Power Circuit Protection And Self Diagnosis Display; Power Circuit Protection; Power Circuit Problem Self Diagnosis - Sanyo C20VTI I-M Service Manual

3. Power Circuit Protection and
3-2.
Power circuit problem self diagnosis
Self Diagnosis Display
1) Enter to the service mode by pressing and holding the
-
STOP button for more than 10 seconds.
This unit display the results of the self diagnosis it carries
out in two digits on the screen when problems occur.
Although these digits will only roughly tell you what kind
of problems have occurred, use them when servicing the
unit.
3-1. Power circuit protection
Detection
of the TV
section
power failure
If the pin-22 of IC800(CPU) voltage is less than 1.5V
for more than 1.0 second.
1
RL621 is opened
TV power is turned OFF {TV set goes to the standby
mode. However, VCR power is ON).
G
Detection of the VCR section power failure
If the pin-23 of IC800(CPU) voltage is less than 1.5V
for more than 1.0 second.
*
VCR and TV powers are turned OFF.
2) Select" 1. PF" using the Programme UP/DOWN
(PA/P
V)
button.
Service
mode display
DATA
1.PF 01
Self diagnosis results are as follows;
DATA
00
Problem
No problem
01 I TVsection power failure
02 I VCR section power failure
03
I
Both of TV and VCR section power failure
Be sure to set the data of power failure to " 00 " after
To
exit from the power circuit protecting mode,
servicing.
Press the
Power ON/OFF button of the TV set or
the remote control transmitter.
When the power is not turned on by pressing the
Power ON/OFF button, repair the power circuit.
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