Electrical Adjustment Instructions - Sharp LC-20AV7U Service Manual

ELECTRICAL ADJUSTMENT INSTRUCTIONS

NOTE: CBA AND PWB MEANS PRINTED WIRING
BOARD.
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
4. Color Analyzer
How to enter the service mode:
Press [MENU] and [POWER] buttons on the TV unit
simultaneously in the standby mode.
1. Initial Setting
General: Enter Service mode.
Set initial data as shown on table 1.
Press the number after [MENU] on the table to access
next item. Press [CH. o / p] to change data value.
Table 1: Initial Data
Item
remote control)
RF-BRT
RF-CNT
RF-CLR-R
[MENU] → [1]
RF-CLR-B
RF-TNT
RF-SHR
V-BRT
V-CNT
V-CLR-R
[MENU] → [2]
V-CLR-B
V-TNT
V-SHR
Button
Data
(on the
Value
122
200
65
75
129
112
122
174
81
101
135
112
Item
S-BRT
S-CNT
S-CLR-R
S-CLR-B
S-TNT
S-SHR
D1-BRT
D1-CNT
D1-CLR-R
D1-CLR-B
D1-TNT
D1-SHR
D2-BRT
D2-CNT
D2-CLR-R
D2-CLR-B
D2-TNT
D2-SHR
D3-BRT
D3-CNT
D3-CLR-R
D3-CLR-B
D3-TNT
D3-SHR
DT-BRT
DT-CNT
DT-CLR-R
DT-CLR-B
DT-TNT
DT-SHR
COR(C/D1)
C-COR(C/D2)
COB(C/D1)
C-COB(C/D2)
5-1
Button
Data
(on the
Value
remote control)
122
179
80
[MENU] → [3]
110
139
112
120
169
99
[MENU] → [4]
124
129
112
132
164
99
[MENU] → [5]
124
122
112
127
160
110
[MENU] → [6]
120
140
112
127
184
95
[MENU] → [7]
113
129
112
128
[VOL -] → [1]
128
128
[VOL -] → [3]
128
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