Guide Plus - Smart Clock
Guide Plus or Gemstar is a menu-driven broadcast information service broadcast on ABC
affiliate stations.
(
Figure 4)
TV guide company provides the service which contains information
similar to their weekly magazine. The free service provides two to three days of programming
per download. When the set is turned off, the set tunes to the ABC affiliate station,
downloading Channel Guide information when it is broadcast. The data is serially transmitted
during the vertical blanking interval. The complete data transfer takes about two hours.
Smart Clock downloads Time information from the local PBS affiliate when the set is turned
off. Both the Smart Clock and Guide Plus must be set up in the menu before they will work.
Sets with Guide Plus and Smart Clock are required to keep the power supply turned On, to
supply power to the Tuner and IF circuitry while downloading information. Guide Plus and
Smart Clock download information while the set is turned off. To accomplish this, the
Microprocessor, IC300, Pin 52, remains low, when the set is turned off to keep the Power
Supply turned on. The HS line on Pin 2 of IC300 outputs a Low, turning Transistor Q403 Off.
This removes the Low from the base of Q400, which keeps it turned off, during normal
operation. Q400 is now turned on by the 5 volt Standby Supply through resistors R433 and
R429. This turns Q400 On, switching resistor R482 to Cold ground putting it in parallel with
R454 and R455. This changes the biasing of the feedback circuit for the 130 volt source. This
biasing change causes the 130 volt source to increase to approximately 145 volts. Since the
load is removed from the 130 volt supply, it is necessary to increase the output voltage to 145
volts to maintain the secondary voltages, 15 volt, 9 volt, -32 volt, 32 volt and the Audio Power
Source at the correct voltage.
In addition, the Low on IC300, Pin 2, also turns off transistor Q635 in the Horizontal drive
circuit. This removes the pull up resistor, R624 from the Horizontal Drive Circuit. This allows
Pin 8 of IC600 to go high removing Horizontal Drive. With no Horizontal Drive, Q501
(Figure
Содержание PTV800
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Страница 19: ...Cabinet Replacement Parts Lists Cabinet Exploded View ...
Страница 130: ...USED ONLY IN MODELS 1152980001 8P4831C 8P4834C 8P5431C 8P5434C 8P6031C 8P6034C 7573 PTV 800 805 WIRING DIAGRAM ...
Страница 131: ...USED ONLY IN MODELS 8P4841C 8P4844C 8P5441C 8P5444C 8P6041C 8P6044C 8P6051C 8P6054 7573 PTV 810 811 WIRING DIAGRAM ...
Страница 132: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 PTV 815 820 825 WIRING DIAGRAM ...
Страница 146: ...All Models 7573 LARGE SIGNAL PANEL APD019 APD020 APD021 SECTION 1 SCHEMATIC ...
Страница 147: ...All Models 7573 LARGE SIGNAL PANEL APD019 APD020 APD021 SECTION 2 SCHEMATIC ...
Страница 148: ...All Models 7573 LARGE SIGNAL PANEL APD019 APD020 APD021 SECTION 3 SCHEMATIC ...
Страница 149: ...All Models 7573 DIGITAL CONVERGENCE PANEL A10688 SECTION 1 SCHEMATIC ...
Страница 150: ...All Models 7573 DIGITAL CONVERGENCE PANEL A10688 SECTION 2 SCHEMATIC ...
Страница 151: ...All Models 7573 DIGITAL CONVERGENCE PANEL A10688 SECTION 3 SCHEMATIC ...
Страница 152: ...All Models 7573 RED CRT PANEL SCHEMATIC ...
Страница 153: ...All Models 7573 GREEN CRT PANEL SCHEMATIC ...
Страница 154: ...All Models 7573 BLUE CRT PANEL SCHEMATIC ...
Страница 156: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 WALLVISION SWITCH PANEL SCHEMATIC ...
Страница 157: ...NOT USED IN MODELS 1152980001 8P4831C 8P4834C 8P5431C 8P5434C 8P6031C 8P6034C PV5470 PV6070 XV5270 7573 SVM SCHEMATIC ...
Страница 158: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 STEREO SPREAD MODULE SCHEMATIC ...
Страница 159: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 GUIDE PLUS SCHEMATIC ...
Страница 160: ...All Models 7573 IR RECEIVER ASSEMBLY SCHEMATIC ...
Страница 161: ...All Models 7573 SWITCH PANEL SCHEMATIC ...
Страница 162: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C PV5470 PV6070 7573 REMOTE LOCATOR SCHEMATIC ...
Страница 168: ...All Models 7573 LARGE SIGNAL PANEL CBA TOP VIEW ...
Страница 169: ...All Models 7573 LARGE SIGNAL PANEL CBA BOTTOM VIEW ...
Страница 170: ...All Models 7573 DIGITAL CONVERGENCE PANEL CBA TOP VIEW ...
Страница 171: ...All Models 7573 DIGITAL CONVERGENCE PANEL CBA BOTTOM VIEW ...
Страница 172: ...All Models 7573 RED CRT PANEL CBA TOP VIEW ...
Страница 173: ...All Models 7573 RED CRT PANEL CBA BOTTOM VIEW ...
Страница 174: ...All Models 7573 GREEN CRT PANEL CBA TOP VIEW ...
Страница 175: ...All Models 7573 GREEN CRT PANEL CBA BOTTOM VIEW ...
Страница 176: ...All Models 7573 BLUE CRT PANEL CBA TOP VIEW ...
Страница 177: ...All Models 7573 BLUE CRT PANEL CBA BOTTOM VIEW ...
Страница 180: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 WALLVISION SWITCH PANEL CBA TOP VIEW ...
Страница 181: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 WALLVISION SWITCH PANEL CBA BOTTOM VIEW ...
Страница 184: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 STEREO SPREAD MODULE CBA TOP VIEW ...
Страница 185: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 STEREO SPREAD MODULE CBA BOTTOM VIEW ...
Страница 186: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 GUIDE PLUS CBA TOP VIEW ...
Страница 187: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C XV5270 PV5470 PV6070 7573 GUIDE PLUS CBA BOTTOM VIEW ...
Страница 188: ...All Models 7573 IR RECEIVER ASSEMBLY CBA ...
Страница 189: ...All Models 7573 SWITCH PANEL CBA ...
Страница 190: ...USED ONLY IN MODELS MX5472C MX6072C MX6472C PV5470 PV6070 7573 REMOTE LOCATOR CBA ...
Страница 192: ...CABINET EXPLODED VIEW ...
Страница 193: ...CRT LENS ASSEMBLY EXPLODED VIEW ...
