Sharp R-870B, Service Manual

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R-870B
23
38 XIN IN Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the crystal oscillation circuit with
respect to XIN terminal.
39 XOUT OUT Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
40 VSS IN Power source voltage: -5V.
VC voltage of power source circuit input.
41 P27 OUT Bottom heater driving signal.
To turn on and off the bottom relay
(RY4). "L" level during grill (TOP AND
BOTTOM) cooking, or Convection
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.
42 P26 OUT 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.)
43 P25 OUT 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.
44 P24 OUT Terminal not used.
45 P23 OUT Common data signal.
Connected to LCD (Pin No. 37). No connection in LCD.
46-48 P22-P20 OUT Segment data signal.
Connected to LCD. No connection in LCD.
49-50 P17-P16 OUT Segment data signal.
Connected to LCD. No connection in LCD.
51-80
SEG39-SEG10
OUT Segment data signal.
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) SEG20 (70) ................. SEG20 (20)
SEG 1 (89) ....................SEG38 (50) SEG21 (69) ................. SEG19 (19)
SEG 2 (88) ....................SEG37 (49) SEG22 (68) ................. SEG18 (18)
SEG 3 (87) ....................SEG36 (48) SEG23 (65) ................. SEG17 (17)
SEG 4 (86) ....................SEG35 (47) SEG24 (66) ................. SEG16 (16)
SEG 5 (85) ....................SEG34 (46) SEG25 (65) ................. SEG15 (15)
SEG 6 (84) ....................SEG33 (45) SEG26 (64) ................. SEG14 (14)
SEG 7 (83) ....................SEG32 (44) SEG27 (63) ................. SEG13 (13)
SEG 8 (82) ....................SEG31 (43) SEG28 (62) ................. SEG12 (12)
SEG 9 (81) .......................... NC (31) 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)
81 SEG9 OUT Segment data signal.
Connected to LCD. No connection in LCD.
Pin No. Signal I/O Description
ON
OFF
During
cooking
L
GND H.
(Convection)
ON
OFF
During cooking or for 5 minutes after
grill, mix or for awhile after convection.
L
GND H.
Power output ON time OFF time
100 % 48 sec. 0 sec.
90 % 44 sec. 4 sec.
80 % 40 sec. 8 sec.
70 % 36 sec. 12 sec.
60 % 32 sec. 16 sec.
50 % 26 sec. 22 sec.
40 % 22 sec. 26 sec.
30 % 16 sec. 32 sec.
20 % 12 sec. 36 sec.
10 % 8 sec. 40 sec.