JVC TV-13142 Service Manual page 27

SYSCON PCB OEC7059A (IC1001)
PIN NO. PIN NAME
1 MSSEN A
2 MSSEN B
3 EOT
4 BOT
5 HI-FI ENV
6 VIDEO ENV
7 AFT(MONI.)
8 AFT(REC)
9 KEY 1
10 KEY 2
11 CAPSTAN FWD
12 CAPSTAN LIMIT
13 DUMMY V.SYNC
14 REMOCON IN
15 COLOR ROTARY
16 HEAD AMP.SW
17 ENV COMP IN
18 VIDEO HEAD SW
19 HI-FI HEAD SW
20 LDM RVS
21 LDM FWD
22 DEGAUSS-H
23 MSSENS CTL
24 SP-H
25 SPOT OFF
26 EXT MUTE
27 VCR POWER
28 TV POWER
29 T-REC LED
30 REC LED
31 ON TIMER LED
32 OTPB LED
33 PLAY LED
34 RESET
35 XCIN
36 XCOUT
37 VCC
38 XIN
39 XOUT
40 VSS
41 X-RAY TEST
42 CS REC LED
43 CLKSEL
44 OSC IN
45 OSC OUT
46 NUB
47 AV 1
48 AV 2
49 OSD VSS
50 TAB SW
51 SERVICE
52 SD IN
IC DESCRIPTION
I / O
I Input terminal of mecha state sensor.
I
I Tape end sensor input signal.
I Tape start sensor input signal.
I Input terminal of Hi-Fi RF envelope.
I Input terminal of video RF envelope.
I Input terminal of AFT.
I Not used.
I Main unit key input.
I
O Capstan forward and backward command. (forward "L" output)
O Switch the maximum output current of the Capstan Motor.
O Virtual V Pulse output.
I Receive the remote control signal.
O Color Rotary Control output.
O Switching output of Head Amp SW on 4 heads.
I Comparison results input of Playback Envelope level ON SP/LP heads (4heads)
O Output terminal of Head SW to Y/C/A and Head Amp.
O Output terminal of audio Head SW to Y/C/A and Head Amp.
O Output signal to control the rotation direction of the loading motor.
O
O Degauss control output
O MSSEN sensor LED.
O Output HIGH at tape speed SP.
O Output HIGH at turning off a television.(for 500 msec.)
O Mute signal of external video mute.
O VCR power output.
O TV power output.
O T-REC indication LED output.
O REC indication LED output.
O ON-TIMER indication LED output.
O OTPB indication LED output.
O PLAY indication LED output.
I RESET will be done when the voltage goes to HIGH after the reset signal.
I Subclock pulse (32kHz)
O
- 5V
I Connect the main crystal (10MHz)
O
- Ground.
O X-RAY test output
O Not used.
I 5V
I Terminal to connect the OSD circuit.
O Terminal to connect the OSD circuit.
- Ground.
O Not used.
O Not used.
- Ground.
I Input terminal for judge the tape if it has TAB or not.
I Input terminal for Service Mode.
I Not used.
DESCRIPTION
TV-13142
TV-13142W
27