UNITED TVC5044, Service Manual

Page: 19 / 92

1-6-1 T6627EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note:
"CBA" is abbreviation for "Circuit Board
Assembly."
NOTE:
Electrical adjustments are required after replacing
circuit components and certain mechanical parts.
It is important to perform these adjustments only
after all repairs and replacements have been com-
pleted.
Also, do not attempt these adjustments unless the
proper equipment is available.
Test Equipment Required
1. PAL Pattern Generator (Color Bar, Monoscope,
Black Raster, White Raster, Sympte)
2. SECAM Pattern Generator (Gray Scale)
3. AC Milli Voltmeter (RMS)
4. Alignment Tape (FL6A), Blank Tape (E180)
5. DC Voltmeter
6. Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div,
F-Range: DC~AC-60MHz
7. Frequency Counter
8. Plastic Tip Driver
9. RF input (at each broadcasting system)
Receiving Channel : VHF Low
Input level : 80dB
µ
V
10.Ext.input
FRONT VIDEO-IN JACK or REAR SCART JACK
How to Set up the Service mode:
NOTE:
After replacing the IC202 (Memory) or Main CBA,
the set value in IC202 (Memory) will be lost. So it
is necessary to set up or adjust in the Service
mode after its replacement.
Service Mode:
1. Turn the power on. (Use main power on the TV
unit.)
2. Press [STANDBY/ON], [2], [7], [1], and [MUTE] but-
tons on the remote control unit in that order within 5
seconds.
- To cancel the service mode, press [STANDBY/ON]
button on the remote control.
How to set up the option code
1. Enter the Service mode.
2. Press the [STATUS] button on the remote control
unit. The option code appears on the display.
3. If needed, input the option code (0178) using num-
ber buttons on the remote control unit.
4. To reset the software, press [PAUSE] and [5] but-
tons on the remote control unit.
The option code is changed.