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Chassis Service Adjustment Procedures
All service adjustments are factory preset and should not require adjustment unless controls and/or associated
components are replaced.
Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use IC801's heat sink when the HOT
ground symbol ( ) is used. Otherwise, use COLD ground (
Figure 10. A-Board Main
Components and Test
Points
IC552
IC551
T
U
N
E
R
FA1
CLK
DATA
FA2
COMPONENTS WITHIN DOT LINES ARE LOCATED AT THE OPOSITE SIDE OF BOARD.
130.0V B+ Voltage Confirmation
1. Set the Bright and the Picture to Minimum by using
the Picture Menu.
2. Connect the DVM between C825(+ side) and cold
ground (
).
3. Confirm that B+ voltage is 130.0V ± 2.5V. This
voltage supplies B+ to the Horizontal Output &
Flyback circuits.
Source Voltage Chart
120V AC line input. Set the Bright and the Picture to
Minimum by using the Picture Menu. Use cold ground
(
) for the (-) lead of the DVM.
LOCATION
TPD8
TPD9
IC552 Pin3
IC551 Pin3
D554 Cathode
IC 002
A11
IC001
IC050
TPE10
TPE11
IC2302
COLD (
IC2301
VOLTAGE
26.0V ± 2V
13.0V ± 2V
5.0V ± 0.25V
9.0V ± 0.25V
200V ± 15V
- 15 -
) — Tuner shield, IC451's heat sink or FA2.
IC 003
C825
TPD14
TPD17
TPD15
TPD16
IC 801
CRT
HOT (
)
GND
)
F801
TPD9
Adjust Picture Menu for normalized video adjustments.
High Voltage Check
1. Select an active TV channel and confirm that
horizontal is in sync.
2. Adjust Brightness and Picture using Picture Icon
menu so video just disappears.
3. Confirm B+ 130V is within limit.
4. Using a high voltage meter confirm that the High
Voltage is:
26.60kV±1.25kV
(Models with Samsung CRT)
CT-2016SE, CT-2006SE,
27.70kV±1.25kV
(Models with AMEC CRT)
IC451
D561
TPD8
D554
FOCUS
SCREEN
CT-20R6E/CE,
CT-20G6E/DE
CT-20D11E/DE
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