Goodmans 1418R free download

File name Gd1418R.pdf

GOODMANS 1418 R General Information Also Covers DTC-14B1 VUP Daewoo CP-325 Matrix Item CRT Purity Adjustments - See Note 1 MAIN B + (+103V) ADJUSTMENT 1. Receive RETMA pattern signal. 2. Set the picture level to NORMAL mode. 3. Connect DC voltage meter to the TP7 and adjust VR801 for +103V DC. VCO/AFT ADJUSTMENT 1. APPARATUS CONNECTION & PRESETTING CONNECTION 1. Connect H-out of LSW-480 to X-axis of the oscilloscope and V-out of LSW-480 to Y-axis of the oscilloscope. 2. Connect the sweep signal output to TP1. 3. Set ATTENUATOR of LSW-480 to 30dB. 4. Supply 16.5V D.C. voltage (B+) to TP4. 5. Supply 4-5V D.C. voltage to TP5:VCO. 6. Supply 7-8V D.C. voltage to TP5:AFT. PRESET 1) Oscilloscope Scaling D.C level. b) Set the horizontal time display to X-Y c) Put the horizontal axis (X) to 1V/div. and the vertical axis (Y) to 2V/div. 2) LSW-480 MARKER FREQ. SETTING. Waveforms X-Ray Precautions X-RAY RADIATION PRECAUTION 1 Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not exceed the specified limit. The nominal value of the high voltage of this receiver is 25.5kv (14": 23.5kv) at max beam current. The high voltage must not, under any circumstances, exceed 27.5kv (14": 25.0kv). Each time a receiver requires servicing, the high voltage should be checked following the HIGH VOLTAGE CHECK procedure. It is recommended the reading of the high voltage be recorded as a part of the service records. It is important to use an accurate and reliable high voltage metre. 2. The only source of X-RAY RADIATION in this TV receiver is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as specified in the parts list. 3. Rotate the SUB-BRIGHTNESS VR (VR513) gradually CCW until the last beam disappears on the screen. COLOUR AMPLITUDE AND PHASE ADJUSTMENT 1. Receive a PAL/DEM Signal (Philips Model PM5518) 2. Connect the probe of an oscilloscope to R203 (TP6:B-Y output) 3. Adjust L510 and VR516 in order to make the waveform fine on the screen like Fig. 1. Fig. 1 Fig. 2 Fig. 1 Centre Convergence by Convergence Magnets Fig. 2 Circumference Convergence by DEF. Yoke B/G P-I fp(n+1) fs 31.9 33.4 31.9 33.5 fc 34.5 35.07 fp-2 36.9 37.5 fp 38.9 39.5 fs(n-1) 40.4 41 Connection for PIF Adjustments Fig. 3 Adjustment of magnets II. ADJUSTMENT OF VCO (B/G, I) 1. Connect the test point of LSW-480 to TP2. 2. Adjust L109 (ACO COIL) so that the P marker point is located on the reference level. Ill. ADJUSTMENT OF AFT B/G, I) 1. Connet the test point of LSW-480 to TP3 2. Adjust L108 (AFT COIL) so that the P marker point is located on the reference level. VCO Waveform Adjustments SCREEN & WHITE BALANCE ADJUSTMENT 1.This adjustment is to be made only after warming up at least 15 minutes. 2. Receive B,W pattern signal 3. Set the RGB Bias VR (RJ04, RJ13, RJ24) to MINIMUM. 4. Set the G, B Drive VR (RJ1 4, RJ22) to CENTER. 5. Set the CONTRAST, BRIGHTNESS, CO