37GQ-20FP SERVICE MANUAL SEJ37GQ20FP02 Issued: 9th June ‘00 SQUAD CHASSIS PAL / SECAM SYSTEM COLOUR TELEVISION 37GQ-20FP MODEL In the interests of user safety (required by safety regulations in some countries) the set should restored to its original condition and only parts identical to those specified should be used.
37GQ-20FP IMPORTANT SERVICE NOTES Maintenance and repair of this receiver should be done 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 10K ohm resistor in series with an insulated wire (such as test probe) between picture tube ground tag and high voltage lead.
37GQ-20FP SERVICE ADJUSTMENT •SERVICE MODE FUNCTION This mode funtion 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.
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37GQ-20FP 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,...
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37GQ-20FP ONE CHIP REGISTER 00: ONE CHIP REGISTER 01: ONE CHIP REGISTER 02: ONE CHIP REGISTER 03: ONE CHIP REGISTER 04: ONE CHIP REGISTER 05: ONE CHIP REGISTER 06: ONE CHIP REGISTER 07: ONE CHIP REGISTER 08: ONE CHIP REGISTER 09:...
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37GQ-20FP VH F1HIGH : U PPER WIND OW LIM IT FOR V HF1 PRG _NUM B ER: CU RREN T PRO GRA M ME NU MBE R W AITSUP : U PPER L IM IT DE LAY TIME FOR A UTO SEAR CH.
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37GQ-20FP VHF1_SP: STEP FOR AUTO SEARCH IN VHF1 BAND VHF3_SP: STEP FOR AUTO SEARCH IN VHF3 BAND UHF_SP: STEP FOR AUTO SEARCH IN VHF BAND OLD_PROGRAM: FOR FLASHBACK RETURN UHFHIGH: UPPER WINDOW LIMIT FOR UHF VHF3HIGH: UPPER WINDOW LIMIT FOR VHF3...
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37GQ-20FP BG_COARSE: THICK TUNING ADJUSTMENT FOR L AND BG 05H BG_FINE: FINE TUNING ADJUSTMENT FOR L AND BG LP_FINE: FINE TUNING ADJUSTMENT FOR L’ DELAY SEARCH: XXXXXXX0 -> SHOWS ‘PROGRAMME –‘ DURING AUTOSEARCH. XXXXXXX1 -> DHOWS ‘AUTO SEARCH’ DURING AUTOSEARCH...
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37GQ-20FP •GEOMETRY ADJUSTMENT PROCEDURE 1. HOR POS a) Receive Philips pattern signal. ∧ b) When button is pressed, picture moves to the left. ∨ c) When button is pressed, picture moves to the right. d) Adjust the horizontal location to obtain picture centering (Fig.1).
37GQ-20FP DESCRIPTION OF SCHEMATIC DIAGRAM NOTE: SAFETY NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 1. DISCONNECT THE AC PLUG FROM THE AC ohms. M= Megaohm). OUTLET BEFORE REPLACING PARTS. 2. All resistors are 1/8 watt. unless otherwise noted.
37GQ-20FP REF No. PARTS DESCRIPTION * CODE PART LIST Q 0706 VS2SA1037KQ-1 TRT BC807 SMD S AA REPLACEMENT PARTS Q 0707 RH-TX0217BMZZ TRT BC337 PHILIPS S AB Q 0708 VS2SC2412KQ-1 TRT 2SC2412 ROHM S AA Replacement parts which have special safety characteristics are identi- fied in this manual.
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37GQ-20FP REF No. PARTS DESCRIPTION * CODE REF No. PARTS DESCRIPTION * CODE L 0601 VP-CF4R7K0000 PEAK COIL 4,7UH 10% S AB C 0610 VCKYTV1HB223K CERAM C 22NF 50V 2125SMD S AA L 0602 VP-CF220K0000 PEAK COIL 22UH 10% S AA...
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37GQ-20FP REF No. PARTS DESCRIPTION * CODE REF No. PARTS DESCRIPTION * CODE R 0215 VRS-TV1JD561J 2125 560 OHM 5% 1/10W SMD S AA R 0606 VRD-RA2HD6R8J RES 6,8 OHM 5% 1/2W S AA R 0216 VRS-TV1JD470J 2125 47 OHM 5% 1/10W SMD...
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37GQ-20FP REF No. PARTS DESCRIPTION * CODE REF No. PARTS DESCRIPTION * CODE R 1009 VRS-TV1JD102J 2125 1KOHM 5% 1/10W SMD S AA DIODES R 1010 VRS-TV1JD273J 2125 27KOHM 5% 1/10W SMD S AA D 0811 RH-DX0551BMZZ DIODE LL4148 TFK SMD...
37GQ-20FP TROUBLESHOOTING TABLES. NO PICTURE Check Picture setting by R/C. Signal should be received. Check the tuner supply and band biases. Both must be approx. 5V DC Normal Is tuning voltage normal at Pin (2) of Tuner? Check Q1001, IC1001, IC1003 -Check the AGC Voltage: Pin (1) of Tuner.
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37GQ-20FP NO SOUND Check Sound setting by R/C. Signal should be received. Does approx. 20V DC appear on C710? Check D707, C710 Does Sound Signal appear at Pin(6) of IC801? Check IC801, C301 Audio Amplifier muted? Check IC1001, Q305 Check R304, Q301, Q302...
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37GQ-20FP NO RASTER Fuse Blown Check F701 Normal Check Voltage on C705 Replace Fuse (Approx. 325V DC) Fuse Blown Normal again Check Voltage on C711 Check IC701 Approx. 0V Abnormal (Approx. 105V DC) Normal Normal Check D708, D717 Check CRT connector K1...
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37GQ-20FP NO VERTICAL SCAN Is IC501 bias normal? Check R510, Q501, Check D709, D710, IC501 Q502, Q503 NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION Check IC801, C815, C816, R818 DEFECTIVE VERTICAL AMP. AND VERTICAL LINEARITY Readjust Vertical Size. Vertical size is abnormal...
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37GQ-20FP NO SPECIFIC COLOUR some colour produced in B/W Broadcast reception? Check IC801, C812, C813, R813, X801 the white balance properly adjusted? The Picture Colour is The Picture Colour is The Picture Colour is Red or cyan. green or magenta.