User manual ZENITH HPK20E35DT SERVICE MANUAL

[. . . ] SERVICE MANUAL Product Type: Chassis: Manual Series: Manual Part #: Model Line: Product Year: Commercial Directview TV CL SR24 923-03508 E 2002 Model Series: H20E35DT HPK20E35DT HW20E35DT H25E34Y H25E35DT HW25E35DT H25E39Y H27E35DT HPK27E35DT H27E35S H27E35DT8 H27E35S8 H32E35DT CONTENTS Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The sets turn off when channel scan buttons are being used. In position 1, the set will turn off between auxiliary and lowest channel. In position 2, the set will turn off between auxiliary and FM. In position 3, the set turns off after an FM station scan. In scan modes 1and 3 the power On/Off could be changed with Start Ch SM=1 to Start channel. Scan Mode Characteristics 0 TV, VCR3, VCR4 , AUX 1 TV, VCR3, VCR4, AUX, ON/OFF 2 TV, VCR3, VCR4, FM , AUX 3 TV, VCR3, VCR4, FM, AUX, ON/OFF 17 TEXT MODE: Turns text mode on or off in the users menu. 2-1 CL - SERVICE MENU SERVICE MENU 00 FACT MENU: Use SELECT UP and DOWN Keys to select item 00, the Factory Mode. This item is used by the Factory when the module is being tested. In the field, this item should always be left off (Zero is off). When this item is off, only the first twenty-four items in the Installer's Menu can be accessed. They appear one at a time near the middle left of the screen. When this item is set to 1, 91 or 92 (Healthview) menu items are available. In the Factory Menu, only the selected menu item is displayed, near the top of the screen. 1390 - 06 Microcontroller part number 1. 57 Program Revision 01 Font Revision 03HPos9 Factory Option Build Date 10/05/02 TE Status TE=10110000 In the Factory Menu, only the selected menu item is displayed, near the top of the screen. When the Factory Menu is on, the AC Power-On feature is always enabled regardless of the setting of AC ON in the Installer's Menu. The TV set will automatically come on when AC is applied. Use the remote to reenter the Installer's Menu to turn the Factory Menu off. The Factory Mode may also be turned off by setting the clock, or running the Auto Program feature in the customer Set Up menu. 01 PRESET PX: Stores the video customer menu adjustments in the nonvolatile memory of the EAROM. Settings for Contrast, Brightness, Color and Tint are stored in this manner. 02 PRESET AX: Stores customer Audio menu adjustments in the nonvolatile memory of the EAROM. Settings for Bass, Treble, Balance and SoundRite are stored in this manner. 0 is custom and 1 is Preset stored. 1-7 is the length of time (in hours) that the set will continue to operate if unattended. [. . . ] 3 RADIO/TV-SWITCH R4200 10K L4205 10µH C4250 100µF 16V H20E35DT H25E34Y H25E35DT H25E39Y H27E35DT HPK20E35DT HPK27E35DT HW20E35DT HW25E35DT H32E35DT B A SR24 - 923-03508 CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER "X" IN THEIR COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED. 6-9 ALL SYMBOLS WITH "M" ON END OF DESIGNATOR INDICATE SURFACE MOUNTED COMPONENT CL SHEET 9 AV Switch Circuit (20-27") 1 G +9V SWY C Q2901 E 0TR945009AA B RM2908 100 JM2901 0. 1 RM2905 10K C2932 390pF R2932 75 ZD2905 103-ZENER-PROV 1/2W Q2904 P/L E C2916 470µF 16V +9V SWY RM2928 C B JM2902 PROV RM2947 150 100 CM2928 220pF 50V W2934 W2933 +9V 5W CM2934 SMD-PROV +9V SW L2903 10µH +9V SWY 2 3 4 5 6 7 8 9 10 C2905 PROV C2906 100µF 16V 29 WF F Y-MAIN Y-MAIN CM2908 100pF 50V RM2909 150 RM2910 P/L Sht. 6 C-MAIN IC2900 221-1438 +9V SWC C Q2902 P/L E RM2913 150 RM2914 150 JM2904 0. 1 C2909 RM2912 10K B RM2911 100 4 LTV 5 TV 6 RTV C2910 10µF 50V 1/2W +9V SWF R2924 1K Q2906 0TR733009AA E RM2952 B 100 C RM2954 0. 1 DATA C-MAIN Sht. 6 MATRIX-OUT M-OUT +9V SWC TV 1 YOUT1 2 GND 3 COUNT1 TRAP 48 RM2938 L2904 CM2920 SMD-PROV RM2937 0. 1 RM2934 RM2935 10K 28 CV-SW Data C Out Chroma (C-IN) SMD-PROV COIL-PROV 1/2W E Sht. [. . . ]