Sylvania 6842PF M, Service Manual

Page: 3 / 33

1-1-1 L0655EA
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 Win-
dow, Red Color, Gray Scale)
2. Plastic Tip Driver
3. Remote control unit: Part No. N0121UD or N0134UD
4. Color Analyzer
How to make service remote control
unit:
1. Prepare normal remote control unit. (Part No.
N0121UD or N0134UD) Remove 3 Screws from
the back lid. (Fig. 1-1)
2. Add J1 (Jumper Wire) to the remote control CBA.
(Fig. 1-2)
How to set up the service mode:
Service mode:
1. To turn the power on, press "POWER" button on the
normal remote control unit or the unit.
2. Use the service remote control unit.
3. Press "SLEEP" button on the service remote con-
trol unit. Fig. 2 appears on the screen.
4. Confirm the following
a. Version of main micro
computer --- K798-016
b. Memory size --- 4
c. FLASH DATA Chek Sum (press "0" button on
the service remote control unit) --- C97A
Initial setting:
1. To turn the power on, press "POWER" button on the
normal remote control unit or the unit.
2. Enter the service mode.
3. To reset to factory setting, press "DISPLAY" but-
ton on the normal remote control unit.
- "INITIALIZE" (red) appears on the screen as
shown in Fig. 3.
- After few seconds (completion initialization), col-
or of "INITIALIZE" will change green.
SCREW
REMOTE CONTROL UNIT Fig. 1-1
J 1
Fig. 1-2
REMOTE CONTROL CBA
MAIN UCOM Ver.
MEMORY SIZE
CHKSUM : K798-016
: 4
: Push 0 key
Fig. 2
MAIN UCOM Ver.
MEMORY SIZE
CHKSUM : K798-016
: 4
: Push 0 key INITIALIZE
Fig. 3