Summary of the content on the page No. 1
SERVICE MANUAL
BG-1S CHASSIS
MODEL COMMANDER DEST. CHASSIS NO.
MODEL COMMANDER DEST. CHASSIS NO.
KV-T29SN81 RM-870 New Zealand SCC-K37E-A
TRINITRON ® COLOR TV
Summary of the content on the page No. 2
KV-T29SN81 RM-870 SPECIFICATIONS Note Power requirements 110-240 V AC, 50/60 Hz Power consumption (W) Indicated on the rear of the TV Television system B/G Color system PAL, PAL 60, NTSC4.43, NTSC3.58 (AV IN) Stereo/Bilingual system NICAM Stereo/Bilingual B/G, A2 Stereo/Bilingual (German) B/G Teletext language English, German, Swedish, Italian, French, Spanish Channel coverage VHF: 1 to 11/UHF: E21 to E69/CATV: S01 to S03, S1 to S41 Audio output (speaker) 5W × 2 Inputs Antenna: 75 ohms VIDEO IN
Summary of the content on the page No. 3
KV-T29SN81 RM-870 TABLE OF CONTENTS Section Title Page Section Title Page 5. DIAGRAMS SELF DIAGNOSIS REMOVAL............................. 4 5-1. Block Diagram ...................................................... 25 5-2. Circuit Boards Location ....................................... 29 1. GENERAL .................................................................... 5 5-3. Schematic Diagrams and Printed Wiring Boards (1) Schematic Diagram of A Board ........................... 33 2. DISASSEMBLY
Summary of the content on the page No. 4
KV-T29SN81 RM-870 SELF DIAGNOSIS FUNCTION If no acknowledgement is returned from a device which is turned "ON", the device has a problem. In this case, one of the LED's responding to the problem device will flicker a defined number of times. Flickering is operated by lighting the LED's for 60ss each time. The flickering frequency responding to each failed device is shown below. NONVOLATILE AUDIO — Y/C JUNGLE — — MEMORY PROCESSOR Device (TDA8424) Flickering 1 — 3 — — 6 Frequency All the devices a
Summary of the content on the page No. 5
KV-T29SN81 RM-870 – 5 – SECTION 1 The operating instructions mentioned here are partial abstracts from the Operating Instructions Manual. The page numbers of the Operating GENERAL Instruction Manual remain as in this manual. AUTO PROGR AUTO PROGR 2 3
Summary of the content on the page No. 6
KV-T29SN81 RM-870 – 6 – Getting Started Front of TV Connections Camcorder VIDEO 1 INPUT VIDEO AUDIO L (MONO) R to video and audio outputs : Signal flow Connecting a VHF antenna or a combination VHF/UHF antenna When using the video input jacks — 75-ohm coaxial cable (round) Do not connect video equipment to the video input jacks at the front and the rear (VIDEO IN 1 for this model) of your TV simultaneously; otherwise the picture will not be displayed properly on the screen. Attach an optional
Summary of the content on the page No. 7
KV-T29SN81 RM-870 – 7 – Operations Presetting channels manually Switching off the TV Pr Presetting channels esetting channels Watching the TV To switch off the TV temporarily, press POWER on the To change the channel for a particular program remote commander. position or to receive a channel with a weak signal, preset the channel manually. POWER 1 Press MANUAL PROGR. 2 Press PROGR +/– until the required program To switch off the TV completely, press POWER on the position appears on the screen. T
Summary of the content on the page No. 8
KV-T29SN81 RM-870 – 8 – • The last TV program position or video mode just before the TV Each time you press SELECT, the screen changes as Displaying on-screen information turns into Standby mode will appear when the TV turns on follows: Adjusting the picture using the Wake Up Timer. • If no buttons or controls are pressed for more than two hours Press DISPLAY/REVEAL. after the TV is turned on using the Wake Up Timer, the TV PICTURE COLOR BRIGHT and sound The program position, local system, and T
Summary of the content on the page No. 9
KV-T29SN81 RM-870 – 9 – Press the color button which corresponds to the color- Receiving area for NICAM and A2 (German) coded menu. programs Viewing Teletext Selecting a stereo or The page is displayed after a few seconds. System Receiving area NICAM Hong Kong, Singapore, New Zealand, bilingual program etc. Selecting a Teletext page A2 (German) Australia, Malaysia, Thailand, etc. To input the three-digit page number of the Teletext page, press the number buttons. If you make a mistake, key in th
Summary of the content on the page No. 10
KV-T29SN81 RM-870 – 10 – Additional Information No picture Troubleshooting No sound /Press POWER. /Check the antenna connection. /Check the VCR connections. /Check the power cord connection. If you have any problems, read this manual again and /Check the standby mode. check the countermeasure for each of the symptoms listed below. Good picture If the problem persists, contact your nearest authorized No sound service center or dealer. Snowy picture Noisy sound /Press VOLUME +. /Press MUTING. /Pre
Summary of the content on the page No. 11
KV-T29SN81 RM-870 – 11 – SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-3. F1 BOARD REMOVAL F1 board 2 Three screws (BVTP 4×16) 4 One screw (BVTP 3×16) 1 Three screws (BVTP 4×16) 2-2. A BOARD REMOVAL 2-4. SERVICE POSITION A board Lever Lever A board
Summary of the content on the page No. 12
KV-T29SN81 RM-870 – 12 – 2-5. REPLACEMENT OF PARTS 2-6. DEMAGNETIZATION COIL REMOVAL For replacement of the Multi Button, Power Button and Light Guide, cut the welded portions from them, exchange with the new parts, and fix them with screws (+BVTP) respectively. 2-5-1. REPLACEMENT OF MULTI BUTTON 2 DGC holder Remove the claw Two screws (BVTP 3×12) 3 Demagnetization coil 1 DGC band 2-5-2. REPLACEMENT OF LIGHT GUIDE POWER BUTTON 4 Tension spring Light guide Cut Two screws (BVTP 3×12) Power button
Summary of the content on the page No. 13
KV-T29SN81 RM-870 – 13 – 2-7. PICTURE TUBE REMOVAL NOTE : The picture tube for this model is upside-down and the position for the anode-cap and tension spring is changed accordingly b 3 F1 board b 4 C board 5 VM board 6 Deflection yoke 2 A board 2 Using a thumb press down then pull up the rubber cap firmly in the direction indicated by the arrow b. 7 Four screws (Tapping screws) c 1 Anode cap Anode button Anode Button 3 When one side of the rubber cap is separated from the ano
Summary of the content on the page No. 14
KV-T29SN81 RM-870 SECTION 3 SET-UP ADJUSTMENTS • The following adjustments should be made when a complete Perform the adjustments in order as follows : realignment is required or a new picture tube is installed. 1. Beam Landing • These adjustments should be performed with rated power 2. Convergence supply voltage unless otherwise noted. 3. Focus 4. White Balance Controls and switch should be set as follows unless otherwise noted: Note : Test Equipment Required. PICTURE control .................
Summary of the content on the page No. 15
KV-T29SN81 RM-870 • If the V.STAT magnet is moved in the direction of the a and 3-2. CONVERGENCE b arrows, the red, green, and blue points move as shown below. Preparation : • Before starting this adjustment, adjust the focus, horizontal size, and vertical size. 1 • Minimize the brightness setting. a ab • Provide dot pattern. B B b b GG (1) Horizontal and Vertical Static Convergence R R Center dot R 2 G a a B R G B R G B H.STAT V.STAT Magnet b b B G R 3 a b a b R B RV 702
Summary of the content on the page No. 16
KV-T29SN81 RM-870 • Operation of BMC (Hexapole) Magnet • Y separation axis correction magnet adjustment. If the red, green and blue dots are not balanced or aligned, then 1. Receive the cross-hatch signal and adjust [PICTURE] to “MIN” use the BMC magnet to adjust in the manner described below. and [BRIGHTNESS] to “STANDARD” . 2. Adjust the Y separation axis correction magnet on the neck assembly so that the horizontal lines at the top and bottom of RG B RG B R GB the screen are straight. Red Blu
Summary of the content on the page No. 17
KV-T29SN81 RM-870 (2) Dynamic Convergence Adjustment Preparation : 3. Move the deflection yoke as shown in the figure below and • Before starting this adjustment, adjust the horizontal static convergence and the vertical static convergence. optimize the convergence. 4. Tighten the deflection yoke screws. 1. Slightly loosen the deflection yoke screws. 2. Remove the deflection yoke spacer. 5. Install the deflection yoke spacer. R B B G R G G RG B B R BR G R GB RG B B G R B R R B G G G B G R R B (
Summary of the content on the page No. 18
KV-T29SN81 RM-870 DATA 3-3. FOCUS ADJUSTMENT Adjust FOCUS control on the flyback transformer for the best 09 RDR 1 F SERVICE focus. Adjustment Item Item number 09 RDR 1 F WRITE MUTING 0 Executes the writing Focus 3-4. G2 (SCREEN) AND WHITE BALANCE Note: Screen VR is not use. ADJUSTMENTS 1. G2 (SCREEN) ADJUSTMENT (RV701) a. AN ITEM OF ADJUSTMENT 1) Set the PICTURE and BRIGHTNESS to normal. 2) Put to VIDEO input mode without signals. Item Adjustment Initial DATA Note number item 3) Connect R, G, a
Summary of the content on the page No. 19
KV-T29SN81 RM-870 SECTION 4 CIRCUIT ADJUSTMENTS 4-1. ADJUSTMENTS WITH COMMANDER Service adjustments are made with the RM-870 that comes with this unit. [1], [4] Raise/lower the service item number [3], [6] Raise/lower the data [MUTING] Writes Entering service mode [0] Executes the writing With the unit on standby ↓ DISPLAY [7], [0] The data all becomes the values in memory ↓ [8], [0] User control all goes to the standard state 5 [5], [0] Service data initialization (Be sure not to use ↓ usually.
Summary of the content on the page No. 20
KV-T29SN81 RM-870 4-2. ADJUSTMENT METHOD Item Number 08 This explanation uses V-SHIFT as an example. Use the same method for Items Number 00-4B. Use [1] and [4] to select the adjustment item, use [3] and [6] to adjust, write with 1. Select 08 V-SHIFT with the [1] and [4] buttons. 2. Raise/lower the data with the [3] and [6] buttons. [MUTING], then execute the write with [0]. 3. Select the optimum state. (The standard is 0F for PAL reception.) 4. Write with the [MUTING] button. 5. Execute the wri
