Board Level Troubleshooting using the Wiring Interconnect
Figure 46
Before the set can be repaired to a component level, it is necessary to determine which board is
defective. The Wiring interconnect diagram is a useful tool for this.
Dead Set
The Standby Power supply and Rectifiers are located on the Input panel. Control for power On/Off is
performed by the Microprocessor located on the SSB. This Processor is powered by the 5-volt
standby voltage from the Input Panel. For a Dead Set condition, check the 5-volt standby supply on
Pin 1 of 1102. If this voltage is present, check the Standby line on Pin 3. This line will be
approximately 2.6 volts in standby and zero volts when the set is turned On. If the Standby line goes
Low, check the 130-volt source on Pin 8 of connector 1518. If this voltage is present, the Full Power
supply on located on the Large Signal panel is working. If the Picture is not present but audio is, the
High voltage or video drive circuits may have failed. Checking the Screen voltage from the Focus G2
block will indicate whether the High Voltage circuit is working or not. Horizontal and Vertical drive from
the HOP panel must be present for the High Voltage to be present. Horizontal drive should be present
on Pin 9 of 1510 and Vertical drive should be present on Pin 3.
Summary of Contents for DPTV305
Page 1: ......
Page 5: ......
Page 27: ...Voltage Checks Display DPTV300 Series Voltage Diagram ...
Page 100: ...DPTV305 7621 ...
Page 101: ...DPTV305 7621 ...
Page 102: ...DPTV305 7621 ...
Page 103: ...DPTV305 7621 ...
Page 104: ...DPTV305 7621 ...
Page 105: ...DPTV305 7621 ...
Page 106: ...DPTV305 7621 ...
Page 107: ...DPTV305 7621 ...
Page 108: ...DPTV305 7621 ...
Page 109: ...DPTV305 7621 ...
Page 110: ...DPTV305 7621 ...
Page 111: ...DPTV305 7621 ...
Page 112: ...DPTV305 7621 ...
Page 113: ...DPTV305 7621 ...
Page 114: ...All Models 7621 HDR2002 Interconnect ...
Page 115: ...All Models 7621 Power Supply Panel Schematic ...
Page 116: ...All Models 7621 LSB Panel Schematic 1 of 3 ...
Page 117: ...All Models 7621 LSB Panel Schematic 2 of 3 ...
Page 118: ...All Models 7621 LSB Panel Schematic 3 of 3 ...
Page 119: ...All Models 7621 SSM Panel Schematic 1 of 8 ...
Page 120: ...All Models 7621 SSM Panel Schematic 2 of 8 ...
Page 121: ...All Models 7621 SSM Panel Schematic 3 of 8 ...
Page 122: ...All Models 7621 SSM Panel Schematic 4 of 8 ...
Page 123: ...All Models 7621 SSM Panel Schematic 5 of 8 ...
Page 124: ...All Models 7621 SSM Panel Schematic 6 of 8 ...
Page 125: ...All Models 7621 SSM Panel Schematic 7 of 8 ...
Page 126: ...All Models 7621 SSM Panel Schematic 8 of 8 ...
Page 127: ...All Models 7621 SSB Module Schematic 1 of 6 ...
Page 128: ...All Models 7621 SSB Module Schematic 2 of 6 ...
Page 129: ...All Models 7621 SSB Module Schematic 3 of 6 ...
Page 130: ...All Models 7621 SSB Module Schematic 4 of 6 ...
Page 131: ...All Models 7621 SSB Module Schematic 5 of 6 ...
Page 132: ...All Models 7621 SSB Module Schematic 6 of 6 ...
Page 133: ...All Models 7621 Red CRT Panel Schematic ...
Page 134: ...All Models 7621 Green CRT Panel Schematic ...
Page 135: ...All Models 7621 Blue CRT Panel Schematic ...
Page 136: ...All Models 7621 Auto Convergence Panel 1 of 3 ...
Page 137: ...All Models 7621 Auto Convergence Panel 2 of 3 ...
Page 138: ...All Models 7621 Auto Convergence Panel 3 of 3 ...
Page 140: ...NOT USED IN MODELS 51MP392H 17 51MP3964H 17 7621 Side Jack Panel Schematic ...
Page 141: ...USED ONLY IN MODELS 51MP392H 17 51MP3964H 17 7621 Side Jack Panel Schematic ...
Page 142: ...All Models 7621 Keyboard Panel Schematic ...
Page 145: ...All Models 7621 HOP Panel Schematic 1 of 2 ...
Page 146: ...All Models 7621 HOP Panel Schematic 2 of 2 ...
Page 155: ...All Models 7621 Power Supply Panel CBA Top View ...
Page 156: ...All Models 7621 Power Supply Panel CBA Bottom View ...
Page 157: ...All Models 7621 LSB Panel CBA Top View ...
Page 158: ...All Models 7621 LSB Panel CBA Bottom View ...
Page 159: ...All Models 7621 SSM Panel CBA Top View ...
Page 160: ...All Models 7621 SSM Panel CBA Bottom View ...
Page 161: ...All Models 7621 SSB Module CBA Top View ...
Page 162: ...All Models 7621 SSB Module CBA Bottom View ...
Page 163: ...All Models 7621 Keyboard Panel CBA Top View ...
Page 164: ...All Models 7621 Keyboard Panel CBA Bottom View ...
Page 165: ...All Models 7621 CRT Panel CBA Top View ...
Page 166: ...All Models 7621 CRT Panel CBA Bottom View ...
Page 167: ...All Models 7621 Auto Convergence Panel CBA Top View ...
Page 168: ...All Models 7621 Auto Convergence Panel CBA Bottom View ...
Page 169: ...All Models 7621 HOP Panel CBA Top View ...
Page 170: ...All Models 7621 HOP Panel CBA Bottom View ...
Page 171: ...All Models 7621 PIP Panel CBA Single 2 Tuner Panels Top View ...
Page 172: ...All Models 7621 PIP Panel CBA Single 2 Tuner Panels Bottom View ...
Page 173: ...All Models 7621 Side Jack Panel CBA Top View ...
Page 174: ...All Models 7621 Side Jack Panel CBA Bottom View ...
Page 175: ...All Models 7621 Side Jack Panel CBA Top View ...
Page 176: ...All Models 7621 Side Jack Panel CBA Bottom View ...
Page 177: ...All Models 7621 3D Comb Filter Panel CBA Top View ...
Page 178: ...All Models 7621 3D Comb Filter Panel CBA Bottom View ...
Page 179: ...All Models 7621 DW PIP Panel CBA Top View ...
Page 180: ...All Models 7621 DW PIP Panel CBA Top View ...
Page 181: ...All Models 7621 DVI Panel CBA Top View ...
Page 182: ...All Models 7621 DVI Panel CBA Bottom View ...
Page 183: ...All Models 7621 Rear Switch Panel Top View only ...
Page 184: ...43 Cabinet Exploded View ...
Page 185: ...46 51 55 60 Cabinet Exploded View ...
Page 186: ...50 60 Cabinet Exploded View ...
Page 187: ...CRT Assembly Exploded View ...
Page 780: ...55PW9383 17F continued S Safety Part Be sure to use exact replacement part ...
Page 1592: ...55PW9383 17F continued S Safety Part Be sure to use exact replacement part ...
Page 1615: ...55RW9515 35 continued S Safety Part Be sure to use exact replacement part ...