-5-
N2SL
IC Descriptions for UK1A
IC001
This is an LA42052 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 SC2_8, which is normally used for SCART 2 pin 8 signalling but is adapted fro the moni-
tor sets.
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.
IC2001
This is a picture improvement chip, Philips TDA9178, which takes a YUV input from the LOC and carries out vector
processing of luminance and colour to improve overall picture quality and reduce noise. The IC requires an 8V
power supply and is also connected to the I2C bus.
IC201
This is the Philips LOC 1 chip which is the main system processor. It consists of three ICs encapsulated in one BGA
package with 388 balls. The “Cosmic” and “Picasso” chips carry out analogue and digital processing respectively,
and together from the UOC III which is used in many other sets. These are complemented by the Lithium IC which
carries out digital processing and scaling functions.
The IC requires 5V, 3.3V and 1.8V for correct operation – although only 5V and 3.3V are required in “standby”
mode. Full descriptions of all port functions are given elsewhere in this manual.
IC1221(digital only)
This is a ROHM BA7609F triple video switch which allows audio and video from the digital system to be output to
the SCART 2 socket for recording. The IC is controlled by the REC_CTL signal from the MCU IC860.
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 backlight enable line
BL_EN. It takes input from the main power and the 5V CPU line.
IC6600
This is a chopper regulator, Sharp PQ1CY series, which provides the power for the LCD panel – 3.3V for 15” and
20”, 5V for 17” and 23”. The regulator is switched on at power up via the control line POWER 1 and transistor
Q6600. The power is switched to the panel, also by POWER 1, via the FET switch Q1600.
IC6602
This is a Sharp PQ1CZ series chopper regulator which provides the 14V supply for the audio IC. It is switched by
the control line POWER 1 from the LOC.
