Panasonic CT-27D10B Service Manual

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

Panasonic CT-27D10B Service Manual Manual pdf 14 page image

- 14 -Serviceman Mode (Electronic Controls)This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and itreplaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the controlfunctions are now performed by using “On Screen Display Menu”. (The Serviceman Adjustment Mode.)Note: It is suggested that the technician reads all the way through and understand the following procedure forEntering/Exiting the Serviceman Adjustment Mode; then proceed with the instructions working with theReceiver. When becoming familiar with the procedure, the Flow Chart for Serviceman Mode may be usedas a quick guide.Quick Entry to Serviceman Mode:At times when minor adjustments need to be done to the electronic controls, the method of Entering theserviceman Mode without removal of the cabinet back is as follows using the Remote Control:1. Select SET-UP icon and select CABLE mode.2. Select TIMER icon and set SLEEP time for 30 Min.3. Press ACTION button 3 times to exit menus.4. Tune to the Channel 124.5. Adjust VOLUME to minimum (0).6. Press the VOL button (decrease) on Receiver. Red “CHK” appears in upper corner.7. Press the Power Button on the Remote Control to select one of seven Serviceman Adjustment Modes.1) B= Serviceman VCJ SUB-DATA ADJUSTEMENT.2) C= Serviceman VCJ CUT-OFF ADJUSTMENT.3) D= Serviceman PIN CUSHION ADJUSTMENT.4) M= Serviceman MTS ADJUSTMENTS.5) P= Serviceman PIP ADJUSTMENT. (Models with PIP only)6) S= Serviceman OPTIONS ADJUSTMENTS.7) X = Serviceman COMB FILTER ADJUSTMENT.8) “CHK” = Normal operation of CHANNEL and VOLUME .Exiting the Serviceman Mode:Press the Action and the Power buttons on the Receiver simultaneously for at least 2 seconds.THE RECEIVER EXITS SERVICEMAN MODE.The Receiver momentarily shuts off; then comes back on tuned to channel 3 with a preset level of sound.Any programmed channels, channels caption data and some others user defined settings will be erased.To toggle between Aging and Serviceman modes:While the “CHK” is displayed on the left top corner of the CRT, pressing the Action and the Volume Up buttonson the Receiver simultaneously will toggle between the modes. Red “CHK” for Serviceman and yellow “CHK” forAging.An address Menu appears in the righthand corner of the screen32 B 0 2 215 C 0b a b aNote: Only the applicable settings forthe Receiver serviced will beavailable (See a in Fig. 14).Figure 14. Serviceman Mode Menu Adjustments.IMPORTANT NOTE:Always Exit the Serviceman ModeFollowing Adjustments.