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FEATURES

2000 display characters in a 8 x 8 dot format.

18 MHz bandwidth, medium class, composite signal input.

This monitor is compatible with a variety of home and personal computers

CONTROLS LOCATION

The 

 monochrome monitor uses a RCA jack connector.

The input signal is input through the RCA jack connector.
The input signal is based on the composite level.

Figure 2 shows the monitor controls on the front and rear panels.

   

  I n d i c a t o r

H-Size

Video In

Contrast

B r i g h t n e s s   P o w e r

H - P o s i t i o n   H - H o l d   V - S u e   P o w e r   C o r d

Figure 2, Monitor 

Controls

NOTE: Monitor cabinet not used on 6300T Models.

 POWER (PUSH-ON)

Turn on the monitor by pressing the power switch.
The power indicator lights when the power is ON.

Always turn on the monitor before you turn on the
computer.

To turn the power OFF, just press this switch again.

 Brightness

Turn this knob clockwise to increase brightness.

 Contrast

Turn this knob 

 

to increase contrast.

 

Turn this knob to adjust the vertical size of the

picture.

 H-Hold

Turn this knob to stop horizontal rolling of the

picture.

 H-Position

Turn this knob clockwise to move the center of the

picture to the right; turn the knob counterclockwise
to move the center of the picture to the left.

 

Turn this knob to adjust the horizontal size of the

picture.

Summary of Contents for MBM-2105A

Page 1: ...GolclStar MONOCHROME MONITOR SERVICE MANUAL WTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PREtXJTK NS IN THIS MANUAL MODEL MBM 2105GIA MC 3 CHA W B GoldStar ...

Page 2: ...or Controls NOTE Monitor cabinet not used on 6300T Models 0 POWER PUSH ON Turn on the monitor by pressing the power switch The power indicator lights when the power is ON Always turn on the monitor before you turn on the computer To turn the power OFF just press this switch again 0 Brightness Turn this knob clockwise to increase brightness 0 Contrast Turn this knob clockvvise to increase contrast ...

Page 3: ...lied to the primary of the T901 where it is stepped down through the secondary winding to approximately 17V AC After passing through the bridge rectifier circuit and filter C905 the regulated DC supply voltage is approximately 18V DC The 18V unregulated B voltage is applied directly to the collector of the B regulator TR901 A voltage divider network R905 VR901 R906 in which the B adjustment contro...

Page 4: ...r is cut off Voltage lower than 1 6V enables the transistor to conduct and the internal circuitry is enabled for synchronization function 3 4 LINE H OSCILLATOR PIN 9 The line oscillator is of the type which charges and discharges a capacitor since a perfectly linear sawtooth wave form is not required The free running frequency is dependent on C705 R705 and VR702 and is governed by this expres sion...

Page 5: ...1 The horizontal position control VH701 snould be adjusted for the horizontal picture position 6 SUB BRIGHT VR703 Adjust subbright control VR703 for visual cut off of the raster when external brightness is turned to maximum 7 CENTERING ADJUSTMENT It the raster is not centered horizontally and verti cally it may be centered by removing the cabinet back and adjusting the centering tabs on the neck o...

Page 6: ... 1 RESISTORS ARE SHOWN IN OHMS K 1 000 M 1 000 000 2 CAPACITORS ARE SHOWN IN UF OTHERWISE NOTED P cc Ir 3 All RESISTORS ARE f 5 TOLERANCE UNLESS OTHERWISE NOTED u u 4 ItlPORTANT SAFETY NOTICE b T H E SYMBOL MA RK OF THIS SCHEHATIC D I A G R A M INCOI FEATURES IMPORTANT FOR PROTECTION FROM X RADIA ELECTRICAL SHOCK HAZARDS WHEN SERVICING IT IS ONLY MANUFACTURER S SPECIFIED PARTS BE USED F COl lPONEN...

Page 7: ...5 5 c7l5 rl JE u3wl 0 0 1 A lK Lltw 6 3 lb RIM 711 BOOST UP1 I Ln 3Vr r IHI 2oovp IH 4 IMPORTANT AVIS SUR LA SkURlTi b TES SPECIAL FIRE AND IllAL T H A T iE CRITICAL LA m SYMBOLE MARQUE DE CE DIAGRAMME SCHEIIATIQUE COMPREND DIIIPORTANTES CARACTkRISTIQUES SPkIALES CON UES P O U R PROTiGER D E S R A Y O N S X ET DES D A N G E R S D NCENDIE E T D E SECOUSSES ELE TRIQUES E N cAs D E BEsolN 51 D E S PI...

Page 8: ... L T A G E A B O V E 55V TROUBLE IN 45 55v T R 3 0 3 TR304 R311 R309 R310 R315 R314 R312 Y E S VR703 SUB BRIGHT R710 R711 R301 CONTRAST VI 05 MT B R I G H T TRW TR302 V I D E O C A B L E HORIZONTAWERTICAL SYNC TROUBLE I S Y N C T R O U B L E TROUBLE IN R719 C716 R70B R720 I I REF NO FIGURE OEBCRIPTION TR301 TR302 B w K T C 015 TR902 KTC 1959 TR903 C K T A 562TM TR601 K T C 1815 L TR304 k KTC 2229 ...

Page 9: ...PRINTED CIRCUIT BOARD 1 MAIN PCB ASSY PIN 1 lo BOW ASSY PIN ilO B72A J GSEP 2112 TI BLACK ...

Page 10: ...3 MAIN PCB SOLDER SIDE 4 LINE FILTER PCB SOLDER SIDE O 0 Lsol I ...

Page 11: ... LIST MECHANICAL PARTS 8 1ILr I w 9 1 3X3 A02A 1 COVER ASSY B ___ 10 407 622A 11 407 696A I LAIE x t WNR ruvvcn 12 303 924A 1 COVER C R T BOARD I 13 303 928A COVER PCB SHIELD CASE 1 Outer Cabinet not used on 6300T Models C D I E I F ...

Page 12: ...m RD 118W 18 ohm RD l SW 150K ohm RD 118W 390K ohm R D 1 8W 82K o h m RD 118W 2 2 ohm RD 118W 1 OK ohm RD 118W 82 ohm RD 118W 6 8K ohm RD 118W 150 ohm RD 118W 150 ohm RD ll8W 560K ohm RD 118W 3 9K ohm RD 118W 47K ohm R D 118W 3 3 K o h m 20 o RD 118W 470 ohm RD 118W 33 ohm RD 112W 6 8K ohm R R R R R R R R R R R R R R R R R R R R R R R R R R R R R A R R R R R R R R R R R R REF NO PART NO DESCRIPTIO...

Page 13: ... S D 7 0 5 1g 0049 RGPlOD S A D706 19 0048 RGPlOM S A D901 1g 0047 1N5392GP S A 0902 1 N5392GP S A D903 1N5392GP S A 0904 1N5392GP S A D905 ZENER BZX83 C6V2 S P902 LED GREEN S TRANSISTOR TR301 19 0046 KTC 1959 Y S T R 3 0 2 1g 0045 KTA562 TM Y S T R 3 0 3 2N3904 S TR304 1 g 0044 KTC2229 Y S TR601 KTC2240 GR S A TR701 BU806 S COIL L301 20 0040 PEAKING PL 4 7uH S L302 20 0039 PEAKING PL 3 3uH S L701...

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