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202P7 CRT
35
Repair Flow Chart (Continued)
18 H_UNLOCK
To H-deflection
7462 base
19 MUTE
To H-deflection
7466 base
20 OFF
To Control Board
22 Degauss
Check
active=hi
no active=low
24 Selftest
Check Pin56
1. No H/V Sync&IF cable Pin5 floating
-show msg.
2. H/V Sync exist & IF cable Pin5 to ground
-normal
3. H/V Sync non-exist & IF cable Pin5 to gnd
-power saving
4. After 1891&1894&1895 pressed on, then
power on(1102) with IF cable Pin5=L
-factory mode
5. After 1892&1893 pressed on, then power on
(1102) without IF cable Pin5=H
-burn in mode
25, 26 DDC bus
Check idle status
SDA=Pin25=hi
SCI=Pin26=hi
23 KEY_ADC
Check key Power, OK, LF,
Brightness and Contrast keys
Содержание 202P70/00
Страница 37: ...37 202P7 CRT Go to cover page Wiring Diagram ...
Страница 40: ...40 Main Schematic Diagram Go to cover page 202P7 CRT C1 224V C2 C3 224V C4 C5 C6 C7 C8 C9 C13 C12 C11 C10 101V ...
Страница 41: ...41 202P7 CRT Go to cover page Main Board C B A 1 ...
Страница 42: ...42 Main Board C B A 2 Go to cover page 202P7 CRT ...
Страница 44: ...44 Go to cover page Video Board C B A 1 202P7 CRT ...
Страница 45: ...45 202P7 CRT Go to cover page Video Board C B A 2 ...
Страница 47: ...47 202P7 CRT Go to cover page TERMINAL Board C B A 1 ...
Страница 48: ...48 TERMINAL Board C B A 2 Go to cover page 202P7 CRT ...
Страница 50: ...50 Driver Board C B A Go to cover page 202P7 CRT ...
Страница 51: ...51 202P7 CRT Go to cover page KEY CONTROL Schematic Diagram C B A ...
Страница 52: ...52 MHR Schematic Diagram C B A Go to cover page 202P7 CRT ...