Amp Diag Mode After Abnormal Conditions; Protect Mode - Pioneer VSX-1131 Service Manual

1

Protect Mode

The unit goes into standby automatically when detect the abnormal condition of thermal detection, dc voltage detection or current detection. (e.g. VSX-831 block diagram below)
D
C
BAPS-2016
SUB Power Supply
B
TRANS. for STANDBY
Relay
FUSE
AC IN
F9002
RL9001
A
1
2 3
BAPRC-2034
PON_MAIN
BAAF-1979
POWER
TRANS.
T901
SEC-1
(H)
(HIGH)
FUSE
SEC-1
F6901 (L)
(LOW)
F6902
2 3
4

Amp Diag Mode after Abnormal Conditions

MPU
Q7009
PON_MAIN
SEC1H
Power amp.
BACLA-2020
VOLTAGE
DRIVE
RELAY
Power
RL6911
Supply
(H)
RL6912
or
(L)
Power
Supply
4
5
THERMAL
SPRLF
VOLH
VPROTECT
IPROTECT
P8002
DC
CURRENT
(Front L)
DETECT DETECT
Q6001
VPRO: DC voltage detection
IPRO: Current detection
Q6021
5
6
D
BAETC-1980
THERMAL
DETECT
Q6800
C
VOLTAGE
DETECT
RELAY
B
RL6501
(FL/FR)
BATRM-2023
A
COMMON
6