Panasonic KX-MB783BR, Service Manual

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56
KX-MB783BR
2. Safety Protection
a. 2 thermostats are provided with the unit, and the heater circuit is shut down when their surface temperatures became over
160
°
C.
b. The heater control circuit of IC300 has the built-in function that the software turns off the heater control automatically if the
heater is not turned ON every a fixed time.
c. When the temperature became over 250
°
C, the heater control circuit of IC300 is turned off forcedly and system reset
(IC300-AC18pin becomes Low) will be executed.
The correspondence readings between temperature measured by thermistor and HEX readings
Temperature
[C
°
]
AD value HEX reading Temperature
[C
°
]
AD value HEX reading Temperature
[C
°
]
AD value HEX reading
0 252 FC 84 202 CA 168 93 5D
1 251 FB 85 200 C8 169 92 5C
2 251 FB 86 199 C7 170 91 5B
3 251 FB 87 198 C6 171 90 5A
4 251 FB 88 197 C5 172 89 59
5 251 FB 89 196 C4 173 88 58
6 251 FB 90 195 C3 174 87 57
7 250 FA 91 193 C1 175 86 56
8 250 FA 92 192 C0 176 85 55
9 250 FA 93 191 BF 177 84 54
10 250 FA 94 190 BE 178 83 53
11 249 F9 95 188 BC 179 82 52
12 249 F9 96 187 BB 180 81 51
13 249 F9 97 186 BA 181 80 50
14 249 F9 98 184 B8 182 79 4F
15 248 F8 99 183 B7 183 78 4E
16 248 F8 100 182 B6 184 77 4D
17 248 F8 101 181 B5 185 76 4C
18 248 F8 102 179 B3 186 75 4B
19 247 F7 103 178 B2 187 74 4A
20 247 F7 104 177 B1 188 74 4A
21 247 F7 105 175 AF 189 73 49
22 246 F6 106 174 AE 190 72 48
23 246 F6 107 173 AD 191 71 47
24 246 F6 108 171 AB 192 70 46
25 245 F5 109 170 AA 193 69 45
26 245 F5 110 168 A8 194 68 44
27 245 F5 111 167 A7 195 68 44
28 244 F4 112 166 A6 196 67 43
29 244 F4 113 164 A4 197 66 42
30 243 F3 114 163 A3 198 65 41
31 243 F3 115 162 A2 199 64 40