CPD-G420 (serv.man4) - Sony Monitor Service Manual (repair manual)

cpd-g420 (serv.man4) service manual
Model
CPD-G420 (serv.man4)
Pages
73
Size
3.53 MB
Type
PDF
Document
Service Manual
Brand
Device
Monitor
File
cpd-g420-sm4.pdf
Date

Read Sony CPD-G420 (serv.man4) Service Manual online

 SERVICE MANUAL
19CR1 
CHASSIS 
Design and specifi cations are subject to change without notice.
TRINITRON
®
 COLOR MONITOR
AEP Model
Chassis No: SCC-L33CA
CPD-G420
9-978-887-01
SPECIFICATIONS
Self Diagnosis
Supported model
Defl ection frequency*    Horizontal: 30 to 110 kHz
 
 
  Vertical: 48 to 170 Hz
AC input voltage/current 100V to 240V, 50 - 60Hz,
 
 
  2.0 - 1.0 A
 
 
Dimensions 
  451 x 471 x 461 mm (w/h/d)
   
(17
7/8
 x 18
5/8
 x 18
1/4
 inches)
Mass 
 
  Approx. 25.5 kg (56 lb 3 oz.)
Plug and Play  
DDC2B/DDC2Bi, 
GTF**
*  Recommended horizontal and vertical timing condition
 
•  Horizontal sync width duty should be more than 4.8% of 
total horizontal time or 0.8 µs , whichever is larger.
 
•  Horizontal blanking width should be more than 2.3 µsec. 
 
•  Vertical blanking width should be more than 450 µsec.
**  If the input signal is Generalized Timing Formula (GTF) 
compliant, the GTF feature of the monitor automatically 
provides an optimal image for the screen.
Picture tube 
0.24 mm aperture grill pitch (center)
  19 
inches 
measured 
diagonally
  90-degree 
defl ection
  FD 
Trinitron
Video image area 
18" maximum viewing image
 
 
Approx. 365 X 274 mm (w/h)
  (14
3/8
 x 10
7/8
  inches)
Resolution   
 
Maximum: 
Horizontal: Max. 1920 dots
 
 
Vertical: Max. 1440 lines
  Recommended: 
Horizontal: Max. 1280 dots
 
 
 
Vertical: Max. 1024 lines
Standard image area  Approx. 352 x 264 mm (w/h)
  (13
7/8
 x 10
1/2
  inches)
Input signal
 
Video 
Analog RGB  (75 ohms typical)
   
0.700 
Vp-p 
Positive
 
Sync 
H/V Separate or Composite Sync:
 
 
  TTL 2k ohms, Polarity Free
 
 
Sync on Green:
   
0.3 
Vp-p 
Negative
Power Consumption 
  Approx. 130 W (without any 
 
 
  USB Devices Connected)
— 3 —
CPD-G420
SECTION TITLE 
PAGE
 Power 
Management.................................................................................................................................. 4
 
Self Diagnosis Function ............................................................................................................................ 4
 Timing 
SpeciÞ cation.................................................................................................................................. 4
 
Warnings and Cautions............................................................................................................................. 5
 Safety 
Check-Out 
.................................................................................................................................... 6
 
1. Disassembly
 1-1. 
Cabinet 
Removal............................................................................................................................... 7
 1-2. 
Service 
Position ................................................................................................................................ 8
 
1-3. A1 Board (C Block) Removal ............................................................................................................ 9
 
1-4. A1 Board and US Board Removal .................................................................................................... 9
 
1-5. Bezel Assembly and H1 Board Removal ........................................................................................ 10
 
1-6. D Board Removal............................................................................................................................ 10
 1-7. 
Picture 
Tube 
Removal......................................................................................................................11
 
 
Anode Cap Removal ........................................................................................................................11
 1-8. 
Harness 
Location ............................................................................................................................ 12
2. Safety Related Adjustments
 
2-1. HV Regulator Circuit Check ............................................................................................................ 13
 
2-2. HV Protector Circuit Check ............................................................................................................. 13
 
2-3. Beam Current Protector Circuit Check............................................................................................ 13
3. Adjustments
 3-1. 
Landing 
Rough 
Adjustment ............................................................................................................. 14
 3-2. 
Landing 
Fine 
Adjustment................................................................................................................. 14
 3-3. 
Convergence 
Rough 
Adjustment .................................................................................................... 15
 
3-4. White Balance Adjustment SpeciÞ cation......................................................................................... 15
 
3-5. Vertical and Horizontal Position and Size SpeciÞ cation .................................................................. 15
 3-6. 
Focus 
Adjustment............................................................................................................................ 15
4. Diagrams
 4-1. 
Circuit 
Boards 
Location ................................................................................................................... 16
 
4-2. Printed Wiring Board and Schematic Diagram Information............................................................. 16
 4-3. 
Block 
Diagrams ............................................................................................................................... 17
 
4-4. Schematics and Supporting Information ......................................................................................... 20
 
 
A1 Board - Schematic Diagram....................................................................................................... 20
 
 
D Board - Schematic Diagram ........................................................................................................ 22
 
 
DA Board - Schematic Diagram ...................................................................................................... 24
 
 
N Board - Schematic Diagram ........................................................................................................ 25
 
 
H1 Board - Schematic Diagram ...................................................................................................... 26
 
 
US Board - Schematic Diagram ...................................................................................................... 27
 4-5. 
Semiconductors .............................................................................................................................. 29
5. Exploded Views
 5-1. 
Picture 
Tube 
................................................................................................................................... 31
 5-2. 
Chassis ........................................................................................................................................... 32
 5-3. 
Packing 
Materials............................................................................................................................ 33
6. Electrical Parts List   ....................................................................................................................................... 34
TABLE OF CONTENTS
— 4 —
CPD-G420
        Power consumption       Screen     Horizontal        Vertical            Power           Recovery time             Indicator
        mode                               (video)     sync signal   sync signal   consumption
1      Normal operation              active             yes                 yes               < 130 W                     --                         Green
2      Active-off (3rd mode)        blank             no*                  no*                 < 3 W           Approx. 10 sec.              Amber
3      Power-off                               --                  --                     --             0 W (approx)                 --                            Off
*   In this mode, the signal appears in one of three ways:  The Horizontal Sync Signal alone off, the Vertical Sync Signal 
    alone off, or both signals off.     
POWER MANAGEMENT
The power saving mode complies with the VESA Display Power Management Signaling standard.  Each state of power management shall be 
activated by the host computer terminating the appropriate sync signals.  Blanking the video must precede termination of the sync signals.  The 
elapsed time counter shall also be controlled by the host computer.  Reactivation of the monitor shall be accomplished from the host computer by 
re-establishing the normal sync signal.
TIMING SPECIFICATION
SELF DIAGNOSIS FUNCTION
When a failure occurs, the STANDBY/TIMER lamp will fl ash a set number of times to indicate the possible cause of the problem.  If there is more 
than one error, the lamp will identify the fi rst of the problem areas.
1
2
3
5
4
Status
Area of Failure
LED Indication
Amber (0.5 second) / Off (0.5 second)
Amber (0.5 second) / Off (1.5 second)
+B
Horizontal/Vertical Deflection Failure
Thermal Protector
ABL Protector
HV Failure
Failure 1
Failure 2
Failure 3
Failure 4
Aging/Self Test
6
Out of scan range
Amber (1.5 second) / Off (0.5 second)
Green (0.5 second) / Off (0.5 second)
Green (OSD Indication)
Amber (0.25 second) / Off (0.25 second)
Amber (0.25 second) / Off (1.25 second)
Amber (0.5 second) / Off (0.5 second)
 
Aging Mode (Video Aging): 
During Power Save, press MENU button for longer than 2 seconds.
 
Self Test (OSD Color Bar): 
During Power Save, push up Control button for longer than 2 seconds.
 
Reliability Check Mode: 
During Power Save, push down Control button for longer than 2 seconds.
MODE
1
2
3
Resolution (H x V)
640 X 480
1280 X 1024
1600 X 1200
Dot Clock (MHz)
25.175
157.500
229.500
HORIZONTAL
Hor. Freq. (kHz)
31.469
91.146
106.250
H-Total
31.778
10.971
9.412
H-Blanking
6.356
2.844
2.440
H-Front Porch
0.636
0.406
0.279
H-Sync.
3.813
1.016
0.837
H-Back Porch
1.907
1.422
1.325
H-Active
25.422
8.127
6.972
(µsec)
VERTICAL
Ver. Freq. (Hz)
59.940
85.024
85.000
V-Total
525
1072
1250
V-Blanking
45
48
V-Front Porch
10
V-Sync.
V-Back Porch
33
2
46
V-Active
480
1
44
3
50
1
3
1024
1200
(lines)
SYNC.
Int (G)
Ext (H/V)/Polarity
YES -/-
YES +/+
YES +/+
Ext (C/S)/Polarity
NO
NO
NO
NO
NO
NO
Int/Non Int
NON INT
NON INT
NON INT
— 5 —
CPD-G420
WARNINGS AND CAUTIONS
CAUTION
Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield, or carbon painted on the CRT, after 
removing the anode.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this 
receiver is directly connected to the ac power line.
!
 
SAFETY-RELATED COMPONENT WARNING!!
Components identifi ed by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe 
operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements published 
by Sony. Circuit adjustments that are critical for safe operation are identifi ed in this manual. Follow these procedures whenever critical 
components are replaced or improper operation is suspected. 
ATTENTION!!
Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique de 
l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.
Afi n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout 
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifi es par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces 
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero de 
piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance est 
critique pour la securite du fonctionnement sont identifi es dans le present manuel. Suivre ces procedures lors de chaque remplacement 
de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.
Page of 73

Download Sony CPD-G420 (serv.man4) Service Manual (Repair Manual)

Here you can read online and download Sony CPD-G420 (serv.man4) Service Manual in PDF. CPD-G420 (serv.man4) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony CPD-G420 (serv.man4) Monitor. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.