Sharp 27SC26BQ Service Manual page 7

For adjustments of this model, the bus data is converted to various analog signals by the D/A converter
circuit.
Note: There are still a few analog adjustments in this series such as focus and master screen voltage.
Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if serv-
ice adjustments are required.
1. Service mode
Before putting unit into the service mode, check that
customer adjustments are in the normal mode. Use
the reset function in the video adjustment menu to
ensure customer controls are in their proper (reset)
position.
2. Service number selection
Once in the service mode, press the Ch-up or Ch-
down button on the remote controller or at the set.
The service adjustment number will vary in
increments of one, from "D01" to "M07". Select the
item you wish to adjust.
3. Data number selection
Press the Vol-up or Vol-down button to adjust the data
number.
To enter the service mode and exit serv-
ice mode.
To enter the service mode manually just press and hold
the Vol-down and Ch-up buttons at the same time, plug
the AC cord into a wall socket.
Now the TV set is switched on and enters the service
mode.
To exit the service mode, turn the television off by
pressing the power button.
DATA NUMBER
SERVICE ADJUSTMENT
NUMBER
CHANNEL
12
V05 111
Figure A.
4. Donau and Main Micon version Check
1. After television power on, press test key "0x31"
and the following screen will display.
VERSION NUMBER
ANALOG : 1.00-2-R2
DIGITAL : 1.00
* ANALOG – Main Micon IC (RH-IXB945WJQZQ)
Software Version
1 . 0 0 - 2 - R 2
Main Micon
Version
* DIGITAL – Renesas IC (Inside Tuner) Software
Version
2. The version display screen will disappear after 30
second or pressing any key (except test key) will
cancel the version display.
3. Alternatively for analog version only, go to service
mode. Press menu key/button until "INFO" page
appears in OSD. Version will display at bottom right
corner. Explanation as below
MASK : 0S
SOFT : (Main micon software ver.)
CHK1 : (ROM1 correct)
CHK2 : (ROM2 correct)
INFO
7
27SC26BQ
Number of
ROM Correct
EEPROM Version
Number
12
MASK: 0S
SOFT: V1.00
CHK1: ACT
CHK2: ACT
Figure B.