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Parts List Section I Specifications I Alignment for Mechanism I Preparation for Servicing I Exploded views I Disassembly/Assembly of Mechanism I Parts List I Adjustment Procedures I Alignment Procedures of Mechanism I Schematic Diagrams I CBA’s VIDEO CASSETTE RECORDER 27C-250 27C-254 SECAM...
MAIN SECTION VIDEO CASSETTE RECORDER 27C-250/27C-254 Sec. 1: Main Section I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBA’s TABLE OF CONTENTS Specifications................1-1-1 Important Safety Precautions.
SPECIFICATIONS Description Unit Minimum Nominal Maximum Remark 1. Video 1-1. Video Output (PB) Vp-p FL6A 1-2. Video Output (R/P) Vp-p SP Mode, 1-3. Video S/N Y (R/P) W/O Burst 1-4. Video Color S/N AM (R/P) SP Mode 1-5. Video Color S/N PM (R/P) SP Mode 1-6.
IMPORTANT SAFETY PRECAUTIONS Product Safety Notice I. Also check areas surrounding repaired locations. J. Be careful that foreign objects (screws, solder Some electrical and mechanical parts have special droplets, etc.) do not remain inside the set. safety-related characteristics which are often not evi- K.
Safety Check after Servicing Chassis or Secondary Conductor Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original posi- Primary Circuit Terminals tions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.
STANDARD NOTES FOR SERVICING Circuit Board Indications How to Remove / Install Flat Pack-IC a. The output pin of the 3 pin Regulator ICs is indi- 1. Removal cated as shown. With Hot-Air Flat Pack-IC Desoldering Machine:. (1) Prepare the hot-air flat pack-IC desoldering Top View Bottom View machine, then apply hot air to the Flat Pack-IC...
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With Soldering Iron: (4) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply (1) Using desoldering braid, remove the solder from all soldering iron to center of the flat pack-IC and heat pins of the flat pack-IC.
2. Installation Instructions for Handling Semi-conductors (1) Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA Electrostatic breakdown of the semi-conductors may so you can install a replacement flat pack-IC more occur due to a potential difference caused by electro- easily.
PREPARATION FOR SERVICING How to Enter the Service Mode About Optical Sensors Caution: An optical sensor system is used for the Tape Start and End Sensors on this equipment. Carefully read and follow the instructions below. Otherwise the unit may operate erratically. What to do for preparation Insert a tape into the Deck Mechanism Assembly and press the PLAY button.
CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart (1): Identification (location) No. of parts in the figures (2): Name of the part This flowchart indicates the disassembly steps to gain (3): Figure Number for reference access to item(s) to be serviced. When reassembling, (4): Identification of parts to be removed, unhooked, follow the steps in reverse order.
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[7] Cylinder Shield Cylinder Assembly FE Head (S-7) SW507 LD-SW AC Head Assembly [6] Main CBA [5] Deck Assembly [5] Deck Assembly Cam Gear Hole [6] Main CBA Shaft (S-6) Hole LD-SW [6] Main CBA Fig. 6 (S-6) TOP VIEW From Capstan Motor From...
ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: "CBA" is an abbreviation for Head Switching Position Adjustment "Circuit Board Assembly." Purpose: NOTE: To determine the Head Switching point during 1.Electrical adjustments are required after replacing playback. circuit components and certain mechanical parts. Symptom of Misadjustment: It is important to do these adjustments only after all repairs and replacements have been com- May cause Head Switching noise or vertical jitter...
Video Block Diagram Comparison Chart of Models & Marks Model Mark 27C-250 27C-254 REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC IC640 (VPS) MAIN CBA DAVN-L IC501 (OSD) FROM DAVN-L IIC-BUS SDA SERVO/SYSTEM IIC-BUS SDA CONTROL BLOCK IIC-BUS SCL IIC-BUS SCL CHARACTER...
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Power Supply Block Diagram CAUTION CAUTION ! NOTE : FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using If Main Fuse (F001) is blown, check to see that all components in the power supply REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
The following symbols will appear on the indicator panel to indicate the current mode or operation of the VCR. On-screen modes will also be momentarily displayed on the tv screen when you press the operation buttons. Display panel [ 27C-250 ] VEILLE FONCTION...
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS Standard Notes Notes: WARNING 1. Do not use the part number shown on these draw- ings for ordering. The correct part number is shown Many electrical and mechanical parts in this chassis in the parts list, and may be slightly different or have special characteristics.
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LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F001) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.
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Main 1/7 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK 27C-250 27C-254 1-8-3 1-8-4 HE244SCM1...
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Main 3/7 Schematic Diagram 1-8-7 1-8-8 HE244SCM3...
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Main 4/7 & Jack Schematic Diagram HE244SCM4 1-8-9 1-8-10...
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Main 5/7 Schematic Diagram CAUTION ! NOTE : CAUTION ! For continued protection against fire hazard, The voltage for parts in hot circuit is measured using Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
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Main 6/7 Schematic Diagram 1-8-13 1-8-14 HE244SCM6...
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Main 7/7 Schematic Diagram ( B ) Comparison Chart of Models and Marks MODEL MARK 27C-250 27C-254 HE249SCM7 1-8-15 1-8-16...
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Main CBA Top View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! For continued protection against fire hazard, SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
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Main CBA Bottom View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! For continued protection against fire hazard, SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
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Jack CBA Top View Jack CBA Bottom View BHE470F01012-C 1-8-21 1-8-22...
WAVEFORMS (TP301 of Main CBA) UPPER (TP502 of Main CBA) LOWER C-PB 10mV x 10 RF-SW 0.5V x 10 5msec (J23 of Main CBA) UPPER (TP502 of Main CBA) LOWER V-OUT 0.1V x 10 RF-SW 0.5V x 10 50usec (J23 of Main CBA) V-OUT E-E 10usec 50mV x 10...
WIRING DIAGRAM AC CORD Comparison Chart of Models & Marks ANT-IN ANT-OUT Model Mark 27C-250 27C-254 SENSOR CBA (BHB300F01014) SENSOR CBA (BHB300F01014) (DECK ASSEMBLY) AC HEAD ASSEMBLY CL151 CL101 CL287 CL504 1 V-OUT1 AUDIO AE-H AE-H ERASE HEAD AE-H/FE-H AE-H/FE-H...
Comparison Chart of Models and Marks Signal Active Mark Function Name Level Model Mark OUT RF-SW Video Head Switching Pulse 27C-250 N.U. Not Used 27C-254 N.U. Not Used DAVN-L VPS/PDC Data IC501( SERVO / SYSTEM CONTROL IC ) Receive = “L” N.U. Not Used “H”...
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Signal Active Signal Active Mark Function Mark Function Name Level Name Level Clock Output for OUT OSC C BUS Control letter size BUS- Clock Not Used C BUS Control BUS- Data FSC-IN 4.43MHz Clock [4.43MH Input OUT P-OFF- Power Off at High OSDVs OSDVss N.U.
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Signal Active Mark Function Name Level OUT CTL (+) Playback/Record Control Signal (+) CTL AMP AMPC Connected Terminal CTLAM To Monitor for PULSE Pout CTL AMP Output AMPVc AMPVcc A/D Converter Power Input/ AVcc Standard Voltage Input Tuner IF Output Signal Notes: Abbreviation for Active Level:...
LEAD IDENTIFICATIONS 2SC1815-BL(TPE2) BN1L4M-T 2SK3566 2SC1815-Y(TPE2) BN1F4M-T 2SC1815-GR(TPE2) BA1F4M-T 2SC2120-Y(TPE2) KTA1266(GR) KTC3203(Y) KTC3199(Y,GR,BL) 2SA1020(Y) 2SC2785(J.H.F.K) KTC3205(Y) KRA103M 2SA1015-GR(TPE2) KRC103M KRA104M KTA1281(Y) G D S E C B E C B PT204-6B-12 MID-32A22 CAT24WC04JI LTV-817(B.C)-F BR24C04F-W EL817(A,B,C) KTA1504GR-RTK RN1511(TE85R) CD4052BCSJX KTA1504Y-RTK BU4052BCF-E2 FMG4A T148 KTC3875Y-RTK...
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DECK MECHANISM SECTION VIDEO CASSETTE RECORDER 27C-250/27C-254 Sec. 2: Deck Mechanism Section I Standard Maintenance I Alignment for Mechanism I Disassembly/Assembly of Mechanism I Alignment Procedures of Mechanism TABLE OF CONTENTS Standard Maintenance..............2-1-1 Service Fixtures and Tools.
STANDARD MAINTENANCE Service Schedule of Components H: Hours : Check I: Change Deck Periodic Service Schedule Ref.No. Part Name 1,000 H 2,000 H 3,000 H 4,000 H Cylinder Assembly Loading Motor Assembly Pulley Assembly B587 Tension Lever Assembly AC Head Assembly B573,B574 Reel S, Reel T Capstan Motor...
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Cleaning Cleaning of Audio Control Head Clean the head with a cotton swab. Cleaning of Video Head Procedure Clean the head with a head cleaning stick or chamois 1.Remove the top cabinet. cloth. 2.Dip the cotton swab in 90% isopropyl alcohol and Procedure clean the audio control head.
SERVICE FIXTURE AND TOOLS J-1-1, J-1-2 Ref. No. Name Part No. Adjustment J-1-1 Alignment Tape FL6A Head Adjustment of Audio Control Head J-1-2 Alignment Tape FL6N8 Azimuth and X Value Adjustment of Audio Control (1 speed only) Head / Adjustment of Envelope Waveform FL6NS8 (2 speed only) Guide Roller Adj.Screwdriver...
MECHANICAL ALIGNMENT PROCEDURES Explanation of alignment for the tape to correctly run B. Method to place the Cassette Holder in the tape- starts on the next page. Refer to the information below loaded position without a cassette tape on this page if a tape gets stuck, for example, in the 1.
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1.Tape Interchangeability Alignment Note: To do these alignment procedures, make sure that the Tracking Control Circuit is set to the center position every time a tape is loaded or unloaded. (Refer to page 2-3-4, procedure 1-C, step 2.) Equipment required: Dual Trace Oscilloscope VHS Alignment Tape (FL6NS8) Guide Roller Adj.
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1-A. Preliminary/Final Checking and 3. Check to see that the tape runs without creasing at Alignment of Tape Path Take-up Guide Post [4] or without snaking between Guide Roller [3] and AC Head. (Fig. M3 and M5) Purpose: 4. If creasing or snaking is apparent, adjust the Tilt To make sure that the tape path is well stabilized.
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1-D. Azimuth Alignment of Audio/Con- 6. Press CH DOWN button on the unit until the CTL waveform has shifted from its original position (not trol/ Erase Head the position achieved in step 5, but the position of Purpose: CTL waveform in step 4) by approximately -2msec. To correct the Azimuth alignment so that the Audio/ Make sure that the envelope is simply attenuated Control/Erase Head meets tape tracks properly.
DISASSEMBLY/ASSEMBLY PROCEDURES OF DECK MECHANISM Before following the procedures described below, be sure to remove the deck assembly from the cabinet. (Refer to CABINET DISASSEMBLY INSTRUCTIONS on page 1-5-1.) All the following procedures, including those for adjustment and replacement of parts, should be done in Eject mode;...
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REMOVAL INSTALLATION STEP START- REMOVE/*UNHOOK/ /LOC. PART ADJUSTMENT Fig. No. UNLOCK/RELEASE/ CONDITION UNPLUG/DESOLDER Loading Arm (SP) (+)Refer to Alignment [34] [26] DM2,DM14 Assembly Sec.Pg.2-4-8 Loading Arm (TU) (+)Refer to Alignment [35] [34] DM2,DM14 Assembly Sec.Pg.2-4-8 M Brake (TU) Assembly [36] [16],[26] DM1,DM15 (HI)
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(S-1) (S-1) (L-1) (L-3) (L-2) (P-1) Fig. DM5 [49] Fig. DM3 [50] Pin D (L-12) Pin C Pull up Slide Pin A Pin B Slot A (S-2) Slots B Slot A First, while pushing the locking tab as shown in the right, slide and pull up the right side on [2] to release Pin A and Pin B from the slots A.
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(S-4) (S-5) [14] (S-6) [15] Desolder from bottom (S-3) Lead with White Stripe Belt View for A Fig. DM7 Fig. DM9 Adj. Screw [11] [17] (L-4) (L-5) (P-3) [16] [13] [18] [12] (P-4) [10] (P-2) (S-7) Pin of [12] Pin of [10] Fig.
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[26] (S-8) (C-3) (S-9) (L-8) [23] (L-7) [24] (C-5) (C-4) (C-2) [28] [25] [29] [30] [19] Cap Belt [27] Fig. DM11 turn (C-1) [22] [20] (L-6) [31] [21] Position of Mode Lever when installed Pin of [37] Pin of [33] Pin of [36] Bottom View [26]...
ALIGNMENT PROCEDURES OF MECHANISM The following procedures describe how to align the Alignment 1 individual gears and levers that make up the tape load- Loading Arm (SP) and (TU) Assembly ing/unloading mechanism. Since information about the state of the mechanism is provided to the System Install Loading Arm (SP) and (TU) Assembly so that Control Circuit only through the Mode Switch, it is their triangle marks point to each other as shown in...
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EXPLODED VIEWS AND PARTS LIST SECTION VIDEO CASSETTE RECORDER 27C-250/27C-254 Sec. 3: Exploded views and Parts List Section I Exploded views I Parts List TABLE OF CONTENTS Exploded Views ............... . 3-1-1 Mechanical Parts List.
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Packing [ A ] [ B ] X20A X20B X20C Comparison Chart of Models and Marks Model Mark 27C-250 27C-254 Unit Some Ref. Numbers are not in sequence. 3-1-3 HE244PEX...
Comparison Chart of Models and Marks X20A! OWNER'S MANUAL(FRENCH) HE249FD 0VMN03530 X20B! OWNER'S MANUAL(ITALIAN) HE249FD 0VMN03531 Model Mark X20C! OWNER'S MANUAL(GERMAN) HE249FD 0VMN03532 27C-250 27C-254 Ref. No. Mark Description Part No. FRONT ASSEMBLY HE244FD 0VM204129 FRONT ASSEMBLY HE249FD 0VM204150 CASE, TOP(ANTHRACITE) HE240ED 0VM101267 CHASSIS HE470ED...
CHIP CERAMIC CAP . F Z 0.1µF/25V or CHD1EZ30F104 Model Mark CHIP CERAMIC CAP . FZ Z 0.1µF/50V CHD1JZ3FZ104 27C-250 C153 CHIP CERAMIC CAP . F Z 0.1µF/50V or CHD1JZ30F104 27C-254 CHIP CERAMIC CAP . F Z 0.1µF/25V or CHD1EZ30F104 CHIP CERAMIC CAP .
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP CERAMIC CAP . F Z 0.1µF/25V or CHD1EZ30F104 C370 CHIP CERAMIC CAP . B K 0.01µF/50V CHD1JK30B103 CHIP CERAMIC CAP . FZ Z 0.1µF/50V CHD1JZ3FZ104 C371 CHIP CERAMIC CAP . B K 0.022µF/50V or CHD1JK30B223 C314 CHIP CERAMIC CAP .
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C431 CHIP CERAMIC CAP . B K 0.01µF/50V CHD1JK30B103 C704 CHIP CERAMIC CAP . B K 0.01µF/50V CHD1JK30B103 C501 ELECTROLYTIC CAP . 220µF/6.3V M H7 CE0KMAVSL221 C706 CHIP CERAMIC CAP . B K 1000pF/50V CHD1JK30B102 C502 CHIP CERAMIC CAP .
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CARBON RES. 1/4W J 3.3k Ω D057 RCX4JATZ0332 L851 INDUCTOR 1.8µH-K-26T LLAXKATTU1R8 D058 ZENER DIODE DZ-33BSDT265 or NDTD00DZ33BS TRANSISTORS ZENER DIODE MTZJT-7733D QDTD00MTZJ33 Q001 FET 2SK3566 QFWZ02SK3566 D153 ZENER DIODE DZ-11BSAT265 or NDTA00DZ11BS Q002...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CARBON RES. 1/6W J 1k Ω or RES. BUILT-IN TRANSISTOR BA1F4M-T QQSZ00BA1F4M R027 RCX6JATZ0102 CARBON RES. 1/4W J 1k Ω Q562 TRANSISTOR KTC3199(Y) or NQSY0KTC3199 RCX4JATZ0102 CARBON RES. 1/4W J 1M Ω TRANSISTOR KTC3199(GR) or NQS10KTC3199 R028...
DECK PARTS LIST NOTE: Ref. No. Description Part No. Four different, but interchangeable, types of B558 PINCH ARM(A) ASSEMBLY(5) MK12 0VSA13788 (LOADING MOTOR) may be installed in these models. B411 PINCH SPRING MK12 0VM414644 Please confirm B558 (LOADING MOTOR) type by a B414 M BRAKE(SP) ASSEMBLY(HI) MK12 0VSA13655...
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Ref. No. Description Part No. L1053 SCREW, S-TIGHT M2.6X8 WASHER HEAD+ GCMS9080 L1151 SCREW, SEMS M3X4 PAN HEAD + or CPM33040 SCREW, SEMS M2.6X4 PAN HEAD+ CPM39040 L1191 SCREW, S-TIGHT M2.6X8 WASHER HEAD+ GCMS9080 L1321 SCREW, S-TIGHT M3X6 BIND HEAD+ GBMS3060 L1406 AC HEAD SCREW MK9...