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Zenith H19F34DT Series Service Manual - Overview

Other manuals for H19F34DT Series: Installation And Operating Manual, Warranty

Summary of H19F34DT Series

  • Page 1

    Service manual service manual product type: chassis manual series: manual part #: model line: product year: model series: contents general information/remote controls................................ Installer ’s menu ............................................................ Servicing/trobleshooti...

  • Page 2

    Important safety notice this manual was prepared for use only by properly trained audio-visual service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from zenith electronics corporation. All components should be r...

  • Page 3

    X-radiation to prevent possible exposure to x-radiation caused by excessive crt anode voltage, the cl chassis incorporate a “high voltage shut- down” circuit. This circuit senses the level of a flyback pulse from the “flyback transformer” representative of the actual high voltage on the crt anode. W...

  • Page 4: Table Of Contents

    Table of contents section 1......General info product safety servicing guidelines i~ii introduction ........................ 1-1 overview ........................ 1-1 interfaces .......................... 1-2 superport - mpi ................. 1-2 multiple protocol interface ...... 1-2 ebc (edge boar...

  • Page 5: Overview

    Sr25-3828vd0171b 1-1 cl - overview overview 1 sh iel d fx3 40 0 introduction this manual covers the cl chassis commercial sets. All suffix 36 models have stereo, surround, mpi, and super video ports. The cl series chassis features nine ics for all signal, sync, and sweep processing. Icm2200 -audio/v...

  • Page 6: Overview (Continued)

    Sr25-3828vd0171b 1-2 cl - overview overview (continued) interfaces camport some models have video and right/left audio input jacks at the front of the receiver. These jacks can be used to view videotapes from a vcr or camcorder. When the video cable is plugged into the jack, the shorting jumper j1 o...

  • Page 7: Overview (Continued)

    Sr25-3828vd0171b 1-3 cl - overview overview (continued) connection center on back of tv the connection center on the rear of the tv allows for connection of the viewing source. The diagrams list the use of each jack on the connection center. 1. Antenna/cable jack use the jack for 75-ohm antenna-type...

  • Page 8: Remote Control

    Sr25-3828vd0171b 1-4 cl - overview remote control mute press to turn off sound while picture remains. Press again to restore sound. Flshbk press to return to last tv channel you were watching. Channel up/down press to select a tv channel by going up/down through channels programmed in the tv memory....

  • Page 9

    Sr25-3828vd0171b 1-5 cl - overview lt2000 & lt2002 clone programmer note: a slowly flashing green light indicates there is a problem with the communications between tv and programmer. In this case, check for damaged cable, poor contacts, or other connection problems. If the status indicator is red, ...

  • Page 10

    Sr25-3828vd0171b 1-6 cl - overview lt-2000 & 2002 clone programmer using the on-screen menu, select a memory or return to the main selection menu. Then press on/off, power, or enter to activate the selection. The next screen allows for one last opportunity to check the versions of tv and clone setup...

  • Page 11: User Menus

    Sr25-3828vd0171b 1-7 cl - menus user menus setup menu press the menu key on the installer’s remote repeatedly so that the setup menu appears on the screen. Language captions clock set ch. Labels add/del/blnk setup menu auto program to program timer auto program using the up/down arrows on the remote...

  • Page 12: User Menus (Continued)

    Sr25-3828vd0171b 1-8 cl - menus user menus (continued) clock set press menu repeatedly to show the setup menu. Use the up/down arrows to highlight clock set. Set the current time; use the number keypad to enter the hours, then minutes. For example, enter 06, then 30, to set 6:30 on the clock. Use th...

  • Page 13: User Menus (Continued)

    Sr25-3828vd0171b 1-9 cl - menus user menus (continued) in the language menu, use the right/left arrow to choose one of the following options: english, spanish, or french. Press enter to return to tv viewing. Audio menu press menu repeatedly on the remote control until the audio menu appears. Treble ...

  • Page 14: User Menus (Continued)

    Sr25-3828vd0171b 1-10 cl - menus user menus (continued) press enter to return to tv viewing, or press the up / down arrows to change other options in the video menu. Parental control this optional feature can be used to prevent (block) unwanted programming from appearing on your tv. Parental control...

  • Page 15: User Menus (Continued)

    Sr25-3828vd0171b 1-11 cl - menus user menus (continued) tv parental guideline rating system g general audiences content not offensive to most viewers. Tv-g general audience considered suitable for all audiences; children may watch unattended. Tv-pg parental guidance unsuitable for younger children, ...

  • Page 16: User Menus (Continued)

    Sr25-3828vd0171b 1-12 cl - menus user menus (continued) captions display pressing cc in quick mode shows the current caption selection, or caption off: 1 caption is on cc in the standard mode, it displays all the captions and text mode selections as below: caption 1 caption 2 text 1 caption 3 captio...

  • Page 17

    Sr25-3828vd0171b 2-1 cl - installers menu model series 34/36/39 installers menu section 2 installers menu adjustments note: there are two microcontrollers available for the 39 series: oimcrm1039a and oimcrm1039b. To access the installer's menu, press and hold the menu key until the user menu display...

  • Page 18

    Sr25-3828vd0171b 2-2 cl - installers menu model series 34/36/39 installers menu (continued) 4-i strt channel : determines the channel that is se- lected automatically each time the tv is turned on. Range is 0-255. 0 is the aux position and 255 is off. Use ad- just to change the channel number. This ...

  • Page 19

    Sr25-3828vd0171b 2-3 cl - installers menu model series 34/36/39 installers menu (continued) 20-i feature level : default set to zen 1 for zenith ir remote control operation. Set o, p lbl for zenith private label ir remote control operation. Warning: do not set to "0" or remote will not control tv. 2...

  • Page 20

    Sr25-3828vd0171b 2-4 cl - installers menu model series 34/36/39 installers menu (continued) 45-i not used 46-i strt aux srce : determines the aux that is selected automatically each time the tv goes to the aux channel. There are 3 possible values depending on the enables switches. 0 is the camport p...

  • Page 21

    Sr25-3828vd0171b 2-5 cl - installers menu model series 34/36/39 installers menu (continued) 74-i ch-time size : when set to 1 and transparent back- ground is selected for channel-time display, (foreground color = background color and custom color enabled) a large channel number is displayed instead ...

  • Page 22

    Sr25-3828vd0171b 2-6 cl - installers menu model series 34/36/39 installers menu (continued) item value range default valdescription 0-i. Installer seq 0-3 0 leave default set to 0. 1-i. Power manage 0-7 0 sets number of hours of no activity before auto shutoff. 2-i. Ac on 0-1 0 set to 1 to enable au...

  • Page 23

    Sr25-3828vd0171b 2-7 cl - installers menu model series 34/36/39 installers menu (continued) item value range default valdescription 51-i. Dis. V-chip m. 0-1 0 set to 1 to disable v-chip (parental control) menu. 52-i. Dis. Source m. 0-1 0 set to 1 to disable source menu. 53-i. Dis. Ch-time m. 0-1 0 s...

  • Page 24

    Sr25-3828vd0171b 2-8 cl - installers menu cl model series 34 & 36 factory menu section 2 factory menu description for series 34 & 36 0-f fact menu : use select up and down keys to select item 00, the factory mode. The factory uses this item when the module is being tested. It has two positions: 0 an...

  • Page 25

    Sr25-3828vd0171b 2-9 cl - installers menu cl model series 34 & 36 factory menu 24-f max contrast : see adjustment range of customer control for contrast. Range is 0-63. Typical value is 63. 25-f trap 3.58 : 0=off & 1=on. Set 1 to normal tv opera- tion. Set to 0 is y/c is being used at chassis with a...

  • Page 26

    Sr25-3828vd0171b 2-10 cl - installers menu cl model series 34 & 36 factory menu item range h25f36dth27f36dth32f36dth19f34dth20f34dth25f34dth27f34dt description 00-f. Fact menu 0-1 0 0 0 0 0 0 0 factory mode, refer to page 2-8 01-f. Preset px 0-1 1 1 1 0 0 1 1 used to store video adjustments 02-f. Pr...

  • Page 27

    Sr25-3828vd0171b 2-11 cl - factory menu cl model series 39 factory menu factory menu description for 39 series. Note: there are two microcontrollers available for the 39 series: oimcrm1039a and oimcrm1039b. 00-f fact menu : use select up and down keys to select item 00, the factory mode. The factory...

  • Page 28

    Sr25-3828vd0171b 2-12 cl - factory menu cl model series 39 factory menu 21-f y dl time aux : luma signal delay time adjustment on aux mode. Range is 0-6. Typically set to 3. 22-f chroma bp-aux : chroma band pass filter for aux mode. 0= bpf is on, 1=take off. Typically set in 0. 23-f aux subtint : hu...

  • Page 29

    Sr25-3828vd0171b 2-13 cl - factory menu cl model series 39 factory menu item range h25f39dt h27f39dt description 00-f. Fact menu 0-1 0 0 factory mode - refer to page 2-11 01-f. Preset px 0-1 1 1 used to store video menu adjustments 02-f. Vert pos 0-30 15 15 moves on screen display vertically 03-f. H...

  • Page 30: Servicing

    Sr25-3828vd0171b 3-1 cl - servicing servicing general information servicing the cl chassis is the same as with other zenith single-board chassis. If the set is dead, first check the standby and switched voltages. If the switched voltages do not appear, check the power “on” circuit. If the power supp...

  • Page 31

    Sr25-3828vd0171b 3-2 cl - servicing service adjustments (continued) microprocessor check the following: ir in on pin 15 +5 volts on pins 27 and 18 serial data, serial clock on pins 36 and 38 reset at pin 30 horiz. Sync at pin 1, vertical sync at pin 2 r out at pin 52, g out at pin 51 and b out at pi...

  • Page 32

    Sr25-3828vd0171b 3-3 cl - servicing components. After replacement is made, confirm proper anode voltage using the following procedure. Measurement of the crt anode voltage must be performed using a high impedance-high voltage meter, with no raster on the screen, and operating at normal horizontal fr...

  • Page 33

    Sr25-3828vd0171b 3-4 cl - servicing if servicing video detector if there is no viewable picture on screen, access the service menu and check default settings for the following items: #5 rf adj should be at least 30. #6 vif vco adj set to 63. Tune in a good off-the-air signal. Place a high- impedance...

  • Page 34

    Sr25-3828vd0171b 3-5 cl - servicing service adjustments (continued) switching process video switching is done between the cv inputs and the y/c inputs. There are three cv signals to consider: camport video enters at pin 7 of ic2901. Rear video enters at pin 5 of ic2901. If video enters at tv pin 12 ...

  • Page 35

    Sr25-3828vd0171b 3-6 cl - servicing preliminary setup 1. Allow the receiver to warm up for 15 to 20 minutes. 2. Degauss the crt. 3. Connect a crosshatch generator to the receiver and “rough in” the static (center) convergence. Follow the convergence procedure. 4. Adjust for best focus. Purity adjust...

  • Page 36

    Sr25-3828vd0171b 3-7 cl - servicing vertical-tilt wedge adjustment the vertical lines at 6 and 12 o’clock are converged by vertically tilting the yoke and inserting a wedge at the top of the yoke until it is firmly seated between the crt glass and the horizontal coils. Horizontal-tilt wedge adjustme...

  • Page 37: Model Parts

    Model parts sr25-3828vd0171b 4-1 cl - model parts parts all cl models are module level repair only. Parts contact informa- tion is below: voice: 1-888-3-zenith fax: 1-888-6-zenith mail: zenith national parts p o box 240007 huntsville, al 35824-6407 item number part description item number part descr...

  • Page 38: Model Parts

    Model parts sr25-3828vd0171b 4-2 cl - model parts item number part description item number part description 4810v00739a cabinet tray 4810v00739a cabinet tray 3091v00b66a cabinet front 3091v00b66a cabinet front 3809v00332a back cover asse (cabinet rear) 3809v00332a back cover asse (cabinet rear) 6140...

  • Page 39: Model Parts

    Model parts sr25-3828vd0171b 4-3 cl - model parts item number part description 4810v00739a bracket, jack pack 3091v00b80a cabinet front 3809v00b07a back cover asse (cabinet rear) 6140vc8003b coil, degaussing 5016v20002a magnetic, stick ferrite (convergence helper) 3790v00711a crystal window 3828va0a...

  • Page 40

    Ref description h19f34dt 1 front cabinet (cabinet assembly) 3091v00b81b 2 speaker (speaker full range) 6400vsnx01a 3 keyboard assembly 3141vsnc61a 4 ir lens 3790v00712a 5 cpt & yoke assembly 6335v20a03a 6 rear cabinet (back cover assembly) 3809v00b08b 7 main module (chassis assembly) 3141vmnp44a 8 r...

  • Page 41

    I a c p o t n o v l o v l ch ch wer po ch preview timer alarm te mu b h s fl k power v lum o e l nne cha cc 0 9 8 7 6 5 4 3 2 enter 1 ref description h20f34dt 1 front cabinet (cabinet assembly) 3091v00485a 2 speaker (speaker full range) 6400vesu01a 3 keyboard assembly 3141vsnc61b 4 ir lens 3790v0071...

  • Page 42

    3 4 2 1 5 6 7 8 ch pr e vie w time r alar m te mu l h f s b k r p owe vol m u e l c ha n e n c c 0 9 8 7 6 5 4 3 2 e nt e r 1 8 cl commercial 24”exploded view 5-3 cl exploded view sr25 - 3828vd0171b ref description h24f34dt h24f36dt h24f39dt 1 front cabinet (cabinet assembly) 3091v00b80a 3091v00b80a...

  • Page 43

    3 4 2 1 5 6 7 8 ch preview timer alarm te mu l h f s bk r powe vo l m u e l cha ne n cc 0 9 8 7 6 5 4 3 2 enter 1 cl commercial 25”exploded view 5-4 cl exploded view 8 ref description h25f34dt h25f36dt h25f39dt 1 front cabinet (cabinet assembly) 3091v00b80a 3091v00b80a 3091v00b80a 2 speaker (speaker...

  • Page 44

    7 3 4 2 1 6 5 ch preview timer alarm t u e m h fls bk o e p w r vo l e um ha l c nne cc 0 9 8 7 6 5 4 3 2 enter 1 cl commercial 27”exploded view 5-5 cl exploded view 8 sr25 - 3828vd0171b ref description h27f34dt h27f36dt h27f36s h27f39dt 1 front cabinet (cabinet assembly) 3091v00b66a 3091v00b66a 309...

  • Page 45

    1 2 3 4 5 6 7 8 ch preview timer alarm m e ut h f s k l b o r p we v m olu e el chan n cc 0 9 8 7 6 5 4 3 2 enter 1 cl commercial 32”exploded view 5-6 cl exploded view ref description h32f36dt 1 front cabinet (cabinet assembly) 3091v00b56a 2 speaker (speaker full range) 6400vsnx01a 3 keyboard assemb...

  • Page 46

    Deg-ctrl pwr-ctrl +11lsp +11 lsp +vm +12 vsb +12vsb +12 vsb +12 vsb +12hdr +12 hdr +vm +vm +12 vsb +vl sw +8v +14vsb +14 vsb +vl +12 vsb +vl +vl +13vaud aud +13v +14vaud aud +14v vsb +14v sw +8v +9vsw sw +9v +5vsw sw +5v +8.7vsb vsb +8.7 +8vsw +8v sw +5vsb +5 vsb +12 vsb sw +9v ve ve +5vtnr tnr +5v ...

  • Page 47

    Ir-data mute ctrl-y/c v-sync sda y-micro sync h-sync afc camport-sense scl horz-size y /c -s e n s e deg-ctrl pwr-ctrl b r fastblank if s h u td o w n ctrl-tv/aux ctrl-f/r g ir-data agc camport-sense if horz-size flyback b scl sda deg-ctrl pwr-ctrl fastblank r g sync afc vert-drive ir-data agc signa...

  • Page 48

    Wf4 wf3 wf6 wf5 wf8 wf7 horz-drive shutdown abl horz-size vertical-abl vnfb flyback vert-drive +5v sbf +35v +35v +35v +12 hdr +33v +33v +28v b+ +35v +35v +12 hdr +215v +215v +5v sbf +28v +25v +28v cx3251 50v 5.6µf cx3254 500v 470pf q3250 e b c 0tr322809aa ktc3228-0 q3201 e b c ksc945c-y 0tr945009aa ...

  • Page 49

    Wf11 wf10 wf9 wf12 wf13 wf15 h-sync v-sync f s c f s c sif sif (( (( ( ( ( ( g g r r b b y-micro vertical-abl abl afc vert-drive vnfb flyback horz-drive sync h-sync v-sync b g r fastblank sda scl fsc if sif agc signal-meter ext-aud comp-aud tv y-main c-main gnd d gnd a gnd a gnd b gnd b gnd b gnd b ...

  • Page 50

    Sda scl audio-amp-right audio-amp-left sw +9v +8.1vaud +8.1v aud aud +8.1v aud +8.1v aud +8.1v sw +9v +5v tnr +5v tnr c1420 50v 3.3µf l1400 15µh c2807 16v 100µf c2800 50v 1µf c2801 50v 1µf 17 18 19 34 35 36 37 38 39 20 21 22 23 24 25 16 15 nc 28 29 nc 30 31 32 33 26 27 adr_ws adr_da 14 46 45 44 43 4...

  • Page 51

    Sr25-3828vd0171b y/c-sense camport-sense tv aux-left-y/c aux-right-vid aux-left-vid c-main y-main ctrl-y/c ctrl-tv/aux ctrl-f/r aux-right-y/c matrix/speaker-out cv-comb luma-comb chroma-comb aud-left-front aud-right-front swf +9v +9vswf +9v swf swf +9v swf +9v swf +9v sw +9v sw +9v l2471 p/l l2900 1...

  • Page 52

    Prov 5 6 1 2 3 4 e b c e b c 11 10 9 8 5 6 7 1 2 3 4 e b c 11 10 9 8 5 6 7 1 2 3 4 e b c mpi_data_in ir_data mpi_data_out clonesense_pty_select rj11_pin4 gnd gnd buffer_ir_data mpi_data_in_buffered +11v mpi_data_out_buffered 470k +11v 220 1k 3.3k 22k 470 470 +11v 078-3481-01 sbf +5v sbf +5v 16v 100u...

  • Page 53

    E b c e b c e b c 9 8 5 6 7 1 2 3 4 e b c 12 11 10 9 8 7 6 5 4 1 g2 3 9 8 7 6 5 4 1 g2 0 -0.4 0 3.69 4.0 126.7 3.65 4.0 128.5 128.2 4.0 3.6 amp red amp green amp blue wire to sweep red red f il a m e n t o s filamentos blue blue g1 g1 g2 g2 green green red green blue 2 150 1/2w 0.01 2kv 2 220pf 50v ...

  • Page 54

    8 9 10 6 7 5 1 2 3 4 11 10 9 8 7 5 6 1 2 3 4 8 9 10 6 7 5 1 2 3 4 11 10 9 8 7 5 6 1 2 3 4 11 10 9 8 7 5 6 1 2 3 4 11 10 9 8 7 5 6 1 2 3 4 mpi_data_in mpi_data_in +5vba +5vba +5vba ps_gnd ps_gnd mpi_dout y/c_gnd c-in buffered_mpi_din y-in vertical_sync horizontal_sync video_gnd green_video_in blue_vi...

  • Page 55

    Audio-amp-right audio-amp-left matrix/speaker-out mute comp-aud gnd gnd gnd gnd gnd gnd gnd aud +14v gnd gnd gnd gnd gnd aud +13v gnd gnd gnd q800 e b c ksc945c-y 0tr945009aa 1 2 3 cn9m4 366-921b 1 2 3 4 cn9s4 366-921c c824 50v 0.1 c814 0.1 50v c825 25v 470µf c800 25v 100µf c802 25v 1000µf c811 50v ...

  • Page 56

    Cv-comb luma-comb chroma-comb fsc sw +8v sw +8v sw +8v sw +9v +5vcmb +5v cmb cmb +5v cmb +5v cm2400 prov 50v l2401 100µh l2403 100µh l2405 10µh w2450 p/l q2400 e b c 0tr945009aa ksc945c-y c2409 16v 47µf c2412 16v 47µf c2414 16v 47µf c2410 16v 47µf q2403 e b c 0tr945009aa ksc945c-y cm2424 prov 50v q2...

  • Page 57

    Aft out saw vif in if in 63 64 2 45 46 rf agc out delay adj rf agc 59 if agc vif amp vco video det apc det vif vco adj defeat aft out aft gamma black stretch gamma black stretch clamp sharpness video tone delay y sw lpf lpf f. Trap chroma trap vco adj acl/abcl y-sw out 31 33 x2 41 video mute video m...

  • Page 58

    _a _v _a_v _a_v _a_v c n 4r 8 th x39 01 cx 340 5 c n 4t 8 g56 g57 g54 g55 br x3 40 0a + ~ ~ - br x3 40 0 + ~ ~ - c x 34 04 th x39 02 1 dx 360 0 g44 g43 g42 w 1 k x 39 00 r x 35 00 q x 35 00 e b c g10 c 32 04 tu 12 40 fb 360 1 fb 36 01 a fb 36 00 a fb 360 0 w2 r x 36 05 d x 36 02 d x 36 01 rx 360 3 r...

  • Page 59

    Pcb bottom layout c n 4 r 8 1 thx3901 cx3405 c n 4 t 8 1 brx3400a + - ~ ~ brx3400 + - ~ ~ c x 3 4 0 4 1 thx3902 dx3600 » w 1 kx3900 r x 3 5 0 0 q x 3 5 0 0 e b c c 3 2 0 4 1 tu1240 fb3601 fb3601a fb3600a fb3600 w2 6 0 5 r x 3 dx3602 » d x 3 6 0 1 » rx3603 r x 3 6 0 4 r x 3 6 0 1 cx3215 w 5 c x 3 2 0...

  • Page 60

    1 1 1 c b e c b e b c e b c e b c e 1 1 v g a 1 0 1 c b e 1 1 1 b c e 1 e d g e t a r g e t c r t 1 r5 12 9 w 0 1 6 5 c r t 2 w0160 w0166 c4965 c 4 9 6 6 c4967 c 4 9 4 6 6e2 11e1 m p i r 4 9 9 7 r 4 9 9 3 r 4 9 9 2 r4 99 0 r 4 9 9 1 r 4 9 9 6 c 5 1 0 7 r 4 9 8 7 c 5 1 0 4 c 5 1 1 0 r 4 9 8 3 w3 l 5 ...

  • Page 61

    R4989m r 4 9 8 6 m r 4 9 9 5 m r 4 9 8 5 m r4994m c5 10 5m c5 11 8m c5 10 3m c5 10 6m c 5 1 0 9 m c 5 1 0 2 m r5 12 4m r5 11 8m r5 10 9m r5 10 6m r5 11 3m r5 12 1m r5 10 5m r5 11 2m r5 12 0m r5 10 8m r 5 1 1 7 m r 5 1 0 2 m r 5 1 0 1 m pcb bottom layout critical safety components are identified by t...

  • Page 62

    Z e n i t h.