Sony TC-WR990 - Page 5

SECTION 3
EXPLANATION OF IC TERMINALS
1C801 M50941- 712P
Terminal explanation
VREF Standard voltage 5V
METER. L Meter L-CH input
METER. R Meter R-CH input
KEY. 1
KEY. 2
ON:: Available
OFF--Not Available | Put
REC A REC B HALF Voltage
5V
3.9V
2.8V
2V
iv
Switch status
A, SHUT S-side reel rotation detection at A-deck
B, SHUT S-side reel rotation detection at B-deck
VER. SELECT Reverse“1 way “L” : Reverse
MOT. H/L Tape speed selector “L” Normal,
A. RM + Reel moter (+) output at A-deck,
A. RM — Reel moter (—) output at A-deck,
B. RM + Reel moter (+) output at B-deck,
B. RM - Reel moter (—) output at Bdeck,
RELAY Recording/play selector at Bdeck, “L” : Recording
BIAS Bias ON/OFF at Bedeck, “H” : ON
A/B A-deck//B-deck play selector, at Bdeck, “H” : A-deck
REC /PB Recording play selector for Dolby IC, “H” : play
EQ. H/L NORMAL/HIGH selector for recording equalizer, “L” : NORMAL
REC. MUTE Recording MUTE ON/OFF “L” : ON
L. MUTE LINE MUTE ON/OFF “L” : ON
P, OUT Power holding output “L” : Power on holding
P. IN Power switch input “L” : OFF
SIRCS SIRCS signal input
GND
RESET signal input
Oscillation terminal
Oscillation terminal (4MHz)
Not used
XC — OUT Not used
VSS GND
Not used
TEST Test mode selector “L” : Test mode
B. STOPSW Mechanism stop swich input for Bdeck “H” : STOP