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14BM2, 14BM2S/G
21BM2, 21BM2S/G
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
Ë Multi 18 Systems
Ë Full Auto Channel Preset and Auto Channel Skip
Ë 100-CH Program Memory
Ë High Contrast Picture
Ë Black Stretch Circuit
Ë CATV (Hyper Band) Ready
〈Used Frequency Synthesizer Tuner〉
» SPECIFICATIONS ........................................... 2
» IMPORTANT SERVICE NOTES ...................... 2
» ADJUSTMENT PRECAUTIONS ..................... 3
» HOTEL MODE APPLICATION NOTE ............ 15
» TROUBLE SHOOTING TABLE ...................... 15
» SOLID STATE DEVICE BASE DIAGRAM ..... 18
» CHASSIS LAYOUT ........................................ 19
» BLOCK DIAGRAM ......................................... 22
» WAVEFORMS ............................................... 25
» SCHEMATIC DIAGRAM
MAIN UNIT ............................................... 28
CRT UNIT ................................................. 34
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user - serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
20BM2, 20BM2S/G
MODELS
FEATURE
CONTENTS
Page
WARNING
SHARP CORPORATION
1
COLOUR TELEVISION
Chassis No. UA-1
14BM2, 14BM2S/G
20BM2, 20BM2S/G
21BM2, 21BM2S/G
Ë Hotel Mode
Ë On Timer/Sleep Timer/Reminder Timer
Ë Colour Comb Filter Function (NTSC only)
Ë Blue Back Noise Mute
Ë Front AV-In & Rear AV-In/Out Terminals
Ë AVL Function
Ë English/Chinese/Malay/France/Russia/Arabic OSD
ELECTRICAL PARTS ............................... 41
MISCELLANEOUS PARTS ...................... 46
SUPPLIED ACCESSORIES ..................... 46
PACKING PARTS ..................................... 46
CABINET PARTS ..................................... 46
14BM2, 14BM2S/G
20BM2, 20BM2S/G
21BM2, 21BM2S/G
S00K414BM2S//
Page
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Table of Contents
Related Manuals for Sharp 14BM2
Summary of Contents for Sharp 14BM2
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Page 1: Table Of Contents
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G SERVICE MANUAL S00K414BM2S// COLOUR TELEVISION Chassis No. UA-1 14BM2, 14BM2S/G 20BM2, 20BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G MODELS 21BM2, 21BM2S/G In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. -
Page 2: Specifications
Voice Coil Impedance ................6 ohms at 400 Hz 1. 14BM2 : When repairing the circuit, be sure not to increase the high volt- age to more than 25.5 kV (at beam 0.1 µA) for the set. -
Page 3: Adjustment Precautions
Ë SERVICE MODE ADJUSTMENT PRECAUTIONS (1) In the Service Mode, Key is used to select the mode in the following order. This model’s setting are adjusted in two different ways: though the I C bus control and in the conventional analog manner. The adjustments via the I C bus control include preset-only items and variable data. - Page 4 USER DATA IN SERVICE MODE Y-DELAY OFFSET ADJ. ADJ. OPTION MODE MODE MODE * While SERVICE mode ON, EEPROM DATA will switch to the service data. ↓ ↓ ↓ Also, once SERVICE mode OFF, EEPROM will switch back to previous USER DATA. Y-D TIME FOR PAL (TV) (DL-PT) COLOUR OFFSET (PAL) (COL-OP) VERTICAL SCAN DISABLE(VSD)
- Page 5 Y-DELAY TIME FOR SECAM(TV) [YD] DL-ST 0~15 SYNC OF OSD 0(DISABLE)/1(ENABLE) Y-DELAY TIME FOR N358 (TV) [YD] DL-3T 0~15 TUNER SELECTION (0:SHARP/ALPS;1:MURATA) 0(DISABLE)/1(ENABLE) Y-DELAY TIME FOR N443 (TV) [YD] DL-4T 0~15 BILINGUAL 0(DISABLE)/1(ENABLE) Y-DELAY TIME FOR B/W (TV) [YD] DL-TV...
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Page 6: Initial Setting
INITIAL SETTING SHIPPING SETTING & CHECKING (1) In service mode, After execute select POS 1, store the following tuning data in E PROM. (1) The following default data has been factory-set for the E PROM. MCL1 MCL2 ITEMS DATA SETTING CH-No. -
Page 7: Purity Adjustment
PURITY ADJUSTMENT PIF ADJUSTMENT NO. Adjustment part Adjusting procedure and conditions Waveform and others NO. Adjustment part Adjusting procedure and conditions Waveform and others PURITY 1. Receive the GREEN-ONLY signal. Adjust the TUNER IFT 1. Get the tuner ready to receive the E-9 CH sig- beam current to ~700 µA (21"... -
Page 8: Convergence Adjustment
CONVERGENCE ADJUSTMENT CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT NO. Adjustment part Adjusting procedure and conditions Waveform and others NO. Adjustment part Adjusting procedure and conditions Waveform and others 1. Switch TV to VIDEO mode, BLUE BACK OFF, CRT CUTOFF CONVERGENCE 1. - Page 9 HORIZONTAL, VERTICAL, DEFLECTION LOOP AND FOCUS ADJUSTMENT NTSC CHROMA ADJUSTMENT NO. Adjustment part Adjusting procedure and conditions Waveform and others NO. Adjustment part Adjusting procedure and conditions Waveform and others V-SLOPE 1. Receive Monoscope Pattern Signal. SUB-TINT 1. Receive the “NTSC 3.58 Colour Bar” signal thru C BUS 2.
- Page 10 FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) (Continued) NO. Adjustment part Adjusting procedure and conditions Waveform and others CONTRAST 1. Receive “Monoscope Pattern” signal. NO. Adjustment part Adjusting procedure and conditions Waveform and others 2. Set P-Mode to select CONTRAST. COLOUR 1.
- Page 11 MEMORY MAP DATA MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL ADDRESS (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK 00-0F SHARPNESS-OFFSET (SECAM) SHARPNESS-OFFSET (N443) 00-0F 00-0F DATA SHARPNESS-OFFSET (N358) ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL...
- Page 12 DATA DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK TUNING FREQUENCY (HIGHER PART) POS 4...
- Page 13 DATA DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK POS 46 TUNING FREQUENCY (HIGHER PART)
- Page 14 DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK POS 89 TUNING FREQUENCY (HIGHER PART) POS 90 TUNING FREQUENCY (LOWER PART) S-SYS (auto) C-SYS TUNING FREQUENCY (HIGHER PART) POS 91 TUNING FREQUENCY (LOWER PART)
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Page 15: Hotel Mode Application Note
UA1 HOTEL MODE APPLICATION NOTE TROUBLE SHOOTING TABLE The purpose of this HOTEL MODE is to enable hotel authorized person to store the tuned NO RASTER programs as hotel channels, current volume as hotel volume (maximum volume), picture and sound setting. In addition, The user will not be able to select Preset and Channel-setting func- tions. - Page 16 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) CIRCUITS TO BE CHECKED: NO PICTURE, NO SOUND NEITHER VERTICAL NOR Tuner. PIF. HORIZONTAL SYNCHRONIZATION Automatic Gain Control. (5V), (33V) Power Source. Does the noise level increase at max. Contrast, Brightness and Sound controls ? CIRCUIT TO BE CHECKED: Sync.
- Page 17 TROUBLE SHOOTING TABLE (Continued) NO SPECIFIC COLOUR Is some colour produced in B/W broadcast reception ? Is the white balance properly Check IC801, R801, R802, adjusted ? R803, D804, D805, D806 and Q801. Readjust the white balance. The picture colour is cyan. The picture colour is magenta.
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Page 18: Solid State Device Base Diagram
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G SOLID STATE DEVICE BASE DIAGRAM TOP VIEW COLLECTOR COLLECTOR :BR: BASE EMITTER BASE EMITTER M24C04W B709A FX0008GE D601A COLLECTOR BASE EMITTER 2SC2735 IX3368CE SIDE VIEW BASE 1 2 3 COLLECTOR BASE EMITTER COLLECTOR SE115N... -
Page 19: Chassis Layout
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G CHASSIS LAYOUT : 14BM2S/G... -
Page 20: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G CHASSIS LAYOUT : 20BM2S/G... -
Page 21: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G CHASSIS LAYOUT : 21BM2S/G... - Page 22 14BM2, 14BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G 21BM2, 21BM2S/G MAIN UNIT BLOCK DIAGRAM 22~23...
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Page 23: Block Diagram
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G BLOCK DIAGRAM CRT UNIT BLOCK DIAGRAM : 14BM2S/G CRT UNIT BLOCK DIAGRAM : 20BM2S/G/21BM2S/G... -
Page 24: Waveforms
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G WAVEFORMS 5 68.0Vp-p 14" 1 1.00Vp-p 14" 2 2.50Vp-p 14" 3 2.55Vp-p 14" 4 3.35Vp-p 14" 83.8Vp-p 21" & 20" 1.12Vp-p 21" & 20" 3.17Vp-p 21" & 20" 3.11Vp-p 21" & 20" 3.11Vp-p 21" & 20"... -
Page 25: Description Of Schematic Diagram
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTES: NOTES: 1. The unit of resistance “ohm” is omitted. 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS. (K = 1000 ohms, M = Meg ohm). -
Page 26: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G 21BM2, 21BM2S/G MAIN UNIT : 14BM2S/G 28~29... -
Page 27: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G 21BM2, 21BM2S/G MAIN UNIT : 20BM2S/G 30~31... - Page 28 14BM2, 14BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G 21BM2, 21BM2S/G MAIN UNIT : 21BM2S/G 32~33...
- Page 29 14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G CRT UNIT : 14BM2S/G CRT UNIT : 20BM2S/G...
- Page 30 14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G CRT UNIT : 21BM2S/G...
- Page 31 14BM2, 14BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G 21BM2, 21BM2S/G PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side) 36~37...
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Page 32: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 14BM2, 14BM2S/G 20BM2, 20BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G 21BM2, 21BM2S/G PWB-A: MAIN Unit (Chip Parts Side) 38~39... -
Page 33: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G PWB-B: CRT Unit (Wiring Side) -
Page 34: Main Unit
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G Ref. No. Part No. Description Code Ref. No. Part No. Description Code REPLACEMENT PARTS LIST DUNTK9988WEV6(14BM2S/G DUNTK9988WEV7(14BM2G) PARTS REPLACEMENT DUNTK9988WEW0(20BM2S) Replacement parts which have these special safety characteristics DUNTK9988WEW1(20BM2G) identified in this manual: electrical components having such features DUNTK9988WEW4(21BM2S/G) are identified by "å"... -
Page 35: 14Bm2, 14Bm2S/G
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G Ref. No. Part No. Description Code Ref. No. Part No. Description Code D604 RH-DX0475CEZZ R DX0475CE TRANSFORMERS D605 RH-EX0840CEZZ R Zener Diode å T601 RTRNZ0026PEZZ R Transformer D606 RH-DX0475CEZZ R DX0475CE (20BM2S/G/21BM2S/G) D607 RH-EX0658GEZZ R Zener Diode å... - Page 36 14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G Ref. No. Part No. Description Code Ref. No. Part No. Description Code C606 VCKYCY1HF103Z R 0.01 50V Ceramic C803 VCEA9M1CW107M R 100 16V Electrolytic C607 VCEA0A1CW477M R 470 16V Electrolytic C804 VCKYCY1HB222K R 2200p 50V Ceramic...
- Page 37 14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G Ref. No. Part No. Description Code Ref. No. Part No. Description Code RJ97 VRN-MD2AL000J 0.1W Metal Film R508 VRD-RM2HD221J R 220 1/2W Carbon RJ100 VRN-MD2AL000J 0.1W Metal Film R509 VRD-RM2HD1R0J R 1 1/2W Carbon...
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Page 38: Miscellaneous Parts
14BM2, 14BM2S/G 20BM2, 20BM2S/G 21BM2, 21BM2S/G Ref. No. Part No. Description Code Ref. No. Part No. Description Code R709 VRD-RA2BE681J R 680 1/8W Carbon BALUNES R710 VRN-VV3ABR39J R 0.39 1W Metal Film FB306 RBLN-0037CEZZ R Balun, BLN-0037CE R711 VRN-VV3ABR33J R 0.33 1W... -
Page 39: Supplied Accessories
P851 QPLGN0661CEZZ R Plug, 6Pin(14BM2S/G) (14BM2G/G P882 QPLGN0541CEZZ R Plug Not Available - Front Cabinet — (20BM2S/G/21BM2S/G) HBDGB0019PESB R SHARP Badge P882 QPLGN0561CEZZ R Plug, 5Pin(14BM2S/G) å SC882 JBTN-0345PESA R Control Button(14BM2S) QSOCV0931CEZZ R Socket JBTN-0345PESB R Control Button(14BM2G) HDECQ0186PESA R LED, R/C Cover... - Page 40 CCABA2648WEV1 R Front Cabinet Ass'y (21BM2G) 1-1 1 Not Available - Front Cabinet — HBDGB0015PESB R SHARP Badge HDECQ0186PESA R RC/LED Cover HDECA0083PESA R SP Decoration-R HDECA0084PESA R SP Decoration-L HDECQ0187PESA R SP NET-R HDECQ0187PESB R SP NET-R HDECQ0188PESA R SP NET-L...