Kenwood KVT-627DVDY Service Manual

Also see for KVT-627DVD: Instruction manual Installation manual Installation manual

Contents

35KVT-627DVD/627DVDY/717DVDKVT-737DVD/747DVD/767DVDADJUSTMENT● Adjustment item1. Chroma IC adjustment (X14)(A remote controller is used for adjustment, while confirm-ing on the waveform with an oscilloscope.)2. PLL_CLK/OSD_HSYNC phase adjustment (X14)(A variable resistor is used for adjustment while confirmingon the waveform with an oscilloscope.)3. Freerun adjustment (X35)(A variable resistor is used for adjustment while confirmingon the waveform with an oscilloscope.)4. Flicker adjustment(A remote controller is used for adjustment, while confirm-ing on the waveform with an oscilloscope.)5. Screen position adjustment(A touch panel is used for adjustment, while confirming thescreen.)6. Touch Panel Adjustment(A touch panel is used for adjustment.)1. Chroma IC Adjustment Procedure (X14)1. While pressing on the [ATT] + [SRC] keys on the unit, re-set to enter the Test Mode.2. Press [DIRECT] key on the TV remote controller to get intothe Chroma IC Adjustment mode.→ At this point “CH : 16 VCO_FREERUN VAL 80” is dis-played on upper left corner. (VAL value is displayed in HEX.)3. Perform adjustments in Tables A~M in the order of a~c, oneby one.a. Use [8] and [0] of 10Key to change the setting value. →The values in the VAL on the upper left corner of screen.b. Press [PLAY/PAUSE] key to confirm the setting values.→ When confirmed, the color of “CH : 16 VCO_FREERUNVAL 80” changes.Press [PLAY/PAUSE] key once more to release.c. Use [7] and [9] of 10Key to move to the next setting. →The CH value in the upper left corner of screen changes.4. Press [DIRECT] key to write data to E2PROM.5. Press [DIRECT] key again to move out of Chroma Adjust-ment mode.∗ Conduct this in AUDIO mode using TV/NAVI remote con-troller.Adjustment Item Test Mode Adjustment Method Adjustment Value ConditionDisplay (Temporary)A Chroma VCO CH : 16 Connect TP: HD between R249 and R250 and TP: VD NTSC type Input signalAdjustment between R248 and R251 to GND. Measure TP: TC_HD of 15.734±50Hz : NoneIC237 32 pin with a frequency counter. PAL type Input signal15.625±50Hz : 10 STEP (NTSC)F Y GCA CH : 2 Monitor waveform of 59 pin TP: VG of CN905 with an 2.6V±0.05V 1Vpp V/S ratio(Brightness Gain) oscilloscope and adjust the oscillation width of forward : 7:3 (75Ω terminated)Adjustment rotation-side pedestal and forward rotation-side Step 10. X34 AVIN inputB Brightness CH : 6 Monitor waveform of 59 pin TP: VG of CN905 with an 3.2V±0.05V Oscilloscope rangeAdjustment oscilloscope and adjust the oscillation width of forward : 500mV/DIVrotation-side Step 1 and reverse rotation-side Step 1. ACC Contrast CH : 13 Monitor TP: VG waveform of 59 pin of CN905 with an 3.0V±0.05VAdjustment oscilloscope and adjust the oscillation with of forwardrotation-side Step 8 and reverse rotation-side Step 8.D Black Limiter CH : 5 Maintain and confirm 7F and move on to the next step. 7FAdjustmentE White Limiter CH : 10 Monitor waveform of 59 pin TP: VG of CN905 with an 3.2V±0.05VAdjustment oscilloscope and adjust the oscillation width of forward If lower than 3.2V,rotation-side Step 9 and reverse rotation-side Step 9. finalize with 7F.(However, 2.7Vor less is NG.)www . xiaoyu163. comQQ 376315150 992894298TEL 13942296513 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299