Electrical Adjustment Instructions - Symphonic SYLVANIA Emerson 6313CD Service Manual

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. NTSC Pattern Generator (Color Bar W/White Win-
dow, Red Color, Dot Pattern, Gray Scale, Mono-
scope, Multi-Burst)
2. AC Milli Voltmeter (RMS)
3. Alignment Tape (FL8A, FL8N), Blank Tape
4. DC Voltmeter
5. Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div,
F-Range: DC~AC-60MHz
6. Frequency Counter
7. Plastic Tip Driver
How to make service remote control
unit:
1. Prepare normal remote control unit. (Part No.
N0107UD) Remove 3 screws from the back lid.
(Fig. 1-1)
SCREW
Remote control unit (Bottom)
2. Remote control unit: Part No. N0107UD
Add J1 (Jumper Wire) to the remote control CBA.
(Fig. 1-2)
Remote control CBA
Remote control CBA
Remote control unit: Part No. N0150UD
Cut off pin 10 of the remote control microprocessor
and short circuit pins 10 and 17 of the microproces-
sor with a jumper wire
How to Set up the Service mode:
Service Mode:
1. Use the service remote control unit.
2. Turn the power on.
3. Press "WAKE-UP/SLEEP" button on the service
remote control unit.
1. DC 105V (+B) Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
unit does not operate correctly.
Test point
D613
Cathode
(+B)
C613(-)
(GND)
Tape
---
Note: D613 Cathode (+B), C613(-) (GND),
VR601 --- Main CBA
1. Connect the unit to AC Power Outlet.
2. Connect DC Volt Meter to D613 Cathode (+B) and
C613(-) (GND).
3. Adjust VR601 so that the voltage of D613 Cathode
(+B) becomes +105±0.5V DC.
2-1. H Adjustment
Purpose: To get correct horizontal position and size of
screen image.
Fig. 1-1
Symptom of Misadjustment: Horizontal position and
size of screen image may not be properly displayed.
Test point
R583
Tape
Fig. 1-2
Fig. 1-2
---
Note: R583 --- Main CBA
1. Connect Frequency Counter to R583.
2. Set the unit to the VIDEO mode and no input is
necessary. Enter the Service mode.
(See page 1-4-1.)
1-7-1
Adj. Point Mode
VR601
M. EQ.
DC Voltmeter
+105±0.5V DC
Plastic Tip Driver
Adj. Point Mode
CH o / p
Video
buttons
M. EQ.
Frequency Counter 15.734kHz±300Hz
Input
--- -----
Spec.
Input
---
Spec.
T5401EA