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OPERATING PRINCIPLES OF THE CIRCUIT COMPONENTS
If any problem occurs in the flash integrated
circuit, the chassis will not function because the
software in the chassis does not start. As soon
as the chassis is energized, LED located on the
front panel will start flashing. This means that
main IC has read and started the software. IF
LED is constantly illuminated but not flashing,
and the chassis is not turned on even though it
is energized, this means either software was not
read due to a problem in flash IC or it could not
be started due to a problem in main IC.
Keys such as HDCP, CI are stored in E-MMC
flash in TVs with GF chassis. This is why it is not
recommended to completely delete the flash.
IC1000 Audio and headphone
amplifier
(IC-SMD TAS5739MDPHPR
QFP)
The integrated circuit of audio amplifier ampli-
fies digital audio data coming from main IC to
the desired level and sends it out.
The integrated circuit of audio amplifier ampli-
fies digital audio data coming from main IC to
the desired level and sends it out. Gf chassis vol-
ume output is 2x15W. For its all products, audio
out power is 15 W (8 ohm). As is the case with
KR chassis, there is not a separate circuit for the
headphone socket. Headphone amplifier is in
the audio IC. IC1000 audio amp. is supplied by
24V VCC_AUDIO voltage.
IC1302 DC-DC converter
TPS562200DDCR SOT23-6 T&R)
IC1302 is the converter that converts 12 Volt
input to Vcc3v3_u (3.3 Volt). Vcc3v3_u supply
supplies flash and some main integrated circuit
lines.
IC902,IC904 DC-DC converter
SMD TPS562200DDCR SOT23-6 T&R)
IC902 is the converter that converts VCC-ST
Voltage to 1.5 Volt. DDR RAM is supplied from
here. When 1.5 V output fails, led is lit in a
single position and TV does not start.
(IC-SMD
(IC-
91
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