Service manual

HT-DP2500
– 27 –
Figure 27 BLOCK DIAGRAM OF IC
IC1 RH-iX0001SJZZ: System Microcomputer (IX0001SJ)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
TUN_DI
TUN_DO
TUN_CK
TUN_CE
TUN_MUTE
TUN_SD
TUN_ST
VDD
OSC2
OSC1
VSS
XI
XO
MMOD
VREF
KEY1
KEY2
KEY3
AREA
SP_LEVEL
MODEL
POSISTOR
VREF+
ALC
RESET
FS_STB
FS_DATA
FS_CK
V_LATCH
V_CK
V_DATA
POWER
SYS_STOP
AC3_SO
REMOCON
JOG_UP
JOG_DOWN
F_MUTE
R_MUTE C_MUTE
SW_MUTE
FA_RLAY
POW_SW
R_RLAY C_RLAY
SW_RLAY
SPSWA SPSWB
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
S12
S11
S10
S9
S8
S7
S5
S5
S4
S3
S2
S1
G10
G9
G8
G7
G6
G5
G4
G3
G2
G1
LED1
FAN
PROTECT
100
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
VPP DEM1 DEM0 V_MUTE V_SW2 V_SW1 PRO_CK PRO_DI PRO_ENA SW_ON AC3_SCK D_SEL AC3_SI AC3_SS AC3_RES ADPD DAPD S16 S15 S14 S13
IC1
IX0001SJ
IC203 VHiLA1833//-1: FM/AM IF MPX. (LA1833)
24
121110
23
22
21
20
19
18
17
16
15 14
13
98
76
54
3
2
1
ALC
ACC
P-DET
STEREO
SW
PILOT
DET
AM
OSC
AM
IF
AM/FM
IF
BUFF
AM
DET
AM
MIX
AM
RF.AMP
BUFF
LEVEL
DET
FM
IF
FM
DET
TUNING
DRIVE
REC
GND
Vcc
S-CURVE
COMP
PILOT
CANCEL
FM IF IN
AM IF IN
AM MIX
OUT
REG GND Tu-LED
ST-LED
FM-DET Vcc AM/FM
IF-BUFF
L-CH
OUT
R-CH
OUT
PLL
IN
AM RF
INAFCOSC
OSC
BUFF/
FM SD
ADJ