Electrical Adjustment Instructions - Sylvania 6620LE 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 completed.
Also, do not attempt these adjustments unless the
proper equipment is available.
Test Equipment Required
1. DC Voltmeter
2. NTSC Pattern Generator (Color Bar W/White
Window, Red Color, Dot Pattern, Gray Scale,
Monoscope, Multi-Burst)
3. Remote control unit: Part No. N0105UD or N0127UD
4. Color Analyzer
How to make Service remote control unit:
1. Prepare normal remote control unit. (Part No.
N0105UD or N0127UD) Remove 3 Screws from the
back lid. (Fig. 1-1)
SCREWS
REMOTE CONTROL UNIT
2. Add J1 (Jumper Wire) to the remote control CBA.
(Fig. 1-2)
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 control
unit. Version of micro computer will be displayed on
the LCD or display. (Ex: 0004GP-0.47)
1. Initial Setting
General
Enter the Service mode.
Set the each initial data as shown on tabel 1 below.
Table 1: Initial Data
ITEM
BRT
CNT
CLR-R
CLR-B
TNT
V-TNT
SHR
S-BRT
S-CNT
S-CLR-R
S-CLR-B
S-TNT
S-SHR
C-BRT
Fig. 1-1
C-CNT
C-CLR-R
C-CLR-B
C-TNT
C-SHR
D2-BRT
D2-CNT
Fig. 1-2
D2-CLR-R
D2-CLR-B
D2-TNT
D2-SHR
D3-BRT
D3-CNT
D3-CLR-R
D3-CLR-B
D3-TNT
D3-SHR
5-1
BUTTON
DATA
(on the service
VALUE
remote control)
167
197
60
MENU → 1
60
60
64
35
167
197
64
MENU → 2
64
64
35
167
197
64
MENU → 3
64
64
35
167
197
64
MENU → 5
64
64
35
167
197
64
MENU → 6
64
64
35
L0311EA