Daewoo DDT-21H9ZDF(21"), Service Manual

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FBT VOLTAG
-57-
Service Manual CP-099/FS
Fig : Power supply operation during TV set normal run
On normal run mode, I501 microcontroller pin 5(power) is set to Low
- Q503 is unconducting So, Q802 is couducting.
- So, Q802 collector is connected to the ground and Y801 switch relay is couducting and T801 SMPS
Transformer is supply v143V(CP-99FS), +115V(CP-099), S.B+, +12V, +5V.
*Power supply circuit diagram during TV set normal run
I503
STAND BY 5 V 11
STAND BY 3.3 V
143 V/115V
12 V
3.3 V
5.3 V
5 V
Sound B+
H.drive Trans
18
T801
SMPS
Trans-
former
T802
16
15
13
12
10
I811
I805
I807
I808
* POWER SUPPLY Voltage during TV set normal run.
MAIN B+ SOUND B+ TV 12V DVD 5V TV 5V DVD 3.3V
Pin 18 Pin 16 Pin 15 Pin 12 Pin 10 Pin 13
CP-099FS 143 2V 14.0 10% 14.0 10% 8.5 1V 8.5 1V 5.0 10%
CP-099 115 2V 12.0 10% 14.0 10% 8 1V 8 1V 5.0 10%
b) TV set on stand-by mode
* TV set circuit diagram on stand-by mode
CHASIS VIDEO
VERTICAL VERTICAL H.V at max. max Beam OH.V SCREEN HEATER
B+ 16.5V 45V beam cur rent current VOLTAGE VOLTAGE
CP-099FS 180 10% 12.0 1V 46 2V 27.0 1kV 1100 50 A 2kV and less 850-950DVC 6.2+0.1/-02Vrms
CP-099 190 10% 16.0 1V 46 2V 24.0 1kV 850 50 A 2kV and less 500-700VDC 6.2+0.1/-02Vrms
at ib=880
¥
A
SMPS TRANSFORMER VOLTAGE