7. Electronic parts and servicing procedures
•
PFC (power factor connector)
•
SMPS (switched mode power supply)
•
controller board
board
description
PFC
Generates a stable DC voltage for the SMPS
Generates the power for the X-fan supply (380VM)
SMPS
Supplies the various voltages: ++12V and +12V for:
•
PMP
•
X-fan supply
•
preformatter
•
desktop input board
•
engine controller
•
power box fan
Supplies voltages for fans
controller
Receives and generates various control signals:
•
motor power control
•
lens motor control signals
•
ambient temperature feedback signal
•
ambient pressure feedback signal
•
pulse counters for fans
Communication I2C and JTAG
Connectors
1
8
7
9
12
13
14
19
20
21
15
17 18
16
2
3
4
5
6
Image 7-22
Power box: connectors
Connector
Description
1
+12V / ++12V to the engine controller
2
fan of the power box
3
power supply for fans 0..4
6
+12V / ++12V to the PMP, X-fan supply, preformatter, desktop input
12
JTAG + communication X-fan supply
13
I2C: communication with PMP
15
pulse counters from fans 0..7
16
pulse counters from fans 8..15
R59770141 GALAXY NH-12 20/02/2008
47
Summary of Contents for Galaxy NH-12
Page 1: ...Galaxy NH 12 Service manual R9040400 R59770141 00 20 02 2008...
Page 4: ......
Page 12: ...1 Safety guidelines 8 R59770141 GALAXY NH 12 20 02 2008...
Page 42: ...6 Projector layout 38 R59770141 GALAXY NH 12 20 02 2008...
Page 142: ...8 Optical parts and servicing procedures 138 R59770141 GALAXY NH 12 20 02 2008...
