-4-
Importantsafetynotice...................2
Safetyprecautions..................2
Generalguidelines..................2
Leakagecurrentcoldcheck...........2
Leakagecurrenthotcheck ...........2
X-rayradiation.....................2
Horizontal oscillator disable circuit test . . 2
Servicenotes ...........................5
Leadless chip component
(surfacemount).................5
Componentremoval ................5
Chip component installation . . ........5
HowtoreplaceFlatIC...............5
Horizontal oscillator disable circuit . . . . . 6
Receiverfeaturetable ....................7
Locationofcontrols(receiver).............9
Quick reference control operation . . . . . . 9
Locationofcontrols(remote).............10
Disassemblyforservice .................11
Backcover.......................11
A-Board.........................11
L-Board.........................11
Speakers........................11
Keyboard push button assembly . . . . . . 11
Disassembly for CRT replacement . . . . 11
CRTreplacement .................11
Backcoverremoval.....................13
Chassis service adjustment procedures . . . . 14
140.0V B+ Voltage confirmation . . . . . . 14
Sourcevoltagechart...............14
Highvoltagecheck ................14
Purityandconvergenceprocedure ........15
When the CRT or the yoke is replaced . 15
Verticalrastershiftadjustment .......15
Initial center static convergence . . . . . . 16
Purityadjustment..................16
Finalconvergenceprocedure........16
Dynamic corvergence adjustment . . . . . 16
DY(YHC,YV,XV)adjustment........16
YV Adjustment (VR1 for
Horizontal dynamic convergence). . 16
YH Adjustment (VR2 for
vertical dynamic convergence) . . . . 17
XV Adjustment
(preciseadjustment)............17
Permalloy convergence corrector
strip(partNo.0FMK014ZZ) ......17
DAFadjustment...................17
Servicemode(electroniccontrols).........19
Quickentrytoservicemode.........19
To toggle between aging and
servicemodes.................19
Exitingtheservicemode............19
Tocheckcolors...................19
Entering service mode
(open-back method) . . . . . .......19
Tocheckpurity ...................21
Instructional flow chart for service mode22
Service adjustments (electronic controls). . . 24
Sub-Contrastadjustment............24
Sub-Brightness(BRIGH)............24
Tint/Coloradjustment ..............24
Tint/Color adjustment
(Norainbowpattern)............25
Color temperature adjustment
(B/WTracking) ................25
Completeadjustment...............25
Horizontalcentering(H-POS)........26
Horizontal width adjustment (H-WIDTH) 26
Horizontal trapezoid
adjustment(HTRAP)............26
Parallelogram adjustment (R524) . . . . . 26
East west PCC balance
adjustment(SIDE)..............26
Vertical linearity adjustment (V-C) . . . . . 27
Vertical correction adjustment (V-S) . . . 27
Vertical size and vertical position
adjustment(VEAMP&VRAS) ....27
PCCadjustment(PCC).............27
Corner PCC adjustment
(TOPG, TOPSL, BTMG, BTMSL) . . 27
MTScircuitadjustments ............28
Inputleveladjustment(MTSIN).......28
Stereo separation adjustment
(SEPAL&SEPAH).............28
Clockadjustment(CLOCK)..........28
Service adjustments
(mechanicalcontrols)...........28
Focus(partofT551) ...............28
Audiosignalpathblockdiagram..........29
Videosignalpathblockdiagram ..........30
Description of connectors. . . . ............31
Component identification . . . . ............33
Partslist ..............................36
Schematics, voltages and waveforms
A-Boardschematic....................50
A-Boardvoltages.....................54
D-Boardschematic....................56
D-Board voltages . . . . . . . . . ............59
A-Boardwaveforms...................60
G-Boardschematic ...................62
G-L-Boardvoltages...................65
L-Boardschematic....................66
A-Boardpcb.........................68
D-Boardpcb.........................70
G-Boardpcb.........................72
L-Boardpcb.........................74
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