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LC-32DH57E-BK/RU-BK/S-BK

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LC-32DH57E-BK

Service Manual

 

[MAIN UNIT]
IC1301

VHiAK4341ED-1Y

DAC

AK4341 is 24 bits DAC of 2Vrms output. A newly developed advanced 
multiple bit system is adopted in the 

 modulator. In this model, this 

IC is used to use the audio signal from a digital tuner as an audio out-
put signal of SCART1. 

1/10

IC1302   

VHiMT8292N+-1Q

Audio multiplexer

The MediaTek MT8292 introduces the advantages of an input multi-
plexer, the headphone driver and the PGA outputs. The analog input 
pins can either independently support GPIO function or provide extra 
GPIO pins to use. The analog input pins can either independently sup-
port GPIO function or provide extra GPIO pins to use.

1/10

IC1303

VHiS80944NM-1Y

Voltage detector with built-
in delay circuit

This IC is a highly precision voltage detector (4.4V) with built-in delay 
circuit.
In this model, It used as voltage detector of MUTE signal. 

1/10

IC501

VHi2BR24C21F-1Y
for service
(RH-iXC206WJQZS)

1K E2PROM

This IC is a 1Kbit-2-wire (I2C bus type) serial EEPROM that can be 
programmed electrically. The EEPROM chip stores the EDID data of 
PC input. This data is controlled through I2C signals.

2/10

IC506

VHiM3221EiP-1Y

RS232C-DRIVER

The MAX3221E is a single driver, single receiver RS-232 solution 
operating from a single Vcc supply. The RS-232 pins provide IEC 
G1000-4-2 ESD Protection. The device meets the requirements of 
TIA/EIA-232-F and provides the electrical interface between an asyn-
chronous communication controller and the serial-port connector.
The charge pump and four small external capacitors allow operation 
from a single 3V to 5.5V supply. 

2/10

IC1508

VHiSii91873-1Q

HDMI_Port _Processor

The SiI91873 HDMI port processor is the second generation of HDMI 
devices that support revision 1.3 of the HDMI specification.
The main feature is as follows. 
1) 4-input, 1-output HDMI port processor.
2) Integrated TMDS receiver and transmitter cores capable of receiv-

ing and transmitting at 2.25Gbps.

3) Supports video resolutions up to 1080p, 60Hz, 12bit or 720p/1080i, 

120Hz,12bit.

4) Receiver fully comply with DVI1.0, HDCP1.1 and HDMI1.3 specifi-

cations.

3/10

IC3302

VHiBD6538G+-1Y

USB high side SW

BD6538G is single channel high side powers switch with low ON resis-
tance Nch power MOSFET. 
Rich safety functions such as over current detection, Thermal shut-
down (TSD), under voltage lock out (UVLO) and soft start function 
which are required for the power supply port protection are integrated 
into 1chip.

4/10

IC3303   

RH-iXC758WJQZQ

VCT & Main CPU

This IC is Video Processor & MAIN CPU. 
In this IC, the decode processing and the video signal processing are 
done. 
Moreover, OSD is generated here and added to a picture signal.

4/10

IC3304

VHiS80928NM-1Y

Voltage detector with built-
in delay circuit

This IC is a highly precision voltage detector (2.8V) with built-in delay 
circuit. In this model, It uses as RESET signal of IC3303. 

4/10

IC3305

VHiS80920NM-1Y

Voltage detector with built-
in delay circuit

This IC is a highly precision voltage detector (2.0V) with built-in delay 
circuit. In this model, It used as a D-POW signal generator.

4/10

IC3501/2

RH-iXC505WJQZQ

512Mb-DDR2-SDRAM

This IC is 512Mb DDR2 SDRAM.
This IC operates as a memory of IC3303 (Video Processor). ***

5/10

IC8403   

RH-iXC788WJN2Y

2Mb-FLASH

This IC is 2Mbit CMOS 3.0 Volt Flash Memory with 50-MHz SPI 
(Serial Peripheral Interface) Bus and Small Sector for Boot and 
Parameter Storage.

6/10

IC8401

RH-iXC721WJQZQ

512Mb-NAND-FLASH

This IC is 512Mb NAND flash memory.
This IC stores the software data that processes the system of TV such 
as the graphic processing, the LCD controls, and backlights etc. 

6/10

IC8455

VHiBR24S64F-1Y

I2C bus type-64K 
E2PROM

The BR24S64F is a 64Kbit-2-wire (I2C bus type) serial EEPROM that 
can be programmed electrically.
This IC stores the menu data and the adjustment value data of adjust-
ment process mode etc.
The data is given out by commands from the main microprocessor.

6/10

LC-32DH57E-BK/RU-BK/S-BK

5 – 2

IC4402

VHiAOZ1320C-1Y

SMART LOAD SW

The AOZ1320 is a P-channel high-side load switch with controlled 
slew rate. AOZ1320-04 have a slew rate of 1ms.

7/10

IC4401   

VHiMT8295AE-1Q

IC Controller

This is a control IC for PCMCIA cards. This controls information on IC 
cards inserted into the PCMCIA card slot (SC4401) or information on 
software version upgrade cards saved on flash memories to transfer 
the data to CPUs and memories.

7/10

IC2701

VHiYDA148QZ-1Y

A-AMP

This IC is a digital audio power amplifier. It is mounted by 32QFN 
small package with 15W or less stereo. it drives by 10W in 26, and 32 
types.

9/10

IC9605

VHiLV5893M+-1Y

1CH-SW-REG
BU3.3V-REG

LV5893M is 1.8A 1ch step down switching regulator. 
In this model, it generate BU3.3V.

10/10

IC9608

VHiLV5893M+-1Y

1CH-SW-REG
D5V-REG

LV5893M is 1.8A 1ch step down switching regulator. 
In this model, it generate D5V.

10/10

IC9606

VHiLV5805M+-1Y

1CH-SW-REG
D1.8V-REG

LV5805M is 2A 1ch step down switching regulator. 
In this model, it generate D1.8V.

10/10

IC9611

VHiTCR5SB25-1Y

1CH-SW-REG
2.5V-REG

The TCR5SB25 is CMOS general-purpose single-output voltage regu-
lators with an on/off control input, featuring low dropout voltage and 
low quiescent bias current. The output current is possible up to 200mA 
or less. In this model, it generate CPU2.5V.

10/10

IC9604   

VHiLV58072M-1Y

1CH-SW-REG
D1.1V-REG

LV58072M is 3A 1ch step down switching regulator. 
In this model, it generate D1.1V.

 10/10

IC9607

VHiS80944NM-1Y

Voltage detector with built-
in delay circuit

This IC is a highly precision voltage detector with built-in delay circuit. 
In this model, It used as enable signal of BU3.3V_REG. 

 10/10

IC2601
IC9601

VHiHC2G66DP-1Y

Bilateral Switch

This IC is provides a dual analog switch. Each switch has two pins for 
input or output and an active HIGH enable input.

8/10
10/10

[POWER UNIT]
IC7201

VHiSTRY64761E

SWING-P-CTL

This product is hybrid IC for the pseudoresonant switching power sup-
ply with built-in power MOSFET and multifunctional control IC. Highly 
effective and the low noise are achieved by a pseudoresonance and 
the bottoms ticket operation at the normal operation, and low power 
consumption is achieved at the standby by the thing that intermittent 
oscillates. 

IC7101

VHiNCP1606B-1Y

Power Factor Controller

The NCP1606 is an active power factor controller specifically 
designed for use as a pre-converter in electronic ballasts, ac-dc adapt-
ers and other medium power off line converters.

[INVERTER UNIT]
IC7700

VHiBD9897FS-1Y

DC/AC-CONVERTER

BD9897FS is IC for DC-AC inverter control. Functions of soft start cir-
cuit, timer latch circuit, and under voltage lock output circuit (UVLO), 
etc. are built into this IC. 

LC-32DH57E-BK/RU-BK/S-BK

5 – 3

1

MCLK

I

Master clock input pin. An external TTL clock should be input on this pin.

2

BICK

I

Audio serial data clock pin.

3

SDTI

I

Audio serial data input pin.

4

LRCK

I

L/R clock pin.

5

RDN

I

Power-down mode pin. 
When at “L”, the AK4341 is in the power-down mode, held in reset and AOUTL/R are held in VCOM.
The AK4341 must be reset once upon power-up.

6

SMUTE

I

Soft mute pin in parallel control mode.
“H”: Enable, “L”: Disable

7

ACKS

I

Auto setting mode pin.
“L”: Manual setting mode, “H”: Auto setting mode.

8

DIF

I

Audio data interface format pin.
“L”: 24bit MSB justified, “H”; I2S.

9

DEM

I

De-emphasis enable pin. 
“H”: Enable, “L”: Disable

10

AOUTR

O

Rch analog output pin.
When PDN pin = “L”, outputs VCOM voltage.

11

AOUTL

O

Lch analog output pin.
When PDN pin = “L”, outputs VCOM voltage.

12

HVDD

I

Output buffer power supply pin. 
Normally connected to VSS with a 0.1

µF ceramic capacitor in parallel with a 10µF electrolytic cap.

13

VSS

—

Ground pin.

14

VDD

—

DAC power supply pin.

15

VCOM

O

DAC common voltage pin. 
Normally connected to VSS with a 10

µF electrolytic cap.

Outputs VCOM VDD voltage either PDN pin = “L” or “H”.

16

GAIN

I

Gain control pin.
“H”: +6dB, “L”: 0dB, open: +12dB.
When PDN = “H”, the gain pin is connected to VDD and VSS with 50k

Ω resister and held to VDD/2 when open.

When PDN = “L”, connected to VSS with 50k

Ω resister.

LC-32DH57E-BK/RU-BK/S-BK

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