Appendix D-64 Product Overview Rev.D
Confidential
Impact Head
Temperature
Head
temperature
Thermistor VCC potential voltage ratio of thermistor resistance value and
R72 is read by the AD port of the CPU
Thermal Head
Temperature
Head
temperature
Thermistor VCC potential voltage ratio of thermistor resistance value and
R126 is read by the AD port of the CPU
Carriage
Motor
Step-Out
Mechanism Transparent
photo
Base of Q50 is driven by voltage drop of load resistor (R90);
phase data with no delay is taken out; and logical judgment is
performed by the GA port
Home
Position
Mechanism Photo IC Logical judgment of photo IC output is performed by the GA
port
Lever Timing
Detector
Mechanism Photo IC Logical judgment of photo IC output is performed by the GA
port
Front Cover Case Transparent
photo
Logical judgment of load resistor (R88) voltage drop is
performed by GA port
Rear Cover Case Transparent
photo
This signal is used for thermal unit sensor
Rear Cover
TM-H6000
Case Photo IC Logical judgment of photo IC output is performed by the GA
port
EP Timing
Pulse
EP unit Tacho-gene Waveform shaping (Q19) of sine wave output, and processing
by the CPU interrupt port with hysteresis (U28)
EP Reset EP unit Read switch Logical judgment of the GA port with time constant
DIPSW DIPSW Pull-up by resistor group (RM1, 2, 3, 4). "L" is read at On. Logical
judgment is performed by the CPU, GA
Table D-12 Detection circuits
Detector Function
Type of
Sensor Circuit
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