The depth flashes and every now and then thwe screen freezes,the chart speed 0

The pressure switch on the master cylinder has nothing to do with the cruise control . The pressure switch as you call it is not a pressure switch at all . Brake fluid level sensor . The brake switch is under the dash on top of the brake pedal linkage (arm) .
Speed Control The vehicle speed control consists of the following components:

• speed control servo (9C735)
• speed control actuator cable (9A825)
• speed control indicator lamp
• speed control actuator switches (9D743)
• brake pedal position (BPP) switch (13480)
• deactivator switch
• anti-lock brake control module (2C018)
• clutch pedal position (CPP) switch
• Self-Test Diagnostics
  WARNING: This test is a key on engine off (KOEO) test only that is conducted in PARK only with parking brake fully engaged.
  
  • Enter Self-Test Diagnostics by depressing the speed control OFF switch while turning the ignition key ON, making sure the engine does not start and is not running. The speed control indicator lamp on the instrument panel will flash once to indicate that the speed control module entered the diagnostic mode.
  NOTE: Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.
  
  • Release the OFF switch.
  • NOTE: If the ON switch is not pressed within five seconds after entering the diagnostic mode, the module times out and the procedure must be started over.
    Press the remaining switches in this sequence: ON, RSM (resume), CST (coast), and SET/ACCEL. The speed control indicator lamp will flash as each switch is pressed. Press each switch in the sequence immediately after the light goes out for the previous switch.
  • A lamp flash with the last button (SET/ACCEL) indicates that the STATIC test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is defective. If the lamp does not flash with the last button, and additional flashes occur, follow the chart below for trouble codes:
    • Two flashes - Brake pedal position (BPP) switch is defective, circuit is defective, or brake pedal is applied; clutch pedal position (CPP) switch is defective, circuit is defective, or clutch pedal is applied.
    • Three flashes - Brake deactivation switch is open or circuit is defective.
    • Four flashes - Vehicle speed signal is out of range or circuit is defective.
  • Immediately after the static test has passed, the speed servo will then carry out a dynamic test automatically by actuating the throttle lever from 1mm to 10 mm of travel from the idle position. During the dynamic throttle pull, observe the throttle movement to witness any binding or sticking of actuator cable, correct connection of actuator cable to throttle lever, and make sure the throttle returns back to idle position. If incorrect connection and/or binding or sticking of actuator is observed, go to the Symptom Chart. If dynamic pull at the throttle body is observed, Go To Pinpoint Test A .
  • Return the ignition switch to the OFF position and proceed to the Symptom Chart.
  Symptom Chart

Symptom Chart
NOTE: Self-Test Diagnostics must be carried out before proceeding to the Symptom Chart.
Symptom Chart Condition Possible Sources Action

• Flash code 1 - system pass

• -

• System Pass.

• Flash code 1 - no dynamic pull at throttle body

• Speed control actuator cable.
• Speed control servo.

• GO to Pinpoint Test A .

• Flash code 1 - speed control inoperative

• Circuitry.
• Speed control servo.

• GO to Pinpoint Test D .

• Flash code 2 - BBP switch circuit failure

• Circuitry.
• BPP switch.
• CPP switch or jumper.
• Speed control servo.

• GO to Pinpoint Test B .

• Flash code 3 - deactivator switch

• CJB Fuse 13 (20A).
• Circuitry.
• Deactivator switch.
• Speed control servo.

• GO to Pinpoint Test C .

• Flash code 4 - speed signal circuit failure

• Circuitry.
• Speed control servo.
• Anti-lock brake control module.

• GO to Pinpoint Test D .

• Flash code 5

• Speed control servo.

• INSTALL a new speed control servo. REFER to Actuator - Speed Control Servo . TEST the system for normal operation.

• The speed control is inoperative - no flash codes

• CJB Fuse 10 (7.5A).
• Circuitry.
• BPP switch.
• Speed control actuator switches (9D743).
• Anti-lock brake control module.
• Speed control servo.

• GO to Pinpoint Test E .

• The speed control does not disengage when the clutch is applied

• BPP switch.
• CPP switch (M/T).
• Circuitry.

• GO to Pinpoint Test F .

• The speed control switch is inoperative - COAST

• Speed control actuator switch.
• Speed control servo.

• GO to Pinpoint Test G .

• The speed control switch is inoperative - SET/ACCEL

• Speed control actuator switches.
• Speed control servo.

• GO to Pinpoint Test H .

• The speed control switch is inoperative - RESUME

• Speed control actuator switch.
• Speed control servo.

• GO to Pinpoint Test J .

• The speed control switch is inoperative - OFF

• Speed control actuator switch.
• Speed control servo.

• GO to Pinpoint Test K .

• The speed control indicator lamp is always on

• Circuitry.
• Speed control servo.
• Instrument cluster.

• GO to Pinpoint Test L .

• The speed control indicator is inoperative

• Circuitry.
• Bulb.
• Instrument cluster.
• Speed control servo.

• REFER to Section 413-01 .

• The set speed fluctuates

• Anti-lock brake control module.
• Speed control servo.
• Speed control actuator switch.
• Circuitry.
• Speed control actuator cable.

• GO to Pinpoint Test M .

• Engine (6007).

• REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. REPAIR engine as necessary.

Water depth should show automatically on your sonar page.
if it does not then either you have selected "stop sonar" under your sonar options or you have opted to turn off the depth displayou so the numbers don't show up.
if you areally viewing your GPS or split screen sonar/GPS page, sometimes the depth display is not visible on these pages unless you specifically instruct the unit to display it.
Lowrance HDS 5 Gen2 Fishfinder GPS Chartplotter
Here is a link to Lowrance where you can download a pic version of the operators manual.
Go to page 11 "overlay data" this will give you a step by step of how to add data or readouts to different screens.

Call our customer service group and they will be able to help you out. Our number is 800-633-1468.

Joby @ Humminbird

Murray,

Has the DSM and the E120 software been upgraded to the latest software: 4.12 for the DSM and 5.52 for the E120?

Try this first. You can download the software off Raymarine.com and burn each to a separate compact flash card.

I have seen many problems like you are experiencing solved with this simple change.

If this doesn't solve the problem, the DSM will have to go back to Raymarine for repair.

I know this is an old question but just ran across it. The 1833C/NT is a radar and chart plotter. It requires the external and optional black box sounder to have depth recorder functionality.

Is your boat trailered or docked? I would try cleaning off the transducer and readjusting it.

If you have no chart card for your local area, you definitely need one! As far as getting various data on the screen, as long as it is available on the system, you can display different kinds of data by pressing the "data" button and then following the steps to add data to your readout.

Does this occur at any depths...over 20ft even.

The X510c will have problems keeping depth in shallow water...especially if it is muddy, weedy down there.

If the problem occurs even in depth over 20ft, then try resetting the unit:

1. Turn unit off
2. Press and hold ZIN, ZOUT, and PWR until you see the depth (flashing or not) in the top left corner.

If the problem still occurs, make sure the transducer is clean and still mounted so that it is sending the signal straight down to the bottom.

If the problem still occurs, make sure the power is good. You can have the voltage displayed on the screen through the overlay data menu.

Does the problem occur at any speed? If the problem clears up when you stop or slow down, the problem is due to cavitation and the transducer will need to be moved to a location where it is in a smooth flow of water at all speeds.

If none of this helps, there may be a malfunction with the X510c. You can try to update it but you will need to get the software update from someone at Lowrance support and then find a way to connect your X510c to a Lowrance unit that has a memory card slot via a NMEA 2000 network. I can help you with this if you need.

Other than that you can have the X510c returned to the factory for service.

I would verify that your "chart speed" is set to 100%.

Triton72