Electrical Adjustment Instructions - Durabrand DCT1303R Service Manual

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note:
"CBA" is abbreviation for "Circuit Board Assem-
bly."
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. NTSC Pattern Generator (Color Bar W/White
Window, Red Color, Dot Pattern, Gray
Scale, Monoscope, Multi-Burst)
2. DC Voltmeter
3. Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div,
F-Range: DC~AC-60MHz
4. Plastic Tip Driver
5. Remote control unit: Part No. N0105UD or N0108UD
6. DC power supply 13.2V/5A
7. Color Analyzer
How to make service remote control
unit:
1. Prepare normal remote control unit. (Part No.
N0105UD or N0108UD) Remove 3 Screws from
the back lid. (Fig. 1-1)
2. Add J1 (Jumper Wire) to the remote control CBA.
(Fig. 1-2)
SCREW
REMOTE CONTROL UNIT
REMOTE CONTROL CBA
How to set up the service mode:
Service mode:
1. Use the service remote control unit.
2. Turn the power on. (Use main power on the TV unit.)
3. Press "SLEEP" button on the service remote con-
trol unit. Version of micro computer will display on
the CRT. (Ex: 050-0.11)
4. When CPU version is 050-0.11: Check the display
on the lower left is "01" and if it is not "01," set it at
"01" according to "3-1 7F, FRENCH, ACCESS
CODE, STEREO, VIDEO TONE, FM-MODE, V-
OUT."
1. DC 105V Adjustment (DCT1303R)
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Test Point
TP601
TP300
(GND)
Tape
Note: TP601, TP300 (GND,) VR661 --- Main CBA
1. Connect DC Volt Meter to TP601 and TP300
(GND.)
2. Adjust VR661 so that the voltage of TP601 becomes
+105±0.5V DC.
1. DC 114V Adjustment (DCT1903R)
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Fig. 1-1
Test Point
TP601
TP300 (GND)
Fig. 1-2
Note:TP601, TP300 (GND), VR661 --- Main CBA
1. Connect DC Volt Meter to TP601 and TP300(GND).
2. Adjust VR661 so that the voltage of TP601 becomes
+114±0.5V DC.
5-1
Adj. Point
VR661
M. EQ.
--- DC Voltmeter
Adj. Point
VR661
Tape M. EQ.
--- DC Voltmeter
Mode Input
--- ---
Spec.
+105±0.5V DC.
Mode Input
--- ---
Spec.
+114±0.5V DC.
L6315EA