Rolsen C21R21, C2121, C2190, C21R90 Service manual

SERVICE MANUAL

4.3 Receive a normal TV signal. Rotate knob of the FCB until you get a sharp picture.

5. Safety Inspection

5.1 Inspection for insulation and voltage-resistant

Perform safety test for all naked metal of the TV. Supply high voltage of 3000V AC, 50Hz (limit

current of 10mA) between all naked metal and cold ground. Test every point for 3 min. and ensure

no arcing and sparking.

5.2 Requirements for insulation resistance

Measure resistance between naked metal of the TV and feed end of the power cord to be infinity

with a DC-500 high resistance meter and insulation resistance between the naked metal and
degaussing coil to be over 20MΩ.

6. DESIGN/SERVICE mode

6.1 To enter the USER SERVICE mode

Caution: The user service mode adjustment can be changed only when service personnel adjust

the whole set data during servicing. As the control data have dramatic effects on functions and

performance of the TV, service personnel should not tell user how to

enter the SERVICE mode to avoid improper data settings.

6.1.1 Set the volume to 0. Then press and hold the MUTE button on

the remote control, and press the MENU button on the TV to

S

VS 0-3F 25

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enter the SERVICE mode. (In this case, the S mode cannot be

stored in the EEPROM. To exit from the S mode, turn off the TV set. )

6.1.2 After entering the S mode, Red “S”is displayed on the upper center of the screen and MENU1

is default. Use the POS+/- buttons to highlight an adjustment and the VOL+/- buttons to adjust

it. The adjusted data are immediately output and stored in the EEPROM

6.2 Bus data in the S mode

Item Bus Data Description Remarks

5PAR/6PAR 1F Parallelogram correction (for large-screen only)

5BOW/6BOW 1F Curve correction (for large-screen only)

5HSH/6HSH Set to the optimal

mode

5HSR/6HSR Set to the optimal

mode

5EWP/6EWP 1F East-West parabola correction (for large-screen only)

5EWW/6EWW 1F East-West correction (for large-screen only)

5UCR/6UCR 1F Upper corner parabola correction (for large-screen only)

5LCR/6LCR 1F Lower corner parabola correction (for large-screen only)

5EWT/6EWT 1F Trapezoidal correction (for large-screen only)

Horizontal center in the TV mode for 50Hz/60Hz
For 50Hz, “5HSH” is displayed；for 60Hz, “6HSH” is

displayed.

Horizontal center in the RGB mode for 50Hz/60Hz
For 50Hz, “5HSR” is displayed；for 60Hz, “6HSR” is

displayed.

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SERVICE MANUAL

5VSL/6VSL 1F Vertical slope (for large-screen only) *

5VAM/6VAM 1F

5SCL/6SCL Set to the optimal

mode

5VSH/6VSH Set to the optimal

mode

5VOF/6VOF Set to the optimal

mode

VX 19 Vertical zoom (for large-screen only)

RED 20 Red gun cutoff voltage *

GRN 20 Green gun cutoff voltage *

WPR 1F Red gun drive voltage *

WPG 1F Green gun drive voltage *

WPB 1F Blue gun drive voltage *

YDFP 07 PAL brightness delay time

YDFN 07 NTSC brightness delay time

YDFS 0F SECAM brightness delay time

YDAV 0F AV brightness delay time

TOP 18 UOC AGC *

VOL 21 UOC audio output amplitude *

IFFS

HDOL 00 Cathode drive level

AGC 03 IF ACG speed

VG2B 3A VG2 brightness *

SBRI 1F Sub brightness

MBRI 39 Max. brightness

SCON 20 Sub contrast

MCON 3F Max. contrast

SCOL 32 Sub color

OP1 BF Option set byte 1

OP2 01 Option set byte 2

OP3 09 Option set byte 3

OP4 F6 Option set byte 4

OP5 76 Option set byte 5

OP6 3D Option set byte 6

INIT EEPROM initialization

VG2 Adjusting screen voltage with VG2

VSD Vertical output off

USER_LOGO User logo write-in (valid when OP-USER-LOGO is 1)

STS0/1/2 System status byte

03（02）

Vertical amplitude; For 50Hz, “5VAM” is displayed；for
60Hz, “6VAM” is displayed.

S correction *

Vertical center *

OSD vertical center *

PIF (02-38.9MHz, 03-38MHz)

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