Service Manuals, User Guides, Schematic Diagrams or docs for : TOSHIBA TV TOSHIBA 20AF41
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SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter the Service Mode, press both set key and remote control key for more than 1 second.
Set Key Remocon Key Operations
VOL. (-) MIN 0 Releasing of V-CHIP PASSWORD.
Initialization of the factory.
VOL. (-) MIN 1
NOTE: Do not use this for the normal servicing.
POWER ON total hours is displayed on the screen.
Refer to the "CONFIRMATION OF USING HOURS".
VOL. (-) MIN 6
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "NOTE FOR THE REPLACING OF MEMORY IC".
Writing of EEPROM initial data.
VOL. (-) MIN 8
NOTE: Do not use this for the normal servicing.
Display of the Adjustment MENU on the screen.
VOL. (-) MIN 9
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
CONFIRMATION OF USING HOURS
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
ADDRESS DATA
1. Set the VOLUME to minimum.
2. Press both VOL. DOWN button on the set and Channel INIT 00 83 Initial setting content of MEMORY IC.
button (6) on the remote control for more than 1 second.
3. After the confirmation of using hours, turn off the power. CRT ON 0010 POWER ON total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
FIG. 1 + (ones digit value)
NOTE FOR THE REPLACING OF MEMORY IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
INI +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
00 A1 C3 CF 00 31 B3 27 37 BE E8 F4 84 00 00 00 46
10 40 --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Table 1
1. Enter DATA SET mode by setting VOLUME to minimum.
2. Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 1 second.
ADDRESS and DATA should appear as FIG 1.
3. ADDRESS is now selected and should "blink". Using the VOL. UP/DOWN button on the remote, step through the
ADDRESS until required ADDRESS to be changed is reached.
4. Press ENTER to select DATA. When DATA is selected, it will "blink".
5. Again, step through the DATA using VOL. UP/DOWN button until required DATA value has been selected.
6. Pressing ENTER will take you back to ADDRESS for further selection if necessary.
7. Repeat steps 3 to 6 until all data has been checked.
8. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
The unit will now have the correct DATA for the new MEMORY IC.
A B C D E F G H
8
MICON / TUNER SCHEMATIC DIAGRAM (MAIN PCB) 8
OS101
ACCESORY TU001 NJH3022U268
PIC-23143SY2
3 ADRES
1
2
3
4
5
6
173979-6
1 AGC
5 SDA
7 BPL
4 SCL
9 BTL
15
13
6 V.S
2 NC
10 NC
11 IF
TEST POINT
1 Vout
3 GND
2 B+
BT001
8
R.OUT
I2C SDA
I2C SCL
I2C OFF
GND
AGC
R03(AB)E_20_T
14
12
W801
NC
NC
NC
NC
NC
0
0
1.3
5.0
5.0
5.0
1.3
6.2
4.6
30.0
CP101
16V10 KA 0
C123 5.0
4.9
TM101
R006
R007
BT002 SBKMOP006A
270
270
R03(AB)E_20_T C007
7 7
6.3V 2200 YK
HZ30-3L
0.01 B
0.01 B
D001
C008
R111
C002
100P CH
100P CH
47
AGC
TP001
0.022 M
R127
R130
0.01 B
820
1K
C004
C001
FROM/TO CHROMA/IF
C005
C006
H-BUFFER
C003
Q102 R.OUT
4.8 4.8
0 2SC2412K
27K 1W
50V2.2 KA AGC
R001
RED LED 0
33K 1/4W
10K 1/4W
R129 2.2K
0.0022 B
C120
SCL
1 B
0.01 Y
V-BUFFER 0 0
R128
R131
R132
C138
C135
POWER ON
15K
Q101 SDA
D109
2SC2412K
IF
R139
MICON OSD_R
SLR-342VCT32
R154
10K
IC101 OEC7054A 1K 1/4W
0.0022 B
150 1/4W
OSD_G
R123
C112
0
R137
4.8
6 6
52
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