Panasonic CT-27D10B Service Manual

Also see for CT27D10DB - 27" COLOR TV: User guide

Panasonic CT-27D10B Service Manual Manual pdf 10 page image

- 10 -Chassis Service Adjustment ProceduresAll service adjustments are factory preset and should not require adjustment unless controls and/orassociated components are replaced.Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use IC803’s heat sink when the HOT groundsymbol ( ) is used. Otherwise, use COLD ground ( ) — Tuner shield, IC451’s heat sink or FA2.MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (FA1 to FA2 )131.0V B+ Voltage Confirmation1. Set the Bright and the Picture to Minimum byusing the Picture Menu.2. Connect the DVM between C809(+ side) and coldground ( ).3. Confirm that B+ voltage is 131.0V ± 2.5V. Thisvoltage supplies B+ to the Horizontal Output &Flyback circuits.Source Voltage Chart120V AC line input. Set the Bright and the Picture toMinimum by using the Picture Menu. Use cold ground( ) for the (-) lead of the DVM.Adjust Picture Menu for normalized video adjustments.High Voltage Check1. Select an active TV channel and confirm thathorizontal is in sync.2. Adjust Brightness and Picture using Picture Iconmenu so video just disappears.3. Confirm B+ 131V is within limit.4. Using a high voltage meter confirm that the HighVoltage is 28.30kV ± 1.25kV.TUNERIC 551IC 101IC 001IC 002D554IC 803IC451FOCUS SCREENF801HOT ( )COLD ( )FA1DATA TP15CLKFA2IC 552SPRL801TPTUNER IC 2361IC 6501 IC 2302Q 501IC 003Q 551IC 3001Figure 4. A-Board Main ComponentsTPD9TPD8C552LOCATION VOLTAGETPD8 27.4V ± 2VTPD9 13.0V ± 2VC552 (+) side 8.0V ± 1VIC551 Pin3 9.0V ± 0.5VD554 Cathode 220V ± 15VC572 (+) side 5.0V ± 0.25V