Sanyo LCD-32XL2 User manual

P
SERVICE MANUAL LCD Television
N2YV/N2YVN/N2YVB
FILE NO.
Model No. LCD-32XL2
LCD-32XL2B
(Argentina / Brazil)
Give complete “SERVICE REF. NO.” for parts order or
servicing.It is shown on the rating label at the cabinet
back of the unit.
This T.V. receiver will not work properly in for-
eign countries where the television transmission
system and power source differ from the design
specifications. Refer to the specification table.
Contents
Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chassis Block Diagrams . . . . . . . . . . . . . . . . . . . . . . 4-5
IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Sub CPU Port Functions . . . . . . . . . . . . . . . . . . . . . . . 8
CPU Port Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Option Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
On-screen Service Menu System . . . . . . . . . . . . . . . 11
Initialisation of Memory IC . . . . . . . . . . . . . . . . . . . . . 12
Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . 13-14
Mechanical Disassembly . . . . . . . . . . . . . . . . . . . 15-18
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 19-20
Chassis Electrical Parts List . . . . . . . . . . . . . . . . 21-36
Printed Wiring Board . . . . . . . . . . . . . . . . . . . . . . 37-43
Service Ref. No. LCD-32XL2-00
LCD-32XL2B-00
LCD-32XL2B-01
- NOTE -
Difference between Model LCD-32XL2 and LCD-32XL2B:
1) Destination LCD-32XL2... Argentina
LCD-32XL2B...Brazil
2) Power Cord.
3) Instruction Manual.
Difference between Service Ref. No. LCD-32XL2B-00 and
LCD-32XL2B-01:
1) Country of origin
LCD-32XL2B-00... Made in Argentina
LCD-32XL2B-01... Made in Brazil
Product Code:111376316 (LCD-32XL2-00)
111376335 (LCD-32XL2B-00)
111376334 (LCD-32XL2B-01)
Original Version
Chassis Series: UE2-B

377
245
506
545
922
711
401
233
115
153
(Unit : mm)
Safety Notice
-2-
Safety Precautions
The following precautions must be observed.
1: Comply with all caution and safety-related notes provided on the cabinet back, cabinet bottom, inside the
cabinet or on the chassis.
2: When replacing a chassis in the cabinet, always be certain that all the protective devices are installed
properly, such as, control knobs, adjustment covers or shields, barriers, etc..
DO NOT OPERATE THIS TELEVISION WITHOUT THE PROTECTIVE SHIELD IN POSITION AND PROPERLY
SECURED.
3: Before replacing the cabinet cover, thoroughly inspect the inside of the cabinet to see that no stray parts or
tools have been left inside.
Before returning any television to the customer, the service personnel must be sure that it is completely safe to
operate without danger of electrical shock.
Product Safety Notice
Product safety should be considered when a component replacement is made in any area of a receiver.
Components indicated by mark in the parts list and the schematic diagram designate components in which
safety can be of special significance. It is particularly recommended that only parts designated on the parts list
in this manual be used for component replacement designated by mark . No deviations from resistance
wattage or voltage ratings may be made for replacement items designated by mark .
[ Details of Dimensions ]

Specifications
-3-
Power Source AC100-240 Volts, 50/60Hz
Receiving System PAL-N/N/, PAL-M/M, NTSC-M/M
Channel Coverage ANTENNA mode
VHF: CH02 - CH13
UHF: CH14 - CH69
CATV mode
VHF band: CH01-CH13
MID band: CH14-CH22
SUPER band: CH23-CH36
HYPER band: CH37-CH64
ULTRA band: CH65-CH94 and CH100-CH125
Low MID band: CH95-CH99
Aerial Input Impedance 75 Ω
LCD Panel
Screen Size (Measured Diagonally):32 inches
Picture Resolution: WXGA 1366 (Horiz.) x 768 (Vert.) pixels
Viewing Angles: Horiz. 176˚, Vert. 176˚
Contrast Ratio: 1000:1
Brightness: 550 cd/m2
Audio Output (RMS) 10W+10W
Speakers 6 cm x 12 cm x 2 pcs.
AV Terminals
AV1 Video:Composite video Input (RCA Jack) x 1
Audio:L/R Stereo Input (RCA Jack) x 1 set
AV2 CENELEC Standard (Scart Terminal)
Input: Composite video, RGB, S-video and audio-L/R
Output: Monitor-output with composite video and audio-L/R
AV3 Video:Composite video Input (RCA Jack) x 1
Audio:L/R Stereo Input (RCA Jack) x 1 set
AV4 Video:Composite video Input (RCA Jack) x 1
Audio:L/R Stereo Input (RCA Jack) x 1 set
AV5 Video:Component Y, CB,CRInput (RCA Jack) x 1 set
Audio:L/R Stereo Input (RCA Jack) x 1 set
Audio Monitor Output: L/R Stereo Output (RCA Jack) x 1 set
Headphone Jack: Mini Stereo Jack x 1
Dimensions:922 (W) X 545 (H) X 233 (D) mm (Included Tilt Stand)
Weight 17.5 kg (Included Swivel Stand)
Specifications subject to change without notice.

-4-
Chassis Block Diagrams (Video Signal Lines)
IF
A101
TUNER SAW
FILTER
X121 LCD PANEL
(WXGA)
KLP1 (27") KLP2 (32")
15
AV2 SCART (K1002)
R/S-VIDEO C IN
G IN
B IN
11
7
COMPISITE VIDEO/Y IN
20
19
VIDEO MONITOR OUT
S-VIDEO-C IN
19
D3901
LED
A3901 RC RECEIVER
RC-IN
ASSY,PWB, CONTROL
ASSY, PWB, SIGNAL IC101
(TDA9886)
IF-PLL
DEMODULATOR
1
2
VIF1
VIF2
17
TV
IC805
FLASH
MEMORY
IC802
MEMORY
6
5
SCL
4
SDA
COMPISITE VIDEO IN
COMPONENT CRIN
COMPONENT CBIN
COMPONENTY IN
AV1TERMINAL (K1001)
AV5TERMINAL (K1006)
CBIN (AV5)
COMPISITE VIDEO IN
AV3TERMINAL (K1003)
COMPISITE VIDEO IN
AV4TERMINAL (K1004)
16
12
AV1 VIDEO IN
7
IC1224
VIDEO SW
AV2 VIDEO IN SELECTED
VIDEO OUT
1
KD
15
IC1251
RGB SW
14
9
G/Y IN (AV2)
5
AV3 VIDEO IN
AV4 VIDEO IN 3
R IN (AV2)
12
CRIN (AV5)
8
18
G IN
B IN (AV2)
5
6B/CB
16
1
3R/CR
17
K8D
27
ASSY, PWB, SCAL
IC2001
(STV2310)
26
29
3
63
51
52
CVBS IN
C IN
G IN
B/CB IN
R/CR IN
53
22
23
24
14
2Y INAnalog
Input Stage
RGB Insertion
Input
SRC
Luma
Chroma
Separator
Standard Identifier
& Chroma Demodulator
PAL/NTSC/SECAM
Soft Mixer
Format Converter
& Output Scaler
Video Corection
Output FIFO
Line-locked Output Pixel Clock
Synchronization
& Monitoring Unit
VBI Slicer
I2C Interface
System Clock
generation DIGITAL
Y, CB, CR
OUTPUT
Pin-19~28
IC801
(STV3600)
MAIN CPU/CAPTION DECODER 117~124
IC803
SDRAM
IC804
SDRAM
IC1801
SUB CPU
3
20
1
IC4001
(ADE3800)
ANALOG LCD
DISPLAY ENGINE
(SCALER/LVDS)
POWER KEY IN KEY IN
SW3951~ SW3955
K19J
K8J
145 132
146
153/154/155
ANALOG PB/B, PR/R,Y/G
OUTPUT
DIGITALVIDEO DECODER
33/34/38/39/43/44
27":90~99
32":77~86

-5-
Chassis Block Diagrams (Audio Signal Lines)
IF
A101
TUNER SAW
FILTER
X122
2
AV2 SCART (K1002)
6
ASSY, PWB, SIGNAL
IC101
(TDA9886)
IF-PLL
DEMODULATOR
23
24
SIF1
SIF2 8TV AUDIO OUT
AUDIO L-IN
AV1TERMINAL (K1001)
AV5TERMINAL (K1007)
AV3TERMINAL (K1003)
AV4TERMINAL (K1004)
78
9
10
IC3451
(STV8216)
AUDIO PROCESSOR/
STEREO SOUND DEMODULATOR/
3D SURROUND
1
IC1222
AUDIO SW
14
18
14
15
15
5
3
12
1
2L-OUT
24
23
IC3501
(NJM2155)
BBE/BASS EXPANDER
SP902
K001
HEADPHONE JACK
R-OUT
AUDIO R-IN
AUDIO L-IN
AUDIO R-IN
AUDIO L-IN
AUDIO R-IN
AUDIO L-IN
AUDIO R-IN
AUDIO L-IN
AUDIO R-IN
13 R-OUT
AV3 L-IN
AV4 L-IN
AV5 L-IN
AV3 R-IN
AV4 R-IN
AV5 R-IN
AUDIO MONITOR OUT
(K1005)
19
AUDIO MONITOR OUT-L
3
AUDIO MONITOR OUT-R
AUDIO MONITOR OUT-L
AUDIO MONITOR OUT-R
L-IN R-IN
IC001
(LA4919N)
AUDIO AMP.
28
29
1
24
AUDIO
R-OUT
AUDIO
L-OUT 6
19
13
9
AUDIO R-OUT
AUDIO L-OUT 15/16
24/25
SP901
L-OUT KSPL
KSPR
31
29
HEADPHONE L-OUT
HEADPHONE R-OUT
1
2
27 28
L-OUT
R-OUT
KIF
K36IF
11
TV
AUDIO-IN
MTS / SAP
1
2
KP3 K36P3
TV -L
TV OUT-R
TV OUT-L
TV -R
IC3601
(CXA2104S)
ASSY, PWB,
MTS
4
11

-6-
IC001 < AUDIO AMP. > LA4919N-E
IC Block Diagrams
2
1
3
4
6
5
7
8
10
9
12
13
14
17
18
19
20
21
22
23
26
HP IN1
Headphone Block
27
Ripple filter
Ripple filter
Voltage
Regulator Vcc
28
VG=6dB
VG=6dB
H/P Standby SW
15
16
A
B
AMP. Standby
SW
Output
amplifier
Output
amplifier
Nonlinear
amplifier
24
25
Muting circuit
used at power
on
Intput
amplifier
H. L. S
Switching regulator Block
Switching
Drive
ABCD
*H. L. S
Higher Level
Signal Selector
Headphone stage
Input amplifier stage
Switching regulator stage
Power TR stage
VCC
C
D
Output
amplifier
Output
amplifier
Nonlinear
amplifier
OUT1+
OUT1 -
Output amplifier
stage
11 REF amplifier
Input amplifier
HP IN2 HP OUT2
HP OUT1
HP D.C
HP Standby
AMP Standby
D.C
DDL
ON TIME
IN2
PRE GND
PRE VCC
IN-VREF
IN1
POWER GND
POWER GND
SW GND
SWB
SWE
SW OUT
OUT2+
OUT2 -
IC101 < IF-PLL Demodulator > TDA9886TSV4P
VIF2
TUNER AGC VIF-AGC
SIF AGC OUTPUT
PORTS
I2C-BUS TRANSCEIVER
SINGLE REFERENCE QSS MIXER
INTERCARRIER MIXER
AND AM DEMODULATOR
VIF-PLL
RC VCO
DIGITAL VCO CONTROL AFC DETEVTOR
SOUND TRAPS
4.5 to 6.5MHz
AUDIO PROCESSING
AND SWITCHES
NARROW-BAND
FM-PLL DEMODULATOR
SUPPLY
MAD
1
2
34
6
5
7
8
10
9
12
13
14
11
17
18
19
20
21
22
23
15
16
24
VIF1
SIF2
SIF1
Vp
AGND N.C. OP1 OP2 SCL SDA DGND SIOMAD
Sound intercarrier output
and MAD select
FM-PLL
FM-PLL filter
cAGC
cAF
de-emphasis
network
cAF
DEEM
AUD Audio output
CVBS
Video output: 2Vp-p
(1.1vp-p without trap)
VPLL REF AFC
External reference signal
or 4MHz crystal
VIF-PLL filter
VAGC
cVAGC
(pos)
TOP TAGC
cAGC(neg) cBL
IC3501 < BBE/Bass Sound Processer >
NJM2155M
2
1346
578
10
9
12
13
14
17
18
19
20
21
15
16
11
LOWOUT-L
OUT-L
Vcc
IN-L
FILTER
MACH3
HOUT-L
LOWIN-L
IN-R
HIN-R
HOUT-R
22
23
24
HIL-L
BBE
BBE
Mach3
Bias
Control
LOWIN-R
LOWOUT-R
OUT-R
VREF
GIN
GOUT
LPIN
LPOUT
GND
BBE
PROCESS
LO CONTOUR

-7-
IC Block Diagrams
IC3601 < MTS Decoder > CXA2104S
21
3
4
6
5
7
8
10
9
12
13
14
17 18
19
20
21
MAIN IN
27
15
16
11
MAIN OUT
SAP IN
ST IN
SUB OUT
PCINT1
COMP IN
Vcc
PLINT
PCINT2
NOISETC
SAPTC
SAP OUT
IREF
VGR
DGND
SCL
SDA
30
LPF
MATRIX
VCA
RMSDET
RMSDET
SPECTRAL
VE
HPF
LPF
LPF
DeEm
AMP
(+4dB)
SW
LOGIC
NRSW/FOMO/SAPC
IREF I2C BUS I/F
LPF
BPF
SAPVCO
SAPIND
NOISE
DET
"PONRES"
"SAP"
"NOISE"
VCA
WIDE BAND
1/2
LPF
LPF
LPF
STIND
DeEm
VCA
VCO 1/4
LFLT
STLPF
FLT
ATT/INSW
(+6dB)
"STEREO"
VE
VEWGT
VETC
VEOUT
VCAIN
VCAWGT
VCATC
TVOUT-L
TVOUT-R
SOUT
22
23
28
24
25
26
GND
IC3451 < Audio processor > STV8216
2
1
10
9
14 18
19
15
MONO IN
62
SIF
23
28
24
Sound IF
73
78
AL1L
AL1R
AL2L
AL2R
AL3L
AL3R
Input Scarts
0.5V
rms
2V
rms
2V
rms
2V
rms
Audio
Stereo
A/D
Input Analog Audio Matrix
AGC
A/D
Multi-Standard
Digital Stereo
Demodulator
FM, AM, A2
& NICAM
Demodulation
69
52
IRQ
ST
Interrupt Request
Stereo Flag
Source preprocessing
Stereo Flag
Digital Audio Matrix
I2S Interface I2C Interface
63
61
SDO
WS
64
WS
40 39
SDA
SCL
BUS0 (BBE)
68 65
BUS1 (MACH-3)
HPD
35
Headphone
Detection
Audio Processing
Loudspeaker Audio Processing
Smart Volume Control, ST Wide
Surround, 5-band Equalizer &
Loudness, Beeper & Subwoofer Out
Headphone Audio Processing
Smart Volume Control,
Bass/Treble & Beeper
Audio Matrixing
Signal Crystal
Clock generation Power Supply Management
DC Regulators, Standby mode
XTI
XTO
30
53
LSL
LSR
SW
HPR
AO1L
AO1R
Audio
Stereo
D/A
Audio
Stereo
D/A
Audio
Stereo
D/A
Vol.
Bal
Gain
Vol.
Bal
Output Analog
Audio matrix
Low Noise
Audio
Mute
Low Noise
Audio
Mute
Low Noise
Audio
Mute
Low Noise
Audio
Mute
1V
rms
2V
rms
2V
rms
Loudspeaker
AO2L
AO2R
HPL
29
1V
rms
32
31
I2C Bus Expander
Headphone
Output Scarts
Sub woofer

-8-
IC Block Diagrams
Pin No. Function Name Function
1SCL I2C Bus Clock (For Tuner, IC101, IC3451 of Signal Unit)
2P3_7 TV_VGA (Not used)
3Reset Reset Input (L=Reset)
4Xout X’tal Osc. Output (10MHz)
5Vss Vss (GND)
6 Xin X’tal Osc. Input (10MHz)
7Vcc Vcc=3.3V
8Mode Mode / Connected to Vcc
9P4_5
10 P1_7 A Detection Input (Not used)
11 P1_6 DM Clock Output (Not used)
12 P1_5 DM Data (Not used)
13 P1_4 DM IR Send (Not used)
14 P1_3 RGB ON/OFF Output (Not used)
15 P1_2 Power4 Output
16 Vref Reference for ADC (Vcc)
17 P1_1 Timer Recording Output (H=Recording) (Not used)
18 P1_0 D/A Control Output (H=Digital)
19 P3_3
20 SDA I2C Bus Data (For Tuner, IC101, IC3451 of Signal Unit)
Sub CPU Port Functions (IC1801)
IC4001 < Analog LCD Display Engine > ADE3800
Analog
H&V
Syncs
GLBL
GLobal
Control
MCU (SCL, SDA)
I2CPWM
Pulse Width
Modulation
SMEAS
Sync
Measure
SRT
Sync
Retiming
XCLK
Domain
Analog
R,G,B
Data
INCLK
Domain
SCLK
Domain DCLK
Domain
Out Data
Syncs & Clock
(To LCD Panel)
TCON
LLK
Line Lock
PLL
ADC
(Digital)
ADC
(Analog)
SMUX
Sync
Multiplexer
DMEAS
Data
Measure
SCL
Scaler
SCLK
PLL DCLK
PLL, FM
FLK
Flicker
Detection
TCON
Timing
Controller
PGEN
Pattern
Generator
sRGB
GAM
Gamma
OSD
On-Scree
Display
APC
OMUX Output multiplexer
LVDS_RSDS

-9-
Main CPU Port Functions (IC801)
Pin No. Port Name Function
131 A0 N_Reset Output (Active=H)
133 A1 Power error-1 input
10 A2 PLL Lock
11 A3 LCD Brightness Output
135 A4 LED / For software flash
136 A5 Audio Mute / For software flash
137 A6 Control of Inverter (Active=L)
138 A7 For writing / FAN Control Check (For manufacturing process) (Active=L)
146 B0 Power ON/OFF Switch Input (AD Input)
145 B1 Key Board Input (AD Input)
144 B2 8-pin of Scart-1 Input (AD Input) -Not used-
143 B3 8-pin of Scart-2 Input (AD Input)
142 B4 8-pin of Scart-3 Input (AD Input) -Not used-
141 B5 AGC Input
130 C0 SDA for ADE3800 (IC4001)
129 C1 SCL for ADE3800 (IC4001)
128 C2 AV Switch-C Output
127 C3 Power-3 Output
4C4SDA for EEPROM (IC802)
3C5 SCL for EEPROM (IC802)
2C6SDA for device other than EEPROM
1C7 SCL for device other than EEPROM
5D0AV Switch-A Output
6D1 LCD ON (Back-Light ON/OFF) Output
7D2 50/60Hz Switch (Switching PAL/NTSC) Output
8D3AV Switch-B Output (Active=H)
132 D4 RC Input (Active=L)
147 D5 Power Switch-1 output
9D6Power error-2 Input
134 D7 Power Info. Input (Input of the power supply condition)

P
Option Setting
-10-
After replacing Memory IC (IC801)
The memory IC (IC802) stores the option data of TV set and service adjustments data for each circuit, therefore, when
the memory IC is replaced, it should be programmed to the following settings and “ Service Adjustment” on page 13-
14.
1) How to enter the Option Setting Mode
Press and hold the MUTE button on the remote control and press the CHANNEL DOWN (P▼)button on the front
control panel of the TV. The option window will appear on the screen.
[ Option Setting Menu ]
2) How to make the Option Setting
Select desired option item by pressing the CHANNEL UP or DOWN button.
To switch the option mode, use the VOLUME + or - button.
The data which is set in the option mode is stored into the memory IC automatically.
The following table shows the available option items and default setting mode.
Option Items Mode Default / Description
ON Timer ON or OFF Default “OFF” / Disable or enable ON Timer function.
Plug & Play ON or OFF Default “ON” / Disable or enable Plug & Play function.
Welcome Text ON or OFF Default “ON” / Display message when first set up.
BBE ON or OFF Default “ON” / Disable or enable BBE function on Sound menu.
Auto Volume ON or OFF Default “ON” / Disable or enable “Auto Volume Level” function
on Sound menu.
Bass Expander ON or OFF Default “ON” / Disable or enable Bass Expander on Sound menu.
16:9 Mode ON or OFF Default “ON” / 16:9 mode.
Noise Reduction ON or OFF Default “ON” / Disable or enable Noise Reduction function on
Setting menu.
Country UK. UK&IRE or EU Default “EU” / Selection of TV system.
Raster Rotation ON or OFF Default “OFF” / Disable or enable Raster Rotation function.
SESA ON or OFF Default “OFF”.
Digital RC ON or OFF Default “OFF” / Disable or enable use of Digital RC hand-set.
Light Monitoring ON or OFF Default “OFF” / Disable or enable Light Monitoring function.
Video Mute ON or OFF Default “OFF” / Disable or enable Video Mute function.
3) Exit from the Option Mode
Press the MENU button or turn off the TV set by pressing the Power ON/OFF button.
ON Timer OFF
Plug & Play ON
Welcome Text ON
BBE ON
Auto Volume ON
Bass Expander ON
16:9Mode ON
Noise Reduction ON
Country EU
Raster Rotation OFF
SESA OFF
DIGITAL RC OFF
Light Monitoring OFF
Video Mute OFF