Toshiba D-VR3SU Service Manual page 143

(3) Pin Port Description (IC301 ; LA71207M)
PIN NO. PIN NAME
9 REC OUT
75 GND
6 BIAS
11 BIAS CTL
6 PB EQ (+)
5 PB EQ (-)
7 PB EQ SW
3 PB EQ OUT
2 LINE PB IN
58 A.MUTE
76 INPUT 1
78 INPUT 2
1 Vref Filter
80 Input 3
77 Vcc
10 Line Out
79 ALC IN
DC VOLT. SIGNAL
2.3 -2dBm
0 -
REC:2.3 70KHz+1KHz MIX
PB:0 3Vp-p
REC:4.3V -
PB:5V
2.3 -
2.3 -
2.3 -
2.3 -32dBm
2.3 -32dBm
0 -
2.3 -27dBm
2.3 -27dBm
2.3 -
2.3 -27dBm
5.0 -
2.3 -4dBm
2.3 -13dBm
REMARK
REC AMP OUTPUT (GAIN ; 14dB)
It is grounded due to the switch inside of IC
during playback. During recording, it operates on
60KHz input HPF
The BIAS CTL voltage change depends on the
external TR.
PB EQ AMP INPUT (+)
PB EQ AMP INPUT (-)
PB EQ AMP SLP SW
PB EQ AMP OUTPUT
LINE AMP INPUT (PB)
Operates at HIGH (5V)
AUDIO INPUT : -27dBm
AUDIO INPUT : -27dBm
AUDIO INPUT : -27dBm
AUDIO OUTPUT : -4dBm
ALC level selector
Circuit Operating Descriptions
7-43