Dell D1626HT - UltraScan 1600HS - 21" CRT Display Service Manual
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Dell D1626HT - UltraScan 1600HS - 21" CRT Display Service Manual

Service manual
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SERVICE MANUAL

Picture tube
Phosphor Type
Transmission Ratio
Faceplate
Viewable image size
Resolution
Horizontal
Vertical
Display picture size
Input signal
Video
Sync
0.25 - 0.27 mm aperture grill pitch,
21 inches measured diagonally,
90 degree deflection
P22
Approx. 39%
Anti Reflective (AR)/Anti Static (AS)
coating
Approx. 403.8
302.2 mm (w/h)
(16
12 in.) 19.8" viewing image
Max. 1600 dots
Max. 1200 lines
Approx. 388
291 mm (w/h)
(15
3
/
11
1
/
in.)
8
2
or
Approx. 364
291 mm (w/h)
3
1
(14
/
11
/
in.)
8
2
Analog RGB (75
typical)
0.7 Vp-p, Positive
External HD/VD, Composite
Polarity Free TTL
Video Composite (Sync on green)
0.3 Vp-p, Negative
SPECIFICATIONS
Deflection frequency
Horizontal
Vertical
AC input voltage/current
Inrush current
Power consumption
Maximum
Nominal
Dimensions
Net weight
Shipping weight
Environmental Temperature
Operating
Non-operating
Environmental Humidity
Operating
Non-operating
Design and specifications are subject to change without notice.
D1626HT
US Model
Canadian Model
AEP Model
EQ Model
SH Model
J Model
Chassis No. SCC-L04K-A
N3
CHASSIS
30 to 107 kHz
48 to 160 Hz
100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A
120 VAC/50 A
240 VAC/80 A
160 W
120 W, 409 BTU/h
498
505
474 mm (w/h/d)
5
3
(19
/
20
18
/
in.)
8
4
Approx. 31 kg (68 lb 5 oz)
37 kg (81 lb 9 oz)
10˚ to 40˚ C (50˚ to 104˚ F)
0˚ to 60˚ C (32˚ to 140˚ F)
10% to 80% (Non-condensing)
5% to 90% (Non-condensing)

COLOR MONITOR

R

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Summary of Contents for Dell D1626HT - UltraScan 1600HS - 21" CRT Display

  • Page 1: Service Manual

    D1626HT SERVICE MANUAL US Model Canadian Model AEP Model EQ Model SH Model J Model Chassis No. SCC-L04K-A CHASSIS SPECIFICATIONS Picture tube 0.25 - 0.27 mm aperture grill pitch, Deflection frequency 21 inches measured diagonally, Horizontal 30 to 107 kHz 90 degree deflection Vertical 48 to 160 Hz...
  • Page 2 D1626HT SAFETY CHECK-OUT (US Model only) After correcting the original service problem, perform the fol- LEAKAGE TEST lowing safety checks before releasing the set to the customer: The AC leakage from any exposed metal part to earth ground 1. Check the area of your repair for unsoldered or poorly-sol- and from all exposed metal parts to any exposed metal part dered connections.

  • Page 3: Power Saving Function

    POWER SAVING FUNCTION This monitor has three Power Saving modes. By sensing the absence of a Note video signal from the computer, it reduces power consumption as follows. If no video signal is input to the monitor, the “NO INPUT SIGNAL” message appears (page 13).

  • Page 4: Table Of Contents

    TABLE OF CONTENTS Section Title Page 1. GENERAL ..............2. DISASSEMBLY 2-1. Cabinet Removal ..........13 2-2. D Board Removal ..........13 2-3. G Board Removal ..........14 2-4. A Board Removal ..........14 2-5. L Board Removal ..........15 2-6.

  • Page 5: Parts And Controls

    Parts and Controls Front Rear 5 > (CONTRAST) ?// buttons (page 6) (RESET) button (pages 7 and 11) Resets the adjustments to the factory settings. Adjust the contrast. Operate as the ?// buttons when adjusting other items. (AUTO SIZING AND CENTERING) button 6 u (POWER) switch and indicator (page 12) (page 6) Automatically adjusts the size and centering of the...

  • Page 6: Input Signal Selection

    Customizing Your Monitor Input Signal Selection Adjusting the Picture Brightness and Contrast This monitor has two signal input terminals (HD15 and 5 BNC) and can be connected to two computers. When the Press the ¨ (BRIGHTNESS) ./> or power of both computers is on, manually select the input signal >...
  • Page 7 Getting Started Customizing Your Monitor The OSD (On-screen Display) System Introducing the OSD System You can adjust most of the monitor’s settings using the OSDs (On-screen Display). All of the OSDs numbered in this illustration are described on the following pages in order. You can access any of these OSDs from the MENU OSD.

  • Page 8: Adjusting The Settings

    Customizing Your Monitor 3 Using the SCREEN OSD Adjusting the Settings You can adjust the convergence and landing of the picture and cancel the picture’s moire using the SCREEN OSD. 1 Using the COLOR OSD Convergence is the alignment of the Red, Green and Blue electron beams on the screen.
  • Page 9 Customizing Your Monitor Getting Started 5 Using the OPTION OSD 4 Using the ZOOM OSD You can manually degauss (demagnetize) the CRT, select the You can enlarge or reduce the picture size using the ZOOM input signal, move the OSD position, set the Power Saving OSD.
  • Page 10 Customizing Your Monitor 6 Using the SIZE OSD 7 Using the LANGUAGE OSD You can adjust the picture size using the SIZE OSD. You can set the OSD language to English, German, French, This setting is stored in memory for the current input signal. Spanish, Italian or Japanese using the LANGUAGE OSD.

  • Page 11: Resetting The Adjustments

    Customizing Your Monitor Technical Features Getting Started Resetting the Adjustments Specifications Picture tube 0.25 - 0.27 mm aperture grill pitch, Resetting a specific adjustment: 21 inches measured diagonally, 90 degree deflection 1 Press the MENU button to display the MENU OSD Phosphor Type 2 Highlight the OSD containing the adjustment you want to Transmission Ratio...
  • Page 12 Customizing Your Monitor Technical Features Getting Started Resetting the Adjustments Specifications Picture tube 0.25 - 0.27 mm aperture grill pitch, Resetting a specific adjustment: 21 inches measured diagonally, 90 degree deflection 1 Press the MENU button to display the MENU OSD Phosphor Type 2 Highlight the OSD containing the adjustment you want to Transmission Ratio...

  • Page 13: Cabinet Removal

    2-1. CABINET REMOVAL Four screws (+ BVTP 4 x 16) Screw cover Four screws (+ BVTT 4 x 8) Two claws Top cover Screw cover Cabinet Four screws (+ BVTT 4 x 8) Video shield 2-2. D BOARD REMOVAL Screw Two screws (+ P 3.5 x 20) (+ BVTP 3 x 10)

  • Page 14: G Board Removal

    2-3. G BOARD REMOVAL Two screws (+BVTP 3 x 10) Screw (+ BVTT 4 x 8) G shield Two screws (+ BVTT 4 x 8) G board Three hooks Open the G block in the direction Two printed circuit board holders of the arrow .

  • Page 15: L Board Removal

    2-5. L BOARD REMOVAL CN5001 CN5004 CN5002 CN5003 L board Four printed circuit board holders 2-6. I/O TERMINAL BOARD REMOVAL CN401 CN511 CN402 Three screws (+ BVTT 3 x 8) I/O terminal board assy...

  • Page 16: Service Position

    2-7. SERVICE POSITION CAUTION : SHORT D,G boards Rear shield If the claw is hooked, opening and closing the board is impossible. Do not try to do it by force. D board (Refer to 2-2.) A board (Refer to 2-4.) If the claw is hooked, opening and closing G board...

  • Page 17: Picture Tube Removal

    2-9. PICTURE TUBE REMOVAL Open the D block (Refer 2-2.) Four screws (+ BVTT 4 x 8) Three connectors GND (DY) 6P (DY) A board 10P (DY) Anode cap Open the G block (Refer 2-3.) Neck assy Deflection yoke Picture tube •...

  • Page 18: Safety Related Adjustment

    D1626HT SECTION 3 SAFETY RELATED ADJUSTMENT When replacing or repairing the shown below table, the a) HV Regulator Circuit Check following operational checks must be performed as a 1) Confirm that the voltage of the pin 2 of CN901 on D safety precaution against X-rays emissions from the unit.

  • Page 19: Adjustments

    ADJUSTMENTS (µm) Landing Rough Adjustment <Specifications> Adjust so that the green is within 0 ± 3 0 ± 7.5 0 ± 3 1. Enter the full white signal. (or the full black dots signal). the specification given right. 2. Adjust the contrast to the maximum. 0 ±...
  • Page 20 Connect the communication cable of the computer to the connector located on the D board on the monitor. Run the service software and then follow the instruction. 1-690-391-21 A-1500-819-A 3-702-691-01 Interface Unit Connector Attachment IBM AT Computer To BUS CONNECTOR as a Jig D-sub mini Din...

  • Page 21: Diagrams

    SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAMS (POWER SW) CN520 CN504 CN512 (U-COM,DEFLECTION) LLC_RB CN891 POWER LLC_RT S891 H CONV HTR_SW LLC_LB AC L IN POWER V CONV STBY 8V LLC_LT AC L OUT LLC_LB CN511 C.SYNC_1 V.SYNC_1 C.SYNC_2 PS504 CN605 V.SYNC_2 DDC_SDA_1 IC002...
  • Page 22 TO FBT FV1 FV2 IC401 IC402 IC403 RGB SWITCH RGB PRE-AMP RGB OUT V901 PICTURE TUBE CN402 Q101 R IN 2 R_IN2 R_OUT R_IN R_OUT R_IN R_OUT G IN 2 G_IN2 G_IN G_OUT BUFFER Q201 B IN 2 B_IN2 G_OUT G_IN G_OUT B_IN...

  • Page 23: Schematic Diagrams And Printed Wiring Boards

    5-3. CIRCUIT BOARDS LOCATION Note: The components identified by shading and mark 5-2. FRAME SCHEMATIC DIAGRAM ¡ are critical for safety. Replace only with part number specified. Note: Les composants identifiés per un tramé et une CONNECTOR PANEL ¡ R IN 1 marque sont critiques pour la sécurité.
  • Page 24 D1626HT D1626HT D1626HT • D BOARD SEMICONDUCTOR LOCATION — D BOARD (Conductor Side) — — D BOARD (Component Side) — D012 G–2 -COM, D013 G–2 Conductor Component DEFLECTION Side Side D014 G–2 D015 G–2 IC001 F–3 D016 G–3 IC002 F–3 D019 F–1 IC003...
  • Page 25 (1) Schematic Diagram of D Board ROTATION+ TO L BOARD TO L BOARD ROTATION- CN5002 CN5001 CN520 CN512 CN509 :S-MICRO :S-MICRO :S-MICRO • D BOARD VOLTAGE LIST D027 D028 D029 R1022 D026 0 :CHIP MA153 MA153 MA153 MA153 µ-COM, +15V CN511 -15V H_CONV...

  • Page 26: Schematic Diagram Of D Board

    STBY+5V (POWER SENSOR) CN891 +15V C811 Q7504 2SA1037AK Q801 TO D BOARD AC L OUT CN7501 2SC3311A CN801 R7509 LED DRIVE Q802 CN501 B-TO-B :CHIP 2SC3311A R814 :S-MICRO L LED DRIVE AC L IN R7510 LED0 TO G BOARD • GA BOARD S891 :CHIP LED1...
  • Page 27 D1626HT D1626HT D162 (ga) V.STAT, H.STAT, LLC, POWER SUPPLY POWER SENSOR USER CONTROL GEO MAGNETIC SENSOR — L BOARD (Component Side) — — G BOARD — — L BOARD (Conductor Side) — — H BOARD — — GA BOARD — GA BOARD Terminal name of semiconductors in silk screen printed circuit (...

  • Page 28: Schematic Diagram Of A Board

    D1626HT D1626HT D1626HT (3) Schematic Diagram of A Board C458 IC401 IC402 IC403 C412 +12V FA4111 C101 M52348FP RGB PRE-AMP M52722P RGB DRIVE 0.01 C312 BLOCK 0.01 B:CHIP B:CHIP RGB OUT STBY+5V +12V C102 C402 R475 C305 47 16V R339 R314 B:CHIP R122...
  • Page 29 D1626HT D1626HT VIDEO AMP RGB OUT — A BOARD (Conductor Side) — — A BOARD (Component Side) — • A BOARD SEMICONDUCTOR LOCATION Conductor Component Side Side IC401 A–1 IC402 B–3 B–1 IC403 B–3 B–1 IC404 A–2 IC406 A–1 A–3 IC408 A–1 A–3...

  • Page 30: Semiconductors

    5-4. SEMICONDUCTORS...

  • Page 31: Exploded Views

    EXPLODED VIEWS • Items with no part number and no • Items marked " * " are not stocked since The components identified by shading description are not stocked because they they are seldom required for routine ¡ and mark are critical for safety.

  • Page 32: Picture Tube

    6-2. PICTURE TUBE Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la 7-685-663-71 +BVTP 4X16 and mark are critical for safety. sécurité. Ne les remplacer que par une ¢ 7-685-881-09 +BVTT 4X8 Replace only with part number specified.

  • Page 33: Electrical Parts List

    D1626HT SECTION 7 Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. ELECTRICAL PARTS LIST Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 34 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 35 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 36 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 37 D1626HT Les composants identifiés per un tramé The components identified by shading (a)(ga)(g) ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 38 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 39 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 40 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 41 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 42 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 43 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 44 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 45 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 46 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 47 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ et une marque sont critiques pour la and mark are critical for safety. Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
  • Page 48 D1626HT Les composants identifiés per un tramé The components identified by shading ¡ ¡ and mark are critical for safety. et une marque sont critiques pour la Replace only with part number specified. sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.

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