Ic Descriptions - Sanyo CE27LD6-B Service Manual

IC Descriptions for UK4A
IC001
This is an LA4919N-E which is the audio amplifier for the set. It has left and right inputs from the LOC and left and
right outputs to the speakers and headphone socket. It also has mute and standby functions which are activated by
the LOC as appropriate.
IC1101 (monitor sets only)
This is a switching IC, NJM2233BM, which allows the sync signal input on monitor sets to be switched between pin
20 of SCART 1 (conventional & ALBOS) and pin 14 of SCART 1 (SIS signal). The IC takes a 5V supply and is
switched by the control line RGB_SW.
IC1205
This a ROHM BA7603F triple video switch which allows the RGB input to be switched between SCART 1 and
SCART 2. The switch is controlled by the RGB_SW line from the IC.
IC1222
This a MM1225XF which is an electronic switch. This IC selects either "scart2 monitor out" or "digital module cvbs"
as the output for scart 2. This is only active on digital sets.
IC1271
2
This a large multiway electronic switch, MM1631BJBE. Via the I C lines the cpu can select any audio input L/R pair
and feed them to scart 3 or IC801.
IC151
BA2904F - this is an OP-AMP used to amplify the AGC voltage back to IC801.
IC1602
This is a "partial resonance power supply" IC. It is used as a SMP to supply the standby voltages.
IC1604 / IC671
This is a "precision shunt regulator" used in an "error amp" configuration to provide feedback control of the supply.
IC1801/1802
2 2
PCA9534PW - These are I C expander IC's. They convert I C commands from IC801 into control lines.
IC1841/1851
These are OP-AMPS used to control the speed of the fans
IC4001
This is a SST SST39VF020 CMOS multi-purpose flash with a capacity of 2Mbits. It is connected to the LOC using
address lines, data input/output, write enable and control lines. The flash IC is powered by the 3V3 SW supply.
IC4002
This is a ROHM BD5260G open drain voltage detector IC which works in conjunction with the main power and the
3.3V standby line to control the back lights.
IC601
This is a "current mode PFC controller" operating in transition mode. It is used in conjunction with L603 as active
power phase correction.
IC6600
This is an LA5754 voltage regulator. It provides the 5v supply for the LCD panel.
IC6601
This is a BA33BC0FP voltage regulator. It converts the 5v standby supply to 3.3v.
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N2WKD/YKD