DO NOT CHANGE ANY MODULE UNLESS THE SET IS SWITCHED OFF
The mains supply part of the switch mode power supply's transformer is live.
Use an isolating transformer.
The receiver complies with the safety requirements.
SAFETY PRECAUTIONS
The service of this TV set must be carried out by qualified persons only. Components marked with the warning symbol on the
circuit diagram are critical for safety and must only be replaced with an identical component.
- Power resistor and fused resistors must be mounted in an identical manner to the original component.
- When servicing this TV, check that the EHT does not exceed 26kV.
TV set switched off:
Make short-circuit between HV-CRTclip and CRT ground layer.
Short C808 before changing IC841 or other components in primary side of the SMPS part.
Measurements:
Voltage readings and oscilloscope traces are measured under the following conditions:
Antenna signal's level is 60dB at the color bar pattern from the TV pattern generator. (100% white, 75% color saturation)
Brightness, contrast, and color are adjusted for normal picture performance.
Mains supply, 220VAC, 50Hz.
1 Audio right output 0.5Vrms / 1 K
2 Audio right input 0.5Vrms /10K
3 Audio left output 0.5Vrms /1 K
4 GroundAF
5 Ground Blue
6 Audio left input 0.5Vrms/10K
7 Blue input 0.7Vpp / 75ohm
8 AV switching input 0-12VDC /1 OK
9 Ground Green
10-
11 Green input 0.7Vpp / 75ohm
12-
13 Ground Red
14 Ground Blanking
15 Red input 0.7Vpp/75ohm
16 Blanking input 0-0.4VDC, 1-3VDC/75
17 Ground CVBS output
18 Ground CVBS input
19 CVBS output 1Vpp/75ohm
20 CVBS input 1 Vpp / 75ohm
21 Ground
1 INTRODUCTION
11AK36 is a 90° chassis capable of driving 14° tubes at the appropriate currents. The chassis is capable of operating in PAL,
SECAM and NTSC standards. The sound system is capable of giving 3 watts RMS output into a load of 16 ohms. One page and
US Closed Caption is also provided. The chassis is equipped with a 21 pin Eu-Scart connector.
2 |
ACEC
