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37EM-33H
CA-1 Chassis
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SHARP 37DM-23H
General Information Also Covers 37EM-33H CA-1 Chassis Recommended Safety Parts
Item Part No.
VB34EAC0136*N
6. For "a" thru j selections. Adjustment to a selection can be made by pressing buttons UP * DOWN ). A colour bar is displayed on the OSD to indicate the adjustment position, together with hexadecimal numbers (Not for GII adjustment).
4. Adjust focus potentiometer to obtain maximum definition. 4. G2 Adjustment 1. Apply mains voltage of 220 V AC/50 Hz to TV. 2. Receive MONOSCOPE PATTERN signal to a level between 60 and 80 dBuV. 3. Apply 10 K* to the anode of D1012 and DC 5V to it through the diode. 4. Press the TEXT key of R/C and set to level. 5. Set to the point where the raster disappears on the screen VR of FBT.
X= 0.290 ± 0.015 Y= 0.284 ± 0.015 g) Exit Service Mode and check colour coordinates `X' and `Y' at 20 and 120 NITS. It may be necessary to repeat procedure NOTE: Locations: GAIN R alter `X' coordinate; GAIN G alter the `Y' coordinates; GAIN B alter the `X' and `Y'coordinates. CHILD LOCK CANCEL The following process describes how to cancel actual password (PIN) when the customer forgets code. 1. Switch ON TV set. 2. Press button DOWN * on TV and 0n on R/C simultaneously. 3. Press MENU button on R/C to input menu. 4. Using buttons UP CH DOWN move to * position. 5. Press MENU button again. 6. Select PIN and input new PIN (Please do not forget it) 7. Select EXIT and press MENU button again.
For "k" Selection. NVM storage location settings variants.
Description
S CRT Ass'y, 34 cm(14") with Deflection Yoke, Purity Magnet and Wedges Wire, Grounding strap Degaussing Coil Tuner Photo Coupler Coil H-Volt Transformer Transformer 0.1 250V Mylar 3300p 4kV Ceramic 11/3W Fuse Resistor 2.2 1/3W Fuse Resistor 5.6 1/3W Fuse Resistor 11/3W Fuse Resistor 5.6 1/3W Fuse Resistor 11/2W Fuse Resistor 3.3k 1/2W Fuse Resistor 8.2M 1/2W Solid 8.2M 1/2W Solid Plug Plug Fuse T3.15A Power Socket CD
TU201 IC701 L701 T601 T700 C702 C722 R240 R305 R504 R506 R512 R603 R611 R721 R722 P701 P702 F701 S701 SC881
QEARC0002BMZZ RCILG0415BMZZ RTUNH0125BMZZ RH-FX0103BMZZ RCiLF0157BMZZ RTRNF2047BMZZ RTRNZ0535BMZZ RC-FZ0070BMZZ RC-KZ0106GEZZ RR-XZ0100BMZZ RR-XZ0204BMZZ RR-XZ0109BMZZ RR-XZ0100BMZZ RR-XZ0109BMZZ RR-XZ0200BMZZ RR-XZ0242BMZZ VRC-UA2HG825K VRC-UA2HG825K QPLGN0304CEZZ QPLGN0207CEZZ QFS-C3226CEZZ QSW-P0588CEZZ QSOCV0842CEZZ
S S S S S S S S J S S S S S S S R R R R R R R
AM AY AD AL AY AR AD AG AB AB AB AB AB AB AB AA AA AB AA AE AP AH
In order to have access to the desired storage location, buttons UP * DOWN should be pressed, as required, to obtain a higher or lower location, respectively. Bear in mind that, for storage location indication a hexadecimal numerical system is used, instead of a decimal system. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11 ..........19, 1A, 1B, 1C, 1D, 1E, 1F, 20, 21, 99, 9A, 9B, 9C, 9D, 9E, 9F, A0, A1, ..........., B0..........., C0..........., D0..........., E0..........., F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, FA, FB, FC, FD, FE, FF. From the last location FF to the first 00 can be reached by increasing and from first to last by decreasing. Once the storage location to be varied has been selected, its value can be modified by the bits that form part of the storage location numerical buttons, numbers 0 to 7, respectively. This switches its binary number from and between 0 and 1 each time one of the buttons is pressed. 0=20 1, 1 W=21=2, 2=22 4, ..... (See Tables on next page). · PIF/AGC Adjustment 1. VCO + AFT Adjustment 1.Connect the output of SSG (Standard Signal Generator) to the tuner IF output terminal. · SSG output: 38.9 MHz (CW) ±5 kHz). · SSG output level: approx. 90 dBuV. 2. Enter into Service Mode. 3. Push CH UP until AFT appears. 4. Press button on R/C. Setting is made automatically. During this setting the colour bar shall go from red to yellow. When setting is finished, colour bar disappears and BSTOP (bus stop) is shown on screen. 5. Switch set OFF and ON again, setting is now memorized. 2. RF-AGC Out-In Adjustment (12C BUS) 1. Receive the "COLOUR BAR" signal (Channel E-12). · Signal strength: 60 dBuV. 2. Enter into Service Mode. 3. Push CH UP until AGC appears. 4. Press button on R/C. Setting is made automatically. During this setting the colour bar shall go from red to yellow. When setting is finished, colour bar disappears and BSTOP (bus stop) is shown on screen. 5. Switch set OFF and ON again, setting is now memorized. · Screen Adjustment 3. Focus Adjustment 1. Apply mains voltage of 220 V AC/50 Hz to TV. 2. Receive Phillips pattern signal to a level between 60 and 80 dBuV. 3. Set contrast to 10/10, brightness to 5/10 and colour 0/10.
· GEOMETRY ADJUSTMENT PROCEDURE 1. H-SHFT a) Receive Philips pattern signal. b) When * UP button is pressed, picture moves to the left. c) When * DOWN button is pressed, picture moves to the right. d) Adjust the horizontal location to obtain picture centering (fig. 1) 2. V-SHFT a) Receive Philips pattern signal. b) When * UP button is pressed, picture moves up. c) When * DOWN button is pressed, picture moves down. d) Adjust the horizontal location to obtain picture centering (fig. 2) 3. V-AMPL a) Receive Philips pattern signal. b) When * UP button is pressed, vertical size of picture increases. c) When * DOWN button is pressed, vertical size of picture decreases. d) Adjust the vertical size to obtain overscan (fig. 3). 4. V-SLOP a) Receive Philips pattern signal. b) When .* UP button is pressed, upper picture scanning decreases and lower picture scanning increases. c) When * DOWN button is pressed, upper picture scanning increases and lower picture scanning decreases. d) Adjust the vertical symmetry to obtain symmetrical scanning between upper and lower picture (fig. 4). COLOUR ADJUSTMENT 5. V-DLY a) Receive Philips pattern signal. b) When * UP button is pressed, luma phase delays. c) When * DOWN button is pressed, chroma phase delays. d) Adjust the chroma-luma delay. The following adjustments are only required when the Picture Tube is changed. 6. "GAIN R", "GAIN G", "GAIN B". a) Adjust G2. b) Tune in white card. c) Adjust colour to minimum. d) Position colourmeter in the center of screen. e) Using brightness and contrast buttons, select a luminance of 120 nits. f) Operate again in Service Mode and select location GAIN R, GAIN B to obtain colour coordinates:
Fig. 1
Safety Notes
IMPORTANT SERVICE NOTES Maintenance and repair of this receiver should be carried out by qualified service personnel only. SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE When servicing the high voltage system, remove static charge from it by connecting a 10 k ohm resistor in series with an insulated wire (such as a test probe) between picture tube ground tag and high voltage lead (AC line cord should be disconnected from AC outlet). 1.Picture tube in this receiver employs integral implosion protection. 2.Replace with tube of the same type number for continued safety. 3.Do not lift picture tube by the neck. 4.Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely. X-RAY This receiver is designed so that any X-Ray radiation is kept to an absolute minimum. Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed. 1.When repairing the circuit, be sure not to increase the high voltage to more than 30.0 kV (1100uA Beam currrent) for the set. 2.To keep the set operating normally, be sure to maintain the high voltage at 24.5kV Plus Minus 1.5kV (at a beam current of 1100uA). The set has been factory adjusted to the above mentioned high voltage. If there is a possibility that the high voltage fluctuates as result of the repairs, never forget to check for such high voltage after the work. 3. Do not substitute a picture tube with unauthorized types or brands which may cause excess X-Ray radiation. BEFORE RETURNING THE RECEIVER In addition to the checks necessary as a result of a repair having been carried out, the following additional safety checks should also be made before returning the unit to the user. 1.Inspect all lead insulation to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver. 2.Inspect all protective devices such as nonmetallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields: isolation resistor-capacity networks, mechanical insulators, etc. 3.Apply test voltage of 3000 volts between live parts and accessible metal parts for 3 seconds. SERVICE MODE FUNCTION This mode function is provided to assist with the settings of those adjustments that may vary from one Picture Tube to another, or between models. In order to use the Service Mode 1. Press main switch to OFF. 2. Connect Test Pattern signal to antenna terminal. 3. Press DOWN and CH UP buttons and main switch to ON simultaneously. 4. --SERV--will appear on screen. Service mode is now entered. 5. Select adjustment using buttons UP CH DOWN. To exit service mode, press main switch to OFF or press MENU button on R/C.
Fig. 2
Fig. 3
Fig. 4
SHARP 37DM-23H
Service Adjustments Cont'd
Remote Control Diagram
Waveforms
SHARP 37DM-23H
Main Diagram