Circuit Diagram - Hitachi RAM-55QH5 Service Manual

CIRCUIT DIAGRAM

Remote Control
1 SEG5
2 SEG0
3
SEG1
4 SEG2
5 SEG3
6
SEG4
7 SEG5
8
SEG6
9 SEG7
10 COM3
11
COM2 LCD 1
12 COM1
13 COM0
14 SEG14
15 SEG13
16
SEG12
17
SEG11
18 SEG13
19
SEG9
20 SEG8
K6
K 1
D3
RB425D(1/2)
K2K3
K7 K8
K4
K8 K10
C8
50v/1u
K5
K11K12
SEG20 40
SEG19 39
SEG18 38
SEG17 37
SEG16 36
SEG21 35
SEG24 34
SEG25 33
SEG26 32
SEG27 31
SEG28 30
NC 29
NC 28
27
NC
NC 26
25
NC
24
NC
NC 23
NC 22
NC
21 65 SEG20
66 SEG21
67
SEG22
68 SEG23
69 SEG24
70
SEG25
71 SEG26
IC 1
72
SEG27
K13 K14
D0
73 SEG28
M3455OM6A-504FP
74 SEG29
75
SEG30
76 SEG31
K15 K16
D1
77 SEG32
78 SEG33
79 SEG34
80 SEG35
K17
D2
K18 D3
R1
100k
Key matrix table
Output
D0 D1
Input
Door open Start/Stop Operation selection
P10
Door shut Start/Stop Super silent cooling
Door open On timer Hour up
P11
Door shut – Room temperature up
Door open Off timer –
P12
Door shut Sleep –
40
P30
P31 39
38
NCVL C1
VL C2 37
VL C3 36
XC IN 35
XC OUT 34
VDD 33
VSS 32
X OUT 31
X IN 30
RESET 29
CARR 28
P23 27
26
P22
P21 25
D1 D2
EL-1L7
D1 D2
R6 R7 R8 R9
R2 R3 R10
100k 12M
100k
R6 R9
24(1/8W)
SW1
SW-187-2P
R5 Q1
330 2SC3443
R4 or 2SC2982
P
100k
D2 D3
Fan speed selection Automatic swing
– –
Hour down Day present time
•
Room temperature down Super cooling
Reservation Cancel
– –
D3
RB425D
(1/2)
C9
R15
R14
105
220k 100k
R11
150k
X2
R13
32.768
220K
X1
kHz
910kHz
K19
C6
C7
R16
104
104
100k
C1
C5 R12
C4
334 C2 C3
18p 22p
220k
220p 220p
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