Toshiba 20AS23 User manual

SERVICE MANUAL
COLOR TELEVISION
20AS23
FILE NO. 050-200333A

FILE NO. 050-200333A
DATE:Feb.,2004
RANK:
Product: COLOR TELEVISION
Model: 20AS23
SERVICE INSTRUCTION
A
TOSHIBA CORPORATION DIGITAL MEDIA NETWORK COMPANY
VISUAL MEDIA NETWORK DIV.
INTERNATIONAL CUSTOMER SERVICE & SUPPORT DEPT [11F-B]
TOSHIBA BLDG.
1-1, SHIBAURA 1-CHOME, MINATOKU, TOKYO 105-8001, JAPAN
FACSIMILE: [phone] PONE: [phone]
TOSHIBA CORPORATION
KATSUMI TSUNODA
MANAGER
INTERNATIONAL CUSTOMER
SERVICE & SUPPORT DEPT
Parts exchange and memory data change.
93612000 or younger.
Corrective action:
Applicable units:

IC199 memory data
WHEN REPLACING EEPROM (MEMORY) IC
INITIAL From To
Change of MICON IC.
Cause
0A AA
How to Change memory data
1.
2. Enter DATA SET mode by setting VOLUME to minimum. 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.
ADDRESS DATA
INIT 00 50
CRT ON 0010
00
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.
Press ENTER to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using VOL. UP/DOWN button until required DATA value has been selected.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
Repeat steps 3 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
Turn POWER on.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 1 second.
After the finishing of the initializing of shipping, the unit will turn off automatically.
3.
4.
5.
6.
7.
8.
9.
10.
11.
FIG. 1
The unit will now have the correct DATA for the new MEMORY IC.

MFR'S VERSION A MFR'S VERSION B
REF. NO. PART NO. DESCRIPTION TSB P/N PART NO. DESCRIPTION TSB P/N CAUSE
IC101 I56F07091A IC OEC7091A AD302159 I56F07091B IC OEC7091B AE002804 MICON VERSION UP
PCB010 A3M213C010 MAIN PCB ASS'Y (VERSION A)
TMC558A AE001535 A3M213C010 MAIN PCB ASS'Y (VERSION B) TMC558A AE001535
All parts are interchangeable between version.
ELECTRICAL REPLACEMENT PARTS LIST

TOSHIBA CORPORATION
1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN