Sharp 14D1-S/G/W and 14D2-S/G - 18 system color
television
Service mode and adjustments
This model's setting are adjusted in two different ways: through the I2C bus control and in the conventional analog manner. The adjustments via the I2C bus control include preset-only items and variable data.
CAUTION: Make sure TV Set is in "Normal Condition" before switch to Service Mode for adjustment.
Setting the service mode by the microprocessor
Short JA 137 & JA 138 for 1 second and release to switch to the service mode position, and the microprocessor is in input mode. (Adjustment through the I2C bus control). (Use JWS Key to set as well).
Press the CH DOWN / UP key on the remote controller to get ready to select the mode one by one.
Press the CH DOWN / UP key on the remote controller to select the modes reversibly one by one.
Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.
Short JA 137 & JA 138 for 1 second and release to switch to the normal mode (OFF) position, and the microprocessor is in out of the service mode.
Factory Presetting.
Short JA 137 & JA 138 then turn "ON" the main power and release to switch to the Service Mode position.Initial values are automatically preset, only when a new EEPROM is used (Judge with the first 4 bytes )
The initial data are preset as listed here.
Make sure the data need modify or not (Initial data).
Note: Once the chassis has been assembled together and ready to be POWER ON for the FIRST TIME, make sure to short JA137 & JA138 to switch to the service mode position first and then turn on the main power switch.
If haven't done this initiation, it may possibly generate excessive Beam current.
AFTER SHORT JA 137 & JA 138 ,AND TURN ON THE MAIN
POWER SWITCH,READ DATA FROM EEPROM ADDRESS 00H ~ 03H,AND COMPARE TO THE LIST
BELOW, IF DIFFERENT, INITIALIZE THE EEPROM.
Direct Key-in for Service Item in Service Mode
INITIAL SETTING
In service mode,
After execute select POS 1, store the following tuning data in E2PROM.
Note: All sound system of following channels will be set to B/G or I after
pressing INITIAL KEY 2, 3 or 4.
Shipping setting and checking
GA1 Hotel mode application
How to enable or disable the hotel mode.
Press the R/C [function] (1) key until language selection appear, withing five second press the [one/two digit] {2} key and keep pressing it for five second, then you can cee the hotel mode with four digits password.
Key in the four digit password number 1,3,7,9, then the hotel mode will be enabled, and you can switch on/off the hotel mode by using R/C [volume up/ volume Dn {3} key.
It is recommended before set the hotel mode, is better to chose ch1 & set S-Vol level up to 75% full scale. After set hotel mode, starting channel will be always ch-1 and maximum sound out will be set the half of the full scale.
If you set hotel mode in AV, starting channel will be the last channel which you received before power off [same as normal operation.
Condition
When using the hotel mode, user can cantrol contrast, brightness, sharpness and tint function.
You can’t use:
Preset mode
Fine tuning
Skip mode
System selection
The other function is allowed to be used.
SCHEMATIC DIAGRAM:CRT UNIT and SCHEMATIC
DIAGRAM:HEADPHONE UNIT
SCHEMATIC DIAGRAM:MAIN UNIT (14D1-S/G/W)
SCHEMATIC DIAGRAM:MAIN UNIT (14D2-S/G)
PWB
