Sanyo CE28FV2-E Service Manual

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Service Manual

Colour Television

Index

Safety instructions................................................................................................................................................................................. 1

WARNING ............................................................................................................................................................................................ 1

Precaution against X-Rays.................................................................................................................................................................... 1

Recommendations to protect our environment...................................................................................................................................... 1

Technical characteristics....................................................................................................................................................................... 2

Safety ................................................................................................................................................................................................... 2

EMC (Electromagnetic Compatibility).................................................................................................................................................... 2

Factory special mode ............................................................................................................................................................................ 3

"HOTEL" and "RENTAL" modes............................................................................................................................................................ 3

Automatic channel search reactivating ............................................................................................................................................. 3

Block diagram................................................................................................................................................................................... 4

Power supply .................................................................................................................................................................................... 5

Microprocessor and Teletext............................................................................................................................................................. 5

Video processor/Comb filter.............................................................................................................................................................. 5

14.1

Video Intermediate Frequency Section......................................................................................................................................... 5

14.2

Horizontal and vertical synchronisation ........................................................................................................................................ 5

14.3

Geometry ..................................................................................................................................................................................... 6

14.4

Filters and video switches ............................................................................................................................................................ 6

14.5

Colour decoder............................................................................................................................................................................. 6

14.6

RGB Processing........................................................................................................................................................................... 6

14.7

RGB Control................................................................................................................................................................................. 7

14.8

Supply and bandgap decoupling................................................................................................................................................... 7

Audio processor/A3D Surround/Output amplifiers/Sound IF ............................................................................................................. 7

Service menu.................................................................................................................................................................................... 8

Adjustment and repair procedures .................................................................................................................................................. 10

17.1

Notes about the adjustment:....................................................................................................................................................... 10

17.2

Switch-on sequence. .................................................................................................................................................................. 11

17.3

Protect modes and failure indication........................................................................................................................................... 11

17.4

Protect mode inhibition............................................................................................................................................................... 11

17.5

Power supply repair procedure ................................................................................................................................................... 11

17.6

Non-volatile memory (NVM) replacement, IC125........................................................................................................................ 11

Failure location flow-charts ............................................................................................................................................................. 12

Complete PCB codes for after sales service................................................................................................................................... 15

CHASSIS ELECTRICAL PARTS LIST............................................................................................................................................ 16

CABINET PARTS LIST 21" ............................................................................................................................................................ 17

CABINET PARTS LIST 25" ............................................................................................................................................................ 18

CABINET PARTS LIST 28" ............................................................................................................................................................ 19

Parts List ........................................................................................................................................................................................ 20

Give complete "SERVICE PART No" for parts order or

servicing, it is shown on the rating sheet on the cabinet

back of the TV set.

13/01/2000

Models:

CE28FV2-E

CE25FV2-E

CE21FV2-E

CRT 28" A59EAK071X11

CRT 25" A66EAK071X11

CRT 21" A51EAL155X10

CRT 21" A51EAL155X11

CHASSIS No 2103

EB5-A

Note

This TV receiver will not work properly in foreign countries

where the television transmission system and power

source differ from the design specifications. Refer to the

specifications for the design specifications.

Ref. Nº MS CE25FV2-E

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Summary of Contents for Sanyo CE28FV2-E

Page 1: Table Of Contents
Service Manual Models: CE28FV2-E CE25FV2-E Colour Television CE21FV2-E CRT 28” A59EAK071X11 CRT 25” A66EAK071X11 CRT 21” A51EAL155X10 CRT 21” A51EAL155X11 CHASSIS No 2103 EB5-A Index Safety instructions....................................1 WARNING ......................................1 Precaution against X-Rays..................................1 Recommendations to protect our environment............................1 Technical characteristics..................................
Page 2: Safety Instructions
Safety instructions Read this page before doing any operation of adjustment, maintenance or repair the TV set described. Only skilled personnel of Sanyo Technical Service should do the adjustment, maintenance or repair of TV set. WARNING For the correct and safe use of the TV set, it is essential that the service personnel follow the process of safety generally accepted and the safety precautions specified in this manual.
Page 3: Technical Characteristics
Technical characteristics Cathode-ray tubes 21” (54 cm) Model CE21FV2-E 25” (65 cm) Model CE25FV2-E 28” (70 cm) Model CE28FV2-E In-Line gun type. Black Matrix. Voltage synthesis, 100 programs in non volatile memory, AFT, fine tuning (first Tuning system 10 programs), automatic, semiautomatic and manual channel search.
Page 4: Factory Special Mode
Service Manual MS CE25FV2-E Factory special mode The factory mode is a special TV working mode intended to help in the manufacturing process and it is identified on the screen with the message “FAC”. This mode is never suited for customer use. The main differences respect to normal mode are: 1- The standby mode is always disabled.
Page 5: Block Diagram
Service Manual MS CE25FV2-E 11 Block diagram...
Page 6: Power Supply
Service Manual MS CE25FV2-E 12 Power supply First, let’s define some TV states or working modes to clarify later explanations: State Description SMPS_B_LOW The power supply is in low consumption (low voltage). The deflection is stopped. SMPS_B_HIGH The power supply works at nominal voltage. The deflection can be on or off. STANDBY The micro stops “B_HIGH”...
Page 7: Geometry
Service Manual MS CE25FV2-E • PHI-2 detector and Sandcastle generator: The PHI-2 detector performs a stable picture. It synchronises the horizontal oscillator with the horizontal flyback signal (pin 41, FBISO) to generate the horizontal output (pin 40, HOUT). . The components associated with the PHI-2 are connected to the pin 42 (PH2LF). The picture phase is adjusted via I2C (HOR SHIFT in the service menu).
Page 8: Rgb Control
Service Manual MS CE25FV2-E 14.7 RGB Control • Contrast and brightness control: There are I2C bus controlled. These adjustments can be reduced by the beam current limiter stage. Furthermore, contrast is affected by the Peak Beam Limiter (Q670 and Q671 circuitry).
Page 9: Service Menu
Service Manual MS CE25FV2-E 16 Service menu The service menu is accessed by holding down the front key “VOL-“ and simultaneously pressing the teletext green key from the remote control. The service menu is a two level structure as shown in the diagram below. The active keys (local or remote) in service mode are: VOL-, VOL+, P-, P+, MENU and the digits.
Page 10 TXEAST Eastern characters set ON/OFF Skin tone correction angle ON/OFF HV discharge mode ON/OFF TV set trade-mark ON/OFF OFF in SANYO models ON in others models 16:9 16:9 picture configuration ON/OFF PAL B/G PAL B/G Configuration ON/OFF PAL D/K PAL D/K Configuration...
Page 11: Adjustment And Repair Procedures
Service Manual MS CE25FV2-E 17 Adjustment and repair procedures ADJUSTMEN SIGNAL CONDITIONS TEST POINTS ADJUSTMENT POINT ADJUSTMENT PROCEDURE INSTRUMENTS Power supply Philips pattern Picture: Normalised VR800 Adjust to obtain: Voltmeter DC Sound: Minimum volume Cathode D850 150V ± 0.5V in CRTs Philips A59/A66EAK071X11 if C651 = 12 nF Resolution >0,1V 148V ±...
Page 12: Switch-On Sequence
Service Manual MS CE25FV2-E 17.2 Switch-on sequence. In case of malfunction it is very important to know the switch-on procedure: 1. When the reset is at low level the microprocessor begins to work. 2. It recalls from NVM the last state before the switch-off. 3.
Page 13: Failure Location Flow-Charts
Service Manual MS CE25FV2-E 18 Failure location flow-charts ERROR_1 ERROR_2 ERROR_5 Switch on the TV set with PL100 Are the retrace Does it happen quickly Check +5Vin L1304 (audio PCB) pushed (protect mode disabled) lines visible? after switch on? Check the +8V supply *Check +B3 at IC500 in pins 12 and 37 of IC400 Check the vertical deflection...
Page 14 Service Manual MS CE25FV2-E ERROR_3 Does it happen quickly Are retrace lines visible ? after switch on? *Check +B3 at IC500 Switch on the TV set with PL100 *R506 posibly fused pushed (protect mode disabled) *IC500 posibly damaged * Possible failure of T650 Does it sound line * Possible shortcircuit in stage abnormal?
Page 15 Service Manual MS CE25FV2-E ERROR_4 Put a jumper between B-E of Q850 (N.1) Probably: Check +B4 Check the rectifier * IC701failure (cathode of D852) diodes * Shortcircuit or over consumptiom * IC850 does not work OK In models with Active 3D Surround: Check +9V In models without Active 3D Surround:Skip this step Probably: Is the voltage level...
Page 16: Complete Pcb Codes For After Sales Service
Probably IC800 failure - N.1: If there is an IC800 failure, and R810 was openned, it is strongly recommended to replace also the resistors R804 and R805 19 Complete PCB codes for after sales service CE28FV2-E CE25FV2-E CE21FV2-E CRT (PHILIPS)
Page 17: Chassis Electrical Parts List
Service Manual MS CE25FV2-E 20 CHASSIS ELECTRICAL PARTS LIST Ref. No. Part No. Description YG 1 0200826402 LED Holder Position Part No. Description YG 4 0080112519 COMP. Side IF Shield EB5-A YG 5 0080112600 Copper Side IF Shield EB5-A Assy PF(Power Supply) YG 6 0200627305 AUDIO MODULE Holder EB-2B IC800...
Page 18: Cabinet Parts List 21
Service Manual MS CE25FV2-E 21 21CABINET PARTS LIST 21” Location Part No. Description YP 4 0020130514 Badge SANYO 53,5X12 SILVER YF 1 2700024504 Front Cabinet Assy 21" YF 2 0590270609 Back Cover 21" YF 3 0130214406 Power BUTTON F7W YF 4...
Page 19: Cabinet Parts List 25
Service Manual MS CE25FV2-E 22 CABINET PARTS LIST 25” Location Part No. Description YP 4 0020130514 Badge SANYO 53,5X12 SILVER YF 1 2700024108 Front Cabinet Assy 25" F7V YF 2 0590268405 Back Cover 25" F7VA YF 3 0130214406 Power BUTTON F7W...
Page 20: Cabinet Parts List 28
Service Manual MS CE25FV2-E CABINET PARTS LIST 28” Location Part No. Description YP 4 0020130514 Badge SANYO 53,5X12 SILVER YF 1 2700024207 Front Cabinet Assy 28" YF 2 0590268702 Back Cover 28" YF 3 0130214406 Power BUTTON F7W YF 4...
Page 21: Parts List
C1053 25 28 0230600504 Ceramic SMD 100 nF. 10% 25V. C1054 25 28 0230600504 Ceramic SMD 100 nF. 10% 25V. Exclusive component for CE28FV2-E C1055 25 28 0230600504 Ceramic SMD 100 nF. 10% 25V. C1056 25 28 0250320769 Electrolytic 10 µF. 16V.
Page 22 Service Manual MS CE25FV2-E Location Part No. Description Location Part No. Description C351 0230360406 Ceramic SMD 1000 pF. 10% 50V. C675 0230600504 Ceramic SMD 100 nF. 10% 25V. C352 0250410867 Electrolytic 47 µF. 16V. C676 0270381080 Polyester 220 nF. 10% 63V. C353 0250410867 Electrolytic 47 µF.
Page 23 Service Manual MS CE25FV2-E Location Part No. Description Location Part No. Description C909 0230320301 Ceramic SMD 470 pF. 10% 50V. D751 25 28 0360603203 Zener SMD MMSZ15T1 C910 0230320301 Ceramic SMD 470 pF. 10% 50V. D752 25 28 0360601603 SMD MMSD4148T1 C911 0230320301 Ceramic SMD 470 pF.
Page 24 Service Manual MS CE25FV2-E Location Part No. Description Location Part No. Description 0790701106 SMD 0 Ω 1/10W. L652A1 25 28 0640850210 Eyelet 1,6-3 J-140 L652A2 0640705117 Eyelet 2,5-3 0790701106 SMD 0 Ω 1/10W. J-142 L652A3 0640850210 Eyelet 1,6-3 0790701106 SMD 0 Ω 1/10W. J-143 L653 0090310806 Adjustable Width Coil 27/130 µH.
Page 25 Service Manual MS CE25FV2-E Location Part No. Description Location Part No. Description Q673 0360320022 SMD BC 848 B R147 0790255004 R.M.G. SMD 22 KΩ 5% 1/10W. Q700 0360320121 SMD BC 858 B R148 0790251003 R.M.G. SMD 10 KΩ 5% 1/10W. Q750 25 28 0360308605 KSP 92 TO-92...
Page 26 Service Manual MS CE25FV2-E Location Part No. Description Location Part No. Description 0790123103 Carbon 47 Ω 5% 1/4W. R350 0790516702 Fuse 0,47 Ω 5% 0,5W. R666 25 28 0790123103 Carbon 47 Ω 5% 1/4W. R351 R667 0790239008 R.M.G. SMD 1 KΩ 5% 1/10W. 0790711204 R.M.G.
Page 27 0790157408 Carbon 33 KΩ 5% 1/6W. T650A 0640705117 Eyelet 2,5-3 R873 0790251003 R.M.G. SMD 10 KΩ 5% 1/10W. T650CF 0330160508 FOCUS Wire FBT SANYO 0790135206 Carbon 470 Ω 5% 1/4W. R875 T650CG 0330160607 G2 Wire FBT SANYO R876 0790239008 R.M.G. SMD 1 KΩ 5% 1/10W.
Page 28 0010716116 Holder RC GBR-BLFAF RESISTORS All information in this manual is correct at the start of 0790227003 R.M.G. 100 Ω 5% 1/10W R1300 production. Sanyo reserves right modify 0790227003 R.M.G. 100 Ω 5% 1/10W R1301 components and procedures in order to comply with their R1302 0790251003 R.M.G.

This manual is also suitable for:

Ce25fv2-e Ce21fv2-e

Sanyo CE28FV2-E Service Manual

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