Processing In Abnormality - Pioneer PDP-4271HD Service Manual
Plasma display system
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Also See for PDP-4271HD:
- Operating instructions manual (292 pages) ,
- Specification (2 pages) ,
- Service manual (39 pages)
Table of Contents
5
10.6 PROCESSING IN ABNORMALITY
Power supply and DC-DC converter
Circuit diagram
POWER SUPPLY Unit
SW_REG
Fan and temperature sensor
Circuit diagram
TANSHI Assy
SENSOR
FAN
Specifications for port monitoring
Port Name
SD/PD Indication Assigned Pin
FAN_NG 1
FAN
Abnormally high
TEMP2
temperature in the
MR
TRAP_SW
Circuit diagram
5
6
MAIN Assy
IIC Communication
Device
ASIC
DC/DC Converter
MODULE_Ucom
DIGITAL Assy
MAIN Assy
TEMP2
FAN_VCC
Drive
Circuit
V+3.3V_UCOM
Pull_up
Active
155
Shutdown with H
Shutdown when the
76
value exceeds the
predetermined value
TRAP_SW
PDP-4271HD
6
7
IIC Communication NG
3-wire serial Communication NG
FAN_CONT
FAN_NG1 (H act)
MTB MAIN Assy
V_3.3V_UCOM
TRAP_SW
MAIN_UCOM
PULL_D
7
8
MAIN_UCOM
PSW1 (L_act)
PON (Command)
MAIN_UCOM
8
A
B
C
D
E
F
177
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