This revised edition replaces the original CA Service Manual (923-03396) and the first addendum (923-03396A1).SERVICE MANUALProduct Type: Consumer Col

CM151 1-4 CA - REMOTESMBR3345Z MODEL REMOTE CONTROLtvvcrCCpowerf.fwd.rewplayStopentercablevolumechannelmuteflshbackmenu quitrecordprgtv / vcrsourcepau

CM151 5-12 CA - EXPLODED VIEWS25/27V Console Set Exploded View12854673MBR3447Z124-00233REF DESCRIPTION B25A76R B27A76R B27A76R51 ESCUTCHEON 057-09067-

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CM151 1-5 CA - REMOTESMBR3346Z MODEL REMOTE CONTROLtvvcrPIPpowerf.fwd.rewplaystopentercablevolumechannelmuteflshbackmenu quitrecordprgtv / vcrsourcepa

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIRCOMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.ALL SYMBOLS WITH

CM151 1-6 CA - REMOTESMBR3447Z MODEL REMOTE CONTROLFLASHBK (Flashback)Returns to previous Channel.POWERTurns TV On or Off.MODESelects the remote'

CM151 1-7 CA - REMOTESMBR3457Z MODEL REMOTE CONTROLFLASHBK (Flashback)Returns to previous Channel.POWERTurns TV On or Off.MODESelects the remote'

CM151 1-8 CA - REMOTESPROGRAMMING THE MBR3447 AND MBR3457Z REMOTESIf you’re using Zenith products, the remote is alreadyprogrammed for most common cod

CM151 1-9 CA - REMOTESDaewoo 148Emerson 158Funai 154Goldstar 153Hitachi 154LXI 154Magnavox 173, 181Panasonic 174RCA 179Samsung 180Sansui 182Sharp 179S

CM151 1-10 CA - 1384 MENUSUSER MENUS 221-1384SETUP MENUThe Setup Menu for CA chassis with its options for eachitem are described as follows:AUTO PROGR

USER MENUS 221-1384 (continued)CM151 1-11 CA - 1384 MENUSSLEEP TIMERTo set the Sleep Timer use the Left/Right Arrow keys toselect a time. Then use th

CM151 1-12 CA - 1384 MENUSUSER MENUS 221-1384 (continued)CONTENT BLOCKUse the Left/Right Arrow keys to select the Content BlockMenu.DIALOG BLOCKTo blo

USER MENUS 221-1384 (continued)CM151 1-13 CA - 1384 MENUSWhen captions are being displayed, if one of the VolumeUp/Down keys is pressed, the volume b

IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-visual servicetechnicians.When servicing this product, under no

CM151 1-14 CA - 1384 MENUSUSER MENUS 221-1384 (continued)TV PARENTAL GUIDELINE RATING SYSTEMG General Audiences Content not offensive to most viewers.

CM151 1-15 CA - 1385 MENUSUSER MENUS 221-1385SETUP MENUShown below is the Setup Menu for CA (A24) chassiswith its options for each item which are desc

CM151 1-16 CA - 1385 MENUSUSER MENUS 221-1385 (Continued)CAPTIONSThis feature allows the customer to select: On, CaptionWhen Muted or Off options.To

CM151 1-17 CA - 1385 MENUSUSER MENUS 221-1385 (Continued)Notes:• When the channel label is selected (see 1-20 forlabels), then the Auto channel label

CM151 1-18 CA - 1385 MENUSUSER MENUS 221-1385 (Continued)LOCK ON/OFFThis item turns the Parental Control feature On / Off.The PC feature can only be t

CM151 1-19 CA - 1385 MENUSUSER MENUS 221-1385 (Continued)SOUND RITEThe Sound Rite feature is used to obtain a uniformvolume level, particularly while

CM151 1-20 CA - 1385 MENUSUSER MENUS 221-1385 (Continued)TV PARENTAL GUIDELINE RATING SYSTEMG General Audiences Content not offensive to most viewers.

CM151 1-21 CA - 1386 MENUSUSER MENUS 221-1386SETUP MENUBelow is the Setup Menu for the CA Domestic (A30)chassis with each of its options described be

CM151 1-22 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)CLOCK SETWhen no time is set, the display shows: —:— —There are two ways to set the time:1. D

CM151 1-23 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)AUDIO MODEThis feature allows the customer to change the audiomode to either Stereo or Mono b

HIGH VOLTAGE AND X-RADIATION PROTECTIONA potential source of x-rays is the picture tube, if the highvoltage (HV) is out of specification. When the HV

CM151 1-24 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)To change the channel while adjusting channel labels,use the Channel Up/Down keys, or press t

CM151 1-25 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)SET HOURSUse the Left/Right Arrow keys to adjust the number ofhours the Parental Control feat

CM151 1-26 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)AUTO DEMOThe Auto Demo is designed to “show-off” the icon menusand other icon displays on the

CM151 1-27 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)SOURCE MENUThis menu has two items, Main Source and PIP Source.The selection of either Main S

CM151 1-28 CA - 1386 MENUSUSER MENUS 221-1386 (Continued)TV PARENTAL GUIDELINE RATING SYSTEMG General Audiences Content not offensive to most viewers.

CM151 1-29 CA - 1387 MENUSUSER MENUS 221-1387SETUP MENUShown below is the Setup Menu for CA (A34) chassiswith its options for each item which are desc

CM151 1-30 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)Entering an invalid time (“0” for example) will result inthe clearing of the current time (—:

CM151 1-31 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)ON/OFF TIMERThis feature consists of three menu lines: “On Time”,“Off Time”, and “On/Off Tim

CM151 1-32 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)CHILDREN BLOCKTo block channels for children, select either: Unblocked,TV-Y and Above or TV-Y

CM151 1-33 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)EZ HELP MENUThe special features EZ Help option may be accessedusing the Left/Right Arrow key

- iii -

CM151 1-34 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)EZ SOUNDThe EZ Sound Control has six selections the customercan select. The selections avail

CM151 1-35 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)CH 5ABC10:06 AMMONOMAIN SOURCEThe selection of Main Source determines the signal thatfeeds th

CM151 1-36 CA - 1387 MENUSUSER MENUS 221-1387 (Continued)TV PARENTAL GUIDELINE RATING SYSTEMG General Audiences Content not offensive to most viewers.

CM151 2-1 CA - INSTALLER MENUSSERVICE MENU ADJUSTMENTSAccessing the Service Menu can only be accomplishedby using the remote control. Press and hold

CM151 2-2 CA - INSTALLER MENUS01 PRE PX: Stores customer menu adjustments in thenonvolatile memory of the EAROM. Selections are Custom/Preset-Store. S

CM151 2-3 CA - INSTALLER MENUSINSTALLERS MENU 221-1384 (continued)CA CONSUMER CHASSISFACTORY MENU RECOMMENDED SETTINGSITEM RANGE 25” 27” DESCRIPTION00

CM151 2-4 CA - INSTALLER MENUS01 PRE PX: Stores customer menu adjustments in thenonvolatile memory of the EAROM. Selections are Custom/Preset-Store. S

CM151 2-5 CA - INSTALLER MENUSCA CONSUMER CHASSISFACTORY MENU RECOMMENDED SETTINGSITEM RANGE 25” 27” 32” 36” DESCRIPTION00 F MODE 0-1 0 0 0 0 Factory

CM151 2-6 CA - INSTALLER MENUSINSTALLERS MENU 221-138601 PRE PX: Used to store the customer menu adjustments inthe non-volatile memory of the EAROM .

CM151 2-7 CA - INSTALLER MENUSINSTALLERS MENU 221-1386 (continued)CA CONSUMER CHASSISFACTORY MENU RECOMMENDED SETTINGSITEM RANGE 25” 27” 32” 36” DESCR

TABLE OF CONTENTSSECTION 1 GENERALOVERVIEW ... 1-1MODEL INFORMATION ...

CM151 2-8 CA - INSTALLER MENUSINSTALLERS MENU 221-138701 PRE PX: Used to store the customer menu adjustmentsin the non-volatile memory of the EAROM .

CM151 2-9 CA - INSTALLER MENUSINSTALLERS MENU 221-1387 (continued)CA CONSUMER CHASSISFACTORY MENU RECOMMENDED SETTINGSITEM RANGE 27” 32” 36” DESCRIPTI

CM151 3-1 CA - SERVICINGHIGH VOLTAGE AND X-RADIATION PROTECTIONA potential source of x-rays is the picture tube, if thehigh voltage (HV) is out of spe

CM151 3-2 CA - SERVICINGSERVICING (continued)GENERAL INFORMATIONServicing the CA chassis is the same as with other Zenithsingle-board chassis. If the

CM151 3-3 CA - SERVICINGComposite Audio out at pin 2Horizontal Drive at pin 32Vertical Drive at pin 24Video output Blue at 2C5 pin 3Video output Green

CM151 3-4 CA - SERVICINGSERVICE ADJUSTMENTS (continued)PRELIMINARY SETUP1. Allow the receiver to warm up for 15 to 20 minutes.2. Degauss the CRT.3. Co

CM151 3-5 CA - SERVICINGSERVICE ADJUSTMENTS (continued)VERTICAL-TILT WEDGE ADJUSTMENTThe vertical lines at 6 and 12 o’clock are converged byvertically

CM151 3-6 CA - SERVICINGVIDEO DETECTORIf there is no viewable picture on screen, access theService Menu and check default settings for thefollowing it

CM151 3-7 CA - SERVICINGAdjust A ATT register in IC1400 for 490 mVrms (±10mVrms) in TVOUT-L output, pin 44 of IC1400 for MTSmodels and at pin 11 for S

B32A30ZF... 4-8B32A34Z ... 4-9B

CM151 4-1 CA - MODEL PARTSMODEL PARTSSECTION 4MODEL PARTSB25A02ZPart # Description014-12296-17 CABINET FRONT, TV, MOLDED PLASTIC014-12297-08 CABINET R

CM151 4-2 CA - MODEL PARTSMODEL PARTS (Continued)A63AFW38X VACUUM TUBE, CRT, COLOR, 25 INCH DIAGONAL124-00233 SPACE COMMAND, TRANSMITTER, MBR3447Z152-

CM151 4-3 CA - MODEL PARTSMODEL PARTS (Continued)B25A74LKPart # Description002-04084-11 CABINET, BACK, PRESSED WOOD012-10810-01 MOLDED PLASTIC, PANEL,

CM151 4-4 CA - MODEL PARTSMODEL PARTS (Continued)B27A10ZCFPart # Description014-12304-03 CABINET REAR, TV, MOLDED PLASTIC014-12305-08 CABINET FRONT, T

CM151 4-5 CA - MODEL PARTSMODEL PARTS (Continued)F-53039 KEYBOARD ASSY, 6 BUTTON, 27V GB CHASSISA-19058-03 CRT AND YOKE, ASSEMBLY, 27VB27A24ZF5Part #

CM151 4-6 CA - MODEL PARTSMODEL PARTS (Continued)192-00923 LENS, IR194-02665 PAD, PUSHBUTTONS206-03481 INSTR BOOK, OPERATION GUIDEA-18681-01 LINE CORD

CM151 4-7 CA - MODEL PARTSMODEL PARTS (Continued)LGB29A10ZMPart # Description014-12304-03 CABINET REAR, TV, MOLDED PLASTIC014-12305-08 CABINET FRONT,

CM151 4-8 CA - MODEL PARTSMODEL PARTS (Continued)138-01964-02 CABINET GRILLE, CLOTH OVER PLASTIC, LEFT138-01964-03 CABINET GRILLE, CLOTH OVER PLASTIC,

CM151 4-9 CA - MODEL PARTSMODEL PARTS (Continued)012-10858-03 MOLDED PLASTIC, PANEL, JACK PACK, CA CHASSIS014-12284-23 CABINET FRONT, TV, MOLDED PLAST

CM151 1-1 CA - GENERALOVERVIEWSECTION 1OVERVIEWMODEL INFORMATIONBelow is detailed Model information on the CA Chassis series. All CA Models include th

CM151 4-10 CA - MODEL PARTSMODEL PARTS (Continued)012-10858-04 MOLDED PLASTIC, PANEL, JACK PACK, CA CHASSIS014-12284-23 CABINET FRONT, TV, MOLDED PLAS

CM151 4-11 CA - MODEL PARTSMODEL PARTS (Continued)A-18639 CRT ASSEMBLY, WDEFLECTION YOKE AND BEAMBENDER, 36V CTVA-18681-01 LINE CORD ASSY, WITH YEONHO

CM151 4-12 CA - COMPONENTSCOMPONENT PARTS LISTCOMPONENT PARTS LIST REFERENCE CHARTRefer to the chart and Model Identifier to usethe Component parts li

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-13 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

COMPONENT PARTS LISTCritical safety components are identified bythe letter “X” in their component designatorsand are shaded. Replace only with partnum

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-15 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

COMPONENT PARTS LISTCritical safety components are identified bythe letter “X” in their component designatorsand are shaded. Replace only with partnum

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-17 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

COMPONENT PARTS LISTCritical safety components are identified bythe letter “X” in their component designatorsand are shaded. Replace only with partnum

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-19 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

CM151 1-2 CA - GENERALOVERVIEWINTRODUCTIONThe CA series chassis has been developed for sentry 2 screen sizes 25” through 36” stereo models. The chassi

COMPONENT PARTS LISTCritical safety components are identified bythe letter “X” in their component designatorsand are shaded. Replace only with partnum

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-21 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

COMPONENT PARTS LISTCritical safety components are identified bythe letter “X” in their component designatorsand are shaded. Replace only with partnum

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-23 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

COMPONENT PARTS LISTCritical safety components are identified bythe letter “X” in their component designatorsand are shaded. Replace only with partnum

COMPONENT PARTS LISTRC REF PART# DESCRIPTIONCM151 4-25 CA - COMPONENTSRC REF PART# DESCRIPTIONCritical safety components are identified bythe letter “

CM151 5-1 CA - EXPLODED VIEWSSECTION 5MECHANICAL EXPLODED VIEWS25/26V Table Top Set Exploded ViewREF DESCRIPTION LGB26A11ZM LGB26A11ZM61 FRONT CABINET

CM151 1-3 CA - REMOTESSC3492Z MODEL REMOTE CONTROLNote: Keys dedicated to VCR functions will still operate the VCR while theremote is in TV mode.MUTEP

CM151 5-2 CA - EXPLODED VIEWS25V Table Top Set Exploded View817659342MBR3447Z124-00233REF DESCRIPTION B25A24Z B25A24Z6 B25A24ZF1 FRONT CABINET 014-121

CM151 5-3 CA - EXPLODED VIEWS25V Table Top Set Exploded View84217659 MBR3346Z124-00229-01REF DESCRIPTION B25A30ZC B25A30ZCF CB25A25Z CB25A25Z61 FR

CM151 5-4 CA - EXPLODED VIEWS27/29V Table Top Set Exploded View83421657CCMBR3492Z124-00213-23 MBR3345Z124-00229REF DESCRIPTION B27A10Z B27A10Z5 B2

CM151 5-5 CA - EXPLODED VIEWS34217658MBR3447Z124-00233CCMBR3492Z124-00213-2327/29V Table Top Set Exploded ViewREF DESCRIPTION B27A11Z B27A11Z5 B27A11Z

CM151 5-6 CA - EXPLODED VIEWS27/29V Table Top Set Exploded View34217856MBR3447Z124-00233REF DESCRIPTION B27A24Z B27A24Z5 B27A24Z6 B27A24Z65 B27A24ZF B

CM151 5-7 CA - EXPLODED VIEWS83421765 MBR3346Z124-00229-0127/29V Table Top Set Exploded ViewREF DESCRIPTION B27A30Z B27A30ZC B27A30ZC5 B27A30ZC6 B

CM151 5-8 CA - EXPLODED VIEWS27V Table Top Set Exploded View34217856MBR3457Z124-00233REF DESCRIPTION B27A34Z B27A34Z6 B27A34ZF1 FRONT CABINET 014-1234

CM151 5-9 CA - EXPLODED VIEWS32V Table Top Set Exploded ViewREF DESCRIPTION B32A24Z B32A24Z6 B32A24ZF B32A30Z B32A30Z6 B32A30ZF1 FRONT CABINET 014-122

CM151 5-10 CA - EXPLODED VIEWS36V Table Top Set Exploded ViewREF DESCRIPTION B36A24Z B36A24Z6 B36A24ZF B36A30Z B36A30Z6 B36A30ZF B36A34Z B36A34Z6 B36A

CM151 5-11 CA - EXPLODED VIEWS25/27V Traditional Console Set Exploded View812334567MBR3447Z124-00233REF DESCRIPTION B25A74R B25A74LK B27A74R B27A74R51