Service tips - CHASSIS ICC 9 - Usefull info

Oct 12, 2026

Service tips for TV chassis ICC 9, focused on troubleshooting and safe access to service mode. The guide explains how microprocessor software version and teletext board compatibility can cause faults such as loss of teletext, remote control failure, standby lock, or tripping-type errors. It provides memory device replacement steps, teletext ROM/NVM restore options, voltage adjustment constraints, UHF/VHF head variations, production changes in power supply and control panel circuits, and low-voltage power supply checking methods. It also lists service repair kit contents and parts numbers.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages15

Reading Time38 min

AccessFree to download

Usefull info

Microprocessor and teletext compatibility

Access to service mode

Service menu options and voltage notes

UHF/VHF head and production changes

Power supply checking and repair kit contents

RTVservisHorvat Tel: ++385-31-856-637 Tel/fax: ++385-31-856-139 Mob: 098-788-319 [www.rtv-horvat-dj.hr](www.rtv-horvat-dj.hr) Service tips for CHASSIS ICC 9 TCE SABA BRANDT THOMSON FERGUSON NORDMENDE TELEFUNKEN 1. Usefull info Microprocessor sofware version and teletext board compatibility. The technical help line engineers have reported several cases where different fault conditions have arisen after the replacement of the microprocessor or the text board, these have been either no teletext operation, no remote control functions, the television will not come out of the standby mode or even a description of a tripping type fault. In most cases it has been found that the cause of the problem is due to incompatibility between the microprocessor's software version and the teletext board. If you find it necessary to replace either the microprocessor or the teletext board, the following table will enable you to avoid any of the above-mentioned problems arising after replacing the retrospective devices. Micro software version type: C9-20 Main chassis sub code: ICC9 280 Teletext PCB type no: DVT 9002 Micro software version type: C9-20 Main chassis sub code: ICC9 777 Teletext PCB type no: DVT 9002 Micro software version type: C9-20 Main chassis sub code: ICC9 270 Teletext PCB type no: DVT 9002 Micro software version type: C9F-25 Main chassis sub code: All Chassis Types Teletext PCB type no: DVT 9003 Identification of the microprocessor software version is via the last four digits after the part number of the IC, i.e. 10177300-C9-20 The teletext board type number is printed on a white label, stuck generally on the component side of the PCB. The main chassis identification number is silk screen printed on the component side along the front edge of the PCB ie. to the left of the chopper power supply circuit. Teletext access time-alternative memory device. 1: A problem which affects the access time and the data acquisition cycle for both fastext links and index pages on earlier versions of the Teletext PCBs can be overcome by removing the memory device used at location IT03 and fitting an alternative device at location IT02. After removing IT03, check the copper tracks for s/cs. Fit new memory device IT02, check the copper track for s/cs. The alternative memory device (HY53C464LS-80/LH2464-10) is available under part no. 46157900. Note: Whilst handling the teletext PCB and the new memory device, ensure that the workplace is correctly protected against static discharge and the equipment used conforms to the latest Health and Safety at Work Regulation. Access to service mode 1. Switch TV on using on/off switch on set. 2. Switch to standby using handset. 3. Switch TV off using on/off switch on set. 4. Press blue text key on handset whilst switching TV on using on/off switch. 5. Enter service menu by pressing blue key. Menus: SETUP = TV settings VIDEO = video adjustments GEOMETRY = Geometry adjustments RESTORE---This will retrieve the previous hex value in NVM if this has been altered during adjustment. It will not return values if they have been stored. ROM----This will return NVM to default settings. VOLT---This must not be adjusted using +/-keys on handset but using +/-buttons on TV VOLT Usys. Cathode DP61 154V=33" 29" 25" (4/3) 145V= 21" (110°) 121V= 21" (90°) 165V = 32" (16/9) UHF/VHF head. Two types of head have been used on this appliance: MTP MM-2014/01 (code 503TX0491) and MTP-4015F (code 503TX0491) . The latter version has a grounding point between pins 3 and 4. Production changes-Power supply circuit. Following components have been removed during production : Diode DP58 (ZPD 30V) Diode DP59 (LS4148) On non-modified appliances, a loss at DP58 level may cause appliance to switch off at random. Production changes-Control panel. On these appliances two types of control panel have been used: Type one: Membrane control panel (part no.: 103TX1130) combined

FAQs

Why do teletext or remote control faults occur after replacing the microprocessor or teletext board?

Faults can arise when the microprocessor software version is incompatible with the teletext board, leading to issues such as no teletext operation, no remote control functions, standby lock, or tripping-type faults.

How can an access-time issue on earlier teletext PCB versions be mitigated?

Remove the memory device at location IT03, check copper tracks for short circuits, then fit the alternative memory device at location IT02 and re-check the tracks.

What are the key steps to enter service mode using the handset?

Switch the TV on, switch to standby using the handset, switch off using the set’s on/off switch, then press the blue text key on the handset while switching the TV on to enter the service menu.

Oct 12, 2026

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