Noblex 37LC804H User manual

NOBLEX
NOBLEX
SERVICE MANUAL LCD Television
N4BVA
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.
Product Code:113004620
Original Version
Chassis Series: UH1-L
ECO
MAIN/SUBCHANGE
BACK
PIP
BASS
SOUND
VIDEO MODE
POWER
RECALL
DISPLAY
MUTE
AUDIO MODE
SLEEP
IMAGE
ZOOM
SURROUND
CH
CH
Model No. 37LC804H
Service Ref. No. 37LC804H-00
(Argentina)
FILE NO.
Contents
Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chassis Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . 4
IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
IC7200 Port Functions . . . . . . . . . . . . . . . . . . . . . 12-14
CPU (IC8000) Port Functions . . . . . . . . . . . . . . . . 15-16
On-screen Service Menu System . . . . . . . . . . . . . 17-24
Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mechanical Disassembly . . . . . . . . . . . . . . . . . . . 26-31
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 32-33
Chassis Electrical Parts List . . . . . . . . . . . . . . . . 34-53

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 .

Specifications
-3-
Power Source AC 110 - 220 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):37 inches
Picture Resolution: WXGA 1366 (Horiz.) x 768 (Vert.) pixels
Brightness: 500 cd/m2
Audio Output (RMS) 10W+10W
Speakers 6 cm x 12 cm x 2 pcs.
Input and Output Terminals
AV1 Input Video:Composite video Input (RCA Jack) x 1
S-Video Input (SeparatedY/C) DIN 4-pin Jack x 1
Audio:L/R Stereo Input (RCA Jack) x 1 set
AV2 Input Video:Component Y, CB,CRInput (RCA Jack) x 1 set
Audio:L/R Stereo Input (RCA Jack) x 1 set
HDMI Input HDMI Terminal 19 pin x 1
Computer Input Video Input:D-SUB 15 pin x 1
Audio Input:Mini stereo jack x 1
Output Terminals
Video Monitor Output: Phono jack x 1
Audio Monitor Output: L/R Stereo Output (Phone Jack) x 1 set
Headphone Jack: Mini stereo jack x 1
Dimensions 1069 (W) X 642 (H) X 279 (D) mm (Included Swivel Stand)
Weight approx. 29.5 kg (Included Swivel Stand)
Environmental Considerations
Operating Temperature 0˚C ~ 40˚C (32˚F ~ 104˚F)
Operating Humidity 20 ~ 80%
Storage Temperature -10˚C ~ 50˚C (14˚F ~ 122˚F)
Storage Humidity 20 ~ 80%
Specifications subject to change without notice.

-4-
Chassis Block Diagram
A201
TUNER
LCD PANEL
(WXGA)
K7205
72
17
7
6
71
ASSY, PWB, MAIN
12
10
8
15
IC7201
SDRAM
160~171
VIDEO MONITOR OUT
AUDIO MONITOR OUT-L
MONITOR OUT
AUDIO MONITOR OUT-R
46
51
61 IC1200
AV SW
TV CVBS
AUDIO-R
AUDIO-L 70
AV1 VIDEO IN
AV1 AUDIO IN-L
AV1 AUDIO IN-R
6
7
9
S-VIDEO
AV1 IN
(K1001)
Y
C
Y IN (AV1)
C IN (AV1)
S IN (AV1)
COMPONENTY IN
AV2TERMINAL (K1003)
(K1002)
AV1 IN
14
17
COMPONENT CRIN
COMPONENT CBIN
AV2 AUDIO IN-L
AV2 AUDIO IN-R
COMPONENTY IN
COMPONENT CRIN
COMPONENT CBIN 30
28
33
AV2 VIDEO IN
PC (VGA)
INPUT
(K7200)
25/23/20
18/19
R/G/B
HORIZ. SYNC. / VERT. SYNC
DVI
INPUT 8/9
207/208/2/3/5/6/
IC7200
LCDTV Controller
with
Dual LVDS Transmitter
PC AUDIO INPUT
(K7204)
PC L/R
PC L/R
22/24
188~191
1~4
5/8
IC7209
STEREO D/A CONVERTER
HDMI L/R
29/31
HDMI L/R
IC2203
DIGITAL
VIDEO
DECODER
43~47, 50~52 54~61
CVBS
C
Y7
8
17
64
62
60
59
61 L
R
IC150
AUDIO
CONTROL/3D SURROUND
32
17L
R
26
IC101
AUDIO AMP.
9
13
SP
K1330
HEADPHONE
JACK
15/16
24/25
SP
27/28
L
R
PH-L/R
81~153
IC8000
CPU
IC8011
EEPROM IC8002
EEPROM
73 74
SDA
SCL
65
29 30
SDAE
SCLE
65
D1901 LED
(TIMER)
U1901
RC
RECEIVER
RC-IN
ASSY,PWB, KEY
POWER KEY IN KEY IN
SW1950~ SW1956
K19K
K8002
95 78
75
L
R
76
K19A
K8000
D1902 LED (POWER)
ASSY,PWB, LED
55~58
72~75
46~49
69~71
RESET
12
28TV-SYNC TO IC8000
(PIN-45)
IC003
SYNC. SEPARATION
45
TV-SYNC
38
P-FAIL-2
37
P-FAIL-1
43
POWER ON
89
P-FAIL-3
FAN CONTROL
4
SDA
SCL
42
43
4/10
T-SDA
T-SCL
5/9
T-SDA
T-SCL
35 36
SDA
SCL
29
28
MCU BUS
3
1
IC1709
18
20
19
22
21
IC8600
CLOSED CAPTION
PROCESSOR BLK
B
G
R59
60
57
58
15

-5-
IC Block Diagrams (On the ASSY, PWB, MAIN)
IC101 < AUDIO AMP. > LA4919N-E
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 -
NC
14
AFC
VCC
13 AFC CTL
12 VCO OUT
11 VCO IN
10 HD OUT
9DET OUT
8
32fH VCO
LOCK
DET
COUNT
DOWN
SYNC
SEP V. SEP
NC
1VIDEO IN
2F.B CLAMP
3SYNC OUT
4VD OUT
5GND EXC
67
IC003 < Sync. Separation> LA7217M-T
IC150 < Audio Control/ 3D Surround>NJW1167V
6
8
1
7
20
10
25
22
AGC
BIAS
VOL 1
19
18
14 13
16
15
17
30
21
23
24
12
11
INa
AGC1
TONE Ha
TONE La
OUT a
CVA
CVB
CTH
CTL
CSR
SCL
SDA
V+
GND
VREF
OUT b
SR-FIL
TONE Hb
TONE Lb
5
2
34
INb
29
28
27
SS-FIL
26
9
PORT1
OUTw
32 VOL 1
eala
&
SIMULATED
STEREO
TONE
TONE
LPF
VOL 2
VOL 2
VOL 2
AGC2
31
LF1
LF2
LF3
Trimmer
ADR
CVW
PORT0
AUX0
AUX1
IIC BUS
INTERFACE

-6-
IC Block Diagrams (On the ASSY, PWB, MAIN)
IC1651 < 1 ch Power Controller by the PWM Switching System > FA7700V-TE1
+
+
1
2
3
4
8
7
6
5
RT
REF
IN-
FB GND
OUT
VCC
CS
VREF
OSC
UVLO
Power Good Signal
BIAS
VREF
2.2V
+
ERROR.
AMP. PWM
+
+
+
+
0.3V ON/OFF
ON/OFF OFF
2.2V
1.5V S.C. DET
S.C.P
5.5V1.5V
IC2203 < Digital Video Decoder > TVP5147PFP
8
1
7
74
72 37
73
71
23
40
VI_1_A
2
29
36
9
Analog
Front End
33
35
Clamping
AGC
2 x 11-Bit
ADC
80
18
16
17
VI_1_C
VI_1_B
Copy
Protection
Detector
VBI
Data
Processor
M
U
X
Timing Processor
with Sync. Detector Host
Interface
28
Output
Formatter
Composite and S-Video processor
Y/C
Separation
5-line
Adaptive
Comb
Luma
Processing
Chroma
Processing
Sampling
Clock
VI_2_A
VI_2_C
VI_2_B
VI_3_A
VI_3_C
VI_3_B
VI_4_A
CVBS/Y
CVBS/
C/Pb
CVBS/
Y
CVBS/
C/Pr
CVBS/Y
Y
C
GPIO
75
34
XTAL1
XTAL2
PWDN
RESETB
DATACLK
AVID
FID
VS/VBLK
HS/CS
GLCO
SCL
SDA
Y (9~0)
C (9~0)
54
43 ~
50 ~
47 ,
66 ,
57 ~
63 ~
60 ,
70
69 ~

-7-
IC Block Diagrams (On the ASSY, PWB, MAIN)
IC1200 < AV Switch> LA79500E
VIDEO BLOCK
TV1 71 CLAMP
TV2 75 CLAMP
CV1 78 CLAMP
CV2 6CLAMP
CV3 14 CLAMP
CV4 34 CLAMP MUTE 0 or 6dB AMP.
VOUT1
64
MUTE 0 or 6dB AMP.
VOUT2
56
MUTE
0 or 6dB AMP.
VOUT3
46
Y1 80 CLAMP
Y2 8CLAMP
Y3 16 CLAMP
Y4 36 CLAMP
YCOMB 65 CLAMP
Y5 21 CLAMP
MUTE
MUTE
0 or 6dB AMP.
Y/VOUT1
62
+
0 or 6dB AMP.
Y/VOUT2
54
Y6 28 CLAMP
0 or 6dB AMP.
COUT1
60
C1 2BIAS
C2 10
C3 18
C4 38
MUTE
CCOMB 68
MUTE 0 or 6dB AMP.
COUT2
52
MUTE
MUTE
+
PR5 25 CLAMP
PR6 32 CLAMP
PB5 23 CLAMP
CLAMP
MUTE
MUTE
MUTE
MUTE
0 or 6dB AMP. PROUT1
57
0 or 6dB AMP. PBOUT1
58
0 or 6dB AMP. PROUT2
49
0 or 6dB AMP. 50
BIAS
BIAS
BIAS
BIAS
PBOUT2
PB6 30

IC Block Diagrams (On the ASSY, PWB, MAIN)
-8-
IC1200 < AV Switch> LA79500E
AUDIO BLOCK
TV1L 70 BIAS
TV2L 74
V1L 79
V2L 7
V3L 15
V4L 35 MUTE 0 or 6dB AMP.
LOUT1
61
MUTE 0 or 6dB AMP.
LOUT2
53
MUTE
0 or 6dB AMP.
LOUT3
47
BIAS
BIAS
BIAS
BIAS
BIAS
CP5L 22
CP6L 29 BIAS
BIAS
TV1R 72 BIAS
TV2R 76
V1R 1
V2R 9
V3R 17
V4R 37 MUTE 0 or 6dB AMP.
ROUT1
59
MUTE 0 or 6dB AMP.
ROUT2
51
MUTE
0 or 6dB AMP.
ROUT3
45
BIAS
BIAS
BIAS
BIAS
BIAS
CP5R24
CP6R31 BIAS
BIAS

IC Block Diagrams (On the ASSY, PWB, MAIN)
-9-
IC7209 < Stereo D/A Converter > CS4334-KSZ
6
1
7
AOUTL
2
8
3
4
AOUTR
Interpolator
Host
Interface
5
VA
∆∑
Modulation
Interpolator
Serial Input
Interface De-emphasis
MCLK
∆∑
Modulation DAC
Analog
Low-Pass
Filter
Analog
Low-Pass
Filter
LRCK
DEM/SCLK
SDATA
AGND
Voltage Reference
DAC

IC Block Diagrams (On the ASSY, PWB, POWER)
-10-
IC602 MR4010-7101
IC601 < Transition-mode PFC Controller > L6562D
INV
+
UNTERNAL
SUPPLY 7V
6
8
1
7
5
234
Vcc
GND
COMP MULT CS
GD
ZCD
VOLTAGE
REGULATOR
MULTIPLIER AND
THD OPTIMIZER
OVERVOLTAGE
DETECTION
+
25V +
R2
R1
VREF2
UVLO
2.1V
1.6V
ZERO CURRENT
DETECTOR
+
DISABLE
40K
5µF
R
S
Q
DRIVER
STARTER
Start
stop
15V
Vcc
(Zero Current Detector)
VIN
1
7
5
2
3
4
VUL
GND
VCC Collector
Emitter/OCL
F/B
Z/C
+
R
SQQ1
9
Start-up
Circuit
++
Vcc(start-up off)
/Vcc(start-up on)
Start-up circuit
UVLO comparator
Latch circuit
reset comparator UVLO
comparator
+
VOVP
Vcc(start)
/Vcc(stop)
OVP
comparator
Thermal Shutdown
Circuit
Zero Current
Detection Circuit
+
Turn-on
Dead Timer
Standby
Circuit
R
SQ
Soft Drive
Circuit
+
On width
Timer
IF/B
Vref
(Zero Current
Detection
Terminal)
(Feed Back
Terminal)
+
OCP threshold compatator
VTH (OCL)
+
VTH (Burst Limit)
Burst mode OCP
threshold compatator Re-start
Timer