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Diagnosis Of Pd (power-down) - Pioneer krp-m01 Service Manual

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5.3 DIAGNOSIS OF PD (POWER-DOWN)

A
[1] BLOCK DIAGRAM OF THE POWER-DOWN SIGNAL
Note:
1
The figure
indicate the number of times the
Red LED flashes when power-down occurs
in the corresponding route.
B
MAIN BLOCK ASSY
C
D
IC7003
MAIN_ucom
(EMMA2)
E
F
56
1
2
V+5.1V_STB
V+17V
V+12V
V+6.5V
V+3.4V_STB
1
PD_TRG
INV.
RELAY
AC_DET
RST3
INV.
IC6811
IF_ucom
KRP-M01
2
3
POWER SUPPLY UNIT
<PKG 1>
M1
P2
STB5.1V
+17V
+12V
+6.5V
STB3.4V
PD_TRG
RELAY
AC_DET
<Protection function>
Overcurrent Protection (OCP)
V+3.4V_STB, V+5.1V_STB, VCC 3
outputs
Overvoltage Protection (OVP)
V+6.5V, V+12V, V+17V
V+3.4V_STB (latches for long time)
Under Voltage Protection (UVP)
V+6.5V, V+12V, V+17V
Thermal Shut Down (TSD)
V+6.5V output diode: D351 block
V+3.4V_STB (latches for long time)
3
4
4

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