Panasonic CT-25G6E Service Manual

Also see for CT27G6DE - 27" COLOR TV: Operating instructions Service manual

Panasonic CT-25G6E Service Manual Manual pdf 2 page image

- 14 -Service Mode (Electronic Controls)This Receiver has electronic technology using the I²CBus Concept. It performs as a control function and itreplaces many mechanical controls. Instead ofadjusting mechanical controls individually, many of thecontrol functions are now performed by using “OnScreen Display Menu”. (The Service AdjustmentMode.)Note: It is suggested that the technician reads all theway through and understand the followingprocedure for Entering/Exiting the ServiceAdjustment Mode; then proceed with theinstructions working with the Receiver. Whenbecoming familiar with the procedure, the FlowChart for Service Mode may be used as aquick guide.Quick Entry to Service Mode:At times when minor adjustments need to be done tothe electronic controls, the method of Entering theservice Mode without removal of the cabinet back is asfollows using the Remote Control:1. Adjust VOLUME to minimum (0).2. Set CC Mode (Close Caption) OFF.3. Select SET-UP icon and select CABLE mode.4. Select TIMER icon and set SLEEP time for 30, 60or 90 Min.5. Press ACTION button twice to exit menus.6. Tune to the Channel 124.7. Press the VOL button (decrease) on Receiver.Red “CHK” appears in the left upper corner.Note: Three additional indicators appear on screen.One is the five digit usage in hours and theother two are four digits for V-Chip Main andChild ratings. Indicators are hexadecimalnumbers.8. Press the Power Button on the Remote Control toselect one of seven Service Adjustment Modes.1. B= Service VCJ SUB-DATA adjustments.2. C= Service VCJ CUT-OFF adjustments.3. M= Service MTS adjustments.4. P= Service VCJ adjustments.5. S= Service OPTIONS (PICTURE) adjustments.6. X = Service AFC adjustments.7. “CHK” = Normal operation of CHANNEL andVOLUME .Figure 14. Service Mode Menu Adjustments.Note: Only the applicable settings for the Receiverserviced will be available (See a in Fig. 14).Exiting the Service Mode:Press the Action and the Power buttons on theReceiver simultaneously for at least 2 seconds.THE RECEIVER EXITS SERVICE MODEThe Receiver momentarily shuts off; then comes backon tuned to channel 3 with a preset level of sound.Any programmed channels, channels caption data andsome others user defined settings will be erased.To toggle between Aging and Servicemodes:While the “CHK” is displayed on the left top corner ofthe CRT, pressing the Action and the Volume Upbuttons on the Receiver simultaneously will togglebetween the modes. Red “CHK” for Service andyellow “CHK” for Aging.An address Menu appears in the righthand corner of the screenB 00 33b a b aC 00 0 255IMPORTANTAlways Exit the Service ModeFollowing Adjustments.