Read Sony CMT-DX400 / CMT-DX400A / HCD-DX400 Service Manual online
HCD-DX400/DX400A
22
MAIN BOARD IC8 TDA7492 (50W + 50W dual BTL Class-D audio amplifi er)
Pin No.
Pin Name
I/O
Description
1
SUB_GND
-
Connect to the frame
2, 3
OUTPUTB
-
Positive PWM for right channel
4, 5
PGNDB
-
Power stage round for right channel
6, 7
PVCCB
-
Power supply for right channel
8, 9
OUTNB
O
Negative PWM output for right channel
10, 11
OUTNA
O
Negative PWM output for right channel
12, 13
PVCCA
-
Power supply for left channel
14, 15
PGNDA
-
Power stage round for left channel
16, 17
OUTPA
O
Positive PWM output for left channel
18
PGND
-
Power stage Ground
19
VDDPW
O
3.3 V (nominal) regulator output referred to ground for power stage
20
STBY
I
Standby mode control
21
MUTE
I
Mute mode control
22
INPA
I
Positive differential input of left channel
23
INNA
I
Negative differential input of left channel
24
ROSC
O
Master oscillator frequency-setting pin
25
SYNCLCK
I/O
Clock in/out for external oscillator No used
26
VDDS
-
3.3 V (nominal) regulator output referred to gnd for signal blocks
27
SGND -
Signal
Ground
28
DIAG
O
Open-drain diagnostic output
29
SVR
-
Supply voltage rejection
30
GAIN0
I
Gain setting input 1
31
GAIN1
I
Gain setting input 2
32
INPB
I
Positive differential input of right channel
33
INNB
I
Negative differential input of right channel
34
VREF
-
Half VDDS (nominal) referred to ground
35
SVCC
-
Signal power supply
36
VSS
-
3.3 V (nominal) regulator output referred to power supply
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