Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_42PQ20_Block_Diagram_[SCH]

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LG_42PQ20_Block_Diagram_[SCH]


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                                                                                        Y-SUS DRIVE WAVEFORM                                                                       42PQ20 CIRCUIT INTERCONNECT DIAGRAM
                                                          VR601
                                                      V Set-Up (Ramp)
      Y-SUS TP                                                                                                                                                                    P811                                        P813
                                                                                                                                               4mS
                                                  180V       A                                                                                                        M5 (9,10)               Pin                     Label   STBY Run                 No Load
                                                  + 5V
                                                  -                                                                                                                   Va (6,7)                1, 2                    17V     0V      17V                 17V                                                                                                  Z-SUS
                                                 0V                                                                                                                                           3, 4                    Gnd     Gnd     Gnd                Gnd
                                                                                                                                                                      Vs (1,2)                                                                                                         R502
                                                                                                                                                                                              5, 6                    12V      0V     12V                 12V
                                                                       V Set-Down          B                                                                                                  7, 8                    Gnd     Gnd     Gnd                Gnd                                                                      P2
                                                        VR401                                                                                                                                                                                                                          VA Adj
                                                                      192us + 5us
                                                                             -                                                               P201 Y-SUS and P811 SMPS                                                                                                 VS Adj                                      Pin     Label        STBY    Run
                                                                                                                                                                                              9, 10                  9, 10    5V       5V                 5V
                                                                                                                                       Pin      Label     STBY        Run                                                                                                                                          1    Z SUS Dn        0V    0.79V
      P201




                                                                                                                                                                                             11, 12                  11, 12   5V       5V                 5V
FPC




                                                                            50VAC rms     100uS          528V P/P                       1        Vs        0V       *193V                                                                                                                                          2    Z SUS Up        0V    0.13V
                                                                                                                                        2        Vs        0V
                                                                                                                                                                                             13, 14                  13, 14   Gnd     Gnd                Gnd           R901                                        3     Z ER Up        0V    0.19V
                                                                                                                                                                    *193V
                                             Connect Scope between Waveform TP on Y-Drive and Gnd                                       3        nc        nc         nc                     15, 16                  15, 16   Gnd     Gnd              Gnd/nc                                                      4     Z ER Dn        0V     0.4V
                                                                                                                                        4        Gnd       0V         0V                       17                    5V Det   0V       5V                 5V                                                       5      Z Bias        0V     1.9V
                                                                                                                                        5        Gnd       0V         0V                       18                    AC Det   4.6V    4.6V                5V                                                       6     Z Enable      0V      0.8V
                                                                                 Y-SUSTAIN                                              6        Va        0V       *60V                       19                    RL On    0V     3.73V                0V                                                      7     Z Ramp Dn      0V      1.9V                41V (AC) rms       400us       200Vp/p
                                                                                                                              P201                                                                                                                                       SMPS PCB                                 8        Gnd         Gnd     Gnd
                                                                                                                                        7        Va        0V       *60V                       20                    Vs On    0V      3.2V                0V
                                                                                                                                                                                                                                                                       POWER SUPPLY
      P202




                                                                                                                                        8        Gnd       0V         0V                                                                                                                                          9       Gnd          Gnd     Gnd
FPC




                                                                                                                FS202                                                                          21            M5 On            0V     3.26V                0V
                                                                                                                                                                                                                                                                                                                  10
             Waveform




                                                                                                                                        9        M5V       0V         5V                                                                                                                                                  +5V          0V      4.9V
                                                                                                                 (VS)                                                                          22           Auto Gnd          0V       0V                 5V                                                                                                              Z-SUSTAIN                            P6
                                                                                                               250V 4A                  10       M5V       0V         5V                                                                                                                                          11      +15V         0V     16.9V
                                                                                                                                       *Variable according to Panel Label
                                                                                                                                                                                               23                    Stby5V   5V       5V                 5V                                                      12      +15V         0V     16.9V
                                                                                                                    Glass
                                                                                                                                                                                               24                Key On       0V       0V                 5V
                                                                                                                                                    P206




                                                                                                                                                                                                                                                                                                                                                                                                                     FPC
                                                                                                                                                                                                                                                                                         P813
                                                                                                                                       Pin    Label STBY      Run
                                                                                                                                                                                                                SC101 A/C IN
             TP                                                                                                                         1     er com 0V      *94.9V                                                                                                                                                                                                                                  Z-SUS
                                      P203
                                      P101




                                                                                               No IPMs




                                                                                                                                        2     er com 0V      *94.9V               SMPS Test 



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