SANYO CP21Y2 _ SERVICE MODE_MEMORY REPLACEMENT _ ADJUSTMENTS _ GRAY-SCALE ADJUSTMENT

ENTERING INTO SERVICE MODE

• Press and hold the MENU button on the Remote Control and press the VOLUME (+) button on the TV set.
• Select item by pressing the TIMER (Item No. UP) or SOUND MUTE (Item No. DOWN) button on the remote control handset.
• Adjust data value by pressing the VOLUME + or VOLUME - button on the remote control handset.

To return to normal TV mode, press the MENU button on the TV set or the remote control handset.

MEMORY REPLACEMENT _ ADJUSTMENTS

The CPU (IC201) and memory IC (IC801) store the service adjustments data and controls data for each circuit.When the Memory IC(IC801) is replaced, some of the service adjustments should be readjusted to obtain the best performance. The necessary service adjustments are carried out by using the RC handset.

 INITIALIZATION PROCEDURE

1. Put a new memory IC.
2. Turn on the TV set.
3. Press and hold the TV/AV Selector on the TV set for more than 2 seconds. The following picture appears on the screen.
4. Press the PROGRAMME UP on the TV set while the above On-Screen Display is still on the screen.
5. Switch off the TV set by pressing the Power Switch button on the TV set while the above On-Screen Display is still on the screen.  This completes the initialization of memory IC.

Following shows the initialized contents of memory data by this procedure

Plug & play Inhibit data Ch skip data Sound volume data Volume Lock Colour system

No executed Cancelled Cancelled 10/63 steps OFF AUTO

REQUIRED SERVICE ADJUSTMENTS

GRAY-SCALE ADJUSTMENT

1. Receive a monochrome circular pattern.
2. Set the brightness and colour to normal, contrast to maximum.
3. Enter to the service mode.
4. Select No. 30 RBIAS (Red Bias), No, 31 GBIAS (Green Bias), and No. 32 BBIAS (Blue Bias) and set each data to 0 by pressing the VOLUME + or - key.
5. Select No. 33 RDRIV (Red Drive) and No. 35 BDRIV (Blue Drive) and set each data to 64 by pressing the VOLUME + or - key.
6. Turn Screen Control on the FBT (T471) to minimum (fully counter-clock-wise).
7. Select No. 36 (1-line appear).
8. Advance Screen Control clockwise to obtain just visible one colour line. If line does not appear, place this control to maximum (fully clockwise).
9. Raise each Bias Level with 1, 2, 5, 6, 9 and 0 keys to obtain just visible white line.Select No. 37 DRV (Drive Adjustments).
10. Adjust Red and Blue Drive Levels alternately with 3, 4, -/-- or RECALL key to produce normal black and white picture in highlight areas.
11. Check for proper grayscale at all brightness levels. To turn off the TV Service Menu display, press the MENU key.

Readjust the following service adjustments

ADJUSTMENTS RF AGC Horizontal center Vertical Position Vertical linearity Vertical-S correction Gray scale

VICE MODE NO. & ITEM Item 01, RF AGC Item 02, H-PHA Item 04, V-SHIFT Item 06, V-LIN Item 07, V-SCO Item 30-33, 35-37