Sharp R-880B Service Manual page 25

Pin No. Signal I/O
38 XIN IN
39 XOUT OUT
40 VSS IN
41 P27 OUT
42 P26 OUT
43 P25 OUT
44 P24 OUT
45 P23 OUT
46-48 P22-P20 OUT
49-50 P17-P16 OUT
51-80 OUT
SEG39-SEG10
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
Power source voltage: -5V.
VC voltage of power source circuit input.
Bottom heater driving signal.
To turn on and off the bottom relay
(RY4). "L" level during grill (TOP AND
BOTTOM) cooking, Convection
cooking or Mix bottom cooking, "H"
level otherwise.
The heater relay turns on and off
within a 48 second time base in
accordance with the special program
in LSI.
Convection motor driving signal.
To turn on and off shut-off relay(RY1).
"L" level during CONVECTION; "H" level
otherwise. (Relay RY1 does not turn on
at preheating mode.)
Fan motor driving signal.
To turn on and off the fan motor relay
RY5. "L" level during cooking, or for 5
minutes after grill cooking or Mix cooking
for a while after convection. "H" level
otherwise.
Terminal not used.
Common data signal: COM5.
Connected to LCD (Pin No. 37)
Segment data signal.
Connected to LCD. No connection in LCD.
Segment data signal.
Connected to LCD. No connection in LCD.
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (90) ....................SEG45 (51)
SEG 1 (89) ....................SEG44 (50)
SEG 2 (88) ....................SEG43 (49)
SEG 3 (87) ....................SEG42 (48)
SEG 4 (86) ....................SEG41 (47)
SEG 5 (85) ....................SEG40 (46)
SEG 6 (84) ....................SEG39 (45)
SEG 7 (83) ....................SEG38 (44)
SEG 8 (82) ....................SEG37 (43)
SEG 9 (81) ....................SEG31 (31)
SEG10 (80) ................... SEG30 (30)
SEG11 (79) ................... SEG29 (29)
SEG12 (78) ................... SEG28 (28)
SEG13 (77) ................... SEG27 (27)
SEG14 (76) ................... SEG26 (26)
SEG15 (75) ................... SEG25 (25)
SEG16 (74) ................... SEG24 (24)
SEG17 (73) ................... SEG23 (23)
SEG18 (72) ................... SEG22 (22)
SEG19 (71) ................... SEG21 (21)
SEG20 (70) ................... SEG20 (20)
SEG21 (69) ................... SEG19 (19)
SEG22 (68) ................... SEG18 (18)
23
Description
Power output ON time
100 % 48 sec.
90 % 44 sec.
80 % 40 sec.
70 % 36 sec.
60 % 32 sec.
50 % 26 sec.
40 % 22 sec.
30 % 16 sec.
20 % 12 sec.
10 % 8 sec.
During
cooking
(Convection)
ON
OFF
ON
During cooking or for 5 minutes after
grill, mix or for awhile after convection.
LSI signal (Pin No.) LCD (Pin No.)
SEG23 (67) ................. SEG17 (17)
SEG24 (66) ................. SEG16 (16)
SEG25 (65) ................. SEG15 (15)
SEG25 (65) ................. SEG15 (32)
SEG26 (64) ................. SEG14 (14)
SEG27 (63) ................. SEG13 (13)
SEG28 (62) ................. SEG12 (12)
SEG29 (61) ................. SEG11 (11)
SEG30 (60) ................. SEG10 (10)
SEG31 (59) ................... SEG 9 ( 9)
SEG32 (58) ................... SEG 8 ( 8)
SEG33 (57) ................... SEG 7 ( 7)
SEG34 (56) ................... SEG 6 ( 6)
SEG35 (55) ................... SEG 5 ( 5)
SEG36 (54) ................... SEG 4 ( 4)
SEG37 (53) ................... SEG 3 ( 3)
SEG38 (52) ................... SEG 2 ( 2)
SEG39 (51) ................... SEG 1 ( 1)
P16 (50) ...................... SEG32 (38)
P17 (49) ...................... SEG33 (39)
P20 (48) ...................... SEG34 (40)
P21 (47) ...................... SEG35 (41)
P22 (46) ...................... SEG36 (42)
R-880B
OFF time
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.
H.
GND
OFF
L
H.
GND
L