Aiwa XP-MP3, Руководство по обслуживанию

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IC, BH6508FS
IC, BA6655AFV
IC, MB3800PFV
H BRIDGE1
H BRIDGE4
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
PRE
DRIVER1
PRE
DRIVER4
H BRIDGE3
PRE
DRIVER3
H BRIDGE2
PRE
DRIVER2
LOGIC4 LOGIC4
LOGIC1 LOGIC2
NF
AMP
NF
AMP
NF
AMP
NF
AMP
F
F F
R
R R
R F
SWA
OSC
MUTE4
VREF
20k
20k
20k
20k
20k
20k
1k
1k
1k
20k
20k
3.75k
Thermal
shut down
VCC
CLK IN-SP CN-SP O-SPF O-SPR O-SLR O-SLF CN-SL IN-SL VG VCC
POW
GND
POW
VCC
POW
GND
POW
VCC
POW
GND
POW
GND
SP
CON
CT IN-FO CN-FO O-FOF O-FOR O-TOR O-TOF CN-TO IN-TO VREF POW
GND
POW
VCC
POW
GND
POW
VCC
Power
Switch1
Power
Switch2
Power Off
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
Vref2
Vref2
Vref1
Vref1
Vref1
Starta
Starta
Normal
EO
VSYS VSEN1 SW GND PVCC OSC ROUT PSW1 PSW2 BATT
NF RESET WP2 WP1 OFF VSEN2 VREG PDR DCIN
Vref2
REG.
Vref1
Switching
Triangular
OSC
3 7
5
1
8
6 2 4
DTC 0.6V
1.25v
PWM
Comp.
500
36k
0.6V
0.1V
0.1V
0.5V
0.3V
30k
Error Amp.
Soft Start
S.C.P
Output Drive
Controller
Ref. Volage
Saw Tooth
OSC
VCC OSC
GND SCP BR/CT
IN
FB
OUT
IC BLOCK DIAGRAM - 2/3