Techninal Information; Main Mi-Com (Cpu) Pin Function - JVC D Series Service Manual

2.4

TECHNINAL INFORMATION

2.4.1 MAIN MI-COM (CPU) PIN FUNCTION

Pin
Pin name I/O
No.
1 MTS_ADJ I Not used
2 AFT1 I AFT voltage for tuner (Tuning frequency control)
3 KEY I Key scan for front control [No signal : H]
4 uP_DVss - GND
5 Reset I CPU reset
6 8MHz_OUT O CPU system clock : 8MHz oscillation
7 8MHz_IN I CPU system clock : 8MHz oscillation
8 TEST - GND
9 uP_DVDD - 5V
10 AGC_MUTE O AGC muting for tuner (when channel select) [Muting : H]
11 uP_VVSS - GND
12 TV_HGND - GND
13 FBP_SCP I Flyback pulse (H. pulse)
14 HOUT O H. drive (oscillation)
15 H_Vcc - 9V (for H. oscillation start)
16 HAFC_1 - H. AFC filter
17 Vsaw - V. saw filter
18 VOUT O V. drive
19 EW_OUT O Parabola waveform (for sidepin correection)
20 X-RAY I X-ray detection (for protection) [Detection : H]
21 Ys I Not used
22 Cb_IN I Cb (external) signal
23 Y_IN I Y (external) signal
24 Cr_IN I Cr (external) signal
25 TV_DVcc - 3.3V
26 V3IN/CIN I Chroma signal (for YC separation output)
27 EHT_IN I Not used
28 V2_IN/Y_IN I Y signal (for YC separation output)
Pin
Function
No.
29 YC_GND
30 V1_IN
31 ABCL
32 MONITOR_OUT O Not used
33 BLACK_DET
34 SVM_OUT
35 APL_FIL
36 APC_FIL
37 fsc_OUT
38 YC_Vcc
39 R_OUT
40 G_OUT
41 B_OUT
42 RGB_Vcc
43 IK_IN
44 TV_DGND
45 uP_AGND
46 uP_AVdd
47 MAIN_POWER O Power on/off switching control [Powen on : L]
48 HAZARD
49 SDAO
50 SCLO
51 SDA1
52 A_MUTING
53 SCL1
54 LED
55 REMOCON
56 ASP_ABL
Pin name I/O
- GND
I Not used
I Current for automatic beam (brightness)/contrast limit
- Black level detection filter
O Y signal for velocity scan modulation
- Average picture level filter
- Automatic phase control filter
O Color sub carrier (3.58MHz) for 3-line digital comb filter [IC5201]
- 5V (for video process circuit)
O R signal
O G signal
O B signal
- 9V (for RGB process circuit)
I Not used
- GND
- GND
- 5V
I Not used
I/O Data for Inter IC control bus (for various devices)
O Clock for Inter IC control bus (for various devices)
I/O Data for Inter IC control bus (for main memory)
O Audio muting [Muting : H]
O Clock for Inter IC control bus (for main memory)
O POWER / ON TIMER LED lndication [lighting : L]
I Remote control sensor input [No input : H]
I Not used
Function
(No.YA073)1-5