JVC KD-AVX1 service manual Chroma, Monitor adjustment

4.6.9 Monitor adjustment

When adjusting, switch on the main unit and insert a test disc (VT-501). And play the test disc and pause it. (Exit for VCO FREE-RUN adjustment)

R/W CHROMA 1

1.Set the service mode 4.

2.Exchanging it operate a menu of a service mode with the [UP] button and [DOWN] button.

3.Change data with the [B.SKIP]/[F.SKIP] buttons.

4.Write data with a [OK] button.

When performing the VCO FREE-RUN N adjustment, set the NTSC mode (Service mode 3Service mode DVD NTSC/PAL) and turn the input into the no input. Connect the frequency counter to the point (TP661 or TP681-GND) on the panel board and set the frequency into 15.62 0.01 (kHz).

When performing the VCO FREE-RUN P adjustment, set the PAL mode (Service mode 3Service mode DVD NTSC/PAL) and turn the input into the no input. Connect the frequency counter to the point (TP661 or TP681-GND) on the panel board and set the frequency into 15.73 0.01 (kHz).

Indication	Minimum value	Maximum value	Initial value	Production jig initial value	Reference register value
COM AMPLITUDE	0x00	0xFF	0x80	0x80	0x80	Fix
BRIGHT GAIN	0x00	0xFF	0x80	0x80	0x80	Fix
COLOR GAIN N	0x00	0xFF	0x80	0x5F	0x60	Adjust
COLOR GAIN P	0x00	0xFF	0x80	0x62	0x62	Adjust
TINT N	0x00	0xFF	0x80	0x82	0x6D	Adjust
TINT P	0x00	0xFF	0x80	0x80	0x80	Adjust
BLACK LIMITER	0x00	0x7F	0x40	0x5E	0x5E	Fix
BRIGHT	0x00	0xFF	0x80	0xA3	0xA3	Adjust
APERTURE	0x00	0x7F	0x40	0x40	0x40	Fix
R SUB BRIGHT	0x00	0xFF	0x80	0x88	0x88	Adjust
B SUB BRIGHT	0x00	0xFF	0x80	0x88	0x89	Adjust
W PEAK LIMITER	0x00	0x7F	0x40	0x7F	0x7F	Fix
GAMMA1	0x00	0xFF	0x80	0x80	0x80	Fix
GAMMA2	0x00	0xFF	0x80	0xFF	0xFF	Fix
CONTRAST	0x00	0xFF	0x80	0x64	0x65	Adjust
R SUB CONTRAST	0x00	0xFF	0x80	0x74	0x71	Adjust
B SUB CONTRAST	0x00	0xFF	0x80	0x78	0x74	Adjust
VCO FREE RUN N	0x00	0xFF	0x80	0x8C	0x8F	Adjust	15.62 kHz
VCO FREE RUN P	0x00	0xFF	0x80	0x89	0x8B	Adjust	15.73 kHz
PLL STOP POS	0x00	0x0F	0x00	0x08	0x08	Fix
V POSITION	0x00	0x07	0x00	0x02	0x02	Fix
H POSITION	0x00	0x1F	0x00	0x1F	0x1F	Fix
PWM FREQUENCY	0x00	0x0F	0x08	0x08	0x08	Fix
BRST CLN PLS POS	0x00	0x07	0x00	0x03	0x03	Fix
PWM DUTY	0x00	0xFF	0x80	0xFF	0xFF	Fix
COM DC	0x00	0xFF	0x80	0x80	0x80	Fix
DC OUTPUT	0x00	0xFF	0x80	0x65	0x43	Adjust

R/W CHROMA 2

1.Set the service mode 4.

2.Exchanging it operate a menu of a service mode with the [UP] button and [DOWN] button.

3.Change data with the [B.SKIP]/[F.SKIP] buttons.

4.Write data with a [OK] button.

Indication	Minimum value	Maximum value	Initial value	Production jig initial value	Reference register value
H POSITION	0x00	0x1F	0x10	0x12	0x13	Adjust
V POSITION	0x00	0x0F	0x08	0x08	0x08	Adjust
HDO POSITION	0x00	0x1F	0x00	0x02	0x02	Fix
BRIGHT	0x00	0x7F	0x40	0x4D	0x4E	Adjust
R BRIGHT	0x00	0x7F	0x40	0x3E	0x3E	Adjust
B BRIGHT	0x00	0x7F	0x40	0x40	0x41	Adjust
COMLEVEL M	0x00	0x1F	0x10	0x09	0x08	Adjust
COMLEVEL E	0x00	0x1F	0x10	0x10	0x10	Fix
COMDC M	0x00	0x3F	0x29	0x33	0x31	Adjust
COMDC E	0x00	0x3F	0x32	0x32	0x32	Fix
VCO N	0x00	0xFF	0x80	0x70	0x61	Adjust
VCO P	0x00	0xFF	0x80	0x76	0x69	Adjust

(No.MA165)1-37