Circuit Explanation - Haier DX-RCRT20-09 Service Manual

6. Circuit Explanation

1、Microprocessor and Small signal processing: super monolithic integrated circuits ：
R2J10165GF
R2J10165GF is an integrated circuit decoder, containing intermediate image
amplifying, horizontal and vertical scan, small signal processing, color decoding,
2
I C bus control.
Information introducing functions and testing data for maintenance is listed in
Table 1.
Table 1
SYMBOL
STANDBY
MUTE
AV1/AV2(SW1)
5V-C(DVD-C)
GND
1.2V-C
DTV RESET
SREQ
AFT(AD0)
DEF VCC(8.0V)
V RAMP(+)
VRAMP CAP
AFC 1 FIL
DEF VCC(5.0V)
H OUT
FBP IN
DEF GND
VRAMP AGC
Cb IN YcbCr
Cr IN YcbCr
C-APC
XTAL
CHROMA GND
Y SW OUT
TEST/EW OUT
MCU 5.7 VDD OUT
PAL ID FIL
8.7V REG OUT
EXT AU(L)IN/EXT AU2 IN
EXT2 IN/C IN YC
CHROMA VCC(5.0)
EXT 1 IN/YIN YC/YIN Y
CbCr
PIN DESCRIPTION
1 STANDBY
2 MUTE
3 AV1/AV2 SWITCH
4 5V CONTROL
5 GND
6 DTV 1.2V CONTROL
7 DTV RESET
8 SREQ
SIF auto phase control
9
10 8V POWER
11 V RAMP(+)
12 VRAMP CAP
SIF auto phase control
13
filter
14 5V POWER
15 Horizontal SIGNAL OUT
16 FBP IN
17 GND
18 VRAMP AGC
19 Cb IN YcbCr
20 Cr IN YcbCr
21 C-APC
22 XTAL
23 CHROMA GND
24 Y SW OUT
25 TEST/EW OUT
26 MCU 5.7 VDD OUT
27 PAL ID FIL
28 8.7V POWER OUT
29 EXT AU(L)IN/EXT AU2 IN
30 EXT2 IN/C IN YC
31 CHROMA VCC(5.0)
32 EXT 1 IN/YIN YC/YIN Y
CbCr
Working
Voltage (V)
4.88（ON/OFF）
1.90
4.86
0.03
0
4.69/0.03（ATV/DTV） 25.6K
0.03
0.14
4.87
8.06
2.95
2.35
3.12
4.97
0.83
1.10
0
2.15
1.18
1.17
2.96
3.22
0
3.35
2.74
5.54
2.26
8.71
3.28
1.96
0.17
0.23
16
Ground
Resistance (Ω)
21.6K
25.6K
25.6K
25.6K
0
2.8K
2.57K
154.4K
0.68K
11K
28M
69.5K
1.46K
1.55K
27K
0
27M
27M
27M
27M
28M
0
3.38K
19.3K
46K
27M
210K
27M
28M
1.46K
27M