DAHUA PTZ 25X HDCVI SD49225DB-HC 2MP Full HD 25x Zoom Starlight Nigh Vision IP66 Infrared 100meter CCTV CAMERA Repair Replace

⭐ DAHUA PTZ 25X HDCVI SD49225DB-HC – 2MP Full HD PTZ Camera Repair & Replacement in Singapore

Looking for professional repair, servicing, or replacement of your Dahua PTZ 25X HDCVI SD49225DB-HC 2MP camera in Singapore?
CHOICECYCLE CCTV provides fast, reliable, and affordable technical support for all Dahua PTZ models including the popular SD49225DB-HC 25x Optical Zoom Starlight PTZ.

This rugged Full HD PTZ camera is widely used in commercial, industrial, warehouse, and outdoor environments due to its 100-metre IR night vision, powerful 25x zoom, and IP66 weatherproof durability. When it fails, loses focus, or stops rotating, your entire security system is affected — and that’s where we come in.

🔧 Common Issues with Dahua SD49225DB-HC That We Repair

Our engineers specialise in troubleshooting:

✔ PTZ motor failure / camera not rotating
✔ Zoom motor stuck or not focusing
✔ Blurry or unclear day/night image
✔ HDCVI signal interference / no display
✔ Water ingress, moisture, lens fogging
✔ Camera rebooting repeatedly
✔ Power supply / lightning / surge damage
✔ IR LED not turning on at night
✔ Rusted brackets / loose mounting
✔ Torn or damaged PTZ cables

We repair onsite at your premises or provide 1-for-1 replacement when parts are no longer available.

🎯 Dahua SD49225DB-HC 25X PTZ Camera Key Features

This PTZ camera remains one of Dahua’s most dependable HDCVI solutions:

• 2MP Full HD Resolution (1080P)
• 25X Optical Zoom for long-range clarity
• Starlight Low-Light Technology for brighter night images
• 100m IR Night Vision using powerful infrared LEDs
• 360° Endless Pan / 90° Tilt Range
• HDCVI Transmission up to 700m over coaxial
• Wide Dynamic Range (WDR)
• IP66 Weatherproof Housing
• Ideal for factories, warehouses, carparks, buildings & perimeters

If your unit is outdated or beyond repair, we offer upgrade options to HD-CVI 4MP/5MP/8MP PTZ models or IP PTZ equivalents with AI analytics.

🛠 Why Choose CHOICECYCLE CCTV for Dahua PTZ Repair or Replacement?

We are one of Singapore’s established CCTV specialists with:

• Over 15 years experience in PTZ repair, replacement & configuration
• Expertise in Dahua, Hikvision, Hanwha Wisenet, Uniview PTZ systems
• Support for both HDCVI and IP PTZ technologies
• Full onsite diagnosis, motor testing, lens calibration & cabling checks
• Fast turnaround time for commercial & government sites
• Stock for replacement PTZ cameras, power supplies & brackets
• Optional cloud backup storage & remote monitoring setup
• 0% UOB Credit-Card Instalment for upgrades (Singapore only)

Whether you need a quick fix or a full system upgrade, our technicians ensure your security system works reliably 24/7.

💡 When Should You Replace Instead of Repair?

Replacement is recommended when:

• Camera is over 5–7 years old
• PTZ motor parts are discontinued
• Severe water damage or lightning burn
• Image sensor is failing or noisy
• IR LEDs fully damaged
• You wish to upgrade to AI-enabled PTZ or 4MP/8MP resolutions

We will assess and advise the most cost-effective solution.

📞 Contact Us for Dahua PTZ SD49225DB-HC Repair or Replacement in Singapore

Looking for trustworthy support? We provide same-day onsite service.

CHOICECYCLE CCTV Pte Ltd
📱 WhatsApp: +65 9853 4404
📧 Email: enquiry@choicecycle.com.sg
🌐 Website: https://sgcctv.com.sg
📍 Sim Lim Square #02-81 (Project Sales & Technical Support)

DAHUA PTZ 25X HDCVI SD49225DB-HC 2MP Full HD 25x Zoom Starlight Nigh Vision IP66 Infrared 100meter CCTV CAMERA Repair Replace

🔧 How to Install & Configure Dahua PTZ SD49225DB-HC (25X HDCVI 2MP)

Complete Step-by-Step Setup Guide

The Dahua SD49225DB-HC is an HDCVI-based PTZ dome camera that uses coaxial cabling and supports up to 700m transmission. Installation requires correct mounting, power supply, PTZ control wiring, and DVR configuration.

Below is the complete workflow.

🛠 Tools & Items Required

• Dahua SD49225DB-HC PTZ Camera

• 24V AC power supply (or as specified)

• Coaxial cable (RG59) & BNC connectors

• PTZ control wires (RS485 A/B)

• Dahua HDCVI DVR (XVR recommended)

• Drill, screws, wall plugs

• Network tester (optional)

• Surge protection device (recommended)

1️⃣ Mounting the Dahua PTZ Camera

1. Choose a stable surface: wall, ceiling, pole, or bracket.

2. Ensure full 360° pan clearance (no obstruction).

3. Mark the drilling points using the mounting plate.

4. Install anchors, screws, and bracket.

5. Mount the camera securely and tighten the locking screws.

Important: PTZ cameras must be firmly mounted — any vibration will affect zoom/focus.

2️⃣ Cabling & Power Connection

✔ A. Video Cable (HDCVI)

• Use coaxial RG59 with BNC connectors.

• Connect camera → BNC → DVR video input.

✔ B. Power

• The SD49225DB-HC uses 24VAC.

• Connect 24VAC+ and 24VAC- from power adapter to camera input.

• Avoid sharing power with other heavy-load devices.

✔ C. PTZ Control Wiring (RS485)

• Connect RS485 A → DVR A

• Connect RS485 B → DVR B

• Use twisted-pair cable (Cat5/6 pair is fine).

Polarity matters — wrong polarity = PTZ not moving.

DAHUA PTZ 25X HDCVI SD49225DB-HC 2MP Full HD 25x Zoom Starlight Nigh Vision IP66 Infrared 100meter CCTV CAMERA Repair Replace

3️⃣ DVR Configuration (Dahua XVR / HDCVI DVR)

Step 1: Add the HDCVI Channel

1. Go to Menu > Camera > Channel Type

2. Ensure the BNC port used is set to HDCVI

Step 2: Enable PTZ Settings

1. Open Menu

2. Select Setting > PTZ

3. Choose the PTZ channel

4. Set:

If the customer already changed the PTZ address, match accordingly.

Step 3: Test PTZ Control

1. Open Live View

2. Right-click and select PTZ Control

3. Test:

   • Up / Down

   • Left / Right

   • Zoom In / Out

   • Focus

   • IR & Preset functions

If the camera does not respond:

• Re-check RS485 A/B polarity

• Confirm “Dahua Protocol + Baud Rate 9600”

• Ensure power supply is stable

4️⃣ Set Presets & Tour Functions

Set a Preset

1. Go to PTZ Control

2. Aim the camera (Zoom + Focus)

3. Click Preset

4. Choose a preset number (1–80)

5. Save

Create an Auto-Tour

1. Go to PTZ > Tour

2. Add preset points in sequence

3. Set speed

4. Save

5. Click Start Tour

Use cases:
✔ Perimeter patrol
✔ Carpark sweeping
✔ Warehouse monitoring

5️⃣ Optimize Image Settings

Go to Camera > Image:

• Brightness: 45–55

• Contrast: 35–45

• Sharpness: 40–55

• WDR: Enable for backlight environments

• DNR: Enable for low-light noise reduction

• Day/Night: Auto

For outdoor lighting variations, enable Starlight Mode.

6️⃣ Night Vision & IR Settings

The SD49225DB-HC supports up to 100m IR distance.

Set under Camera > Conditions:

• IR Mode: Auto

• Smart IR: ON

• Exposure: Auto / Slow Shutter for very dark areas

If IR is not switching:

• Check photocell sensor

• Verify power supply cannot drop under load

7️⃣ Maintenance Checklist

✔ Clean dome bubble
✔ Check bracket bolts every 6–12 months
✔ Inspect RS485 terminal and coax connectors
✔ Test zoom/focus motor
✔ Update DVR firmware
✔ Replace lightning/surge protector yearly

💡 Professional Tip

If the PTZ is installed outdoors:
Install a surge protector on both power & coaxial lines.
PTZ motors are sensitive to lightning spikes.

📞 Need Installation or Configuration Help in Singapore?

CHOICECYCLE CCTV provides:

✔ Dahua PTZ installation
✔ PTZ repair & replacement
✔ DVR configuration
✔ Cabling & power upgrade
✔ Surge protection setup
✔ Maintenance contracts

Contact Us:
📱 WhatsApp: +65 9853 4404
📧 enquiry@choicecycle.com.sg
🌐 https://sgcctv.com.sg
📍 Sim Lim Square #02-81

DAHUA PTZ 25X HDCVI SD49225DB-HC 2MP Full HD 25x Zoom Starlight Nigh Vision IP66 Infrared 100meter CCTV CAMERA Repair Replace