2-5
Hearing the Pop Noise?
OK
YES
IC401(87, 96, 98), IC601(15), IC804(22),
Q601, Q602, Q603, Q604, Q607
NO
Checked the
Mute contorl?
YES
2A
No Sound External AMP?
OK
YES
IC601(18, 19, 20, 21, 22, 23)
NO
Checked the
Line Out signal?
YES
Q601, Q602, Q603, Q604, Q607
NO
Checked the Line Out
AMP Mute control?
YES
JK601
NO
Checked the Line Out
AMP signal in/out?
YES
2B
No output Beep sound?
OK
YES
YES
IC401(30), IC601(14)
NO
Checked the
Beep control?
2C
[OPTIONAL]
Summary of Contents for MAX220UB
Page 27: ...2 18 ...
Page 35: ...PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD 2 33 2 34 TOP VIEW BOTTOM VIEW ...
Page 36: ...2 FRONT P C BOARD 2 35 2 36 TOP VIEW BOTTOM VIEW ...
Page 37: ...2 37 2 38 ...
Page 39: ...3 3 3 4 ...