— 20 —
TINT adjustment
• Signal contents
Input oscillation level 0.5 Vp-p to VIDEO terminal (CP302).
• Set power supply
VCL0 (CP101) to 5.0
±
0.05V.
Apply 3.3 V
±
5 % to PW.
Input HDB signal by connecting PCB-LB.
(You can use an AC adaptor however, for the checking after repairs, apply above mentioned voltages.)
(1) Adjust VR301 so that the second and third pulses of VB (CP324) signal level will be the same.
Notes: • Perform this adjustment after contrast adjustment.
• Trigger FRP (CP305).
VCL0
QV-770
PCB-LA
(CP324)
VB
3.3 V
PW
(CP302)
(CP101)
S G
Power
suppry
VIDEO
(0.5 Vp-p)
1 2 3 4
oscilloscope
Summary of Contents for QV-770
Page 1: ...R QV 770 APR 1998 without price KX 773...
Page 16: ...14 2 Adjustment of PCB DA Adjustment points of PCB K773 DA...
Page 28: ...26 EXPLODED VIEW 38 35 S3 S3 39 27 32 S3 38 33 38 S3 S2 37 33 34 36 S1 29 40 30 28 31...
Page 35: ...33 PRINTED CIRCUIT BOARDS D board PCB K773A DA...
Page 36: ...34 L board PCB K773A LA...
Page 37: ...35 L board PCB K773A LB CA board PCB K773A CA...
Page 38: ...36 K board PCB K773A KA PCB K773A KB...
Page 39: ...37 SCHEMATIC DIAGRAMS DA CIR K0773AAA...
Page 40: ...38 LA CIR K0773AAA...
Page 41: ...39 LB CIR ZK0773AAA...
Page 42: ...40 KX CIR ZK0773AAA...
Page 43: ...41 KA CIR K0773AAA...
Page 44: ...42 KB CIR K0773AAA...