Circuit Adjustments; Tv Input Sub Contrast Adjustment (Mcd1 Scon); Video Input Sub-Contrast Adjustment (Mcd3-Scon); P & P Sub-Contrast Adjustment (Mcd2-Scon) - Sony KP-53XBR300 Service Manual

[ MCD MODE]
5-1. TV INPUT SUB CONTRAST ADJUSTMENT
(MCD1-SCON)
1. Receive the color-bar signal.
2. Set to service mode.
3. Connect an oscilloscope between pin 2 of CN511 (A board)
and ground.
4. Select " MCD1-SCON ", and adjust so that the waveform
level is 0.525 ± 0.015Vp-p.
5. Write the data into memory.
MUTING n ENTER
Fig. 5-1
5-2. VIDEO INPUT SUB CONTRAST ADJUSTMENT
(MCD3-SCON)
1. VIDEO 1 input the color-bar signal.
2. Set to service mode.
3. Connect an oscilloscope between pin 2 of CN511 (A board)
and ground.
4. Select " MCD3-SCON ", and adjust so that the waveform
level is 0.525 ± 0.015Vp-p.
5. Write the data into memory.
MUTING n ENTER
Fig. 5-2
SECTION 5

CIRCUIT ADJUSTMENTS

White
±
0.525 0.015Vp-p
Pedestal
White
±
0.525 0.015Vp-p
Pedestal
5-3. P & P SUB CONTRAST ADJUSTMENT
(MCD2-SCON)
1. Receive the signal.
TV terminal (main)
VIDEO terminal (sub) : no signal
2. Set to P & P mode, set to service mode.
3. Connect an oscilloscope between pin @º of CN513 (A board)
and ground.
4. Select " MCD2-SCON ", and adjust so that the waveform
level is 0.525 ± 0.015Vp-p.
5. Write the data into memory.
MUTING n ENTER
5-4. P & P SUB CONTRAST ADJUSTMENT
(MCD4-SCON)
1. Receive the signal.
TV terminal (sub)
VIDEO terminal (main) : color-bar signal
2. Set to P & P mode, and set to service mode.
3. Connect an oscilloscope between pin @º of CN513 (A board)
and ground.
4. Select " MCD4-SCON ", and adjust so that the waveform
level is 0.525 ± 0.015Vp-p.
5. Write the data into memory.
MUTING n ENTER
– 55 –
KP-53XBR300/61XBR300
RM-Y902
: color-bar signal
White
±
0.525 0.015Vp-p
Pedestal
Fig. 5-3
: no signal
White
±
0.525 0.015Vp-p
Pedestal
Fig. 5-4
RM-Y902