Service manual

24
DMO2420B
DMO2420R
DMO2420S
52 NC
_
Terminal not used.
53 XCOUT OUT Terminal not used.
54 XCIN IN Connected to VC.
55 NC
_
Terminal not used.
56 VCC IN Power source voltage: GND(0V).
The power source voltage to drive LSI is input to VCC terminal.
57 OSCSEL IN Connected to VC(-5V).
58 XOUT OUT Internal clock oscillation output.
Output to control oscillation input of XIN.
59 VSS IN Power source voltage: -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC.
60 NC Terminal not used.
61 XIN IN Internal clock oscillation frequency control input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.
62 NC
_
Terminal not used.
63-66 AIN3-AIN0 IN Terminal to change cooking input according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.
67 COM8 OUT Common data signal : COM8. Connected to LCD signal COM8.
68 COM9 OUT Common data signal : COM7. Connected to LCD signal COM7.
69 COM10 OUT Common data signal : COM6. Connected to LCD signal COM6.
70 COM11 OUT Common data signal : COM5. Connected to LCD signal COM5.
71 COM12 OUT Common data signal : COM4. Connected to LCD signal COM4.
72 COM13 OUT Common data signal : COM3. Connected to LCD signal COM3.
73 COM14 OUT Common data signal : COM2. Connected to LCD signal COM2.
74 COM15 OUT Common data signal : COM1. Connected to LCD signal COM1.
75-102
SEG67-SEG40
OUT Terminal not used.
103-142
SEG39-SEG0
OUT Segment data signal.
Connected to LCD.
The relation between signals and LCD are as follows:
LSI signal (Pin No.) LCD segment LSI signal (Pin No.) LCD segment
SEG 39 (103) .......................... SEG 1 SEG 19 (123) ......................... SEG 21
SEG 38 (104) .......................... SEG 2 SEG 18 (124) ......................... SEG 22
SEG 37 (105) .......................... SEG 3 SEG 17 (125) ......................... SEG 23
SEG 36 (106) .......................... SEG 4 SEG 16 (126) ......................... SEG 24
SEG 35 (107) .......................... SEG 5 SEG 15 (127) ......................... SEG 25
SEG 34 (108) .......................... SEG 6 SEG 14 (128) ......................... SEG 26
SEG 33 (109) .......................... SEG 7 SEG 13 (129) ......................... SEG 27
SEG 32 (110) .......................... SEG 8 SEG 12 (130) ......................... SEG 28
SEG 31 (111) .......................... SEG 9 SEG 11 (131) ......................... SEG 29
SEG 30 (112) .......................... SEG 10 SEG 10 (132) ......................... SEG 30
SEG 29 (113) .......................... SEG 11 SEG 9 (133) ......................... SEG 31
SEG 28 (114) .......................... SEG 12 SEG 8 (134) ......................... SEG 32
SEG 27 (115) .......................... SEG 13 SEG 7 (135) ......................... SEG 33
SEG 26 (116) .......................... SEG 14 SEG 6 (136) ......................... SEG 34
SEG 25 (117) .......................... SEG 15 SEG 5 (137) ......................... SEG 35
SEG 24 (118) .......................... SEG 16 SEG 4 (138) ......................... SEG 36
SEG 23 (119) .......................... SEG 17 SEG 3 (139) ......................... SEG 37
SEG 22 (120) .......................... SEG 18 SEG 2 (140) ......................... SEG 38
SEG 21 (121) .......................... SEG 19 SEG 1 (141) ......................... SEG 39
SEG 20 (122) .......................... SEG 20 SEG 0 (142) ......................... SEG 40
Pin No. Signal I/O Description