This document describes the Philips QM16.1L LA Colour Television chassis, covering its functions, technical specifications, usage, and maintenance features.
Function Description
The Philips QM16.1L LA chassis is a new colour television platform launched in Europe in 2016. It is designed to support a wide range of models, primarily utilizing the MT5593UPIJ scaler. Key functionalities include ISDB-T reception, USB 3.0 connectivity, multi-media capabilities, and Video Out functions. The chassis also supports various stylings, such as the xxPUG6601/77 series.
The core of the television's operation is managed by the MT5593UPIJ System-on-Chip (SoC), which serves as the main audio and video processor. This SoC integrates a wide array of features, including worldwide multi-standard analog TV demodulators, ATSC/DVB-T/DVB-C/DTMB demodulators, a true 120Hz Full HD MJC (Motion Judder Compensation), a powerful CPU core, a transport de-multiplexer, and a multi-standard video decoder. It also incorporates a rich format audio codec, MHL 2.0 & Standby Charging, Ethernet MAC+PHY, and local dimming for LED backlighting. The MT5593UPIJ's video processing functions, such as NTSC/PAL/SECAM Video Decoder and MPEG1/2/4/H.264/VC1/RM/AVS/ and h.264/HEVC decode, are designed to deliver high-quality video. The MediaTek MDDI™ de-interlace solution ensures smooth picture quality for motion, while a 3D comb filter enhances details for still pictures. The special colour processing technology aims to provide natural, deep colours and true studio quality video.
The television's power architecture is designed to support various display types, including CCFL/EEFL backlight (conventional IPB power panel) and LED backlight (side-view LED without scanning, side-view LED with scanning, direct-view LED without 2D-dimming, and direct-view LED with 2D-dimming). The power supply unit (PSU) is treated as a black box for service, meaning that if defective, the entire board should be replaced. The PSU provides several output voltages to the chassis, including +8.5V (standby mode), +12V (on-mode), +12V_audio, and 37.4V for backlight, as well as high voltage to the LCD panel and outputs for LED drivers (PSL, PSLS, PSDL).
Connectivity options are extensive, featuring multiple HDMI inputs (HDMI 1 with ARC/MHL, HDMI 2 with ARC, HDMI 3 with ARC/MHL), USB ports (USB1, USB2, USB3), SPDIF out, Ethernet (RJ45), TV antenna input, and audio/video input (CVBS, Audio L/R). Side connections include a Service/UART port for debugging and data transfer, and headphone output.
Important Technical Specifications
- Chassis: QM16.1L LA
- Scaler/Processor: MT5593UPIJ HSBGA-900
- Memory: EMMC THGBMHG6C1LBAIL 8GB P-WFBGA153, DRAM NT5CB256M16DP-EK 4Gb VFBGA-96
- Tuner: Latam TDST-H880F
- Demodulator: TC90537FG LQFP-48 (for ISDB-T reception)
- Audio Amplifier: TTAS5760LDDCAR 20W TSSOP-48 (Class D-IC U601)
- Power Supply: 715G7374 PSU / 715G6973 PSU (depending on model)
- Output Voltages (PSU): +8.5V (standby), +12V (on-mode), +12V_audio, 37.4V (backlight), high voltage for LCD panel, LED driver outputs.
- HDMI: HDMI 1.4/HDCP 1.3 support, ARC/MHL 2.0 on HDMI 1, CEC control, HPD control, stable clock detection.
- USB: USB 2.0, USB 3.0
- Audio Output: Headphone (80 - 600 Ω / 10 mW), SPDIF Out (0.5 VRMS / 10 kW)
- Video Input (CVBS): 1 Vpp / 75 W
- Audio Input (L/R): 0.5 VRMS / 10 kW
- Ethernet: RJ45
- Wi-Fi/BT Module: Supported (e.g., WiFi01)
- Display Options: Supports various panel types, including 50" and 55" models, with specific display option codes (e.g., 036 for TPT500UK-DJ2QS5.N SM1B, 233 for TPT550J1-QVN03.U S100C).
Usage Features
The television offers several user-facing features and modes:
- Service Modes: The chassis includes Service Alignment Mode (SAM), Factory Mode, and Customer Service Mode (CSM).
- SAM: Allows modification of NVM, display/clear error code buffer, and perform alignments (e.g., White Tone). It displays operation hours, software version, error codes, and option settings. Activated by "062596" followed by "INFO/OK" on the remote.
- Factory Mode: Provides extended alignments, panel ID/tuner ID information, error buffer clearing, various software alignment settings, and test pattern display. Activated by "menu/home" then "1999" followed by "Back/Return".
- CSM: A read-only mode for consumers to view diagnosis information (set type, production code, 18AC SSB/Display/Supply/Sensor Board, software versions, MAC addresses, Netflix key validity, event counter). Activated by "123654" on the remote.
- Life Timer: Counts normal operation hours (not standby hours), displayed in SAM.
- Software Identification: Displays chassis name, region indication, main version number, and sub-version number.
- Display Option Code Selection: Allows setting the display option code after SSB or display exchange using "062598" followed by MENU and a 3-digit decimal panel type value.
- Software Upgrading: The main software can be upgraded via USB using a FAT-formatted memory stick. This process involves downloading a ZIP file from the Philips support website, extracting it to the USB stick, and then inserting the stick into the TV.
- HDMI ARC/MHL: Supports Audio Return Channel (ARC) and Mobile High-Definition Link (MHL) for enhanced connectivity with external devices.
Maintenance Features
Maintenance and repair procedures are detailed in the manual, emphasizing safety and proper handling:
- Safety Instructions: Always connect the TV to mains via an isolation transformer (> 800 VA). Replace safety components only with identical original parts. Check wire routing, insulation, and strain relief. Measure electrical DC resistance between mains plug and secondary side.
- ESD Precautions: All ICs and semiconductors are susceptible to electrostatic discharges. Use a wristband connected to the set's mass during repair.
- Lead-free Soldering: Use only lead-free soldering tin and appropriate tools. Solder-tip temperature should be 360°C-380°C for no more than 4 seconds. Avoid mixing lead-free and leaded soldering.
- Mechanical Instructions: Detailed steps for cable dressing (for 50" and 55" models), stand removal, rear cover removal, keyboard control unit removal, SSB removal, PSU removal, WIFI module removal, IR/LED board removal, speaker removal, and LCD panel removal. Re-assembly is the reverse of removal, with emphasis on correct cable placement and EMC foam integrity.
- Error Codes: The TV identifies failures using error codes, stored in an error buffer (up to five errors). These can be read via SAM/CSM or by the blinking LED procedure (red LED pulses corresponding to the error code number). Error codes are cleared via SAM/Factory mode commands or automatically after 50 hours without change.
- Fault Finding Tips:
- Check component mounting, values, and solder joints.
- Verify correct option settings.
- For "no picture" issues, check the display code.
- For unstable picture via HDMI, check HDCP key validity.
- For TV not starting from standby, re-flash software.
- Audio amplifier (U601) requires proper cooling; ensure powerpad is well-pushed to PWB when replacing.
- Disconnect speakers only when the TV is OFF to prevent damage to the audio amplifier.
- Always check Panel Code in CSM when replacing SSB to avoid unwanted side-effects.
- NVM Editor: Allows direct modification of NVM contents in SAM mode, but caution is advised.
- UART Logging: Provides diagnostic information, indicating if the TV is starting up and if flash RAM/DRAM communication is working.
- Reset of Repaired SSB: After replacing an SSB, it is crucial to reset the NVM to "virgin mode" and set the correct set type and production code via SAM. MAC address reload is also necessary for "Smart TV level 0" models.
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