NEC PF-68T31 Service Manual page 10

N801 TDA8354Q
Symbol PIN
Vo(guard) 1
Vi(M) 2
Vi(con) 3
Vp(B) 4
Vo(B) 5
GNDB 6
Vflb 7
N503 TDA9860 Universal Sound processor
Symbol Pin
AV1L 1
P1 2
MAINL 3
CSMO 4
MAINR 5
VP 6
OUT R 7
GND 8
LINOR 9
LINIR 10
CBR1 11
CBR2 12
Headphone R 13
CTR 14
MAINOR 15
SCL 16
Function : vertical output
Function description
Guard output voltage
Input measuring resistor
Input conversion resistor
Supply voltage B
Output voltage B
Ground B
Flyback supply voltage
Function
AV1 Audio Left input
Not used
Main Audio Left
input
Smoothing Capacitor CPS1
Main Audio Right
input
Power Supply
Right Output
Ground
Line Output Right
Line Input Right
Bass Cap. Right 1
Bass Cap. Right 2
Headphone-R output
Treble Cap. Right
Main Audio out Right
2
I C Bus clock
.
Symbol PIN Function description
GNDA 8 Ground A
Vo(A) 9 Output voltage A
Vp(A) 10 Supply voltage A
Ii(neg) 11 Input
includes Ii(sb) signal bias
Ii(pos) 12
Input power stage (positive;
includes Ii(sb) signal bias
Ii(comp) 13 Input
compensation current
Symbol Pi
n
AV1R 32 AV1 Audio input Right
P2 31 Not used
AV2R 30 AV2 Audio input Right
29 Pseudo stereo Cap. 1
AV2L 28 AV2 Audio input Left
CPS2 27 Pseudo stereo Cap. 2
OUT L 26 Left Output
MAD 25 Not used (GND)
LINOL 24 Line Output Left
LINIL 23 Line Input Left
CBL1 22 Bass Cap. Left 1
CBL2 21 Bass Cap. Left 2
Headphone L 20 Headphone-L output
CTL 19 Treble Cap. Left
MAINOL 18 Main Audio out Left
SDA 17 I
10
power stage(negative);
for damping resistor
Function
2
C Bus data