Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_50PG20_Block_Diagram_[SCH]

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.

Image preview - the first page of the document

>> Download LG_50PG20_Block_Diagram_[SCH] documenatation <<

Text preview - extract from the document
                                                                                                                                                                                                                                                                                                                                                                                       Z-SUS DRIVE WAVEFORM

                                                                             Y-SUS DRIVE WAVEFORM                                                                                        50PG20 INTERCONNECT DIAGRAM
                                                                                                                                                                                                                                                                                                                                                                                                                                               VZ Bias
                          (RAMP) SUS-UP
                                                                                                                                                                     During SMPS Test (Described below), P803 disconnected;
                                                                                                                                                                     1) P801 and P802 connected. Y-SUS and Z-SUS will produce sustain waveforms.
                                                                                                                                                                     2) P801 connected P802 disconnected, Y-SUS will produce sustain waveform, Z-SUS does not.
 Y-SUS TP                                                                                                                                                            3) P801 disconnected P802 connected. No SUS waveforms are produced due to a loss of control PWB B+
                                                                                                                                                                        routed through the Y-SUS PWB.

                                                                                                                                                           Vs, Va and M5V                                                                                                                                                                                                                           52V (AC) rms                                                Z-SUS TP
                                                                                                                                                                                          P803 Connector "SMPS" to P701 "Main"                            VS Adj
                                                                                                                                                                                                                                                                      P801                                                                                       Use RMS just for a check to see if Z-SUS is running.
                                                                                                                                                                                           Pin      Label      STBY Run             No Load       Diode                                                                                                                         Not for Adjustments
                                                                                                                                                                                                                                                                                          Vs, Va and M5V
P110                          72V~83V (AC) rms                                               (RAMP) SUS-DOWN
                                                                                                                                                                                           1, 2      15V            0V     16V        16V         2.26V                 P802
                                (Dark to White)                                                   100uS                                                                                    3, 4      Gnd        Gnd        Gnd        Gnd         Gnd
        Y-SUS Top

                                                                                                                                                                                           5, 6      12V            0V     12V        12V           2V                                                                                                                                             FS1 (Vs)
                               Use RMS just for a check to see if Y-SUS is running.                                                                                                        7, 8      Gnd        Gnd        Gnd        Gnd         Gnd                                                   P2 / P163                                                                                  250V 4A                                                         Z-SUS TP
                                              Not for Adjustments                                                                                                                          9-12       5V            5V     5V          5V         1.7V                                      Pin    Label        STBY      Run
                                                                                                                                                                                                                                                                                                                                                                                                                  VZB TP
                                                                                                                                                                                                                                                                                             1     SUS-DN           0V    16V
                                                                                                                                 FS201 Vs                                                 13-16      Gnd        Gnd        Gnd        Gnd         Gnd                 VA Adj
                                                                                                                                                                                                                                                                                             2     SUS-UP           0V    16V                      P3
                                                                                                                                   250V 4A                                                  17     5_V Det          0V     5V          5V         1.56V                                                                                                                                                                                                      P6
                                                                                                                                                                                                                                                                                             3     ER-DN            Gnd   Gnd                    FS2 (5V)
                                                                                                                                                                                            18     AC Det           5V     5V          5V         2.56V                                                                                          125V 10A
                                                                                                                                                                                                                                                                    SMPS                     4     ZBIAS            0V    0.48V

                       P206                                                                                                                                                                 19     RL_On            0V    4.5V         0V         2.6V
                                                                                                                                                                                                                                                                   POWER                     5     ZB-CON           0V    0.27V
                                         Discrete Components (Non-IPMs)

                                                                                                           Discrete Components
                                                                                                                                                                                            20     Vs_On            0V    3.2V         0V         2.7V                                       6     ER-UP            0V    0.1V

P130                   FG5V                                                                                                                                                                 21     M5V_ON           0V    3.2V         0V         2.6V                                       7     ENABLE           0V    0.06V

                                                                                                                                                                                                                                                                                                                                                                                                                    Discrete Components
                          Set-dn                                                                                                                                                                                                                                                             8      none            Gnd   Gnd
                                                                                                                                                                                            22      AUTO            0V     0V          5V         2.1V                                                                                                                                                                                                             Z-SUS TP

                                                                                                                                                                                                                                                                                                                                                                             Discrete Components
                                                                                  Y-SUS                                                                     P102 / P111

                                                                                                                                                                                                                                                                                             9      none            0V     0V
                                                                                                                                                 Pin       Label    STBY    Run           A/C IN                                                                      P803
P140                                                                                                                                                                                                                                        No Connection                                    10     none            0V    1.93V

                       -VY TP                                                                                                                     1        CLK       0V    3.2V
                            R201                                                                                                                                                                                                                P701                                         11     none            0V    2.66V
                                                                                                                                                  2        STB       0V    0.76V
                                                                                                                                                  3       OSC1       0V     0V                                                                                                               12     none            Gnd   Gnd
                                                                                                                                                  4       OSC2       0V     3V           SMPS Test 

◦ Jabse Service Manual Search 2020 ◦ Jabse Pravopis ◦ Other service manual resources online : FixyaeServiceinfo