This document provides a comprehensive service manual for the Panasonic TH-55DX650K, TH-55DX650M, and TH-55DX650S LED TV models, all sharing the KM30 chassis. The manual is intended for experienced repair technicians and emphasizes safety precautions, particularly regarding electrostatic discharge (ESD) and lead-free solder.
Function Description
The Panasonic TH-55DX650K/M/S series are LED TVs designed for home entertainment, offering a range of features for viewing various content sources. They support multiple analog and digital broadcast systems, as well as external inputs for video, audio, and data. The TVs are equipped with smart functionalities, indicated by the presence of an Ethernet port and built-in wireless LAN. A "Hotel mode" is also available, allowing for restricted functionality in hospitality environments.
Important Technical Specifications
- Model Numbers: TH-55DX650K (Malaysia), TH-55DX650M (Middle East), TH-55DX650S (Singapore)
- Chassis: KM30
- Dimensions (W x H x D):
- With Pedestal: 1244 mm x 776 mm x 364 mm
- TV only: 1244 mm x 723 mm x 69 mm
- Mass:
- With Pedestal: 20.0 kg Net
- TV only: 18.0 kg Net
- Power Source:
- TH-55DX650K/S: AC 220-240 V, 50 / 60 Hz
- TH-55DX650M: AC Auto 110-240 V, 50 / 60 Hz
- Rated Power Consumption:
- TH-55DX650K/S: 182 W
- TH-55DX650M: 185 W
- Standby Power Consumption: 0.50 W
- Visible Screen Size (diagonal): 139 cm
- Display Resolution: 3840 (W) x 2160 (H) (4K resolution)
- Panel Type: LED backlight Liquid Crystal Display
- Speaker Output: 20 W (10 W + 10 W)
- Connection Terminals:
- AV IN (COMPONENT / VIDEO):
- VIDEO: RCA PIN Type x 1, 1.0 V[p-p] (75 Ω)
- AUDIO L - R: RCA PIN Type x 2, 0.5 V[rms]
- Y: 1.0 V[p-p] (including synchronisation)
- PB/CB, PR/CR: ±0.35 V[p-p]
- HDMI 1 / 2 / 3 Input: Type A Connectors.
- HDMI1 / 3: 4K, Content Type, Deep Colour, x.v.Colour™
- HDMI2: 4K, Content Type, Audio Return Channel, Deep Colour, x.v.Colour™ (supports 'HDAVI Control 5' function)
- ETHERNET: 10BASE-T / 100BASE-TX
- USB 1 / 2:
- USB1: DC 5 V, Max. 500 mA [Hi-Speed USB (USB 2.0)]
- USB2: DC 5 V, Max. 900 mA [SuperSpeed USB (USB 3.0)]
- DIGITAL AUDIO OUT: PCM / Dolby Digital / Fibre optic
- Receiving Systems / Band Name (17 Systems): Includes PAL (B, G, H, I, D, K), SECAM (B, G, D, K, K1, I), NTSC (M, 3.58 / 4.5 MHz, 4.43 / 5.5 MHz, 4.43 / 6.0 MHz, 4.43 / 6.5 MHz, 3.58 / 5.5 MHz, 3.58 / 6.0 MHz, 3.58 / 6.5 MHz), and PAL 60 Hz (5.5 MHz, 6.0 MHz, 6.5 MHz).
- Digital TV: 7 MHz VHF / 8 MHz UHF free-to-air TV broadcast reception.
- Receiving Channels (Analogue TV):
- VHF BAND: 2-12 (PAL/SECAM B, K1), 0-12 (PAL B AUST.), 1-9 (PAL B N.Z.), 1-12 (PAL/SECAM D), 1-12 (NTSC M Japan), 2-13 (NTSC M USA)
- UHF BAND: 21-69 (PAL G, H, I / SECAM G, K, K1), 28-69 (PAL B AUST.), 13-57 (PAL D, K), 13-62 (NTSC M Japan), 14-69 (NTSC M USA)
- CATV: S1-S20 (OSCAR), 1-125 (USA CATV), C13-C49 (JAPAN), S21-S41 (HYPER), Z1-Z37 (CHINA), 5A, 9A (AUST.)
- Aerial Input: VHF / UHF
- Operating Conditions:
- Temperature: 0°C - 35°C
- Humidity: 20% - 80% RH (non-condensing)
- Built-in Wireless LAN:
- Standard compliance and Frequency range: IEEE802.11a/n (5.15 GHz -5.35 GHz, 5.47 GHz -5.85 GHz), IEEE802.11b/g/n (2.400 GHz -2.4835 GHz)
- Security: WPA2-PSK (TKIP/AES), WPA-PSK (TKIP/AES), WEP (64 bit/128 bit)
Usage Features
- CS Maintenance Menu: This menu allows technicians to check and adjust various settings after parts exchange. It includes options for EDID Clock, DRV Check (USB HDD Drive Check), and White Balance Adjustment. Access is gained by pressing [VOLUME (-)] on the main unit and [RED] on the remote control three times within 2 seconds.
- Hotel Mode: This feature allows for restricting TV functions, useful in hospitality settings. It can be accessed by pressing [VOLUME (Down)] on the TV and [AV] three times on the remote control within 2 seconds. The menu offers controls over initial input, volume levels, button lock, remote lock, and private information settings.
- Data Copy by USB Memory: This function facilitates copying user settings, hotel mode settings, and channel scan data. It supports two scenarios:
- Board replacement: Copying data from an original A-Board to a USB memory, then to a new A-Board.
- Hotel installation: Copying data from a master TV to a USB memory, then to multiple other TVs.
- Preparation involves creating a specific
.pwd file (boardreplace.pwd or hotel.pwd) on an empty USB memory. The process involves inserting the USB, inputting a password (2770 for board replacement, 4850 for hotel), and then copying the data.
- System Information: Provides detailed software and hardware status, including SW version, model IDs, LSI package/release, NAND Flash bad block count, reboot/crash/SOS counters, power-on times, EEPROM versions, and VIERA Link version. Accessed via the [MENU] button on the remote, then selecting [? Help] and [System Information].
Maintenance Features
- Safety Precautions: Emphasizes observing original lead dress, proper installation of protective devices, and performing leakage current checks (cold and hot) after servicing. It also warns against modifying the equipment and provides guidelines for handling wiring units and Faston connectors.
- Electrostatic Discharge (ESD) Prevention: Detailed instructions are provided to prevent damage to electrostatically sensitive (ES) devices, including touching earth ground, wearing ESD wrist straps, placing assemblies on conductive surfaces, using grounded soldering irons and anti-static solder removal devices, avoiding freon-propelled chemicals, and minimizing bodily motions.
- Lead-Free Solder (PbF) Information: Notes that the TV uses PbF solder (Sn+Ag+Cu) for environmental reasons. Technicians are advised that PbF solder has a higher melting point (50-70°F / 30-40°C higher) and requires a high-temperature soldering iron (700 ± 20°F / 370 ± 10°C). Warnings are given about splashing if overheated and the need to completely remove PbF solder before applying Pb solder.
- Service Hint: Identifies key boards (A-BOARD, P-BOARD, K-BOARD) and their main devices, indicating that all are repairable.
- Measurements and Adjustments: Includes voltage charts for the A-board and P-board, specifying target voltage ranges for various test points to ensure proper operation.
- Troubleshooting Guide:
- Check of IIC bus lines: Allows technicians to check the status of IIC bus lines. Accessed by pressing [VOLUME (-)] on the main unit and [BLUE] on the remote for >3 seconds (for self-check only) or [MENU] for >3 seconds (for self-check and forced factory shipment setting). Displays status for TUNER, FRC, ETHERNET, ID, and WiFi.
- Power LED Blinking timing chart: Provides a diagnostic tool where the number of blinks of the Power LED indicates the defective block (e.g., 1 blink for BL SOS, 7 for SUB 3.3V/1.0V, 9 for SOUND SOS, 10 for FRC/NVT SOS, 13 for EMERGENCY SOS).
- LCD Panel test mode: Helps identify whether abnormal picture display is due to the LCD Panel or the A-board. Accessed by pressing [VOLUME (-)] on the main unit and [YELLOW] on the remote three times within 2 seconds. If the abnormal picture persists in test mode, the LCD panel is at fault; if it displays normally, the A-board is the cause.
- Disassembly and Assembly Instructions: Detailed steps for disassembling and assembling various components, including bottom mounting, VESA & LED metal, PCB installation, key button & speaker, WiFi installation, screw fixing, and bottom/back cover installation. Includes diagrams and cautions for specific steps (e.g., avoiding touching components, ensuring proper locking, and not overlapping brackets).
- Wiring Connection Diagram: Provides detailed instructions and diagrams for wire dressing, including specifications for PET tape and PET+AL tape placement, and guidance on connecting and disconnecting flexible cables.
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