Sharp VC-M311AHM free download

File name SHARP VC-M301_311_321HM-SM.pdf

VC-M311HM/LM/AHM VC-M301HM/LM VC-M321HM(GY) SERVICE MANUAL SY7J5VCA582U/ S7826VCM301HM VIDEO CASSETTE RECORDER (SUPPLEMENT) VC-M321HM(GY) MODELS VC-M301HM,VC-M301LM, VC-M311AHM VC-M311HM, VC-M311LM VC-M301HM VC-M301LM VC-M311HM VC-M311LM VC-M311AHM VC-M321HM(GY) 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 be used. This service manual covers only those items that differ from the VC-M321HM. For further information on items not covered by this supplement refer to the Service Manual for VC-M321HM. CONTENTS Page SPECIFICATIONS ... 3 ROM MAP ... 4 CIRCUIT DIAGRAMS ... 5 REPLACEMENT PARTS LIST ... 8 PACKING OF THE SET ... 9 SHARP CORPORATION 1 VC-M311HM/LM/AHM VC-M301HM/LM VC-M321HM(GY) PRECAUTIONS IN PART REPLACEMENT When servicing the unit with power on, be careful of the section marked with white around it. This is the primary power circuit which is live. When checking the soldering side in the tape travel mode, make sure first that the tape has been loaded and then turn over the PWB with due care to the primary power circuit. Make readjustment, if needed after replacement of part, with the mechanism and its PWB in position in the main frame. (1) Start and end sensors: Q701 and Q702 Insert the sensor's projection deep into the upper hole of the holder. Referring to the PWB, fix the sensors tight enough. (2) Photocoupler: IC901 Refer to the symbol on the PWB and the anode marking of the part. (3) Cam switches A and B: D708 and D705. Adjust the notch of the part to the white marker of the symbol on the PWB. Do not allow any looseness. (4) Take-up and supply sensors: D711 and D712. Be careful not to confuse the setting direction of the parts in reference to the symbols on the PWB. Do not allow any losseness. 2 VC-M311HM/LM/AHM VC-M301HM/LM VC-M321HM(GY) SPECIFICATIONS Format: Video recording system: Video signal: Recording/playing time: Tape width: Tape speed: Antenna: Receiving channel: RF converter output signal: Power requirement: Power consumption: Operating temperature: Storage temperature: Weight: Dimensions: VIDEO Input: Output: S/N ratio: Horizontal resolution: VHS PAL standard Two rotary heads, helical scan system PAL colour and I signals, 625 lines 240 min max. with an E-240 tape (SP) 480 min max. with an E-240 tape (LP) 12.7mm 23.39 mm/s (PA

File name VCM301HM-BULL1.pdf

VCR990202 VIDEO TECHNICAL BULLETIN MODELS VCM301HM VCM321HM VCMH721HM VCM302HM VCM331HM VCMH73HM Month of Issue: February 1999 Classification: Yellow Page 1 of 2 VCM311HM VCM522HM VCMH731HM VCM312HM VCMH711HM SYMPTOM Failure of the bias oscillator, leading to permanent erase or loss of the linear audio track during record and playback. CAUSE Due to an increase in the localised heat generated by T651, Q651 can go out of tolerance. This may lead to Q652 and R658 failing as well. ACTION Carry out the following circuit change. 1. 2. 3. 4. Replace R658 with the same type. Replace C655 with a 47uF, 16V capacitor. Replace L651 with the one listed below. Replace Q652. If the PWB is damaged so that this component can not be fitted, follow the instructions on page 2 to fit a radical component. 5. Replace Q651 where necessary and bending it away from the transformer, as shown in the diagram below. REF NO R658 C655 L651 Q652 DESCRIPTION Resistor Capacitor Coil Transistor PART NUMBER VRD-RA2EE4R7J VCEA9M1CW476M+ VP-DF221K0000 VSDTC323TS/-1 PRICE CODE AA AA AB AB Push Q651 away from T651 as shown Q651 connections (as viewed from the base of the device) Figure 1: Correct Positioning of Q651 Sharp Electronics (UK) Limited Reference TBT9902066 Revision 4 White ­ Carry out as required Yellow ­ Carry out as required and whenever the unit comes in for service Red ­ Carry out on all units VCR990202 VIDEO TECHNICAL BULLETIN Month of Issue: February 1999 Classification: White Page 2 of 2 C E B Figure 2: Location of Q652 Fit the radial transistor (Q652) as shown in the diagram above. Note that the pin connections of Q652 are the same as Q651. C (collector) to the negative end of C655. E (emitter) to the negative end of C654. B (base) to the jumper wire J176. Sharp Electronics (UK) Limited Reference TBT9902066 Revision 4 White ­ Carry out as required Yellow ­ Carry out as required and whenever the unit comes in for service Red ­ Carry out on all units

File name VCM301HM-BULL2.pdf

VCR2000 04 01 Month of Issue: Classification: VIDEO TECHNICAL BULLETIN MODELS VCM301HM April 2000 White Page 1 of 1 SYMPTOM No motor actions. CAUSE R711 open circuit and IC702 short circuit. ACTION Replace R711 and IC702 using the part numbers given below. REF NO IC702 R711 PART NUMBER VHiBA6978S/-1 VRG-SC2EB1R0J DESCRIPTION Motor Drive IC Resistor, 1R 0.25W PRICE CODE AL AB Sharp Electronics (UK) Limited Reference JR04042000-1 Revision 1 White ­ Carry out as required Yellow ­ Carry out as required and whenever the unit comes in for service Red ­ Carry out on all units

File name VCM311AHM-BULL1.pdf

VCR990801 VIDEO TECHNICAL BULLETIN Month of Issue: August 1999 Classification: White Page 1 of 1 MODELS VCMH721HM VCM311HM VCM301HM VCMH73HM VCMH311AHM VCMH730HM VCM331HM VCMH711HM VCM321HM SYMPTOM The PDC function does not work if the start time minutes are other than 00, 05, 10, 15, 20, 25, 30, 35, 40, 45, 50 or 55. CAUSE ACTION Software bug. Replace IC701 and IC705 from the listing below. Note IC701 for models as follows. RH-IX1417GEN2 VCM331HM, VCMH731HM RH-IX1419GEN4 VCMH721HM, VCM321HM, VCMH73HM, VCMH730HM, VCM311AHM RH-IX1420GEN4 VCM311HM, VCM711HM, VCM301HM REF NO IC701 IC701 IC701 IC705 DESCRIPTION Microprocessor Microprocessor Microprocessor EEPROM PART NUMBER RH-IX1417GEN2 RH-IX1419GEN4 RH-IX1420GEN4 VHISLA2408S-1 PRICE CODE BB AZ AY AF Sharp Electronics (UK) Limited Reference TB-T9905071 Revision 1 White ­ Carry out as required, Yellow ­ Carry out as required and whenever the unit comes in for service, Red ­ Carry out on all units

File name VCM311AHM-BULL2.pdf

VCR991001 VIDEO TECHNICAL BULLETIN Month of Issue: October 1999 Classification: White Page 1 of 1 MODELS VCM301HM VCM331HM VCMH730HM VCM311HM VCMH711HM VCMH731HM VCM311AHM VCM721HM VCM321HM VCMH73HM SYMPTOM In certain circumstances, it may be possible for the VCR to start up automatically from the standby mode. Normally the machine enters the playback mode (if a tape is inserted), plays to the end then rewinds and returns to standby. CAUSE This problem can be caused by a number of reasons 1. Noise on the operate PWB (normally when the display reads 1:16:11 pr1). 2. Erratic operation of the start and/or end sensor. 3. Dry joints on IC701. ACTION Take the following remedial action. 1. Fit SMD capacitors C810 and C812 to the PWB. 2. Replace the start and end sensors. 3. Reflow the solder on IC701. REF NO C810 C812 DESCRIPTION Capacitor, 120pf SMD Capacitor, 120pf SMD PART NUMBER VCCCCY1HH121J VCCCCY1HH121J PRICE CODE AA AA Note that C810 and C812 are located at the front edge of the Main PWB (left hand side as viewed from the front of the machine) Sharp Electronics (UK) Limited Reference TB-T9909072 Revision 1 White ­ Carry out as required, Yellow ­ Carry out as required and whenever the unit comes in for service, Red ­ Carry out on all units

File name VCM311AHM-BULL3.pdf

VCR2000 03 01 Month of Issue: Classification: VIDEO TECHNICAL BULLETIN MODELS VCM301HM VCM331HM VCM730HM VCM311HM VCMH711HM VCMH721HM VCM311AHM VCMH721HM March 2000 White Page 1 of 1 VCM321HM VCMH73HM SYMPTOM This is an addition to technical bulletin number VCR991101. In certain circumstances it may be possible for the VCR to automatically start up from standby mode. The VCR can start up automatically, play to the end of the tape where the end-sensor will action the tape to rewind to the start of the tape and finally eject. CAUSE Electrical noise on the matrix of the operation PWB will cause the unit to set into play mode. This is most likely when the digitron displays 1:16:11 pr1. 1) Main PWB DUNTK5533**** with shuttle. Add 120pF surface mount capacitor to the main PWB at the locations C810 and C812. 2) Main PWB DUNTK5722**** with shuttle. Add capacitor (VCKYD41HB101K 100pF) to two positions, as follows: a) Between RJ107 to GND (Ground). b) AO connector pin 4 to JP237 (GND). 3) Main PWB DUNTK5722**** without shuttle. Delete jumper wires RJ108 and RJ109 (VRS-CY1JF000J) on main PWB located by SW810. Please update your Service Manual with the parts listed below. ACTION REF NO C810 & C812 DESCRIPTION 120pF Capacitor 100pF Capacitor PART NUMBER VCCCCY1HH121J VCKYD41HB101K PRICE CODE AA AA Sharp Electronics (UK) Limited Reference TBT0002086 Revision 1 White ­ Carry out as required Yellow ­ Carry out as required and whenever the unit comes in for service Red ­ Carry out on all units

File name VCM311AHM-BULL4.pdf

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File name VCM311HM-BULL1.pdf

VCR980802 Month of Issue: Classification: VIDEO TECHNICAL BULLETIN August 1998 White Page 1 of 1 MODELS VCM301HM VCM311HM VCM311AHM REASON The colour of the top cabinet has been changed during production. ACTION If different colour top cabinets are required for the models above, please refer to the parts listing below for the correct type. DESCRIPTION Top Cabinet (tornado) Top Cabinet (dark matalic) Top Cabinet (sten grey) PART NUMBER GCABA3116TEV4 GCABA3116TEV2 GCABA3116TEV1 PRICE CODE AR AR AR REF NO 600 600 600 Originator AvW Supervisor Sharp Electronics (UK) Limited Approval Date / / Reference TB-T9806050 White ­ Carry out as required, Yellow ­ Carry out as required and whenever the unit comes in for service, Red ­ Carry out on all units

File name VCM311HM-BULL2.pdf

VCR990203 VIDEO TECHNICAL BULLETIN Month of Issue: Febuary 1999 Classification: White Page 1 of 1 MODELS VCM301HM VCMH73HM VCM311HM VCMH731HM VCMH711HM VCMH721HM SYMPTOM Intermittent reel functions as below. 1. Intermittent fast forward (may occur in standby) 2. Intermittent rewind (may occur in standby) 3. Intermittent play to fast forward or rewind CAUSE ACTION REF NO Q701 Q702 Start and/or end sensor. Change the start and end sensors. DESCRIPTION Start sensor End sensor PART NUMBER RH-PX0233GEZZ RH-PX0233GEZZ PRICE CODE AD AD Sharp Electronics (UK) Limited Reference AVW230299/1 Revision 1 White ­ Carry out as required, Yellow ­ Carry out as required and whenever the unit comes in for service, Red ­ Carry out on all units

File name VCM311HM-BULL3.pdf

VCR990501 Month of Issue: Classification: VIDEO TECHNICAL BULLETIN May 1999 White Page 1 of 1 MODELS VCM301HM VCM321HM VCMH73HM VCM302HM VCM331HM VCMH730HM VCM311HM VCMH711HM VCMH731HM VCM312HM VCMH721HM REASON As the supply of the drum unit has changed from SUKM to SMM, the part numbers of these items have changed as below. ACTION Note the new part numbers for the drum unit only are as listed below. Old Part Number DDRMW0028TEV1 DDRMW0028TEV2 DDRMW0028TEV3 DDRMW0029TEV1 DDRMW0029TEV2 DDRMW0030TEV1 DDRMW0030TEV2 New Part Number DDRMW0028TEX2 DDRMW0028TEX3 DDRMW0028TEX4 DDRMW0029TEX2 DDRMW0029TEX3 DDRMW0030TEX3 DDRMW0030TEX6 The following parts are offered at the same price and include the new parts shown in the table above plus the drum base, drum earth brush, drum motor and screws fitted. Old Part Number DDRMW0028TEX2 DDRMW0028TEX3 DDRMW0028TEX4 DDRMW0029TEX2 DDRMW0029TEX3 DDRMW0030TEX3 DDRMW0030TEX6 New Part Number DDRMV0058TEX2 DDRMV0058TEX4 DDRMV0058TEX7 DDRMV0059TEX2 DDRMV0059TEX4 DDRMV0060TEX3 DDRMV0060TEX8 Sharp Electronics (UK) Limited Reference TB-T9904068 Revision 1 White ­ Carry out as required, Yellow ­ Carry out as required and whenever the unit comes in for service, Red ­ Carry out on all units

File name VCM311HM-BULL4.pdf

VCR990202 VIDEO TECHNICAL BULLETIN MODELS VCM301HM VCM321HM VCMH721HM VCM302HM VCM331HM VCMH73HM Month of Issue: February 1999 Classification: Yellow Page 1 of 2 VCM311HM VCM522HM VCMH731HM VCM312HM VCMH711HM SYMPTOM Failure of the bias oscillator, leading to permanent erase or loss of the linear audio track during record and playback. CAUSE Due to an increase in the localised heat generated by T651, Q651 can go out of tolerance. This may lead to Q652 and R658 failing as well. ACTION Carry out the following circuit change. 1. 2. 3. 4. Replace R658 with the same type. Replace C655 with a 47uF, 16V capacitor. Replace L651 with the one listed below. Replace Q652. If the PWB is damaged so that this component can not be fitted, follow the instructions on page 2 to fit a radical component. 5. Replace Q651 where necessary and bending it away from the transformer, as shown in the diagram below. REF NO R658 C655 L651 Q652 DESCRIPTION Resistor Capacitor Coil Transistor PART NUMBER VRD-RA2EE4R7J VCEA9M1CW476M+ VP-DF221K0000 VSDTC323TS/-1 PRICE CODE AA AA AB AB Push Q651 away from T651 as shown Q651 connections (as viewed from the base of the device) Figure 1: Correct Positioning of Q651 Sharp Electronics (UK) Limited Reference TBT9902066 Revision 4 White ­ Carry out as required Yellow ­ Carry out as required and whenever the unit comes in for service Red ­ Carry out on all units VCR990202 VIDEO TECHNICAL BULLETIN Month of Issue: February 1999 Classification: White Page 2 of 2 C E B Figure 2: Location of Q652 Fit the radial transistor (Q652) as shown in the diagram above. Note that the pin connections of Q652 are the same as Q651. C (collector) to the negative end of C655. E (emitter) to the negative end of C654. B (base) to the jumper wire J176. Sharp Electronics (UK) Limited Reference TBT9902066 Revision 4 White ­ Carry out as required Yellow ­ Carry out as required and whenever the unit comes in for service Red ­ Carry out on all units

File name VCM311HM-BULL5.pdf

VIDEO TECHNICAL BULLETIN MODELS VCM311HM VCMH722HM VCM27HM VCMH68HM VCM312HM VCMH73HM VCM271HM VCMH69HM Month of Issue: Classification: VCR2000 06 01 June 2000 White Page 1 of 1 VCM522HM VCMH731HM VCMH67HM VCMH721HM VCM26HM VCMH675HM SYMPTOM Various faults: · · · · · · · No operation Will not come out of standby EEPROM can not be programmed correctly Erratic or intermittent functions Will not respond to the remote control Will not respond to the front panel buttons Erratic or intermittent timer programming operations CAUSE Microprocessor program crash. All of the models listed above utilise a back-up power facility that maintains the memory inside the main processor in case of a mains power failure. If the mains failure is of reasonable short duration, then all original settings are retained and the unit will continue to function as before the mains interruption (including the retention of any corrupted data). ACTION Discharge back-up capacitor connected to the supply pins of the processor. Sharp Electronics (UK) Limited Reference AVW04062000-2 Revision White Carry out as required Yellow Carry out as required and whenever the unit comes in for service Red Carry out on all units

File name VCM311HM-BULL6.pdf

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