Table Of Contents - Sony TRINIT PVM-20M7MDE Service Manual

TABLE OF CONTENTS
Section
1. GENERAL
Features----------5
Location and Function of Parts and Controls •· ··· 6
Preparation ... 9
Operation 10
On-Screen Menus ............. 11
Troubleshooting 16
2. DISASSEMBLY
2-1. TopCoverandRearCoverRemoval ......................... 17
2-2. Terminal Board Removal------ 17
2-3. J,HBoardsRemoval -------17
2-4. Picture Tube Removal
-------18
3. CIRCUIT DESCRIPTIONS
3-1. A(l/4)Board(pagel)
-------19
3-2. A(2/4) Board(page 2) -------19
3-3. A(3/4) Board(page 3) •· -----19
3-4. A(414) Board (page4) -- •· -----19
3-5.
BBoard----------20
3-6. PBoard ------ ············•·21
3-7. C,G,HandQBoards ·············································•·21
3-8. PowerSavingCircuit •··············································•·21
3-9. Trouble Detection Circuit •······ • • •·························· 21
4.
SET-UP-ADJUS-TMEN'FS
4-1. Note -----------22
4-2. Working Conditions . .. .. 25
4-3. Landing Adjustment •··· 26
4-4. Focus Adjustment •· .................... 27
4-5. Convergence Adjustment .............. 27
4-6. 02 Adjustment ·· 29
4-7. WhiteBalanceAdjustment 29
4-8. Sub Brightness Adjustment 30
4-9. Sub Contrast Adjustment···· · 30
4-10.+BPowerLineCheck 31
4-11. HV. REF Adjustment... 31
4-12. HV. PROT. REF Adjustment 31
4-13.HV.PROTCheck•• 31
4-14. IK. PROTCheck 31
5. CIRCUIT ADJUSTMENTS
5-1.
ABoardAdjustment-------32
I. Preparation---------33
II. G2Adjustment ----- ................. 33
ill. Horizontal Oscillating Frequency Adjustment •···· 34
1. PAL FO Adjustment .......................................... 34
2. l125FOAdjustrnent·· ...................................... 34
3. FREE-PAL FO Adjustment---- 34
(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 II
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.
Title
~
IV. FocusAdjustment-------35
V. Deflection System Adjustment---- 35
l. Deflection System Check -----35
2. Vertical Deflection Rough Adjustment•·· ..... 35
3.
Horizontal Deflection Rough Adjustment •· ····
35
VI. Signal System Adjustment -----36
1. Crystal Oscillator Adjustment ... ····· 36
2. PAL Color Decode Adjustment •· ..... 36
3. PALColorLeve!Adjustment •· ..... 37
4. Matrix Adjustment
------38
5. PAL Y/C Color Level Adjustment··· ..... 39
6. NTSC Color Demodulation Adjustment •·· ····· 39
7. NTSC Color Level Adjustment •· ..... 39
8. NTSC Y/C Color Level Adjustment ··· ····· 40
9. Component Color Level Adjustment-I
(NlO/SMPTE) ----- ····· 40
10. Component Color Level Adjustment-2
(Betacam)------ ..... 40
11. ROB Color Level Adjustment .. . .... 40
12. HD Component Matrix Adjustment•·· ..... 41
5-2.
G
Board Adjustment•·· ..... 41
6. DIAGRAMS
6-1. BlockDiagrams(l)-------43
Block Diagrams (2) -------47
__ B1ockDiagrams(3) ------~SI
Block Diagrams (4) .. -----
54
6-2. Frame Schematic Diagram ·· ---- ..... 57
6-3. CircuitBoardsLocation
------59
6-4. Printed Wiring Boards and Schematic Diagrams •· ··· 59
•ABoard-------- ..... 60
•BBoard -------- .....
gs
• Q, P, J andHBoards
-------97
•CandXBoards --------104
•GBoard
---------109
6-5. Semiconductors----- ··· 113
7. EXPLODED VIEWS
7-1. Chassis----------115
7-2. PictureTube---------116
8. ELECTRICAL PARTS LIST·-·. . .. 117
rcAUTION : Double-pole/neutral fusingJ
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
.&
ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS
UST ARE CRITICAL TO 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 TO SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL
FOLLOW THESE PROCEDURES WHENEVER CRITICAL
COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS
SUSPECTED.
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