JBL 6810, Field Service Manual

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...