Service manual

12
HOW TO ACCESS THE SERVICE MODE
1. First press the VOLUME "-" button in the TV set until the volume turn to zero.
2. Keep pressing this button, then press the "status" button on the remote contol,then you can access the service mode.
Use the [MENU], [CH UP], [CH DOWN], [VOL UP] or [VOL DOWN] button to highlight the item to set ,which is
displayed in red. Other items are displayed in white.
3. Finally, press the 'PP' button to log out of the service mode.
Attention:
(1) In case the user should forget the password that has been entered, there is a “built-in” password,
that will always work: 512.
(2) The data marked with “#” are not allowed to change.
n Press [MENU] to display the Service 1 MENU.
n Press [CHANNEL UP OR DOWN] to select the highlighted item, then [VOL DOWN],or
[VOL UP] to increase or decrease the setting, The data is written to EEPROM.
n TB1238AN Adjustment Items
Rf AGC: Selects RF AGC adjustment setting is 24 in the range 00 to 3F.
V SC: Selects vertical s-correction adjustment setting is about 08 in the range 00 to 0F.
H Position50: Selects horiztion position 50 adjustment setting is 10 range 00 to 1F.
V POS 50: Selects vertical position 50 adjustment setting is 04 in the range 00 to 07.
V Size 50: Selects vertical size 50 adjustment setting is 17 in the range 00 to 3F.
V Linearity50: Selects vertical linearity 50 adjustment. Setting is 0B in the range 00 or 0F.
H Position60: Selects horiztion position 60 adjustment setting is 0F range 00 to 1F.
V POS 60: Selects vertical position 60 adjustment setting is 04 in the range 00 to 07.
V Size 60: Selects vertical size 60 adjustment setting is 16 in the range 00 to 3F.
V Linearity60: Selects vertical linearity 60 adjustment. Setting is 0A in the range 00 or 0F.
Brightn Max: Selects brightness maximum adjustment . Setting is 58 in the range from 00 to 7F.
Bright Min: Selects brightness minimum adjustment. Setting is 28 in the from 00 to 58.
Sub Tint: Selects sub tint adjustment setting is 50 in the from 00 to 7F.
PIF VCO: Selects PIF VCO adjustment setting is 80 in the from 00 to FF.
n Press [MENU] to display the Service 2 MENU.
Service 1
RF AGC 24
V SC 08
H Position 50 10
V Position 50 04
V Size 50 17
V Linearity 50 0B
H Position 60 0F
V Position 60 04
V Size 60 16
V Linearity 60 0A
Bright Max 58
Bright Min 28
Sub Tint 50
PIF VCO # 80
Service 2
Logo CONTEC
RGB Contrast 30
Sub Contrast 06
Secam B-Y 08
Secam R-Y 07
Time #0B
PREFM #00
PRE NICAM #00
PRE LINE IN #00
DRAG MULTIPE #0C
DRAG BASE #04
Hi Voltage #FF
Bus Off #01
VCO Coarse #00
VCO Fine L1 #00