This document describes the Changhong LED32C2000H, LED32C2000H/2, and LED32C2200H LED TVs, focusing on their operation, features, and maintenance.
Function Description
The Changhong LED TVs are designed for home entertainment, offering a range of functionalities for viewing television programs, playing media from external devices, and interacting with teletext services. They support both analog (ATV) and digital (DTV) television signals, including DVB-C for cable and DVB-T for terrestrial broadcasts. The TVs feature an intuitive On-Screen Display (OSD) menu system for configuring various settings, from picture and sound adjustments to channel management and parental controls.
A key feature is the USB mode, which allows users to play multimedia files (photos, music, movies, and text) directly from a USB storage device. The PVR (Personal Video Recorder) function, available in DTV mode, enables recording of digital programs to a USB disk, including time shift capabilities. The TVs also incorporate MHEG5 (Multimedia and Hypermedia information coding Expert Group) for interactive services, depending on regional broadcasting standards.
For specific environments like hotels, a "Hotel Mode" is available, which allows administrators to set default source, channel, and volume levels, and lock certain functions to prevent unauthorized changes.
Important Technical Specifications
The models LED32C2000H, LED32C2000H/2, and LED32C2200H share several core specifications:
- Screen Size: 31.5 inches (80cm)
- Aspect Ratio: 16:9
- WXGA Resolution: 1366x768
- Maximum Color: 16.7M
- Video System: PAL/SECAM
- Audio System: B/G, D/K, I, L
- Nominal Voltage: 100-240V~50/60Hz
- Standby Power Consumption: ≤0.5 W
- USB Support: 1 port
- CI Slot: Yes
Key differences between models include:
- Brightness: LED32C2000H and LED32C2200H offer 250 cd/m², while LED32C2000H/2 offers 200 cd/m².
- Contrast Ratio: LED32C2000H and LED32C2200H have a 3000:1 contrast ratio, whereas LED32C2000H/2 has 1200:1.
- Response Time: LED32C2000H and LED32C2200H have a 6.5ms response time, while LED32C2000H/2 has 6ms.
- HDMI Inputs: LED32C2000H and LED32C2200H feature 3 HDMI inputs, while LED32C2000H/2 has 2.
All models include 1 RF (75Ω) input, 1 AV input, 1 Component YPbPr input, 1 SCART input, 1 PC Audio input, 1 VGA (D-Sub 15 pin) input, and 1 Digital Audio output.
Usage Features
Basic Operation:
- Power On/Off: The TV can be turned on from standby mode using the power button on the remote control. It automatically turns off after 5 minutes in TV/DTV mode or 16 seconds in PC-RGB mode if no signal is detected.
- Channel Selection: Channels can be selected using CH+/CH- buttons or by entering digits (0-9) on the remote.
- Volume Adjustment: Volume is controlled via VOL+/- buttons. A mute function is also available.
- Input Source: The SOURCE button allows cycling through available input sources (TV, DTV, AV, Component, VGA, HDMI, USB).
Menu Operation:
The main menu is accessed via the MENU button and navigated using directional and ENTER buttons.
- CHANNEL Menu:
- Auto Tuning: Automatically scans and stores available channels (TV, DTV, Radio, Data) based on selected country and tune type (Air or Cable).
- DTV Manual Tuning: Manually stores digital channels by selecting a channel and initiating a search.
- CADTV Manual Tuning: For DVB-C cable mode, allows manual input of Frequency, Symbol (ks/s), and QAM Type for correct program addition.
- ATV Manual Tuning: Manually stores analog channels.
- Programme Edit: Allows users to delete, rename, move, skip, or set favorite channels.
- CI Information: Provides access to encrypted services (pay services) via a PCMCIA CI card.
- PICTURE Menu:
- Picture Mode: Predefined picture settings (e.g., Home) and a "User" mode for custom adjustments (Contrast, Brightness, Saturation, Sharpness, Tint).
- Colour Temp: Adjusts the color temperature of the picture.
- Aspect Ratio: Selects the picture size to fit viewing requirements.
- DNR (Digital Noise Reduction): Reduces screen noise.
- Screen (PC-RGB mode): Auto Adjust, H/V Position, Size, and Phase adjustments for PC input.
- SOUND Menu:
- Sound Mode: Predefined sound settings (e.g., Standard) and a "User" mode for custom Treble and Bass adjustments.
- Balance: Adjusts the sound balance between speakers.
- AVL (Auto Volume Level): Automatically maintains a stable volume level across different programs/channels.
- SRS TruSurround HD: Enhances surround sound experience.
- AD Switch (Audio Description): Provides an auxiliary audio track for visually challenged persons in DTV mode.
- TIMER Menu:
- Clock: Displays DTV signal time or allows setting system time.
- Off Time/On Time: Sets scheduled power off/on times.
- Sleep: Sets a timer for automatic standby mode.
- Auto Sleep: Automatically enters standby mode after a set period of inactivity (default 4 hours).
- Time Adjust/Time Zone: Adjusts time and time zone settings.
- OPTION Menu:
- Language: Selects OSD language.
- Audio Language/Subtitle Language: Selects preferred audio and subtitle languages (for digital channels with multiple language broadcasts).
- Hearing Impaired: Displays information for hearing-impaired viewers when enabled.
- Country: Displays the current country.
- PVR File System: Manages USB disk for PVR functions (Select Disk, Check PVR File System, USB Disk status, Format, Time Shift Size, Speed, Free Record Limit).
- Default: Restores factory settings.
- E-POP: Optimal setting for store environments, resets image quality after a period if modified.
- Health Remind: Prompts users to take a break every two hours.
- LOCK Menu:
- Lock System: Prevents unauthorized operation with a 4-digit password (default 0000).
- Set Password: Allows setting a private password.
- Block Program: Locks/unlocks specific programs in ATV/DTV mode.
- Parent Lock: Restricts viewing of adult programs based on rating limits in DTV mode.
USB Mode:
- Access/Quit: Connect a USB device, then select USB as the input source.
- Supported Formats: JPEG, BMP, PNG for photos; MP3, AAC for music; AVI, VOB, DAT, MPEG-1/MPEG-2/MPEG-4, TS/TP for movies; TXT for text files.
- Operation: Navigate files/folders, play selected media, stop playback, fast forward/reverse, previous/next file, delete files, and page up/down in file lists.
- PVR Functionality: Records digital programs to a USB disk. Supports time shift, record list management (play, delete, sort), and requires a minimum 512MB USB disk (USB2.0 high-speed specification recommended). FAT32 format with single files not exceeding 4GB is recommended for external disks.
MHEG5:
- Provides interactive services (country-dependent). Accessed via red button or specific teletext button. Subtitles must be off.
Teletext:
- Display: Enters teletext mode, with options for Mix mode (superimposing teletext over TV program) and normal TV/DTV mode.
- Page Selection: Enter 3-digit page numbers or use CH-/CH+ for preceding/following pages.
- Hold: Freezes a teletext page.
- Index: Direct access to the main index page.
- Enlarging Text: Doubles text size for easier reading (top half, bottom half, or normal display).
- Reveal Mode: Shows/hides concealed teletext information.
- Subpage: Accesses sub-pages within teletext.
- Color Buttons: Direct access to corresponding color pages displayed at the bottom of the teletext screen.
Maintenance Features
Cleaning:
- Screen: Use a soft cloth dampened with lukewarm water and a small amount of fabric softener or dishwashing detergent. Wring the cloth until almost dry, then wipe the screen. Ensure the screen is dry before turning the TV on.
- Cabinet: Wipe with a soft, dry, lint-free cloth. Avoid wet cloths.
General Advice:
- Extended Absence: Unplug the power cord during long periods of non-use (e.g., vacation) to protect against lightning or power surges.
- Power Cord: Protect the power cord from physical or mechanical abuse (twisting, kinking, pinching, walking on). Always hold the insulated part of the plug when unplugging.
- Ventilation: Maintain at least 4 inches of distance from walls and other objects to ensure proper ventilation and prevent overheating. Do not block ventilation openings.
- Liquid/Flame: Do not expose the apparatus to dripping or splashing liquids, and do not place objects filled with liquids (e.g., vases) on it. Keep naked flame sources (e.g., lighted candles) away from the apparatus.
- Battery Disposal: Dispose of used batteries environmentally responsibly; do not throw them in regular trash.
- Static Images: Avoid displaying still images or extremely bright images for extended periods to prevent screen damage.
- Screen Touch: Avoid touching the screen or holding fingers against it for long periods, as this may cause temporary distortion.
Troubleshooting Guide:
The manual provides a comprehensive troubleshooting guide for common issues, including:
- No sound/picture
- Picture but no sound
- Remote control not working
- Sudden power off
- Slow picture appearance
- Poor color/picture
- Horizontal/vertical bars or picture shaking
- Poor reception
- Lines/streaks in pictures
- No speaker output
- VGA mode issues (signal out of range, vertical bars, unstable color)
For persistent problems, users are advised to unplug the TV and contact service personnel.
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