Sanyo PLC-XU300A - PIN code lock

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Chassis Block Diagrams
IC301
SCALER
IC9885
SUB CPU
LAMP LP900
AC
SW902
THERMAL SW
LINE
FILTER
A901
LAMP
BALLAST
SW901
LAMP COVER-SW
LAMP_DET
IC9882
INVERTER
13 10
89
2 5 4 1 1 3
K8R K6R
K8H K8S
12
POWER-ON:H
MAIN
POWER
Power
Control
LAMP_DET
285
14 9 8
7 21
15 16
IC4891
FANERR
4
1 2
CHO_TXD
CHO_RXD
LAMP_SCI
PW_MASTER_SDO
PW_MASTER_SDi
PW_MASTER_SCK
LAMP_PWM_A
Lamp control