Automatically Shutdown During Operation - Technics SU-G700E Service Manual

7.3.

Automatically shutdown during operation

Automatically shutdown during operation
Connector between
SMPS PCB and AMP PCB.
Recovered by disconnection and connection?
Damaged (no connection)?
Replace AMP PCB.
Confirmation of Thermistor (TH1501) on SMPS PCB.
connector between P1501
Is the correct value of resistor between
Pin 2 and 7 of P1501?
Correct value: 100 to 120 Kohm
Speaker unit from SU-G700.
Is the Symptom still appear.
AMP PCB to new one.
Is the Symptom still appear.
Replace AMP PCB.
y
Confirm
YES
Disconnect
to AMP PCB.
YES
Disconnect
NO
YES
Replace
NO
YES
R7224
25
R7043
24
23
22
21
20
19
P8_2/INT0 18
P8_3/INT1 17
[25]P7_3/XCTS2/XRTS2
P8_4/XINT2/ZP 16
[24]P7_4
R7009
[23]P7_5 P8_5/XNMI/XSD 15
[22]P7_6/TXD5/SD5
VCC1 14
[21]P7_7/CLK5
XIN 13
[20]P8_0/RXD5/SCL5
[19]P8_1/XCTS5/XRTS5 VSS 12
X O U T 11
Main Micon
XRESET 10
P8_6/XCOUT 9
IC7001
8 P 7 _ X / C N I 8
C N V S S 7
BYTE 6
P9_0/CLK3 5
P9_1/SIN3 4
P9_2/SOUT3 3
P9_3/DA0 2
P9_4/DA1 1
g
FFC between
NO
AMP PCB and Main PCB.
Recovered by disconnection and connection?
Damaged (no connection)?
Replace FFC.
Open or Short
Replace SMPS PCB.
NO
Replace speaker cable or confirm Speaker unit.
+3.3 V
can be measured at following
points?
100
RX7001
1k
D1H81014A042
CL7039
CL7050
CL7049
CL7048
RX7006
D1H81014A042
OLED_NRST
100k DEBBUG_CNVSS
C7001
F1H1H104B047
R7003
1M
C7008
R7002 C7004
F1H1C474A178
100K F1H1H3300005
R7001
100K
$ R7010 R7004 150K
R7024 100
X7002
H0J327200172
R7023 10K
R7236 100
100 R7022
R7020 33
J0JBC0000010
20
Confirm
YES
NO
Replace Main PCB.
PDET_A
DAMP_SD
DAMP_DC__DET
DAMP_OVR_TMP
PDET_M
SOC_SPI_DI
SOC_SPI_CLK
SOC_SPI_DO
PW_SYNC
PDET_A
DAMP_SD
DAMP_DC_DET
1
DAMP_OVR_TMP
PDET_M
REM_IN
NO
To SoC
To Audio Selector
To Audio Selector