Service Modes, Error Codes, And Fault Finding - Philips TC7.1U CA Service Manual

5. Service Modes, Error Codes, and Fault Finding

Index of this chapter:
5.1 Service Modes
5.2 Error Codes
5.3 Fault Finding
5.1 Service Modes
For an explanation of the Factory Mode, see chapter 8
"Alignments".
5.2 Error Codes
Not applicable for this chassis.
5.3 Fault Finding
5.3.1 Can Not Power "On"
Can not Power
On
Fuse OK?
Y
N
Check B+ Ok?
Y
Check the
+5VSTand +12V
Check Horizontal Scan
circuit: Check H-Vcc
and H-out of IC200
Check Q401, T401 and
Q411
Service Modes, Error Codes, and Fault Finding
Is it IC801 Pin 1
shorted to earth?
N
Y
Check/Replace
IC801
(1) Check if B+ shorted to earth.
(2) To check whether D820 are turnoff. And whether C823
shorted.
N
(3) To check whether Q823 and Q822 are working normally.
1.check the power supply of IC200 is ok?
2.Is Q080,Q081 are working normally?
3. Q821, Q825, IC090 IC201/IC202 are working ok?
Figure 5-1 Flow chart "Can not power on".
Is DB801 OK?
N N
Y
Replace DB801
TC7.1U CA 5.
Check the components such as
C801, C802, C806, C807
H_17090_035.eps
300307
EN 9