Service Manual
Page 4
... frayed wiring. Such alterations might not be lost if the replacement component differs from the picture tube. 18. Hot Chassis Warning: Some TV receiver chassis are indicated in -lineÓ picture tubes are otherwise damaged should be safely serviced only if the AC power plug is... one conductor of the AC source. These safety features and the protection they give might create shock, fire or other hazards. 1-2 Samsung Electronics Never handle the picture tube by close-tolerance, safety-related components and adjustments. Re-measure the voltage between components and the printed...
... frayed wiring. Such alterations might not be lost if the replacement component differs from the picture tube. 18. Hot Chassis Warning: Some TV receiver chassis are indicated in -lineÓ picture tubes are otherwise damaged should be safely serviced only if the AC power plug is... one conductor of the AC source. These safety features and the protection they give might create shock, fire or other hazards. 1-2 Samsung Electronics Never handle the picture tube by close-tolerance, safety-related components and adjustments. Re-measure the voltage between components and the printed...
Service Manual
Page 10
Specifications and IC Data 2-4 One Chip TV-processor SOUND IF INPUT 1 EXT AUDIO INPUT 2 VCO REF FILTER 3 VCO REF FILTER 4 PLL LOOP FILTER 5 IF VIDEO OUTPUT 6 BUSINPUT : SCL 7 BUSINPUT : SDA 8 BANDGAP DECOUPLING 9 ... FILTER BURST PHASE DET 35 X-TAL (PAL-N (4.43)/PAL-M (3.58)) 34 X-TAL (3.58) 33 SECAM REF OUTPUT 32 (R-Y) INPUT 31 (B-Y) INPUT 30 (R-Y) OUTPUT 29 (B-Y) OUTPUT 2-4 Samsung Electronics
Specifications and IC Data 2-4 One Chip TV-processor SOUND IF INPUT 1 EXT AUDIO INPUT 2 VCO REF FILTER 3 VCO REF FILTER 4 PLL LOOP FILTER 5 IF VIDEO OUTPUT 6 BUSINPUT : SCL 7 BUSINPUT : SDA 8 BANDGAP DECOUPLING 9 ... FILTER BURST PHASE DET 35 X-TAL (PAL-N (4.43)/PAL-M (3.58)) 34 X-TAL (3.58) 33 SECAM REF OUTPUT 32 (R-Y) INPUT 31 (B-Y) INPUT 30 (R-Y) OUTPUT 29 (B-Y) OUTPUT 2-4 Samsung Electronics
Service Manual
Page 11
... 3. Do not tamper with the Ò AdjustmentÓ screen of the Factory Mode menu. Make the following adjustments AFTER setting up the TV for factory use in the Service Mode. 2. The set must be done in 21Ó and 25Ó models) 3-2 Factory ("SERVICE")... Mode 1. After completing the Factory Mode adjustments, turn the power switch OFF. w w Samsung Electronics 3-1 Access the Adjustment Mode by pressing the CHANNEL keys (v,w). 4. WHEN EEPROM (IC902) IS REPLACED (1) When IC902 is replaced, all adjustments after...
... 3. Do not tamper with the Ò AdjustmentÓ screen of the Factory Mode menu. Make the following adjustments AFTER setting up the TV for factory use in the Service Mode. 2. The set must be done in 21Ó and 25Ó models) 3-2 Factory ("SERVICE")... Mode 1. After completing the Factory Mode adjustments, turn the power switch OFF. w w Samsung Electronics 3-1 Access the Adjustment Mode by pressing the CHANNEL keys (v,w). 4. WHEN EEPROM (IC902) IS REPLACED (1) When IC902 is replaced, all adjustments after...
Service Manual
Page 15
... the specified test equipment or its equivalent. 4. Correct impedance matching is selected, the Factory Mode Data does not change. Connect the TV only to connect or disconnect any parts. 8. Samsung Electronics 3-5 Check the basic characteristics such as specified on . Observe the picture for good black and white details. When inserting signal markers...
... the specified test equipment or its equivalent. 4. Correct impedance matching is selected, the Factory Mode Data does not change. Connect the TV only to connect or disconnect any parts. 8. Samsung Electronics 3-5 Check the basic characteristics such as specified on . Observe the picture for good black and white details. When inserting signal markers...
Service Manual
Page 16
...its lead-in the center area of the picture tube. 2. The failsafe circuit check is no high voltage adjustment on this chassis. The TV should be unnecessary. To restore picture and sound, temporarily turn off the AC power supply. If the chassis or parts of the receiver....shows that the high voltage does not exceed 29.5KV under any conditions. Adjust the FOCUS control for about 30 seconds, switch power ON. 3-6 Samsung Electronics Adjust the tuning control for ÒNormalÓ. 3. However, the receiver must not exceed 29.5KV. 4. The degaussing coil operates for ...
...its lead-in the center area of the picture tube. 2. The failsafe circuit check is no high voltage adjustment on this chassis. The TV should be unnecessary. To restore picture and sound, temporarily turn off the AC power supply. If the chassis or parts of the receiver....shows that the high voltage does not exceed 29.5KV under any conditions. Adjust the FOCUS control for about 30 seconds, switch power ON. 3-6 Samsung Electronics Adjust the tuning control for ÒNormalÓ. 3. However, the receiver must not exceed 29.5KV. 4. The degaussing coil operates for ...
Service Manual
Page 20
So, to cut the leakage current flowing through Q903 (R812) is required for protecting the G-port (Q801). 3-10 Samsung Electronics The power consumption reduction circuit cuts leakage current. During power ON, however, it is necessary to reduce power consumption, it becomes high (...VT (33V) during stand-by (Picture OFF). When the voltages across R803 become less than 3.5V, the S-D current (Q801) is shorted. But, the TV functions normally and only the power consumption during stand-by , the voltage of the power control port (micom IC) becomes low (0V). If the power...
So, to cut the leakage current flowing through Q903 (R812) is required for protecting the G-port (Q801). 3-10 Samsung Electronics The power consumption reduction circuit cuts leakage current. During power ON, however, it is necessary to reduce power consumption, it becomes high (...VT (33V) during stand-by (Picture OFF). When the voltages across R803 become less than 3.5V, the S-D current (Q801) is shorted. But, the TV functions normally and only the power consumption during stand-by , the voltage of the power control port (micom IC) becomes low (0V). If the power...