Goldstar CDU 1435SE/GS11 Pocket Service Manual

14" colour display unit

Advertisement

Quick Links

14" COLOUR DISPLAY UNIT - CDU
This unit is manufactured by GOLDSTAR and bears the marking CDU 1435S/GS11 on the rear
and DSM 27-039 on the Progetto di Gestione.
It can display 5 different vertical resolution: 350, 400, 480 lines (VGA standard mode); 600 lines
(Super VGA mode) and 768 lines (1024 x 768 interlaced mode). Vertical scan frequency varies
from 56 to 87 Hz. (Interlacing frequency).
The horizontal scan frequency may be of: 31.5 KHz (VGA standard mode); 35.2 KHz (Super VGA
mode) or 35.5 KHz (1024 x 768 interlaced mode).
CHARACTERISTICS
Ergonomic, high resolution, VGA-compatible, analog video.
Screen dimensions:
Horizontal dimension:
Vertical dimension:
Input voltage:
Mains frequency:
Degauss:
Horizontal Synchronism:
Frequency:
Polarity:
Level:
Pull-in range:
Hold-in range:
Retrace period:
Vertical Synchronism:
Frequency:
Polarity:
Level:
Pull-in range:
Hold-in range:
Retrace period:
Input signals:
Video:
Signal:
Level:
Polarity:
Resolutions displayed:
External Controls:
14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11
1435SE/GS11
14"
240 mm ± 6 mm
180 mm ± 3 mm
110 V: 98 - 132 Vac for CDU 1435SE/GS11 - 110 V
220 V: 198 - 264 Vac for CDU 1435SE/GS11 - 220 V
50 ± 3 Hz - 60 ± 3 Hz
On powering up
31.5 - 35.2 - 35.5 KHz
Negative or positive
TTL
more than ± 250 Hz
more than ± 350 Hz
5.0 µs max.
56 - 60 - 70 - 87 (Interlaced) Hz
Negative or positive
TTL
50 - 87 Hz
50 - 87 Hz
< 800 µs
R, G, B (Red, Green, Blue) driving
Linear voltage steps (63 steps of 11 mV)
0 - 700 mV
Positive
640 x 350 rows x columns ( VGA standard mode)
640 x 400 rows x columns (VGA standard mode)
640 x 480 rows x columns (VGA standard mode)
800 x 600 rows x columns (Super VGA mode)
1024 x 768 rows x columns (1024 x 768 int. mode)
Brightness - Contrast
Horizontal size - Vertical size
Horizontal phase - Vertical center
Video Unit - Pocket Service Guide
20
20-1

Advertisement

Table of Contents
loading

Summary of Contents for Goldstar CDU 1435SE/GS11

  • Page 1 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11 This unit is manufactured by GOLDSTAR and bears the marking CDU 1435S/GS11 on the rear and DSM 27-039 on the Progetto di Gestione. It can display 5 different vertical resolution: 350, 400, 480 lines (VGA standard mode); 600 lines (Super VGA mode) and 768 lines (1024 x 768 interlaced mode).
  • Page 2: Removing The Cover

    CRT anode. Hold the screwdriver in contact with the anode for a few seconds until the high voltage is fully discharged. Fig. 20-2 Discharching the High Voltage 20-2 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11...
  • Page 3 CRT connector on the video board. Desolder the connection. 10. Disconnect the G2 grid cable. 11. The video board is now free of all connection. Fig. 20-4 Video Amplifier Board 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11 20-3...
  • Page 4: Removing The Mainboard

    16. Press catches and raise the board from side A. 17. Dis co nn ec t d efle ctio n y ok e a nd potentiometers P connectors, than press catch B and remove board. Fig. 20-6 Removing the main board 20-4 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11...
  • Page 5: Removing The Crt

    20. Remove the 4 screws V securing the CRT to the front casing of the monitor, and release it from the casing. 21. Remove the CRT aquadag D, after releasing the spring keeping it taut. Fig. 20-8 Removing the CRT 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11 20-5...
  • Page 6 Video amplifier board VR301 Blue cut-off VR302 Green cut-off VR301 VR302 Fig. 20-9 Video Amplifier Board Adjustments 20-6 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11...
  • Page 7 Horizontal center adjustment VR706 Brightness adjustment (external access) VR710 Side pincushion adjustment VR706 VR704 VR708 VR501 VR701 VR502 VR602 VR603 VR707 VR703 VR202 VR710 VR601 VR705 VR201 VR702 Fig. 20-10 Main Board Adjustments 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11 20-7...
  • Page 8: Main Board Adjustments

    Set the external V-SIZE VR602 (external VR) at VR601 VR602 Center Position. Fig. 20-12 Vertical Lineariry and • Adjust the V-SIZE VR602 and then the vertical Vertical Size Adjustment size should be within 180 ± 2 mm. 180mm 20-8 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11...
  • Page 9: Side Pincushion Adjustment

    90 x 90, on the monitor. • At the center of the screen, adjust the Sub-Contrast VR (VR703), so that the brightness should be ≥ 95 NIT. VR703 Fig. 20-15 Contrast Adjustment 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11 20-9...
  • Page 10: Focus Adjustment

    Set the bright VR at the center and the contrast VR at Max. • Adjust Focus VR, on T702 transformer, so that the focus should be best condition T702 Fig. 20-16 Focus Adjustment 20-10 14" COLOUR DISPLAY UNIT - CDU 1435SE/GS11...

Table of Contents