Table Of Contents - Sony Multiscan GDM-2036S Service Manual

~DM
.. 2036S
TABLE OF CONTENTS
Section
Title
1. GENERAL
1-1. Function of Controls .............. , . . .. . . .. . . .. . . . ... 6
1-2. Connections········································· 8
1-3. Preset Mode· . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9
1-4. Adjustment········································· ·10
2. DISASSEMBLY
2-1. Rear Cabinet and Top Cover Removal· ............... ·14
2-2. H-STAT VR and Focus Pack Removal················ ·14
2-3. Bezel Removal ..................................... ·15
2-4. H4 Board Removal ................................. ·15
2-5. Power Switch Removal· ............................. ·16
2-6. A, Bl, C and Ml board Removal····················· ·16
2-7. G Board (Switching Regulator) Removal· ............. ·17
2-8.
N Board Removal· .................................. ·17
2-9. D3 Board Service Position· .......................... ·18
2-10. Picture Tube Removal· ............................... 19
2-11. Wiring Hamess Layout· ............................. ·20
2-11-1. A, Bl, C and Ml Board ..
······················2O
2-11-2. D3 Board, N Board, Focus Pack
and H. STAT VR· ............................ ·21
2-11-3. D3 Board Location ........................... ·22
2-11-4. D3 Board Location ........................... ·23
3. CIRCUIT DISCRIPTIONS
Section
3-4-5.
3-4-6.
3-4-7.
3-4-8.
Title
Dynamic Focus Circuit ·······················28
High Voltage Hold-Down Circuit············· ·29
Beam Protector Circuit· ...................... ·29
CRT Protector ...................•.......... ·29
3-4-9. H, V Static Convergence· .................... ·29
3-5. H4 Board ......................................... ·29
3-6. Ml Board· ........................................ ·29
3-7. G Board·········································· ·29
3-7-1. AC Input-Degauss Circuit-Rect
&
Smoothing Section ........................... ·29
3-7-2. Start-Up and Oscillation Circuit· ............. ·30
3-7-3.. Converter section ............................ ·30
3-7-4. OCP Circuit (Overcurrent Protector Circuit) ····31
3-7-5. OVP Circuit (Overvoltage Protector Circuit) .,. ·31
3-7-6. Fall Mode·································· ·31
3-8. N
board···········································
·31
3-8-1. Composition································ ·31
3-8-2. Horizontal and Vertical Oscillations
Sync Circuit· ............................... ·31
3-8-3. Picture Distortion Correction Wavefonn
Generation Circuit· .......................... ·32
3-8-4. CPU Periphery Circuit· ...................... ·32
3-8-5. Picture Distortion Correction Adjustment Circuit
CD/A Converter and Its Periphery Circuit) ······33
3-1. A Board
············································25
4. TROUBLE SHOOTING
3-1-1. Composition· ................................
·25
3-1-2. Contrast Amplifier
(AAI
Board)· ..............
·25
3-1-3. Pedestal Clamp
(AAI
Board)· .................
·25
3-1-4. Inserting the Blank Tip Pulse (AAI Board)
······25
3-1-5. Video Output Amplifier· ...................... :
25
3-1-6. Blanking Circuit and Bias Circuit G 1 ........... ·26
3-2. Bl Board···········································26
3-2-1. Sync Separation Circuit ....................... ·26
3-2-2. Blank Tip Pulse Generation Circuit ·············26
3-2-3. Blank Mix Circuit· ........................... ·26
3-2-4. Interface····················· .. ·············· ·27
3-3. C Board ············································27
3-4. D3 Board .......................................... ·27
3-4-1. PWM Reference, H SAW Generating Circuit ····27
3-4-2. Horizontal Deflection Circuit· ................. ·27
3-4-3. High-VoltageCircuit .......................... 28
3-4-4. Vertical Deflection Circuit ·····················28
--4-
4-1. Trouble Shooting .................................. ·36
4-2. Parts Level Board Repair··· .. · .. · .. ········· .... · .. ·51
4-2-1. D3 Board ................................... ·52
4-2-2. Bl Board· .................................. ·62
4-2-3. A Board' ................................... ·64
4-2-4. G Board···································· ·67
4-2-5. N Board····························· ....... ·71
5. SAFETY RELATED ADJUSTMENT············
·87
6. ADJUSTMENTS
6-1. Adjustments Procedure· ............................ ·88
6-2. Picture Projection Test······························9O
6-2-1. Picture Projection ............................ 90
6-2-2. Checking the Operation of Bach Section········9O
6-2-3. Checking the Voltage· ....................... ·90