Humminbird LCR100 Operations Manual

Introduction: How the LCR-100 Works

The Humminbird LCR 100 system comprises a transducer (beneath the boat) and the LCR 100 unit (in-dash or gimbal-mounted), communicating via cable and powered by the boat's 12V DC battery.

Using sonar principles, the LCR 100 detects underwater objects. It sends signals to the transducer, which emits ultrasonic signals. Echoes returning from objects or the bottom are converted back to electronic signals for display. The screen shows depth, fish, and bottom details, updating continuously.

Diagram: Transmitted Signal - Shows transducer emitting downward waves.

Diagram: Echo Signal - Shows waves reflecting off the bottom and returning.

Controls allow setting depth range, display speed/sensitivity, alarms, and zoom view.

The Humminbird Advantage

The LCR 100 offers advanced features, including a high-contrast, super-twist LCD for clear viewing in sunlight and at night. Its viewing angle is wider than standard LCDs.

The unit is robust, waterproof (including saltwater-proof), and designed for reliable operation in demanding conditions.

Using the Built-in Simulator

A built-in simulator helps users learn LCR 100 functions by displaying a typical underwater scene and allowing control practice.

To activate: Turn unit OFF. Press and hold [POWER] until a chirp sounds. Release button.

Diagram: Actual View - Simplified underwater scene.

Diagram: LCR-100 Display - Typical sonar screen.

To exit: Turn unit OFF. Sensitivity is disabled in simulator mode.

Operating the LCR-100

Front panel buttons adjust LCR 100 functions. Press buttons fully for a "chirp" sound.

[POWER]: ON/OFF. Hold for 2 sec (off) to start simulator.

[STOP]: Freeze/resume display.

[SELECT]: Access functions: Sensitivity/Units, Bottom Alarm, Fish Alarm, Zoom, Bottom Lock, Display Speed, Depth Range.

Adjust functions using arrow buttons and [ON-OFF]. The last selected function remains active for easier adjustments.

Diagram: Front Panel Buttons - Illustrates POWER, STOP, SELECT, ON-OFF.

Function Adjustments

1. 1. Sensitivity/Units

   Factory: +0/FEET

   Adjusts sensitivity (range +5 to -5) and selects depth units (feet/meters) via [ON-OFF].

   Diagram: Sensitivity Setting - Screen for adjusting sensitivity and units.

2. 2. Bottom Alarm

   Factory: OFF

   Sets minimum depth alarm. Select B ALM, press [ON-OFF], adjust depth with arrows. Alarm symbol ? appears when active.

   Diagram: Bottom Alarm Setting - Screen for alarm depth and activation.

3. 3. Fish Alarm

   Factory: OFF

   Alerts with chirp when fish detected. Select FISH ALM, press [ON-OFF]. Fish symbol ? appears when active.

   Diagram: Fish Alarm Setting - Screen for fish alarm activation.

4. 4. Zoom

   Factory: OFF

   Provides close-up view. Select ZOOM, press [ON-OFF]. Adjust zoom depth with arrows. Range varies by Depth Range setting.

   Diagram: Zoom Function - Screen for zoom depth adjustment.

5. 5. Bottom-Lock

   Factory: OFF

   Zooms to track the bottom. Select BTM LOCK, press [ON-OFF]. Ideal for structure/fish near bottom.

   Diagram: Bottom Lock Function - Screen for bottom lock activation.

6. 6. Display Speed

   Factory: One level below maximum

   Adjusts screen update speed (faster/slower) using Up/Down arrows. Faster speeds give quicker updates, slower speeds more detail.

   Diagram: Display Speed Adjustment - Screen for adjusting display speed.

7. 7. Depth Range

   Factory: ON (Automatic)

   Auto mode sets ideal depth range (up to 480'/150m). Manual mode allows setting range up to 600'/185m via arrows after selecting RANGE and pressing [ON-OFF]. Manual mode shows "second return" for bottom hardness indication.

   Diagram: Depth Range Setting - Screen for depth range selection.

Maintenance and Troubleshooting

The LCR 100 requires minimal maintenance. Wipe with a damp cloth for spray contact. Clean LCD with a chamois and non-abrasive cleaner. Clean transducer face with liquid detergent if oily.

Allow transducer to re-wet after prolonged submersion. Avoid extreme temperatures.

Repairs must be done by authorized Humminbird technicians. Consult troubleshooting before contacting service.

Troubleshooting Guide:

1. No power: Check power cable connection and fuse. Ensure correct battery terminal connection (+/-).
2. No bottom reading: Check transducer cable connection. Ensure transducer is submerged.
3. Gaps/Scale change in shallow water: Normal in depths <1 ft; auto range control may struggle.
4. Unit powers on/off incorrectly: Check transducer cable for damage/shorts. Repair with electrical tape if needed.
5. Gaps at high speeds: Transducer may be mounted too high, causing air/bubbles. Consult dealer.
6. Black dots at high speed/sensitivity: Transducer too close to propeller; affected by air bubbles. Move transducer away.
7. Bottom reading disappears on hard turn: Normal; transducer momentarily out of water.
8. Screen fading/unclear: Check battery charge; unit needs >11 volts.

Warranty and Service

One-Year Full Warranty: Covers repairs (excluding physical damage) for the first year. Customer responsible for shipping.

Limited Service Charge: Post-warranty repairs have a maximum service charge (excluding physical damage/missing parts).

Repairs performed by factory-trained technicians.

Service policy valid in the U.S. for units returned to Eufaula, Alabama factory. Subject to change.

TECHSONIC INDUSTRIES, INC. will repair units failing within one year of purchase at no charge, except for lost parts, physical damage, and transportation.

THIS IS A FULL WARRANTY AS DEFINED BY THE FEDERAL WARRANTY ACT, EFFECTIVE JULY 4, 1975.

For factory service, send unit with a note describing the problem to:

Techsonic Industries, Inc.
Service Department
Three Humminbird Lane
Eufaula, Alabama 36027

Out-of-warranty units returned C.O.D. Include payment if applicable.

Technical Specifications

• Operating Frequency: 200 KHz
• Power Requirement: 12 volts
• Power Cable Length: 48"
• Transducer (standard): XHS-6-16
• Transducer Cone Angle: 16 degrees
• Depth Ranges (Feet): 0-15, 30, 60, 120, 180, 240, 360, 480 (0-600 manual)
• Depth Ranges (Meters): 0-6, 9, 15, 30, 45, 75, 105, 150 (0-185 manual)
• Zoom Ranges (Feet): 7 1/2, 15, 30
• Zoom Ranges (Meters): 3, 5, 10
• Unit Construction: High-impact polycarbonate
• Unit Dimensions: 6"W x 4 3/4"H x 2"D (15.2cmW x 12.1cmH x 5.1cmD)
• Display: Super-twist liquid crystal
• Viewing Area: 2 7/16"W x 2 5/8"H (6.3cmW x 6.6cmH)
• Matrix Configuration: 32 x 46 pixels

Questions? Call Customer Service Hotline: Mon-Fri, 8 a.m. - 5:00 p.m. CT (U.S./Canada).