Sharp 13VT-K100 Service Manual Page 12
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13VT-K100/150
13VT-CK10
12
INSTALLATION AND SERVICE INSTRUCTIONS
Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic
screwdriver or TV alignment tools.
(2) Before performing adjustment, TV set must be on at least 15 minutes.
HIGH VOLTAGE CHECK
High voltage is not adjustable but must be checked
to verify that the receiver is operating within safe
and efficient design limitations as specified checks
should be as follows:
1. Connect an accurate high voltage meter between
ground and anode of Picture tube.
2. Operate receiver for at least 15 minutes at 120V AC
line voltage, with strong air signal or properly tuned
in test signal.
3. Set to Service mode on, "Mute" and bus data 1(Y-
mute on).
4. The voltage should be approximately 25.4kV (at zero
beam). If a correct reading cannot be obtained,
check circuitry for malfunctioning components.
After the voltage test, "Mute" and bus data "0" (Y-
mute off).
CIRCUIT PROTECTION
The receiver is protected by a 4.0A fuse (F701), mounted
on PWB-A, wired into one side of the AC line input.
X-RADIATION PROTECTOR CIRCUIT
TEST
After service has been performed on the horizontal
deflection system, high voltage system, or B+ system,
test the X-Radiation protector circuit to ascertain proper
operation as follows:
1. Apply 120V AC using a variac transformer for
accurate input voltage.
2. Allow for warm up and using the remote controller,
set the brightness level and contrast level to
maximum.
3. Check the voltage of test point TP653. (It’s voltage
should be about 10.1V DC.)
4. Apply external 13.1V DC at TP653 by using an
external DC supply. The increased voltage will cause
the horizontal oscillator to stop and the TV to shut
off.
5. To re-start the oscillator, remove the external DC
power supply and short together TP651 and TP652.
Once the TV set operates normally again, remove
the short between TP651 and TP652.
- SERVICE MANUAL 1
- BEFORE RETURNING THE RECEIVER 3
- (Fire & Shock Hazard) 3
- SAFETY NOTICE 3
- (Continued) 3
- ELECTRICAL SPECIFICATIONS 6
- Description Of Controls 7
- DISASSEMBLY AND REASSEMBLY 9
- 13VT-K100/150 11
- 13VT-CK10 11
- HIGH VOLTAGE CHECK 12
- CIRCUIT PROTECTION 12
- X-RADIATION PROTECTOR CIRCUIT 12
- 2. Adjustment Item selection 13
- 3. Data number selection 13
- 1. Service mode 13
- To enter the service mode 13
- To exit service mode 13
- Vertical-Size adjustment 16
- Caption Position Adjustment 16
- (Horizontal) 16
- PRECAUTIONS IN REASSEMBLING 17
- (TOP VIEW) 18
- (BOTTOM VIEW) 19
- MECHANICAL UNITS 20
- Guide roller height 21
- Torque gauge 26
- Supply reel disk 26
- Cassette torque meter 26
- 1.5 ± 0.25mm 28
- CHECKING THE BRAKE TORQUE 29
- CH-1 CH-2 33
- (DIRECT DRIVE) MOTOR 34
- INSTALLING THE SHIFTER 37
- ASSEMBLY OF CASSETTE HOUSING 39
- SERVO CIRCUIT ADJUSTMENT 40
- ADJUSTMENT OF HEAD SWITCH 40
- ING POINT 40
- ADJUSTMENT OF EP STILL PIC 41
- TURE VERTICAL SYNC 41
- Replace defective parts 51
- TROUBLESHOOTING OF TV SECTION 52
- CHASSIS LAYOUT 55
- BLOCK DIAGRAM OF TV SECTION 56
- BLOCK DIAGRAM OF VCR SECTION 57
- OVERALL SCHEMATIC DIAGRAM 62
- WAVEFORMS 63
- PARTS LIST 72
- LISTE DES PIECES 72
- PWB-A: DUNTK9489WEV2 73
- MAIN Unit (Continued) 73
- PWB-D: DUNTK9518WEV2 79
- FRONT AV Unit 79
- PWB-C: DUNTK9490WEV2 80
- POWER Unit 80
- POWER Unit (Continued) 81
- PWB-B: DUNTK8606WEV4 81
- CRT Unit 81
- MECHANISM CHASSIS 82
- SCREW, NUTS AND WASHERS 82
- MECHANISM CHASSIS PARTS 83
- CASSETTE HOUSING CONTROL 84
- CABINET AND MECHANICAL PARTS 86
- PACKING OF THE SET 88
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