Read Sharp R-895M (serv.man7) Service Manual online
R-895M - 22
46
P22
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). In 100% operation, the
signals hold “L” level during
microwave cooking and “H” level
while not cooking. In other
cooking modes (70%, 50%, 30%,
10%) the signal turns to “H” level
and “L” level in repetition
according to the power level.
To turn on and off the cook relay
(RY2). In 100% operation, the
signals hold “L” level during
microwave cooking and “H” level
while not cooking. In other
cooking modes (70%, 50%, 30%,
10%) the signal turns to “H” level
and “L” level in repetition
according to the power level.
47
P21
OUT
Grill (TOP) heating element driving signal.
To turn on and off the grill heating element relay
(RY3). “L” level during grill cooking, convection
cooking or dual cooking. “H” level otherwise. The
heater relay turns on and off within a 54 second time
base in accordance with the special progrom in LSI.
To turn on and off the grill heating element relay
(RY3). “L” level during grill cooking, convection
cooking or dual cooking. “H” level otherwise. The
heater relay turns on and off within a 54 second time
base in accordance with the special progrom in LSI.
48
P20
OUT
Oven lamp and turntable motor driving signal(Square Waveform : 50Hz).
To turn on and off shut-off relay (RY1).
The square waveform voltage is
delivered to the relay (RY1) driving
circuit.
To turn on and off shut-off relay (RY1).
The square waveform voltage is
delivered to the relay (RY1) driving
circuit.
49-50
P17-P16
OUT
Terminal not used.
51-80
SEG39-SEG10
OUT
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.)
LCD (Pin No.)
LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (90) ....................SEG39 (51)
SEG21 (69) ................. SEG19 (19)
SEG 1 (89) ....................SEG38 (50)
SEG22 (68) ................. SEG18 (18)
SEG 2 (88) ....................SEG37 (49)
SEG23 (67) ................. SEG17 (17)
SEG 3 (87) ....................SEG36 (48)
SEG24 (66) ................. SEG16 (16)
SEG 4 (86) ....................SEG35 (47)
SEG25 (65) ................. SEG15 (15)
SEG 5 (85) ....................SEG34 (46)
SEG26 (64) ................. SEG14 (14)
SEG 6 (84) ....................SEG33 (45)
SEG27 (63) ................. SEG13 (13)
SEG 7 (83) ....................SEG32 (44)
SEG28 (62) ................. SEG12 (12)
SEG 8 (82) ....................SEG31 (43)
SEG29 (61) ................. SEG11 (11)
SEG10 (80) ...................SEG30 (30)
SEG30 (60) ................. SEG10 (10)
SEG11 (79) ...................SEG29 (29)
SEG31 (59) ................... SEG 9 ( 9)
SEG12 (78) ...................SEG28 (28)
SEG32 (58) ................... SEG 8 ( 8)
SEG13 (77) ...................SEG27 (27)
SEG33 (57) ................... SEG 7 ( 7)
SEG14 (76) ...................SEG26 (26)
SEG34 (56) ................... SEG 6 ( 6)
SEG15 (75) ...................SEG25 (25)
SEG35 (55) ................... SEG 5 ( 5)
SEG16 (74) ...................SEG24 (24)
SEG36 (54) ................... SEG 4 ( 4)
SEG17 (73) ...................SEG23 (23)
SEG37 (53) ................... SEG 3 ( 3)
SEG18 (72) ...................SEG22 (22)
SEG38 (52) ................... SEG 2 ( 2)
SEG19 (71) ...................SEG21 (21)
SEG39 (51) ................... SEG 1 ( 1)
SEG20 (70) ...................SEG20 (20)
81
SEG9
OUT
Terminal not used.
82-90
SEG8-SEG0
OUT
Segment data signal.
Connected to LCD. Signal is similar to SEG39.
Connected to LCD. Signal is similar to SEG39.
91
VCC
IN
Connected to GND.
92
VREF
IN
Connected to GND.
93
AVSS
IN
Connected to VC.
94
COM3
OUT
Terminal not used.
95
COM2
OUT
Common data signal: COM3.
Connected to LCD (Pin No. 35).
Connected to LCD (Pin No. 35).
96
COM1
OUT
Common data signal: COM2.
Connected to LCD (Pin No. 34).
Connected to LCD (Pin No. 34).
97
COM0
OUT
Common data signal: COM1.
Connected to LCD (Pin No. 33).
Connected to LCD (Pin No. 33).
98-99
VL3-VL2
IN
Power source voltage input terminal.
Standard voltage for LCD.
Standard voltage for LCD.
100
C2
IN
Terminal not used.
Pin No.
Signal
I/O
Description
During cooking
L
H
20 msec.
ON
OFF
During
cooking
L
GND
H.
(Grill, Convection, Dual )
MICRO
ON
OFF
COOK
100%
54 sec.
0 sec.
70%
40 sec.
14 sec.
50%
29 sec.
25 sec.
30%
18 sec.
36 sec.
10%
9 sec.
45 sec.
MICRO
ON
OFF
COOK
100%
32 sec.
0 sec.
70%
24 sec.
8 sec.
50%
18 sec.
14 sec.
30%
12 sec.
20 sec.
10%
6 sec.
26 sec.
ON/OFF time ratio in Micro
cooking
(a. 32second time base)
(a. 32second time base)
ON/OFF time ratio in Micro
cooking
(a. 54second time base)
(a. 54second time base)
The I/O signal of the LSI are detailed in the following table.
DESCRIPTION OF LSI
Click on the first or last page to see other R-895M (serv.man7) service manuals if exist.