Circuit Operating Descriptions
Samsung Electronics
14-45
(3) Pin Port Description (IC301 ; LA71207M)
PIN NO.
PIN NAME
DC VOLT.
SIGNAL
REMARK
9
REC OUT
2.3
-2dBm
REC AMP OUTPUT (GAIN ; 14dB)
75
GND
0
-
6
BIAS
REC:2.3
70KHz+1KHz MIX
It is grounded due to the switch inside of IC
PB:0
3Vp-p
during playback. During recording, it operates on
60KHz input HPF
11
BIAS CTL
REC:4.3V
-
The BIAS CTL voltage change depends on the
PB:5V
external TR.
6
PB EQ (+)
2.3
-
PB EQ AMP INPUT (+)
5
PB EQ (-)
2.3
-
PB EQ AMP INPUT (-)
7
PB EQ SW
2.3
-
PB EQ AMP SLP SW
3
PB EQ OUT
2.3
-32dBm
PB EQ AMP OUTPUT
2
LINE PB IN
2.3
-32dBm
LINE AMP
INPUT (PB)
58
A.MUTE
0
-
Operates at HIGH (5V)
76
INPUT 1
2.3
-27dBm
AUDIO INPUT : -27dBm
78
INPUT 2
2.3
-27dBm
AUDIO INPUT : -27dBm
1
Vref Filter
2.3
-
80
Input 3
2.3
-27dBm
AUDIO INPUT : -27dBm
77
Vcc
5.0
-
10
Line Out
2.3
-4dBm
AUDIO OUTPUT : -4dBm
79
ALC IN
2.3
-13dBm
ALC level selector
Summary of Contents for DVD-VR320/XEF
Page 32: ...5 22 Disassembly and Reassembly Samsung Electronics MEMO ...
Page 68: ...Troubleshooting 6 36 Samsung Electronics MEMO ...
Page 76: ...Exploded View and Parts List 7 8 Samsung Electronics MEMO ...
Page 216: ...Circuit Operating Descriptions Samsung Electronics 14 17 Fig 14 12 IC601 Block Diagram ...
Page 249: ...Circuit Operating Descriptions 14 50 Samsung Electronics MEMO ...
