Marantz SR7009/U1B Service Manual page 74

3.5. PROTECTION DIAGRAM
TR_THERMAL
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
SBL
ASO
DC
TR_THERMAL
SBR
ASO
DC
HEATSINK_THERMAL
HEATSINK_THERMAL
2CH PCB
TR_THERMAL
FWL
ASO
DC
TR_THERMAL
FWR
ASO
DC
HEATSINK_THERMAL
HEATSINK_THERMAL
PAMP PCB DIGITAL PCB
BN710 CN704
DC_DET2 DC_DET2
DC_DET1 DC_DET1
ASO_DET ASO_DET
THERMAL_DETA THERMAL_DETA
THERMAL_DETB THERMAL_DETB
THERMAL_DETE THERMAL_DETE (7CH)
THERMAL_DETF THERMAL_DETF (7CH)
CN781
BN781
DC_DET3
DC_DET3
ASO_DET
ASO_DET
THERMAL_DETA
THERMAL_DETA
THERMAL_DETB
THERMAL_DETB
THERMAL_DETE (2CH)
THERMAL_DETE
THERMAL_DETF (2CH)
THERMAL_DETF
CURRENT DETECT PART
74
uCOM
PROTECTION LOGIC
DC ⇒ L_activeshutdown
ASO ⇒ L_activeshutdown
THER PROTA ⇒ L_activeshutdown
THER PROTB ⇒ L_activeshutdown
THER PROTE ⇒ L_activeshutdown
THER PROTF ⇒ L_activeshutdown
CURRENT (After 90sec )
Over 0.8V & Low B & THERMAL E = Low ⇒ shutdown
Over 1.3V ⇒ shutdown
CPU LEVEL CHG PART
SPEAKER PCB FRONT CNT PCB
CN25A 9pin
CN25D 15pin BN25D 15pin
CURRENT DET
CURRENT DET CURRENT DET
DC 113pin/PD4
ASO 112pin/PD5
THER_PROT_E 66pin/P77
THER_PROT_F 81pin/PB5
THER_PROT_A 125pin/P95
THER_PROT_B 126pin/P94
CURRENT DET 141pin/IRQ8-B
BN25A 9pin
CURRENT DET