Sanyo dp23845 schematic

Specifications

Power Rating . . . . . . . . . . . . . . . . . . . . . . . . 120VAC

92W (Avg), 1.6A (Max)

Antenna Input Impedance . . . . . . . . . . . . . . . . . 75Ω

UHF/VHF/CATV

Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),

14 - 69 (UHF),

01, 14-94, 95-125 (CATV)

Remote Ready . . . . . . . . . . 25 Key Remote Control

Sound Output . . . . . . . . . . . . . . . . . . . . . . 2.0 W/CH

Intermediate Frequency

Picture IF Carrier. . . . . . . . . . . . . . . . . . 45.75MHz

Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz

Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz

LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . V230W1-L02

Cabinet Dimensions

Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 692mm

Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385mm

Depth including base . . . . . . . . . . . . . . . . 181mm

REFERENCE No. SM780108

DP23845, N2TF, PRODUCT CODE 111377005

Contents

Safety Instructions . . . . . . . . . . . . . . . . . . 2

Service Adjustments . . . . . . . . . . . . . 3 - 14

Power Failure Circuit . . . . . . . . . . . . . . . 15

Mechanical Disassemblies. . . . . . . 16 – 17

Chassis Electrical Parts List . . . . . . 18 - 33

Cabinet Parts List . . . . . . . . . . . . . . . . . . 34

Component and Test Point

Locations . . . . . . . . . . . . . . . . . . . 35 – 39

Block Diagrams . . . . . . . . . . . . . . . . 40 – 45

Trouble Shooting Flow Charts . . . . 46 – 48

Control Port Functions. . . . . . . . . . . 49 – 50

Schematic Notes . . . . . . . . . . . . . . . . . . . 51

Pin Layouts. . . . . . . . . . . . . . . . . . . . . . . . 51

Capacitor and Resistor Codes . . . . . . . . 52

Schematic Diagrams . . . . . . . . . . . . 53 - 64

AS

FILE NO.

SERVICE MANUAL Remote Control Digital

Color Television

DP23845 (U.S.A.)

(CANADA)

ORIGINAL VERSION

Chassis No. 23845-00

NOTE: Match the Chassis No. on

the unit’s back cover with
the Chassis No. in the
Service Manual.

If the Original Version
Service Manual Chassis
No. does not match the
unit’s, additional Service

Literature is required. You
must refer to “Notices” to the
Original Service Manual
prior to servicing the unit.

— 2 —

SAFETY INSTRUCTIONS

SAFETY PRECAUTIONS

1. Comply with all caution and safety-related notes provided
on the side of the cabinet, inside the cabinet, and 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, shields and barriers.

3. Before replacing the back cover of the set, thoroughly
inspect the inside of the cabinet to see that no stray parts
or tools have been left inside.

ANTENNA COLD CHECK

Remove AC plug from the 120 VAC outlet and place a
jumper across the two blades. Connect one lead of an ohm­meter to the jumpered AC plug, and touch the other lead to
each exposed antenna terminal (UHF and VHF antenna ter­minals). The resistance must measure between 1M ohm and

5.2M ohm. Any resistance value below or above this range

indicates an abnormality which requires corrective action.

LEAKAGE CURRENT CHECK

Plug the AC line cord directly into a 120 VAC outlet. (Do not
use an isolation transformer for this check.) Use an AC volt­meter, that has 5000 ohms per volt or more sensitivity.
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15 µF
150 VAC capacitor, between a known good earth ground
(water pipe, conduit, etc.) and all exposed metal parts of the
cabinet (antennas, handle bracket, metal cabinet, screw
heads, metal overlays, control shafts, etc.). Measure the AC
voltage across the 1500 ohm resistor. The AC voltage
should not exceed 750 mV. A reading exceeding 750 mV
indicates that a dangerous potential exists. The fault must
be located and corrected. Repeat the above test with the
receiver power plug reversed.

NEVER RETURN A RECEIVER TO THE CUSTOMER
WITHOUT TAKING THE NECESSARY CORRECTIVE ACTION.

PRODUCT SAFETY NOTICE

When replacing components in a receiver, always keep in
mind the necessary product safety precautions. Pay special
attention to the replacement of components marked with a
star () in the parts list and in the schematic diagrams. To
ensure safe product operation, it is necessary to replace
those components with the exact same PARTS.

AC OUTLET

READING SHOULD NOT EXCEED 750 mV.

(5000 ohms per volt or more sensitivity)

TELEVISION

RECEIVER

To be touched to all of exposed metal parts.

Voltmeter Hook-up for Leakage Current Check.

AC VOLTMETER

1500 ohm

10 watt

0.15 µF 150V AC

Good earth ground
such as a water pipe,
conduit, etc.

GENERAL

This set has an On-screen Service Menu system included in
the CPU that allows remote operation for most of the ser­vice adjustments.

ON-SCREEN SERVICE MENU SYSTEM

1. Enter the Service Menu:

•While pressing the Volume (–) button on the televi-

sion, press the Number Key 1 on the remote control
unit. The Service Menu will now appear.

2. Service Adjustments:

•Press the  or  key to select the desired service

menu item you want to adjust. See page 4 for the
On-screen Service Menu.

Note: Press the Mute key to skip up 16 items.

•Use the + or – key or number keys to adjust the data.

The + or – keys will increase or decrease the data
sequentially. The number keys (0 ~ 7) toggle only
their respective bits between 1 and 0 and are used to
change the Sub-Address. For example to change bit
5 press the number 5 key. See below.

Note: Using the + or – is not recommended due to possi-

ble rapid changes.

3. Exit from the Service Menu:

•Press the MENU key to turn off

the Service Menu display.

Item No.

Hexadecimal

Data

Binary Data

Title

— 3 —

SERVICE ADJUSTMENTS

Service Menu Display

(b7) (b6) (b5) (b4) (b3) (b2) (b1) (b0)

0 1 0 1 0 1 1 0

BINARY DATA
(8 bit)

Menu:

Exit Service Menu

 : Select Item

Volume + / –:

Adjust Service Menu

Mute:

Skip Next 16 items

Numeric:

1:

Enter Service Menu

0, 1, 2, 3, 4, 5, 6, 7:

Change Binary Data

1, 3, 4, 6, 7, 9:

Adjust White Balance

Volume – : Enter Service Menu

255_ 255
255 / 255 / 255
255 : 255 : 255__00000

M016___S0A __TV____RC00
V_ENH__GAIN__TV
000____01__00000001



POWER

CH



VOL

POWER

RESETINPUT

1 2 3

123

4 5 6

456

7 8 9

789

CAPTION SLEEP

MENU

CH

VOL VOL

MUTE

CH

V-GUIDE

0

0

RECALL

DISPLAY

PIX SHAPE

000 V ENH GAIN TV 01h RF input
001 V ENH GAIN OTHER 01h Except RF
002 V ENH MAX POINT TV 03h RF input
003 V ENH MAX POINT OTHER 03h Except RF
004 V ENH SLICE LEVEL TV 00h RF input
005 V ENH SLICE LEVEL OTHER 00h Except RF
006 FENH TV 01h RF input
007 FENH OTHER 01h Except RF
008 SHARPNESS GAIN TV 01h RF input
009 SHARPNESS GAIN OTHER 01h Except RF
00A SHARPNESS SLICE LEVEL TV 00h RF input
00B SHARPNESS SLICE LEVEL OTHER 00h Except RF

00C FBCLMPEX 01h
00D NOISE CANCEL TV 00h RF input
00E NOISE CANCEL OTHER 00h Except RF
00F SET DELAY–TV 0Dh RF input

010 SET DELAY–Video 0Bh Composite Video input
011 SET DELAY–OTHER 08h Except RF and Composite Video input
012 LTI GAIN TV 03h RF input
013 LTI GAIN OTHER 03h Except RF
014 LTI SLICE LEVEL TV 00h RF input
015 LTI SLICE LEVEL OTHER 00h Except RF
016 CTI GAIN TV 03h RF input
017 CTI GAIN OTHER 03h Except RF
018 CTI SLICE LEVEL TV 00h RF input
019 CTI SLICE LEVEL OTHER 00h Except RF

01A CONTRAST TV 30h RF input, (See Service Adjustments)
01B CONTRAST AV 30h Video1/2, Composite, S input
01C CONTRAST 480i/p 30h 480i/p input
01D CR OUTPUT GAIN TV 03h RF input
01E CR OUTPUT GAIN AV 03h Video1/2, Composite, S input
01F CR OUTPUT GAIN 480i/p 03h 480i/p input

020 CB OUTPUT GAIN TV 03h RF input
021 CB OUTPUT GAIN AV 03h Video1/2, Composite, S input
022 CB OUTPUT GAIN 480i/p 03h 480i/p input
023 CR OFFSET–TV 00h RF input
024 CR OFFSET–AV 00h Video1/2, Composite, S input
025 CR OFFSET–480i 01h 480i input
026 CR OFFSET–480p 00h 480p input
027 CB OFFSET–TV 00h RF input
028 CB OFFSET–AV 00h Video1/2, Composite, S input
029 CB OFFSET–480i 00h 480i input

02A CB OFFSET–480p 01h 480p input
02B HUE–TV 00h RF input
02C HUE–AV 00h Video1/2, Composite, S input

— 4 —

ON-SCREEN SERVICE MENU

No. Name Initial Data Note

• All data except in gray box area is fixed. Do not change for correct operation.

• Data in gray box is initial. Can be set according to adjustment information.

02D HUE–480i/p 00h 480i/p input
02E TOF TV 01h RF input
02F TOF OTHER 01h Except RF

030 Y–CLAMP–MAIN 00h Except 480i/p
031 Y–CLAMP–480i 6Dh 480i input
032 Y–CLAMP–480p 6Dh 480p input
033 C–CLAMP–MAIN 00h Except 480i/p
034 C–CLAMP–480i 00h 480i input
035 C–CLAMP–480p 80h 480p input
036 C–CLAMP F–MAIN 00h Except 480i/p
037 C–CLAMP F–480i 6Fh 480i input
038 C–CLAMP F–480p 6Dh 480p input

039 COL–KILLER TV 07h RF input
03A COL–KILLER AV 07h Video1/2, Composite, S input
03B ACC TV 08h RF input
03C ACC AV 08h Video1/2, Composite, S input
03D PLL–TV AMP1 00h RF input
03E PLL–TV AMP2 04h ↓
03F PLL–TV AMP3 05h ↓

040 PLL–TV GAIN1 0Eh ↓

041 PLL–TV GAIN2 05h ↓

042 PLL–TV GAIN3 06h ↓

043 PLL–AV AMP1 00h Video1/2, Composite, S input

044 PLL–AV AMP2 04h ↓

045 PLL–AV AMP3 05h ↓

046 PLL–AV GAIN1 0Eh ↓

047 PLL–AV GAIN2 05h ↓

048 PLL–AV GAIN3 06h ↓

049 PLL–480i/p AMP1 00h Video3, Component(480i/p) input
04A PLL–480i/p AMP2 04h ↓
04B PLL–480i/p AMP3 05h ↓
04C PLL–480i/p GAIN1 0Eh ↓
04D PLL–480i/p GAIN2 05h ↓
04E PLL–480i/p GAIN3 06h ↓
04F HDPH COMP 00h RF, Composite input

050 HDPH S 02h S input

051 HDPH 480i 0Eh 480i input

052 HDPH 480p 00h 480p input

053 Y NOISE LIM TV 00h RF input

054 Y NOISE LIM OTHER 00h Except RF

055 Y NOISE GAIN TV 01h RF input

056 Y NOISE GAIN OTHER 00h Except RF

057 Y NOISE TV 01h RF input

058 Y NOISE OTHER 00h Except RF

059 COL–KILLER GAIN TV 01h RF input
05A COL–KILLER GAIN OTHER 01h Except RF
05B C NOISE LIM TV 01h RF input
05C C NOISE LIM OTHER 01h Except RF
05D C NOISE GAIN TV 00h RF input
05E C NOISE GAIN OTHER 00h Except RF
05F C NOISE TV 01h RF input

— 5 —

No. Name Initial Data Note

060 C NOISE OTHER 00h Except RF
061 480i SUB–CONT 00h Component (480i) input (Difference)
062 480i SUB–BRIGHTNESS 00h ↓
063 480i SUB–COLOR 00h ↓
064 480i SUB–TINT 00h ↓
065 480i SUB–SHARP 00h ↓
066 480p SUB–CONT 00h Component (480p) input (Difference)
067 480p SUB–BRIGHTNESS 00h ↓
068 480p SUB–COLOR 0Ch ↓

069 480p SUB–TINT 00h ↓
06A 480p SUB–SHARP 00h ↓
06B AV SUB–CONT 00h Composite Video input (Standard)
06C AV SUB–BRIGHTNESS 0Fh ↓
06D AV SUB–COLOR 08h ↓
06E AV SUB–TINT 08h ↓
06F AV SUB–SHARP 10h ↓
070 S SUB–CONT 00h S Video input (Difference)
071 S SUB–BRIGHTNESS 00h ↓
072 S SUB–COLOR 00h ↓
073 S SUB–TINT 00h ↓
074 S SUB–SHARP 00h ↓
075 RF SUB–CONT 00h RF input (Difference)
076 RF SUB–BRIGHTNESS 00h ↓
077 RF SUB–COLOR 00h ↓
078 RF SUB–TINT 00h ↓
079 RF SUB–SHARP 00h ↓
07A 720p SUB-CONT 00h Component(720p) input (Difference)
07B 720p SUB-BRIGHT 00h ↓
07C 720p SUB-COLOR 00h ↓
07D 720p SUB-TINT 00h ↓
07E 720p SUB-SHARP F8h ↓
07F 1080i SUB-CONT 00h Component(1080i) input (Difference)
080 1080i SUB-BRIGHT 00h ↓
081 1080i SUB-COLOR 00h ↓
082 1080i SUB-TINT 00h ↓
083 1080i SUB-SHARP F8h ↓
084 480i D SUB-CONT 00h DVI(480i) input (Difference)
085 480i D SUB-BRIGHT 00h ↓
086 480i D SUB-COLOR 00h ↓
087 480i D SUB-TINT 00h ↓
088 480i D SUB-SHARP 00h ↓
089 480p D SUB-CONT 00h DVI(480p) input (Difference)
08A 480p D SUB-BRIGHT 00h ↓
08B 480p D SUB-COLOR 00h ↓
08C 480p D SUB-TINT 00h ↓
08D 480p D SUB-SHARP 00h ↓
08E 720p D SUB-CONT 00h DVI(720p) input (Difference)
08F 720p D SUB-BRIGHT 00h ↓
090 720p D SUB-COLOR 00h ↓
091 720p D SUB-TINT 00h ↓
092 720p D SUB-SHARP 00h ↓

— 6 —

No. Name Initial Data Note

— 7 —

No. Name Initial Data Note

093 1080i D SUB-CONT 00h DVI(1080i) input (Difference)
094 1080i D SUB-BRIGHT 00h ↓
095 1080i D SUB-COLOR 00h ↓
096 1080i SUB-TINT 00h ↓
097 1080i SUB-SHARP 00h ↓
098 AUTO CONTRAST 0Ah Composite, S, Component input, Picture: Auto

099 AUTO TINT 22h ↓
09A AUTO COLOR 28h ↓
09B AUTO BRIGHT 20h ↓
09C AUTO SHARP 10h ↓
09D MANUAL AV CONTRAST 2Fh Composite, S, Component input, Picture: Manual
09E MANUAL AV TINT 20h ↓
09F MANUAL AV COLOR 28h ↓
0A0 MANUAL AV BRIGHT 20h ↓
0A1 MANUAL AV SHARP 10h ↓
0A2 GAME AV CONTRAST 10h Composite, S, Component input, Picture: Game
0A3 GAME AV TINT 20h ↓
0A4 GAME AV COLOR 10h ↓
0A5 GAME AV BRIGHT 20h ↓
0A6 GAME AV SHARP 07h ↓
0A7 WHITE-RF R 00h RF(TV) input, White Balance (Difference)
0A8 WHITE-RF G 00h ↓
0A9 WHITE-RF B 00h ↓
0AA BLACK-RF R 00h RF(TV) input, Black Balance (Difference)
0AB BLACK-RF G 00h ↓
0AC BLACK-RF B 00h ↓
0AD WHITE-AV R 52h Composite (AV) input, White Balance (Standard)
0AE WHITE-AV G 44h ↓
0AF WHITE-AV B 40h ↓
0B0 BLACK-AV R 30h Composite (AV) input, Black Balance (Standard)
0B1 BLACK-AV G 30h ↓
0B2 BLACK-AV B 30h ↓
0B3 WHITE-S R 00h S(AV) input, White Balance (Difference)
0B4 WHITE-S G 00h ↓
0B5 WHITE-S B 00h ↓
0B6 BLACK-S R 00h S(AV) input, Black Balance (Difference)
0B7 BLACK-S G 00h ↓
0B8 BLACK-S B 00h ↓
0B9 WHITE-480i R 00h 480i(Component) input, White Balance (Difference)
0BA WHITE-480i G 00h ↓
0BB WHITE-480i B 00h ↓
0BC BLACK-480i R 00h 480i(Component) input, Black Balance (Difference)
0BD BLACK-480i G 00h ↓
0BE BLACK-480i B 00h ↓
0BF WHITE-480p R 00h 480p(Component) input, White Balance (Difference)
0C0 WHITE-480p G 00h ↓
0C1 WHITE-480p B 00h ↓
0C2 BLACK-480p R 00h 480p(Component) input, Black Balance (Difference)
0C3 BLACK-480p G 00h ↓
0C4 BLACK-480p B 00h ↓

— 8 —

No. Name Initial Data Note

0C5 WHITE-720p R 00h 720p (Component) input, White Balance (Difference)
0C6 WHITE-720p G 00h ↓
0C7 WHITE-720p B 00h ↓
0C8 BLACK-720p R 00h 720p (Component) input, Black Balance (Difference)

0C9 BLACK-720p G 00h ↓
0CA BLACK-720p B 00h ↓
0CB WHITE-1080i R 00h 1080i (Component) input, White Balance (Difference)
0CC WHITE-1080i G 00h ↓
0CD WHITE-1080i B 00h ↓
0CE BLACK-1080i R 00h 1080i (Component) input, Black Balance (Difference)
0CF BLACK-1080i G 00h ↓
0D0 BLACK-1080i B 00h ↓
0D1 WHITE-480i D R 00h 480i (DVI) input, White Balance (Difference)
0D2 WHITE-480i D G 00h ↓
0D3 WHITE-480i D B 00h ↓
0D4 BLACK-480i D R 00h 480i (DVI) input, Black Balance (Difference)
0D5 BLACK-480i D G 00h ↓
0D6 BLACK-480i D B 00h ↓
0D7 WHITE-480p D R 00h 480p (DVI) input, White Balance (Difference)
0D8 WHITE-480p D G 00h ↓
0D9 WHITE-480p D B 00h ↓
0DA BLACK-480p D R 00h 480p (DVI) input, Black Balance (Difference)
0DB BLACK-480p D G 00h ↓
0DC BLACK-480p D B 00h ↓
0DD WHITE-720p D R 00h 720p (DVI) input, White Balance (Difference)
0DE WHITE-720p D G 00h ↓
0DF WHITE-720p D B 00h ↓

0E0 BLACK-720p D R 00h 720p (DVI) input, Black Balance (Difference)

0E1 BLACK-720p D G 00h ↓

0E2 BLACK-720p D B 00h ↓

0E3 WHITE-1080i D R 00h 1080i (DVI) input, White Balance (Difference)

0E4 WHITE-1080i D G 00h ↓

0E5 WHITE-1080i D B 00h ↓

0E6 BLACK-1080i D R 00h 1080i (DVI) input, Black Balance (Difference)

0E7 BLACK-1080i D G 00h ↓

0E8 BLACK-1080i D B 00h ↓

0E9 CT-COOL R F6h Color Enhancer: Cool
0EA CT-COOL G FBh ↓
0EB CT-COOL B 00h ↓
0EC CT-NORM R 00h Color Enhancer: Normal
0ED CT-NORM G 00h ↓
0EE CT-NORM B 00h ↓
0EF CT-WARM R 00h Color Enhancer: Warm

0F0 CT-WARM G F2h ↓

0F1 CT-WARM B 00h ↓

0F2 SHARP F0 RF 02h RF input, Sharpness: Center

0F3 SHARP F0 OTHER 02h Other input, Sharpness: Center

0F4 SHARP F0 480p 02h 480p input, Sharpness: Center

0F5 GAMMA1 01h Under APL setting value

0F6 GAMMA2 01h Beyond APL setting value

— 9 —

No. Name Initial Data Note

0F7 GAMMA APL 00h Gamma Threshold
0F8 NOSIG 00h Select Sync.
0F9 BSCB 00h Cut of Sub-Bass or Setup of Boost
0FA BSCT 00h Cut of Sub-Treble or Setup of Boost
0FB SUB-BASS 00h Setup of Cut Level of Sub Bass and Boost Level
0FC SUB-TREBLE 00h Setup of Cut Level of Sub Treble and Boost Level
0FD BBE-LOW 0Ah Setup of Low-Pass Boost Level (Lo contour)
0FE BBE-HIGH 08h Setup of High Region Boost Level (Process)
0FF AGC 00h AGC ON/OFF

100 AGC LEVEL 00h AGC Level Setup
101 WB ** White Balance Adjustment
102 BB ** Black Balance Adjustment
103 AUTO B-BRIGHT 00h Back Light Auto Bright (Absolute value)
104 BLIGHT-BRIGHT F0h Back Light Bright (PWM value)
105 BLIGHT-MID B0h Back Light Middle (PWM value)
106 BLIGHT-DARK 60h Back Light Dark (PWM value)
107 APL-SW 01h APL Switch
108 APL-PER 10h AI Cycle (8ms/step)

109 APL-LO 36h APL Low-Pass and Inside Region Threshold
10A APL-HI 48h APL Inside and High Region Threshold
10B APL-MIN 10h Gamma Minimum Value (Table No.)
10C APL-CEN 24h Gamma Center Value (Table No.)
10D APL-MAX 48h Gamma Maximum Value (Table No.)
10E APL-READ-NUM 05h Number of APL Read-out Times
10F APL-READ-PER 01h APL Read-out Cycle

110 APL-0 70h APL Read-out Value (APL=0%: Black)

111 APL-100 E0h APL Read-out Value (APL=100%: White)

112 POWER ERR 00h Power Failure History

113 OPTION **h Option Monitor (Read-out)

114 PANEL TIME1 **h Used Time of LCD Panel

115 PANEL TIME2 **h Used Time of Unit

116 OSD HP 00h OSD H-Phase

117 CCD HP 14h CCD H-Phase

118 CCD SLICER LEVEL 0Bh CCD Slicer Level

119 PASSWORD **h Password
11A VUP FULL 01h
11B VUP JUST 01h
11C VUP ZOOM 01h
11D VUP NORMAL 01h
11E VSC FULL 0Fh
11F VSC JUST 07h

120 VSC ZOOM 04h

121 VSC NORMAL 0Fh

122 HSC1 N FULL 10h

123 HSC1 N JUST 0Fh

124 HSC1 N ZOOM 0Fh

125 HSC1 N NORMAL 0Bh

126 HSC1 D FULL 1Fh

127 HSC1 D JUST 08h

128 HSC1 D ZOOM 1Eh

— 10 —

No. Name Initial Data Note

129 HSC1 D NORMAL 10h
12A HSC2 N FULL 13h

12B HSC2 N JUST 07h
12C HSC2 N ZOOM 07h
12D HSC2 N NORMAL 0Ch

12E HSC2 D FULL 0Fh

12F HSC2 D JUST 0Fh

130 HSC2 D ZOOM 0Fh

131 HSC2 D NORMAL 11h

132 HST FULL 0Ah

133 HST JUST 0Fh

134 HST ZOOM 0Fh

135 HST NORMAL 04h

136 VST FULL 34h

137 VST JUST 54h

138 VST ZOOM 7Eh

139 VST NORMAL 34h

13A VUP FULL 480p 01h

13B VUP JUST 480p 01h
13C VUP ZOOM 480p 01h
13D VUP NORMAL 480p 01h

13E VSC FULL 480p 0Fh

13F VSC JUST 480p 07h

140 VSC ZOOM 480p 04h

141 VSC NORMAL 480p 0Fh

142 HSC1 N FULL 480p 10h

143 HSC1 N JUST 480p 0Fh

144 HSC1 N ZOOM 480p 07h

145 HSC1 N NORMAL 480p 0Bh

146 HSC1 D FULL 480p 1Fh

147 HSC1 D JUST 480p 08h

148 HSC1 D ZOOM 480p 0Eh

149 HSC1 D NORMAL 480p 10h

14A HSC2 N FULL 480p 13h

14B HSC2 N JUST 480p 07h
14C HSC2 N ZOOM 480p 07h
14D HSC2 N NORMAL 480p 0Ch

14E HSC2 D FULL 480p 0Fh

14F HSC2 D JUST 480p 0Fh

150 HSC2 D ZOOM 480p 0Fh

151 HSC2 D NORMAL 480p 11h

152 HST FULL 480p 12h

153 HST JUST 480p 18h

154 HST ZOOM 480p 16h

155 HST NORMAL 480p 0Ah

156 VST FULL 480p 3Dh

157 VST JUST 480p 5Ch

158 VST ZOOM 480p 89h

159 VST NORMAL 480p 3Dh

15A VUP 480i D 01h

15B VUP 480p D 01h

— 11 —

No. Name Initial Data Note

15C VUP 720p D 01h
15D VUP 720p A 01h
15E VUP 1080i D 00h
15F VUP 1080i A 00h

160 VSC 480i D 0Ah
161 VSC 480p D 12h
162 VSC 720p D 10h
163 VSC 720p A 10h
164 VSC 1080i D 12h
165 VSC 1080i A 12h
166 HSC1N 480i D 0Fh
167 HSC1N 480p D 0Bh
168 HSC1N 720p D 10h

169 HSC1N 720p A 1Dh
16A HSC1N 1080i D 1Ch
16B HSC1N 1080i A 1Fh
16C HSC1D 480i D 1Eh
16D HSC1D 480p D 15h
16E HSC1D 720p D 11h
16F HSC1D 720p A 1Fh

170 HSC1D 1080i D 14h

171 HSC1D 1080i A 16h

172 HST 480i D 21h

173 HST 480p D 0Ch

174 HST 720p D 0Fh

175 HST 720p A 0Ah

176 HST 1080i D 0Bh

177 HST 1080i A 08h

178 VST 480i D 44h

179 VST 480p D 38h
17A VST 720p D 1Eh
17B VST 720p A 1Eh
17C VST 1080i D 1Fh
17D VST 1080i A 20h
17E H RANGE 480i 04h
17F 480I DATA1 31h

180 480I DATA2 81h

181 480I DATA3 40h

182 480I DATA4 83h

183 H RANGE 480p 02h

184 480P DATA1 71h

185 480P DATA2 81h

186 480P DATA3 80h

187 480P DATA4 83h

188 H RANGE 720p 04h

189 720P DATA1 F1h
18A 720P DATA2 83h
18B 720P DATA3 20h
18C 720P DATA4 83h
18D H RANGE 1080i 02h
18E 1080I DATA1 B1h

— 12 —

No. Name Initial Data Note

18F 1080I DATA2 83h
190 1080I DATA3 60h
191 1080I DATA4 83h
192 V RANGE 480i 17h
193 R Gain 480i D FFh
194 R Gain 480p D FFh
195 R Gain 720p D FFh
196 R Gain 720p A 42h
197 R Gain 1080i D FFh
198 R Gain 1080i A 42h
199 G Gain 480i D FFh
19A G Gain 480p D FFh

19B G Gain 720p D FFh
19C G Gain 720p A 42h
19D G Gain 1080i D FFh

19E G Gain 1080i A 42h

19F B Gain 480i D FFh

1A0 B Gain 480p D FFh

1A1 B Gain 720p D FFh

1A2 B Gain 720p A 42h

1A3 B Gain 1080i D FFh

1A4 B Gain 1080i A 42h

1A5 R offAD 480i D 00h

1A6 R offAD 480p D 00h

1A7 R offAD 720p D 00h

1A8 R offAD 720p A 00h

1A9 R offAD 1080i D 00h
1AA R offAD 1080i A 00h
1AB R off 480i D 80h
1AC R off 480p D 80h
1AD R off 720p D 80h
1AE R off 720p A 80h
1AF R off 1080i D 80h

1B0 R off 1080i A 80h

1B1 G offAD 480i D 00h

1B2 G offAD 480p D 00h

1B3 G offAD 720p D 00h

1B4 G offAD 720p A 00h

1B5 G offAD 1080i D 00h

1B6 G offAD 1080i A 00h

1B7 G off 480i D 00h

1B8 G off 480p D 00h

1B9 G off 720p D 00h
1BA G off 720p A 12h
1BB G off 1080i D 00h
1BC G off 1080i A 12h
1BD B offAD 480i D 00h
1BE B offAD 480p D 00h
1BF B offAD 720p D 00h
1C0 B offAD 720p A 00h
1C1 B offAD 1080i D 00h

— 13 —

No. Name Initial Data Note

1C2 B offAD 1080i A 00h
1C3 B off 480i D 80h
1C4 B off 480p D 80h
1C5 B off 720p D 80h
1C6 B off 720p A 80h
1C7 B off 1080i D 80h
1C8 B off 1080i A 80h
1C9 R001 00h ROM Correction Data
1CA 00h ROM Correction Data
1CB 00h ROM Correction Data

↓↓↓
↓↓↓
↓↓↓

261 00h ROM Correction Data
262 00h ROM Correction Data
263 00h ROM Correction Data

— 14 —

SERVICE ADJUSTMENTS (Continued)

WHITE BALANCE ADJUSTMENT

Composite (External Video Input)

1. Connect a color-bar generator to the external compos­ite video input terminal.

2. Switch the generator to the white pattern.

3. Set the television to following conditions:

Picture: AUTO

Color Enhancer: Normal

Back Light: Bright

Display Area: 16:9

4. Enter the Service Mode. The Menu display will appear.

5. Select “White Balance Adjustment” Menu (No. 101).

6. Adjust Red, Green, and Blue Levels alternately with 1, 3,
4, 6, 7, or 9 keys to produce normal black and white
picture in highlight areas.

The White Balance Level adjustment data will be
written automatically in the Service Menu No. 0AD(R),
No. 0AE(G), and No. 0AF(B).

Note: One or two data of RGB should be left at ”52” for

normal contrast level. Do not change the data to
more than “52.”

Other Inputs

Caution: White Balance Adjustment of Composite must

be completed before attempting other input
adjustments.

White Balance Adjustment for other modes [RF, S (Y/C),
Component (480i/ 480p)] may be unnecessary if the adjust­ment of Composite is OK.

1. Connect a color-bar generator to the preferred video
input terminal.

2. Switch the generator to the white pattern.

3. Set the television to following conditions:

Picture: AUTO

Color Enhancer: Normal

Back Light: Bright

Display Area: 16:9

4. Enter the Service Mode.The Menu display will appear.

5. Select “White Balance Adjustment” Menu (No. 101).

6. Adjust Red, Green, and Blue Levels alternately with 1, 3,
4, 6, 7, or 9 key to produce normal black and white picture
in highlight areas.

The White Balance Level adjustment data will be written
automatically in the following Service Menu:
RF No 0A7 (R), 0A8 (G), 0A9 (B)
S (Y/C) No.0B3 (R), 0B4 (G), 0B5 (B)
Component (480i) No.0B9 (R), 0BA (G), 0BB (B)
Component (480p) No.0BF (R), 0C0 (G), 0C1 (B)

BLACK BALANCE ADJUSTMENT

Black Balance Adjustment may be unnecessary if the White
Balance Adjustment of Composite is OK.

Composite (External Video Input)

1. Connect a color-bar generator to the external (compos­ite) video input terminal.

2. Switch the generator to the dark grey pattern (“30%
white” recommended).

3. Set the television to following conditions:

Picture: AUTO
Color Enhancer: Normal
Back Light: Bright
Display Area: 16:9

4. Enter the Service Mode. The Menu display will appear.

5. Select “Black Balance Adjustment” Menu (No. 102).

6. Adjust Red, Green, and Blue Levels alternately with 1,
3, 4, 6, 7, or 9 key to produce normal black and white
picture in dark grey areas. The Black Balance Level
adjustment data will be written automatically in the
Service Menu No. 0B0(R), No. 0B1(G), and No. 0B2(B).

Other Inputs

Caution: Black Balance Adjustment of Composite must

be completed before attempting other input
adjustments.

1. Connect a color-bar generator to the preferred video
input terminal.

2. Switch the generator to the dark gray pattern.

3. Set the television to following conditions:

Picture: AUTO
Color Enhancer: Normal
Back Light: Bright
Display Area: 16:9

4. Enter the Service Mode.The Menu display will appear.

5. Select “Black Balance Adjustment” Menu (No. 102).

6. Adjust Red, Green, and Blue Levels alternately with 1,
3, 4, 6, 7, or 9 key to produce normal black and white
picture in dark grey areas. The Black Balance Level
adjustment data will be written automatically in the fol­lowing Service Menu.
RF No 0AA (R), 0AB (G), 0AC (B)
S (Y/C) No. 0B6 (R), 0B7 (G), 0B8 (B)
Component (480i) No. 0BC (R), 0BD (G), 0BE (B)
Component (480p) No. 0C2 (R), 0C3 (G), 0C4 (B)
Component (720p) No. 0C8 (R), 0C9 (G), 0CA (B)
Component (1080i) No. 0CE (R), 0CF (G), 0D0 (B)
DVI (480i) No. 0D4 (R), 0D5 (G), 0D6 (B)
DVI (480p) No. 0DA (R), 0DB (G), 0DC (B)
DVI (720p) No. 0E0 (R), 0E1 (G), 0E2 (B)

1

2

3

4 5 6

7 98

RD(–)

RD(+)

BD(–)

BD(+)

(N/A)

GD(–)

(N/A)

GD(+)

(N/A)

Remote Control Number keys’ functions in Service Menu
“White Balance Adjustment”

FOR RED LEVEL ADJUSTMENT

FOR BLUE LEVEL ADJUSTMENT

FOR GREEN LEVEL ADJUSTMENT

— 15 —

CPU (IC801) is programmed so the set will go to the stand­by mode when there is circuit failure as described below.
(Refer to “Block Diagram Power Lines” and “Block
Diagram Power Board.”)

1. Power Failure 1: Detected voltage failure for digital

circuit. (Connected to IC801 pin 1.)

2. Power Failure 2: Detected voltage failure for ana-

log circuit. (Connected to IC801 pin 16.)

(Normal: High; Failure: Low)

POWER FAILURE CIRCUIT

Note: If power failure is detected 3 times in 15 minutes, the

set will enter the standby mode and cannot be
switched On. To reset the operating programs of the
CPU it is necessary to disconnect the AC cord for a
short time.

History of Power Failure

When finishing the repair or stopping the Power Failure, the
history of past failures can be checked.

To see the history

1. Enter the service mode. See “Service Adjustments”
page 3.

2. Select Item No.112 POWER ERR from the Service
Adjustment Data Table.

Note: If simultaneous failures have been detected, the

sum of each data is displayed.

For example:

Power failures 1 & 2
01h + 02h = 03h(3)

Attention:

After finishing service, reset the data of Item No. 112 with
the + or – keys to

““0000hh((00))..””

Failure Name Data

No Failure 00h(0)
Power Failure 1 01h(1)
Power Failure 2 02h(2)

History of Power Failures (Item No. 0C9)

— 16 —

STAND REMOVAL

Note: Position TV face down on a padded or cush-

ioned surface to protect the screen and finish.

Remove 4 screws to take the stand off.

MECHANICAL DISASSEMBLY

CABINET BACK REMOVAL

Remove 8 screws (B : 4X14) to take the cabinet back
(C/B) off.

Note: The cabinet back can be removed without

removing the stand.

CABINET BOTTOM REMOVAL

Press 2 hooks inside to remove the cabinet bottom
(C/BTM).

SHIELD BACK REMOVAL

Remove 6 screws (C: 3X10) to remove the shield back
(SH/B).

MOUNTING BRACKET REMOVAL

Remove a screw (D: 3X10) to remove the mounting
bracket (M/BRKT).

CAUTION: This LCD TV uses several different kinds of

screws. Using the correct screw is neces­sary to prevent damage. Lead wires must
be redressed to their previous locations
after servicing.

VHF
UHF
CATV

TUNER

B

B

B

B

C/B

B

A
A

B

STD

A
A

B

B

Hook Hook

C

C/BTM

C

C

C

SH/B

C

C

M/BRKT

D

— 17 —

MAIN BOARD REMOVAL

Remove 5 screws (E: 3X10) to remove the main board
with the terminal base (TMNL/B) and audio output jacks
(MO/JACK) (assembly parts).

RC BOARD REMOVAL

Remove a screw (F: 4X14) to remove the RC board.

POWER BOARD REMOVAL

Remove 4 screws (G: 3X10) to remove the power board
with the chassis holder (CH/HLD) (assembly parts).

CONTROL BOARD REMOVAL

Press 2 hooks inside to remove the control board with
the panel top and button assembly.

SPEAKER REMOVAL

Remove 4 holders (SP/HLD) to remove speakers.

LCD PANEL REMOVAL

1. Remove 4 screws (H: 3X10) to remove the LCD
panel with the top (HLD/PNL-T) and bottom
(HLD/PNL-B) panel holders.

2. Remove 2 screws (J: 3X10) to remove the top
panel holder (HLD/PNL-T).

3. Remove 2 screws (I: 3X10) to remove the bottom
panel holder (HLD/PNL-B).

CABINET FRONT REMOVAL

1. Complete previous disassembly procedures.

2. Remove spacer (Buffer tape) and DEC-RC
(Decoration for remote control receiver).

Note: The spacers can be reused.

Chassis Base

CONTROL

GG

CH/HLD

E

HookHook

E

Spacer

H

SP/HLD

SP/HLD

POWER

GG

E

MAIN

E

HLD/PNL-T

LCD PANEL

JJ

H

TMNL/B

MO/JACK

E

RC

SP/HLD

SP/HLD

F

Spacer

Spacer

H

HLD/PNL-B

I I

H

Spacer

DEC-RC