Denon AVR-X4300H

Protection Diagram
5CH AMP PCB
SPEAKER PCB FRONT CNT PCB
DIGITAL PCB
uCOM
PROTECTION LOGIC
DC ⇒ L_activeshutdown
ASO ⇒ L_activeshutdown
CURRENT (After 90sec )
Over 0.8V & Low B & THERMAL E = Low ⇒ shutdown
Over 1.3V ⇒ shutdown
THER PROTE ⇒ L_activeshutdown
F ⇒ FAN operation
THER PROTA ⇒ Chenge Power AMP Power Supply Voltege
BN704 CN704
BN25A 9pin
DC_DET2
DC_DET1
ASO_DET
THERMAL_DETA
THERMAL_DETB
THERMAL_DETE
THERMAL_DETF
DC_DET2
DC_DET1
ASO_DET
THERMAL_DETA
THERMAL_DETB
THERMAL_DETE
THERMAL_DETF
CURRENT DET
CURRENT DET
CN25A 9pin
CURRENT DET
BN25D 15pinCN25D 15pin
CURRENT DET
FL
ASO
DC
TR_THERMAL
FR
ASO
DC
TR_THERMAL
C
ASO
DC
TR_THERMAL
SL
ASO
DC
TR_THERMAL
SR
ASO
DC
TR_THERMAL
HEATSINK_THERMAL
HEATSINK_THERMAL
CPU LEVEL CHG PART
DC/ASO PROT 125pin/AN105
THER_PROT_E 161pin/P91
THER_PROT_F 163pin/P90
THER_PROT_A 159pin/P93
CURRENT DET 166pin/AN006
CURRENT DETECT PART
DC_DET3
ASO_DET
THERMAL_DETA
THERMAL_DETB
THERMAL_DETE
THERMAL_DETF
CN781
AS2L
ASO
DC
TR_THERMAL
AS2R
ASO
DC
TR_THERMAL
AS1L
ASO
DC
TR_THERMAL
AS1R
ASO
DC
TR_THERMAL
HEATSINK_THERMAL
HEATSINK_THERMAL
BN781
DC_DET3
ASO_DET
THERMAL_DETA
THERMAL_DETB
THERMAL_DETE
THERMAL_DETF
4CH PCB
141
Caution in
servicing
Electrical Mechanical Repair Information Updating