Hisense LCD24V88APAM, Service Manual

Page: 34 / 66

- 34 -
4. Circuit instruction
4.1 Main board Power assign and block diagram
Power assign:
The Powerd only has 12V output
，
other voltages are converted from 12V.
a. 5Vstb is converted by U10 from 12V
，
5VAIN and +5V_USB are converted by U7 from 5Vstb.
b. +3.3Vstb that standby power supply for main IC (U41)
、
Flash (U42)
、
EEPROM (U43)
、
HDCP EEPROM
(U21)
、
Key is converted by 5Vstb from U5.
c. U28 and U30 power supply from 5VAIN
d. +3.3AVDD supply power for main is converted by U6 from 5VAIN; +2.6VM supply power for DDR is
converted by U8 from 5VAIN; VCC-1.26V supply power for main IC(core voltage) is converted by U9
from 5VAIN;
e +12V supply power for audio amplify is converted by U6 from +12V_IN; 5V-IN supply power for Tuner
is converted by U12V_IN;
f VCC-Panel supply power for Panel is converted by U4 from 5VAIN or +12V_IN
Block diagram: