as the device turns on, but a warping or nonlinearity of the data itself.
After a few moments of staring at the schematics, I find the input and the first thing I see is the massive choke directly after the input.
“a ha! found it!” I exclaim, reaching for the toolkit that Silvra brought over a few days ago. “just need to remove the choke at the front!”
“before you go voiding the warranty on this, why would that solve anything? that is how we regulate the flow of power!”
“i make direct current from my phone, so i don’t need to regulate it, in fact, that choke is destroying all high frequencies. i will talk about it if this works.”
“ok, but i’ll dismantle it. just point out the part on the schematic, and provide a jumper to cross over the holes”
Sighing, I grab the cables from the toolbox, along with the soldering iron and candle. Silvra grabs the components from me, and carefully unscrews the ground bell from around the power pin. Finding the power pin’s input into the interior, there is a large coil. Silvra quickly removes the coil and puts the jumper in its place.
Reassembling it, she gestures for me to talk. Taking a deep breath, and reconnecting my phone, I talk.
“Good afternoon everyone! And welcome to a new era! One of power for all!”
“I can hear you loud and clear!” Silvra exclaims, jumping up from the table.
“Astounding! Decoding the schematic and removing the choke did solve the problem!” Thallion replies.
“It worked before, and now it works better, I still think the first is more important to document”, Lena interjects, clearly getting bored of all of this tech talk
“So, Silvra,” I mention, “removing the choke works due to the same way the coil of wire moves coins: magnetism. Over the next few days we’ll be going over this in a lot more detail, but the choke does not choke the current, it converts it into magnetism, which is then released later. A changing current results in a changing magnet inside. It is very weak but enough to smooth input ripples, and stretch out the input spike slightly, which is probably why it is there in the first place.”
“But it comes with a downside. It acts stronger on faster switching pulses than on slow ones. My dc power has only an on pulse, but the signal of my voice is made of many higher vibrations. The choke would have killed this high frequency, and would have only passed the lower, which would be the fundamental frequencies only, sounding flat. The translator would then only be able to act on this flattened signal.”
“Now, I only got about half of that, but it stores the current as something called magnetism, saving it for later, and smoothing out the input,” Thallion states, looking up from his notes.
“Exactly. Think of it like a dam. Takes the surges and smooths them out, but you lose the changes caused by individual rainfalls”
“So what exactly is magnetism?”
“That is a good question, and contains several fields, chemistry, physics, all of what we classify as science. It will look like magic to you, but any sufficiently advanced magic is indistinguishable from science. Just be ready to learn.
“Does this make the motor thing spin?” Lena asks.
“Yes, yes it does.” I reply, looking at my phone and the power slowly but steadily dropping.

Cascaded control circuits, also known as ladder logic circuits, are a type of electronic circuit used to perform logical operations and control electrical signals in a hierarchical manner in automation systems. These circuits operate based on the principle of comparing the input voltage to predetermined voltage thresholds, thereby generating output signals at different voltage levels.
Basic Structure of a Ladder Diagram
Ladder diagrams are a visual tool for describing logic systems, particularly useful in the field of PLC (Programmable Logic Controller) programming. This diagram is composed of the following main components:
1. Power Rail (Left-hand Rail):

• Contains the program's inputs. These inputs can be signals from sensors, switches, or other devices.
• Represented by vertical lines on the left side of the diagram.

2. Output Rail (Right-hand Rail):

• Contains the program's outputs. These outputs can be control signals for motors, valves, LEDs, or other devices.
• Represented by vertical lines on the right side of the diagram.

3. Rung (Ladder Step):

• Each rung represents a step in the logic process.
• Consists of two parts:
  • Condition Part:
    • Contains contacts that represent the logical conditions that must be met to execute an action.
    • Contacts can be normally open (NO) or normally closed (NC).
    • Represented by square or round symbols.
  • Action Part:
    • Contains coils that represent the actions to be taken when the conditions in the condition part are met.
    • Coils are represented by rectangles.

4. Connections:

• Used to connect contacts and coils to each other, forming complete logic expressions.
• Represented by horizontal lines connecting elements within a rung.

Examples of Components and Sample Rungs
Example 1: Turning on a Light When a Switch is Pressed
Power Rail: Switch (input) Output Rail: Light (output) Rung:

• Condition: NO contact of the switch
• Action: Coil controlling the light
• Connection: Connect the NO contact of the switch to the coil controlling the light

Example 2: Using a Temperature Sensor to Control a Fan
Power Rail:

• NTC temperature sensor (input) Output Rail:
• Coil controlling the fan (output) Rung 1:
• Condition:
  • NO contact of the temperature sensor (when temperature > 25°C)
• Action:
  • Turn off the coil controlling the fan Rung 2:
• Condition:
  • NC contact of the temperature sensor (when temperature < 20°C)
• Action:
  • Turn on the coil controlling the fan Connections:
• Connect the NO contact of the temperature sensor to the coil controlling the fan (Rung 1)
• Connect the NC contact of the temperature sensor to the coil controlling the fan (Rung 2)

Explanation:

• When the room temperature is higher than 25°C, the NO contact of the temperature sensor will close, activating the coil controlling the fan and turning on the fan to cool the room.
• When the room temperature is lower than 20°C, the NC contact of the temperature sensor will close, activating the coil controlling the fan and turning off the fan to keep the room warm.

Note:

• This example only uses two basic rungs to control the fan at two fixed temperature levels.
• The diagram can be expanded with more rungs to control the fan at different temperature levels or combined with other sensors and devices to create a more complete automatic control system.
• The choice of temperature sensor, threshold temperature values, and control logic depends on the specific requirements of the application.

Structure of Various Sensors
NTC Temperature Sensor:

• Operating Principle: NTC (Negative Temperature Coefficient) temperature sensors are a type of resistor whose resistance decreases with increasing temperature.
• Structure: Consists of a semiconductor material made into a small resistor. When the temperature changes, the resistance of the semiconductor material also changes.
• Operation: As the temperature increases, the crystal structure of the semiconductor material changes, creating more conductive holes, leading to a decrease in resistance. Conversely, as the temperature decreases, the resistance of the NTC will increase.
• Applications: Heating system control, air conditioning system control, temperature alarm, etc.

Optical Sensor:

• Operating Principle: Detects the presence, position, or characteristics of an object using light.
• Structure: Includes a light source (such as LED, laser) and a receiver (such as photodiode, phototransistor).
• Operation:
  • Reflective Optical Sensor: Light from the emitter is reflected by the object and received by the receiver. When an object appears or moves, the received signal changes, activating the output.
  • Beam-Break Optical Sensor: Light from the emitter is blocked by the object, affecting the received signal. When an object appears or moves, the received signal changes, activating the output.
  • Spectroscopic Optical Sensor: Analyzes the light reflected from an object to determine the color, material, or other characteristics of the object.
• Applications: Optical sensors are widely used in various fields such as industrial automation, door access control, security, healthcare, etc.

Proximity Sensor:

• Operating Principle: Detects the presence of an object at a close distance without direct contact.
• Structure: Includes an emitter and receiver of electromagnetic waves, electric fields, or sound waves.
• Operation:
  • Electromagnetic Proximity Sensor: Uses a coil to create a magnetic field. When a metal object approaches, the magnetic field is distorted, affecting the received signal.
  • Eddy Current Proximity Sensor: Uses an antenna to transmit and receive electromagnetic waves. When an object approaches, the electromagnetic waves are reflected, affecting the received signal.
  • Ultrasonic Proximity Sensor: Uses a speaker to emit sound waves and a microphone to receive reflected waves. When an object approaches, the reflection time of the sound waves changes, affecting the received signal.
• Applications: Proximity sensors are used in various fields such as industrial automation, door access control, elevators, robots, etc.

Pressure Sensor:

• Operating Principle: Measures the pressure of a liquid or gas.
• Structure: Includes an elastic diaphragm, a strain gauge, or a semiconductor pressure sensor.
• Operation:
  • Diaphragm Pressure Sensor: When pressure changes, the elastic diaphragm is deformed, affecting the resistance or voltage signal.
  • Strain Gauge Pressure Sensor: Uses a strain gauge to measure pressure. When pressure changes, the resistance of the strain gauge changes, affecting the voltage signal.
  • Semiconductor Pressure Sensor: Uses a semiconductor chip to measure pressure. When pressure changes, the voltage signal on the chip changes.
• Applications: Pressure sensors are used in various fields such as healthcare, aerospace, automotive, industrial, etc.

Accelerometer:

• Operating Principle: Measures the acceleration of an object (rate of change of velocity).
• Structure: Includes an accelerometer mass, a spring, and a position sensor.
• Operation: When the object moves, the accelerometer mass is subjected to inertial force, causing it to move relative to the spring. The position sensor measures the position of the accelerometer mass, from which the acceleration of the object is calculated.
• Applications: Accelerometers are used in various fields such as aerospace, automotive, smartphones, robots, etc.

Force Sensor:

• Operating Principle: Measures the force applied to an object.
• Structure: Includes a mechanical deformation (tension, compression, bending) and a position sensor or strain gauge.
• Operation:
  • Electromechanical Force Sensor: When a force is applied, the object is deformed, affecting the resistance of the strain gauge.
  • Semiconductor Force Sensor: Uses a semiconductor chip to measure force. When a force is applied, the voltage signal on the chip changes.
• Applications: Force sensors are used in various fields such as industrial automation, electronic scales, robots, healthcare, etc.

Humidity Sensor:

• Operating Principle: Measures the humidity (amount of water vapor) in the air or surrounding environment.
• Structure: Includes a hygroscopic material (such as polymer, salt) and a resistance or capacitance sensor.
• Operation:
  • Resistance Humidity Sensor: When humidity changes, the resistance of the hygroscopic material changes, affecting the voltage signal.
  • Capacitance Humidity Sensor: When humidity changes, the capacitance of the hygroscopic material changes, affecting the voltage signal.
• Applications: Humidity sensors are used in various fields such as HVAC (heating, ventilation, and air conditioning), healthcare, food production, agriculture, etc.

Gas Sensor:

• Operating Principle: Detects the presence or concentration of specific types of gases.
• Structure: Includes a gas-sensitive material (such as semiconductor, conductive polymer) and a resistance or capacitance sensor.
• Operation: When the target gas comes into contact with the sensitive material, the resistance or capacitance of the material changes, affecting the voltage signal.
• Applications: Gas sensors are used in various fields such as industrial safety, environmental control, healthcare, gas detection, etc.

Additional Notes:

• The provided information on sensors covers a wide range of commonly used sensors in various applications.
• Each sensor type has its unique characteristics, operating principles, and applications.
• The selection of the appropriate sensor for a specific application depends on factors such as the target parameter to be measured, the required accuracy, operating conditions, and cost considerations.
• Sensors play a crucial role in various industries and scientific fields, enabling data acquisition, monitoring, and control processes.

The Advent of PLCs (Programmable Logic Controllers)

Prior to the introduction of PLCs (Programmable Logic Controllers), industrial control systems primarily relied on relays to perform control logic. However, the use of relays presented several drawbacks, including:
· Difficulties in Design and Programming: Designing and programming control systems using relays for complex circuits was time-consuming, labor-intensive, and required high expertise.
· Challenges in Troubleshooting and Maintenance: Identifying and rectifying faults within relay-based systems was a lengthy and laborious process.
· Lack of Flexibility: Modifying control logic in relay systems was intricate and expensive.
· Bulky Size: Relay systems often occupied substantial space due to their large size.
The advent of PLCs addressed the limitations of traditional relay systems, offering numerous advantages:
· Ease of Programming: PLCs can be programmed using user-friendly languages like Ladder Logic, Function Block Diagram, and others. This facilitates quicker and simpler design and programming of control systems.
· Simplified Troubleshooting and Maintenance: PLCs possess self-diagnostic capabilities, enabling faster and easier fault identification and rectification within the system.
· High Flexibility: Control logic in PLCs can be readily modified by altering the programming code.
· Compact Size: PLCs are compact, saving installation space.
Owing to these benefits, PLCs rapidly gained popularity as preferred control devices in industrial applications. Today, PLCs are extensively employed across diverse sectors, including:
· Manufacturing: PLCs control automated production lines, encompassing electronics, automotive, food processing, and other manufacturing industries.
· Building Automation: PLCs manage lighting systems, HVAC systems, security systems, and more in buildings.
· Energy: PLCs oversee power systems, water systems, gas systems, and the like.
· Transportation: PLCs handle transportation systems, including railways, roadways, aviation, and others.
The introduction of PLCs marked a revolutionary step in the field of industrial automation, contributing to enhanced production efficiency and productivity.
Many sources

I really dislike my job. It’s mechanical assembly tech for switchboards I don’t dislike the physical work but I do dislike the disrespect. I do not feel like a person who’s valued here. A pretty far cry from how I felt at my last job. I have skills, I know how to solder, I read mechanical and circuit schematic diagrams and build 7ft-9ft tall units lifting and tieing metal together that weighs 50-100lbs with bolts and making it look good. It’s not just building just to build I can make 20 pieces of metal look like one peice if u stare at it from 3 meters away. I know I have skills yet this place treats me like I’m highly replaceable, I want to show them I’m not by leaving. I just don’t understand what work I qualify for anymore.
Skills: Mechanical assembly Power tools/hand tools Soldering Ohm meteoscillator reading 1 year of credits in electronics engineering technology 1 year of serving experience 2 years troubleshooting 1 year of repairing electronics

Just bought my first F-150 (‘14 5.0 4x4 Platinum) and was wondering what site you used to get part #’s, images and exploded views.
Some sites have very basic info, and others are a little more detailed. Which parts sites do you use?
Also, are there any pdf of parts and part numbers floating around?

All right, I’ve tried everything and at this point, I think I’m losing my mind. I’ve upgrade my MIJ Mustang bass to Nordstrand NM4 PUPs. I wired everything to this schematic. I did all of this with new 250k audio pots, new switchcraft jack, and orange drop capacitor. I’m not the best at soldering, but I’m not a beginner either. Now, I have a hum that wasn’t there before. Here’s the trouble shooting steps I’ve taken and there’s still a hum:

1. Ground the bridge. Tried several different positions for the wire on the bridge. Even shielded the little cavity the wire comes out of below the bridge. I even tried scratching the bridge up to make better contact.
   
2. Shield all the cavities. I also grounded the shielding in the cavity below the control plate to one of pots.
   
3. Took a piece of wire and tried ground every. Single. Piece. of metal to the ground on the jack. I even tried to temp a ground from the PUP ground to the shielding and the jack
   
4. Tried a different 1/4” TS cable
   
5. Tried the amp on multiple circuits in the house.
   

The only thing that seems to stop the hum is grounding the open lug of the tone pot to something which obviously doesn’t work. I think it just shorts the whole circuit. It also goes away with the tone pot all the way down, but that makes sense.
So, any thoughts? Is it just the way it is with this type of PUP? Thanks in advance for any help. Let me know if I can provide more info.

I'm in the United States. I've decided I most likely want to become a controls tech after having posted here and in other subreddits and having learned more about the field over the past few days. I have a better overall understanding of what this career entails thanks to all of your answers from prior threads, but still would like some clarification on a few things.

1. Is this an accurate description of the controls tech job? --A controls tech is the person that works on the software programming side of HVAC/Building Automation Systems. As a controls tech, I'd be diagramming control systems on a computer, using software like Metasys. My entire job would be doing work on a computer, consulting with and speaking to clients over the phone, sitting in on corporate meetings, and collaborating with service technicians to fix any issues that arise with the actual hardware components used in a building's system (although, I wouldn't be working on any hardware myself). There is no travel involved with the job.
2. Is it true that the Building Automation Systems industry is starving for controls techs? I've read that HVAC, and the trades in general (in the United States), need people.
3. What is the salary ceiling on the control tech's career?
4. What are the growth opportunities for a control tech--that is, what positions can I move up into from that role?
5. If I start in Building Automation as a control tech, can I pivot into other areas later, like PLC?
6. Are Johnson Controls or Siemens good places to get started as an entry level controls tech? Seems like these places have a very solid onboarding process.
7. Is a 60-hour workweek the norm for a control tech at places like Johnson Controls and Siemens?
8. What are your thoughts on this job being outsourced to India and the role of AI in this job over the next 10-20 years?

Thanks very much for your input in advance.

I'm in the United States. I've decided I most likely want to become a controls tech after having posted here and in other subreddits and having learned more about the field over the past few days. I have a better overall understanding of what this career entails thanks to all of your answers from prior threads, but still would like some clarification on a few things.

1. Is this an accurate description of the controls tech job? --A controls tech is the person that works on the software programming side of HVAC/Building Automation Systems. As a controls tech, I'd be diagramming control systems on a computer, using software like Metasys. My entire job would be doing work on a computer, consulting with and speaking to clients over the phone, sitting in on corporate meetings, and collaborating with service technicians to fix any issues that arise with the actual hardware components used in a building's system (although, I wouldn't be working on any hardware myself). There is no travel involved with the job.
2. Is it true that the Building Automation Systems industry is starving for controls techs? I've read that HVAC, and the trades in general (in the United States), need people.
3. What is the salary ceiling on the control tech's career?
4. What are the growth opportunities for a control tech--that is, what positions can I move up into from that role?
5. If I start in Building Automation as a control tech, can I pivot into other areas later, like PLC?
6. Are Johnson Controls or Siemens good places to get started as an entry level controls tech? Seems like these places have a very solid onboarding process.
7. Is a 60-hour workweek the norm for a control tech at places like Johnson Controls and Siemens?
8. What are your thoughts on this job being outsourced to India and the role of AI in this job over the next 10-20 years?

Thanks very much for your input in advance.

Hello All,
Would like some recommendations on a small 10-13" laptop capable of running WoW and Diablo 3-4. Resolution is not really a concern. I'd be happy with the low preset running 60 frames. I don't really play anything new or intensive.
I like this form factor with the type of work I do. Cramped spaces, troubleshooting electronics, reading diagrams/schematics, where my hulking gaming laptop is a good old fashioned PIA.
Any recommendations?

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I’m rebuilding a Pac-Man countercade model 8121. Can anyone provide me with the motherboard schematic and diagram of the wiring harness? It’s gbx71-v01 board. Thanks

I’m rebuilding a Pac-Man countercade model 8121. Can anyone provide me with the motherboard schematic and diagram of the wiring harness? It’s gbx71-v01 board. Thanks