This document is a service manual for an LCD/LED TV, specifically model LED 32, which uses the AS-TSUMV59XUS-LE1 chassis. It provides comprehensive information for servicing, maintenance, and software upgrades.
Function Description:
The device is an LCD/LED television, model LED 32, designed for displaying video and audio content from various sources. It supports multiple broadcasting systems and input types, making it versatile for different regions and usage scenarios. The television incorporates a main IC (U06) for core processing, along with various other components for video, audio, and control functions.
Important Technical Specifications:
General Specifications:
- Model: LED 32
- Chassis: AS-TSUMV59XUS-LE1
- Input Voltage: 100-240V~, 50/60Hz (Standard: 240V, 50Hz)
- Screen Size: 32 inch Wide (1366 x 768)
- Aspect Ratio: 16:9
- Module: HV320WX2-201
- Operating Environment:
- Temperature: 0~40 deg C
- Humidity: ~80%
- Storage Environment:
- Temperature: -20~60 deg C
- Humidity: ~85%
Broadcasting System & Channel:
- Broadcasting System: PAL-BG
- Available Channels:
- VHF: 00 ~ 12
- UHF: 20 ~ 75
- CATV: 02 ~ 44
- Tuner IF:
- PAL: 38.90MHz (Picture)
- 34.40MHz (Sound)
Chrominance & Luminance Specification:
- White Peak Brightness: Min 300 cd/m², Typ 350 cd/m² (HV320WX2-201)
- Contrast Ratio: 1000:1 (N/A)
- Brightness Uniformity: 72% (Full white)
- Color Coordinate (Typ):
- RED: X 0.630, Y 0.340
- GREEN: X 0.300, Y 0.630
- BLUE: X 0.148, Y 0.068
- WHITE: X 0.280, Y 0.290
- Color Coordinate Uniformity: N/A (HV320WX2-201)
- Color Temperature:
- Cool: 9500
- Medium: 8700 (HDMI input, 85% Full white pattern)
- Warm: 6200
- Color Distortion, DG: 10.0%
- Color Distortion, DP: 10.0 deg
- Color S/N, AM/FM: 43 dB
- Color Killer Sensitivity: -80 dBm
The manual lists various resolutions and their corresponding H-freq, V-freq, and remarks (SDTV, DVD, HDTV). Examples include:
- 720x480: 15.73 kHz, 60 Hz (SDTV, DVD 480i)
- 1920x1080: 33.75 kHz, 60 Hz (HDTV 1080i)
Similar to component video, various resolutions are supported with corresponding H-freq, V-freq, pixel clock, and remarks (VESA, WXGA, WUXGA). Examples include:
- 640x480: 31.469 kHz, 59.94 Hz, 25.17 MHz (VESA, Input 848480 60Hz, --> 640480 60Hz Display)
- 1920x1080: 66.647 kHz, 59.988 Hz, 138.625 MHz (WUXGA)
HDMI input supports a wide range of resolutions for both PC and DTV, with HDCP support. Examples include:
- 720x400: 31.468 kHz, 70.08 Hz, 28.321 MHz (HDCP)
- 1920x1080: 67.500 kHz, 60 Hz, 148.500 MHz (HDCP)
Usage Features:
Access to the factory setting menu is available by pressing "MENU+710" on the remote. This menu allows for advanced adjustments and configurations:
- ADC ADJUST: Adjusts color temperature for VGA or YPBPR sources. Includes R/G/B Gain and Offset, and an Auto ADC function for striped signals (Ypbpr) or black and white signals (VGA).
- PICTURE MODE: Adjusts picture parameters like Contrast, Color, Sharpness, Tint, Dynamic Backlight, and Brightness. Offers Standard, Mild, User, and Dynamic modes.
- W/B ADJUST: White balance adjustment for TV, AV, YPbPr, VGA, and HDMI sources. Includes R/G/B Gain and Offset. A "COPY ALL" function allows applying current channel settings to all channels.
- SSC (Spread Spectrum Clock): Screen parameter adjustment.
- SPECIAL SET: Includes various settings such as 2HOUR OFF, WDT (Watchdog Timer), WHITE PATTERN (for display testing), RESET DEFAULT (factory and OSD menu reset), NO SIGNAL SCREEN (blue/black), AGING MODE, POWER (boot mode), Move, and Logo Switch.
- VIF1: Parameters adjustment specifically for TV mode, including AFEC_D4, AFEC_D5, AFEC_D8, AFEC_D9, AFEC_A0_A1, AFEC_66, AFEC_6E, AFEC_D7_LOW_BOUND, AFEC_D7_HIGH_BOUND, AFEC_43, AFEC_44, AFEC_CB, AFEC_CF_BIT2, AFEC_CE_BIT7, and AFEC_4F.
- SW INFORMATION: Displays software information, build time, MIU0 DQSD, and MIU0 DQS1.
- UART DEBUG: Controls debug tool using COM port to read registers on and off.
- OVERSCAN: Adjusts overscan resolution, horizontal/vertical position, and horizontal/vertical size.
- NONLINEAR: Analog nonlinear adjustment for various picture and audio parameters, including Brightness Curve, Contrast Curve, Saturation Curve, Hue Curve, Sharpness Curve, Volume Curve, Treble, Bass, and EQ.
- SOFTWARE UPDATE (USB): Allows software updates via USB. If no USB is inserted, it will display "Can't Detect USB".
- RESET DEFAULT: Resets factory and OSD menu settings.
- BUILD TIME: Displays the software compiler time.
- PANEL CONTROL: Adjusts panel-related settings such as Panel ID Sel, LVDS TI MODE (low pressure differential signal output model, TI and JEDIA), LVDS Depth (8BIT/6BIT/10BIT), LVDS Swap Port, and LVDS Swap Polarity.
Troubleshooting:
The manual includes flowcharts for troubleshooting common display issues:
- TV/CATV doesn't display: Guides through checking U10 Pin12/13 (VIF), U06 output, and power lines.
- AV doesn't display: Guides through checking CN23, Main IC (U06) input/output, and power lines.
- Component doesn't display: Guides through checking CN23, Component RGB switch (U06) input/output, and power lines.
- RGB PC doesn't display: Guides through checking CN09, RGB Video switch (U06) input/output, RGB Audio switch (U06) input/output, Main IC (U06) output, and power lines.
- HDMI doesn't display: Guides through checking CN13/CN15 input, DDC communication lines, HDCP communication lines (U07), Main IC (U06) output, and power lines.
Maintenance Features:
Safety Precautions:
- Always unplug the AC power cord before servicing.
- Use appropriate high voltage meters.
- Do not spray chemicals on the receiver.
- Clean electrical contacts with a 10% Acetone and 90% isopropyl alcohol mixture (flammable).
- Do not defeat B+ voltage interlocks.
- Ensure all solid-state device heat sinks are correctly installed.
- Connect test receiver ground lead to chassis ground first, remove last.
- Use specified test fixtures.
Servicing Precautions:
- Electrostatically Sensitive (ES) Devices: Use techniques to reduce static electricity damage, such as wearing a wrist strap, working on a conductive surface, and storing ES devices in conductive containers.
- General Soldering Guidelines: Use a grounded-tip, low-wattage soldering iron. Avoid excessive heat. Clean contacts with a wire-bristle brush.
- IC Removal/Replacement: Carefully remove damaged copper pattern, clean soldered areas, and insert replacement IC.
- "Small-Signal" Discrete Transistor Removal/Replacement: Clip leads, bend into "U" shape, connect replacement leads, crimp, and solder.
- Power Output, Transistor Device Removal/Replacement: Heat and remove solder, remove heat sink, replace transistor, solder leads, and re-install heat sink.
- Diode Removal/Replacement: Clip leads, bend remaining leads, wrap new diode leads, crimp, and solder, observing polarity.
- Fuse and Conventional Resistor Removal/Replacement: Clip leads, crimp replacement component, and solder, maintaining original spacing.
- Circuit Board Foil Repair:
- At IC Connections: Remove damaged copper, scratch away solder resist, bend jumper wire, crimp around IC pin, solder, and route along the pattern.
- At Other Connections: Remove damaged copper, trace pattern break, connect insulated 20-gauge jumper wire between nearest components, crimp, and solder. Ensure jumper wire does not touch components or sharp edges.
Software Upgrade:
- Use the "Mstar ISP Utility" program.
- Connect the computer to the TV, set parameters (Port Type, Speed, Base Addr, SPI Setting, etc.), and perform "Auto Detect" or "Connect".
- Load the download file (MST_V59.bin) by clicking "Read".
- Follow the on-screen instructions to complete the upgrade process.
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