4. 3P66SN Service Modes
Service Modes
EN 9 3P66
4.
4.1. Enter and exit service mode4.1. Enter and exit service mode
a. Enter "factory service mode" Press "MENU","Q.VIEW" and "PP" in turn.：
b. Enter "design service mode" : After entering "factory service mode",select"SC"item,then press "8","9"keys.
(Normally "design service mode"is not needed for production line.)
c. Exit service mode: Press"DISPLAY"key to exit service mode.
Adjustment:
In service mode,pressing digital keys directly can enter the corresponding page,pressing "MENU"key can enter
the next page,pressing "SCAN"key can enter prevenient page.
Pressing "UP"and"DOWN"keys can select the items to adjust, pressing"LEFT" and"RIGHT"keys can adjust the
values.
4.2. BUS OPEN mode4.2. BUS OPEN mode
In service mode, pressing"MUTE"key can enter "BUS OPEN"mode, which is useful for white balance adjustment
using AUTO WHITE BALANCE EQUIPMENT or mass data written into EEPROM. IC. Pressing"MUTE"key again
can exit "BUS OPEN" mode.
4.3. VG2 adjust mode4.3. VG2 adjust mode
Two methods to adjust VG2 voltage:
(1) OSD mode:
This mode is for sets with AKB function(page10 "VG2-MODE"is set to 1 and hardwire is with CCC loop ), adjust
the VG2 potmeter on the FBT till "OK" is displayed.
(2) Horizontal line mode:
This mode is for sets without AKB function(page 10"VG2-MODE" is set to 0 and hardwire is without CCC loop),
adjust the VG2 potmeter on the FBT untill the faint horizontal line appears in dark room(usually only one colour:
Red ,green or blue.
*Note:VG2 voltage is also controled by"VG2-BRI"on page (5).
*Note:
4.4. FACTORY mode4.4. FACTORY mode
In service mode, pressing"PP"key can erter "FACTORY MODE", which is useful for aging in production lines.
Pressing "PP"key again can exit "FACTORY MODE".
4.5. RF AGC adjustment4.5. RF AGC adjustment
a. Receive 571.25MHz , 60dB color bar signal.
b. Enter factory mode and press digital key "03".
c. Measure tuner AGC point voltage, and adjust AGC item till the voltage is (or till picture noise just2.7V 0.1V
disappears) Usually the AGC value is fixed to 20.。
4.6. FOCUS adjudtment4.6. FOCUS adjudtment
a. Receive cross-hatch pattern signal.
b. Set picture to"RICH" mode.
c. Adjust FBT's FOCUS knob till picture is clear.
4.7. SCREEN VOLTAGE adjustment4.7. SCREEN VOLTAGE adjustment
a. The TV set will be set up in the "AV" "STANDARD" mode, no signal input.
b. Enter into adjust factory mode, and press "03" keys to choose "Vg2" item, it will be permitted to enter light
Line mode.
c. In light-Line mode, Rotating screens potential for grid-line level so you can adjust. Press "CH+."or "CH-." Key ,
the by-line can be returned to the state in full screen mode, and then exit it.
4.8. Aging of machine mode4.8. Aging of machine mode
a. When enter into factory mode state, pressing P.P. key will be permitted to enter Aging of machine mode.
b.Press "8"key and "9"key one by one button exit aging mode .
4.9. BTSC alignment method(3P66SN)4.9. BTSC alignment method(3P66SN)
a. FLUKE 54200 trasmitting colour bar Signal frequency at 61.25MHZ Signal strength at 80dB Test 3 under，，，
BTSC settings sound frequency at 300HZ Input signal to 3P66SN Latam RF, turn on TV.（）。
