Protection Circuit - Pioneer HTP-072 Service Manual

5

5.2 PROTECTION CIRCUIT

[1] Overload and DC Protection Circuit
OVERLOAD DECTION CIRCUIT
Q205
R224
Q207
Q206
SPK.DC
PROTECTION
CIRCUIT
POWER DC DETECTION CIRCUIT
R49 R51 R52
R50
R58 R59
R60
[2] TEMP Detection Circuit
5
6
D
AMP6 ASSY
R229
C215
D202
R227
R230FR
R230FL
R230C
R230SR
R230SL
R230SW
HTP-072 only
A MAIN ASSY
Q14
Q15
HEAT SINK
A
MAIN ASSY
R172
CP100
ZD101
D107
6
7
R2443
R2400
Q2017
R2415
Q2021
R2421
HTP-072
7
8
E
CPU ASSY
IC2023
(MAIN CPU)
85 PROTECT1
NORMAL:3.3V
ASO PROTECTION:0.83V
DC PROTECTION:1.45V
E
CPU ASSY
IC2023
(MAIN CPU)
70 PROTECT2
NORMAL:3.3V
THERMAL DETECT:0V
(VOLUME DOWN)
23
8
A
B
C
D
E
F