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Professional

Video

Products

FIELD SERVICE GUIDE

MODEL 6810 AND 6820

VIDEO PROJECTOR

CAUTION!

USE AN ISOLATION TRANSFORMER WHEN SERVICING THIS

JBL International

8500 Balboa Blvd.

Northridge, CA 91329

(818) 893-8411

SAFETY NOTICE!

Rev. 4.28

JBL

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST

FAMILIARIZE HIMSELF WITH THE CHASSIS AND

AWARE OF

THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN

SERVICING ELECTONIC EQUIPMENT CONTAINING HIGH

VOLTAGES.

Содержание 6810

Страница 1: ...HEN SERVICING THIS JBL International 8500 Balboa Blvd Northridge CA 91329 818 893 8411 SAFETY NOTICE Rev 4 28 JBL ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSI...

Страница 2: ...ting the Chassis 8 Power Supply Panel 9 Deflection Panel 9 All Band Tuner 10 TS10 Tuner Interface Panel 10 TS10P Controller 11 Audio Video Input Output Module 11 Stereo SAP Decoder Module 11 Sound Pro...

Страница 3: ...nclude operation of the customer controls cable connections and plug seating acces sory connection antenna connections and operational mode checks On sets using on screen characters observation of the...

Страница 4: ...to the TS10P Con troller Figure 1 and regulated to 5Vdc to keep the Microcomputer alive A Power On key press at the Remote Transmitter or on set Keyboard tunes the set to Channel 3 selects the Antenna...

Страница 5: ...Figure 1 TS10 Tuning System Block Diagram...

Страница 6: ...Figure 2 Signal Flow Block Diagram...

Страница 7: ...screen AGC The AGC control is located inside the IF Module It is accessed through the hole in the top of the module identified as Delayed AGC Use a plastic hex alignment tool to reach the AGC control...

Страница 8: ...hts Check for blooming in the white areas r or raster edge Readjust RP2 and or RP4 until blooming disappears NOTE If a bar pattern generator is not available the adjustments may be made on a high whit...

Страница 9: ...ture Chart 10 21 Set Does Not Converge Chart 11 21 Pincushion Error Top Bottom And Sides Chart 12 22 NOTE These troubleshooting charts can not be all inclusive They are meant to be a service guide onl...

Страница 10: ...6 6 8VDC TP5 The Deflection Panel Figure 4 uses one socketed IC in the vertical circuit IC3 is the Vertical Ramp Amp which drives hP Vertical Waveform Amp IC4 on the Convergence Pane Should replaced...

Страница 11: ...r TS10P Tuner Interface Panel Lo6 16Vi Ses o n t h e T S 1 0 P Interface Panel Figure 6 are IF Module Controller and Serial Parallel Converter IC1 SW orv I n n n T i n H 9 V 0 t a 9 e S S e e C t i n...

Страница 12: ...Video Sync Audio and RGB Video switching is done by five socketed Bilateral Switch ICs A sixth device not socketed is the Sync Corrector IC6 Malfunctions in the Sync Corrector and other nonsocketed d...

Страница 13: ...R 8 3 Sound Processing Module The Sound Processing Module Figure 10 plugs into the Stereo Power Amp and has one Sound Processing IC socketed This module is serviced by replacing Sound Processing chip...

Страница 14: ...d Module Adjust ment procedures on the Content page Comb Filter Module The Comb Filter is a module which is nonserviceable It has no socketed solid state devices and all controls are factory adjustmen...

Страница 15: ...V I D E O AMP 03 VIDEO AMP 01 CRT DRIVER Q4 CRT DRIVER RP1 CRT DRIVE Figure 14 CRT Drive Panel Horizontal Delay Module The Horizontal Delay module Figure 15 has all nonsocketed solid state devices Ma...

Страница 16: ...C5S R82 Check Tuner Plugs P21 And P22 Use Tuner Plug Charts Sub Tuner Replace Tuner Chart 3 Symplon No Audio Plug Volt Ohm meter Into Tuner Interlace Panel Note 1 Tune To A Live Channel 2 Use A Volt O...

Страница 17: ...Adjust L I Check Horlj Oscillator IC1 Oscillator Coll L I Or Replace Module Remove Jumper From Osc Set Pins Horltontal Oscillator OK Check Horli Osc Module TP1 For Video Signal No Replace Tuner Yes Ch...

Страница 18: ...Voltages Interchange Video Cable At CRT Panels Check Deflection Panel 04 Q3 Power Supply Panel 014 Or Replace Power Supply Panel Check Horlx Oscil lator Module ICt IC4 Or Replace Power Supply Panel A...

Страница 19: ...age Sources TP16 Is 8V TP 8 Is 1SVJ604 2 Is 16V T P U I s BV T P I 9 I 5VJ604 1 Is 16V I Select Crosshair Pattern Place Test Normal Switch In Test Position 3 Tune Set To Live Channel Rotate Red And Bl...

Страница 20: ...ushion Circuits OK Adjust Side Pin cushion Controls RP29 RP30 And RP31 Check IC2 Q7 Q RH3 Rt 19 R95 Or Replace Panel Check Crosshatch For Top Bottom Pincushion Error Top Bottom Pin cushion Correction...

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