
EMX512SC/EMX312SC
68
3-2
Repair Flowchart
Check the primary side circuit.
Note: Check and repair must be done carefully, otherwise the electrical shock may be caused.
Discharge (
*
1)
1
Check R418 and R424 resistor value.
NO
YES
2
Check Q406 and Q407 C-E resistor value.
NO
YES
3
Check R419 and R421 resistor value.
NO
SHORT
YES
OPEN
4
Check R440 resistor value.
NO
YES
5
Check R429, R430, R453 and R454
(Secondary)
resistor value.
NO
YES
*
1)
To prevent the electrical shock, be sure to discharge electricity from the capacitor.
Discharge is not necessary if you have left the unit for 10 minutes or more after turning the power off.
R419, R421 = 33
Ω
?
R429, R430, R453, R454 = 1
Ω
?
Replace R429, R430, R453 and R454.
Replace R440.
Replace Q414.
Replace R418 and R424.
Replace R419 and R421.
Replace D404 and D405.
Replace Q406 or Q407.
Replace IC402.
R419, R421
OPEN or SHORT?
START
Between ± terminals of C409 and C410
Between CN406 and CN408
Between CN405 and CN409 (EMX512SC)
A
R440 = 220
Ω
?
Q406, Q407 C-E
Resistor value
0 to several
Ω
?
R418, R424 = 6.8
Ω
?
Turn the power off.
(Disconnect AC plug from the wall outlet.)
Содержание EMX312SC
Страница 13: ...EMX512SC EMX312SC 13 DIMENSIONS 寸法図 71 66 1 54 108 284 2 286 264 71 66 1 298 307 8 440 2 5 442 5 Unit mm 単位 mm ...
Страница 29: ...EMX512SC EMX312SC 29 DSP Circuit Board 2NA WD80120 to MIX CN301 N C Component side 部品側 Pattern side パターン側 2 ...
Страница 33: ...EMX512SC EMX312SC 33 JACK Circuit Board 2NA WD94340 C C Pattern side パターン側 2 ...
Страница 34: ...EMX512SC EMX312SC 34 2NA WD94340 C C D D Pattern side パターン側 2 ...
Страница 35: ...EMX512SC EMX312SC 35 2NA WD94340 D D Pattern side パターン側 2 ...
Страница 43: ...EMX512SC EMX312SC 43 2NA WE83470 AC IN to PS CN402 to PS CN401 I I Component side 部品側 2 ...
Страница 46: ...EMX512SC EMX312SC 46 PA Circuit Board 2NA WE74050 K K Pattern side パターン側 1 ...
Страница 47: ...EMX512SC EMX312SC 47 2NA WE74050 K K Pattern side パターン側 1 ...
Страница 78: ...EMX512SC EMX312SC 78 3 2 修理フ ローチャー ト 1 次側回路を確認し ます 注意 感電するおそれがあ り ますので 注意し て作業し て く だ さい ...
Страница 80: ...EMX512SC EMX312SC 80 YES OPEN ...
Страница 82: ...EMX512SC EMX312SC 82 15Vp p 280Vp p ...
Страница 84: ...EMX512SC EMX312SC 84 ...