Memjet AS-1180C, Service Manual

Page: 91 / 181

SECTION 4
DISASSEMBLY AND ASSEMBLY
89
MPCA (Main Printed Circuit Assembly) Connections
The following chart shows where the connections to the MPCA come from and a brief
description of what they are used for (what they do).
LABEL COMING FROM DESCRIPTION
J1002
Driver Printed Circuit
Assembly (DPCA)
Power Supply.
J551 Interface I/O board Clutch Control.
J703 Interface I/O board Feeder Sensor Control.
P2004
Feeder Encoder Reader
Board
Feeder Encoder Control.
P2002 Lower Clamshell
Service Station Home Sensor, Service Station Index
Sensor, Service Station Lifts Up Sensor, Exit Sensor,
Entry Sensor, Black Mark Sensor, Clamshell
Open/Closed Switch.
P2006
Driver Printed Circuit
Assembly (DPCA)
Motor PWM Control/Encoder signals for ( a ) Print
Engine Paper Motor, ( b ) Print Engine Pump Motor,
( c ) Feeder Motor, ( d ) Wiper Motor
J35
Control Buttons Power/Paper/Cancel Buttons/LED
P1
Pen Driver Printed Circuit
Assembly (MPCA)
Printhead QAI Bus and 2.5 VDC QAI power, 3.3
VDC logic power for Printhead, VPOS enable &
VPOS power good signal, DOUT from Printhead,
Printhead reset lines, 5 VDC power for current sense
buffer, analog current sense line from PPCA,
pushbutton (2) inputs to MPCA.
P2005
Ink level PCA, Pinch Valve,
Ink Cartridge QAI
interfaces
Ink Level Optical Sensors, Print Engine
Accelerometer (level sense), Pinch Valve Actuator
and Position Sensors, Ink Cartridge QAI, Temperature
Sensor.
P2003
Service Station Lifter Motor
& Encoder, Service Station
Translation Motor
Service Station Lifter Arm and translation drive
signals.
J20
Pen Driver Printed Circuit
Assembly (PPCA)
Primary 24 VDC supply to PPCA.
J2001 Upper Clamshell
Printhead Latch solenoid, Printhead Latch
Open/Closed Sensor, Label Gap IR transmitter LED.
J1000
Power Button ON/OFF Switch.
J250 (CAT-5)
PPCA Data input to Printhead.
J260 (CAT-5)
PPCA Data input to Printhead.