Transcript
2-2. Explanation of Electronic Circuits in Digital and Analog TVs Explanation: 1. Digital or analog signals travel up the lower coaxial cable. After passing the coaxial cable splitter, the signals arrive at either digital or analog tuner boards. 2. After processing by the digital tuner board, digital signals arrive at the display driver and are converted into images seen on screen. After processing by the analog tuner board, analog signals arrive at the display driver and are converted into images seen on screen. Digital and analog tuners are specific to region, both having US and European versions. 3. Integrated TV modules include channel and volume control keys, as well as speaker output. Block Diagram:
Inverter
Display
Display driver Key bridge board DTV tuner
Analog tuner
Soft keys
Speaker (left, right)
Coaxial cable splitter
Coaxial cable in product Coaxial cable outside the product with digital and/or analog signals
2-2-1
2-3. Explanation of Electronic Circuits – iPod Function (Audio-Video) Explanation: 1.There are two types of iPod boards. One supports audio-video functions; the other supports audio-only functions. 2. In the case of the iPod board with audio-video functions, the iPod board sends signals to the display driver, which converts signals into images displayed on screen. 3. Audio control comes either via keys on the integrated TV screen or via volume control keys on the cardio product display itself. 4. iPod audio output can be either via speakers on the integrated TV module or via earphone jacks on the cardio product display.
Block diagram:
Inverter
Display
Display driver Key bridge board
iPod control keys
Soft keys
Speaker
iPod board with audio-video functions
iPod
iPod earphone jack
2-3-1
2-4. Explanation of Electronic Circuits – iPod Function (Audio-only) Explanation: 1.There are two types of iPod boards. One supports audio-video functions; the other supports audio-only functions. 2. In the case of the iPod board with audio-only functions, the TV will not show iPod video, even if the iPod function is activated on the TV module. 3. iPod volume can be controlled via keys on the cardio product display. Earphone jacks will output iPod audio.But video functions will not be supported.
Block Diagram:
Inverter
Display
Display driver
iPod volume keys
iPod board (audio only)
iPod
iPod earphone jack on the display
2-4-1
3-1. Troubleshooting Chart－Integrated TV Module Malfunction No power supply
Circumstance of Malfunction Integrated TV power LED is not lit.
No power supply
Integrated TV power LED lights but the TV does not operate. No video display Operation is normal but image quality issues exist.
Analog TV malfunction
Analog TV display is not good.
Digital TV malfunction
Digital TV display is not good.
Troubleshooting 1. Inspect the integrated TV power cord connection. 2. Inspect the adapter for 12 VDC ouput. 1. Replace the display driver module.
1. Inspect the coaxial cable. 2. Inspect wire connections. 3. Replace the inverter. 4. Replace the display driver. 1. Inspect the coaxial cable outside the product. 2. Inspect all wire connections. 3. Perform analog channel scan. 4. Inspect the analog tuner board. Compare tuner specifications with area specifications. (USA: NTSC; Europe: PAL,SECAM) 5. Inspect display driver module. 1. Inspect the coaxial cable outside the product. 2. Inspect all wire connections. 3. Perform digital channel scan.
Components to replace 1. Adapter
1. Display driver
1.Inverter 2. Display driver
1. Analog tuner 2. Display driver
1. Digital tuner 2. Display driver
4. Inspect the digital tuner board. Compare tuner specifications with area specifications. (USA: ATSC; Europe: DVB) 5. Inspect the display driver module.
3-1. Troubleshooting Chart－Integrated TV Module, Continued
iPod function malfunction
iPod video is not good.
No audio output
Video is normal, but there is no audio output.
Key malfunction Keys do not operate.
iPod earphone malfunction
iPod earphone has no sound.
1. Inspect the iPod output wire connection. 2. Inspect all wire connections. 3. Replace the iPod connection cord. 4. Replace the iPod encoder board. 1. Inspect integrated TV wire connections. 2. Inspect each speaker – left and right – separately. 3. Replace the display driver. 1. Inspect all wire connections. 2. Replace the soft keys. 3. Inspect the soft key connection wire. 1. Inspect all wire connections. 2. Replace the iPod earphone jack board.
1. iPod output 2. iPod board
1.Speaker 2.Display driver
1. Soft keys
1.iPod output wire 2. iPod earphone board
Integrated TV Screen Angle Adjustment
