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Popular Toshiba 20VL14 Manual Pages
Service Manual - Page 1
SERVICE MANUAL
FILE NO. 050-200415
LCD TELEVISION
20VL14
DOCUMENT CREATED IN JAPAN, May, 2004
Service Manual - Page 2
......23 SCALER MEMORY...24 VIDEO DECODER ...25 V-CHIP & CC ...26 AUDIO PROCESSOR...27 POWER AMPLIFIER...28 AV SWITCH ...29 NTSC TUNER ...30 USA MTS ...31 PANEL CONNECTOR ...32 POWER SYSTEMS ...33 I/O CONNECTOR ...34 USA 480P ...35 IR BOARD...36 EARPHONE BOARD ...37 KEYPAD BOARD...38 CHASSIS AND CABINET REPLACEMENT PARTS LIST 39 20VL14...39 SPECIFICATIONS ...41
2
Service Manual - Page 3
... or wear gloves when servicing with the original scheme. therefore, use only replacement parts that have the necessary safety characteristics such as that used originally. Also make sure that the insula- Remodelling can result in accordance with the power on the model, use the replacement parts specified for the particular model when making repairs. which use a 500V insulation...
Service Manual - Page 4
...
The caution items shown here describe major safety issues and should always be physical damage in the event of operational error.
WARNING
Indicates a hypothetical situation in which service personnel and nearby third parties, or even end users after the service operation is forbidden. The actual meaning of the various indications are as follows.
Service Manual - Page 5
....
Wipe off with alcohol, etc., and rinse thoroughly with running water. Do not drop the cleaner on the panel. Do not disassemble the LCD module. Such actions could result in the specifications. The gas generated by drop the cleaner on the panel screen for an extended period of fluid from the screen.
5.
Service Manual - Page 6
LOCATION OF CONTROLS
TV Front
VOLUME -/+ TV/VIDEO
Headphones Jack
TV Rear
AV1
Audio (R) Audio (L)
Video S-Video
PR PB Y
Power Jack
Channel / Power button
Blue LED Indicator (Power On)
Red LED Indicator (Stand by)
Audio Output (R) Audio Output (L)
Audio (R) Audio (L) Video S-Video
AV2
ANT In
6
Service Manual - Page 7
... to raise the volume; DISPLAY Press to set the sleep timer.
7 Number Buttons allow direct access to delete a channel; press - SKIP ON/OFF Press to channel positions. MTS Press to toggle the display information on and off . TV selects TV antenna as the input signal. POWER turns the TV on and off. VOL +/- the channel...
Service Manual - Page 20
... bar signal with originals. Voltage reading shown are nominal values and may vary ±20% except H.V.
20 SCHEMATIC DIAGRAMS
WARNING
BEFORE SERVICING THIS CHASSIS, READ THE WARNINGS AND CAUTIONS IN THE PREFACE.
Before replacing any of replacements is shown in the parts list. Do not degrade the safety of 10 watt K = ±10% G = ±2% F = ±1% 2. Voltages...
Service Manual - Page 21
... AUDIO_R_OUT
07-Audio_Processer
AN5832SA
MTS_OUT_R MTS_OUT_L
TV_M 11-TV_MTS
I2C_SCL I2C_SDA
I2C_SCL I2C_SDA
+19V~12V
PANEL_ON
HIGH active
SYS_ON
LOW active
AMP_POWER
13-Power TDA7499
HIGH active
AUDIO_L_OUT AUDIO_R_OUT
08-Audio_AMP
MUTE_AUDIO
HIGH MUTE
AUDIO_OUT_R AUDIO_OUT_L
PANEL_ON SYS_ON AMP_POWER
MUTE_AUDIO 02-MCU
VOL_DOWN_KEY VOL_UP_KEY
CH_DOWN_KEY CH_UP_KEY INPUT_KEY...
Service Manual - Page 22
... SD5 SD7 EA SA14 SA12 SA10 SA8 RESET
JP1
1
2
3
4
5
6
7
8
9
10
11 12
13 14
15 16
17 18
19 20
21 22
NI
SD0 SD2 SD4 SD6 ALE PSEN SA15 SA13 SA11 SA9
+5VSB
I2C_SDA I2C_SCL
J2
1 2 3 4
NI/4 pin head
TXD
CN21
1... 5
1M/0603 R165
Y4
14.318MHZ/49US/DIP
1Y
Y2
3G
C246 27P/0603/NPO/50V
VCC9
18 19 20 21 22 23 24 25 26 27 28
P3.6/WR P3.7/RD XTAL2 XTAL1 VSS NC P2.0/A8 P2.1/A9 ...
Service Manual - Page 28
POWER AMPLIFIER 28
OFF_MUTE 6
Q25
1N4148(BAS32L)/SMD
SMBT3906/SOT23 SMD D12
2
3
1
2
VAU
R184 150/0805
D13
2
1
D11 1
VCC 2
1N4148(BAS32L)/SMD
L34
R186 ...
1
D15 NI/SMD
+ C284
C283 104P/0603/Y5V/50V
2
100UF/25V/6*11
C277 NI/0603
C281 NI/0603
AUDIO_OUT_L 5 AUDIO_OUT_R 5
GND GROUND
Title
POWER AMPLIFIER
Size A4
Date:
Document Number
TDA7499 2X6W
Sheet
11 of
Rev 0.01
14
Service Manual - Page 29
...-R V1-L V1-R V2-L V2-R V3-L V3-R STV-L STV-R SCL SDA MUTE
BIAS 38
Lout1 36
Rout1 35
Lout2 26
Rout2 24
S2 S1 ADR
12 6 20
GND GND GND
28 22 33
100/0603
R146
MM1492A SMD
NI/0603
C142
22uF/16V/4*5
R135
5.1K/0603
R136
5.1K/0603
AUDIO_OUT_L
AUDIO_OUT_R
VCC9A...
Service Manual - Page 33
POWER SYSTEMS
+
33
CN1
VIN GND
NC
1 2 3
DC_JACK 2.1 90D
R57 NI/1206
LF1 1 PS
PF 2
VFL C73 104P/0603/Y5V/50V
4 SS
SF 3
EMI XFR4 9uH ...
2
1
C103 105P/0603/Y5V/10V
+ C104
470UF/25V/8*14
1
102P/0603/X7R/50V 8.2K/0603
10K/0603
D4 SS14(1N5819) SMD
R97 1K/0603 1%
Title
POWER SYSTEMS
2
Size Document Number
TL1451 / CEM9435A
Rev 0.01
Date:
Sheet
4
of
14
Service Manual - Page 39
...replacements is to be identical with types identical to include the Model number and Description.
20VL14
Safety Location No. The mounting position of the receiver through improper servicing. TOSHIBA SN Parts No. (GOLANA)
Description
U001
72001907 AFT0-1020001715
A/D BD Sub Ass'y-20"
Specification... EFB1-5534200000
Hinge
Hinge 20VL14
User's Manual-(20VL14)CN14
GT140/201A English ...
Service Manual - Page 41
...apparatus.)
Owner's Manual
Design and specifications are manufactured using an extremely high level of a malfunction. LCD display panels are...LCD TV. SPECIFICATIONS
Television System Power Source Power Consumption Display Audio Power Speaker Type Video/Audio Terminals
Dimensions Weight Supplied Accessories
NTSC standard
120V AC, 60 Hz DC 19V / 3.4A (TV input)
48W (average)
TFT Active Matrix LCD...
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