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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 27A-650/27A-654...
MAIN SECTION VIDEO CASSETTE RECORDER 27A-650/27A-654 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.
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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.
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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.
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...
BLOCK DIAGRAMS Servo/System Control Block Diagram Comparison Chart of Models & Marks Model Mark 27A-650 IC501 AL+5V TP507 (SERVO/SYSTEM CONTROL) MAIN CBA SW507 27A-654 SENS-INH RS501 LD-SW REMOTE D502 REMOCON-IN KEY- 1 SENSOR SWITCH S-LED Q504 AL+5V LD-SW KEY- 2...
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Video Block Diagram Comparison Chart of Models & Marks Model Mark REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC 27A-650 27A-654 MAIN CBA IC640 (VPS) DAVN-L FROM DAVN-L IC501 (OSD) IIC-BUS SDA SERVO/SYSTEM IIC-BUS SDA CONTROL BLOCK IIC-BUS SCL IIC-BUS SCL VPS-V...
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Audio Block Diagram PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC MAIN CBA N-A-PB TO Hi-Fi N-A-REC AUDIO BLOCK IC301 (AUDIO SIGNAL PROCESS) TUNER PB-ON LINE MUTE (DECK ASSEMBLY) SP/LP-ON ACE HEAD ASSEMBLY REC-ON Q401 CL287 CL504 A-PB/REC AUDIO 4 A-PB/REC Q402 HEAD A-COM...
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Hi-Fi Audio Block Diagram PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC JACK CBA CL509 JK751 MAIN CBA A-OUT1(L) A-OUT JK101 CL101 CL151 A-OUT1(R) A-IN1(R) A-IN1(R) A-IN1(L) A-IN1(L) A-OUT A-OUT1(R) 6 A-OUT1(R) A-OUT1(L) A-OUT1(L) 12 SUB JACK CBA JK102 CL102 CL152 A-IN2(R) A-IN2(R) A-IN2(L)
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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.
FUNCTION INDICATOR SYMBOLS Note: 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 "...
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 27A-650 27A-654 1-8-3 1-8-4 HE450SCM1...
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Main 3/7 Schematic Diagram 1-8-7 1-8-8 HE450SCM3...
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Main 4/7 & Jack Schematic Diagram HE450SCM4 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 HE450SCM6...
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Main 7/7 Schematic Diagram ( B ) Comparison Chart of Models and Marks MODEL MARK 27A-650 27A-654 HE4F2SCM7 1-8-15 1-8-16...
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ALSO , IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT If Main Fuse (F1001) is blown, check to see that all components in the power supply 27A-650 SLOWLY , WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY circuit are not defective before you connect the AC plug to the AC power supply.
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SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. If Main Fuse (F1001) is blown, check to see that all components in the power supply 27A-650 ALSO , IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT circuit are not defective before you connect the AC plug to the AC power supply.
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ALSO , IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT If Main Fuse (F1001) is blown, check to see that all components in the power supply 27A-650 SLOWLY , WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY circuit are not defective before you connect the AC plug to the AC power supply.
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SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. If Main Fuse (F1001) is blown, check to see that all components in the power supply 27A-650 ALSO , IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT circuit are not defective before you connect the AC plug to the AC power supply.
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Jack CBA Top View ( A ) Comparison Chart of Models and Marks MODEL MARK 27A-650 27A-654 Jack CBA Bottom View ( A ) BHE470F01012-C 1-8-27 1-8-28...
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Jack CBA Top View ( B ) Comparison Chart of Models and Marks MODEL MARK 27A-650 27A-654 Jack CBA Bottom View ( B ) BHE470F01013-C 1-8-29 1-8-30...
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Sub Jack CBA Top View ( A ) Sub Jack CBA Bottom View ( A ) Comparison Chart of Models and Marks MODEL MARK 27A-650 27A-654 BHE470F01012-B Sub Jack CBA Top View ( B ) Sub Jack CBA Bottom View ( B ) BHE470F01013-B...
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...
Comparison Chart of AC CORD FRONT Models & Marks Model Mark VIDEO AUDIO AUDIO IN (R) IN (L) ANT-IN ANT-OUT 27A-650 27A-654 CN701 SENSOR CBA 1 NU (BHB300F01014) 3 GND AFV CBA TU-AUDIO(R) (DECK ASSEMBLY) SENSOR CBA (BHC400F01091) TU-AUDIO(L) (BHB300F01014)
Signal Active Mark Function Name Level Model Mark Video Head OUT H-A-SW Amp Switching 27A-650 Pulse 27A-654 Head Amp IN H-A-COMP Comparator Signal IC501( SERVO / SYSTEM CONTROL IC ) Video Head “H” ≥ 4.5V, “L” ≤ 1.0V OUT RF-SW...
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Signal Active Signal Active Mark Function Mark Function Name Level Name Level Main Clock LED Clock OUT X-OUT OUT DRV-STB Input Driver IC Chip Select Signal Vss(GND) LED Clock N.U. Not Used OUT DRV-CLK Driver IC Control Clock N.U. Not Used OUT IIC BUS- SCL I C BUS Clock Select...
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Signal Active Mark Function Name Level AMPVREF V-Ref for CTL V-Ref for CTL AMPVREF P80/C P80/C Terminal Playback/ OUT CTL - Record Control Signal (-) Playback/ OUT CTL + Record Control Signal (+) CTL AMP AMPC Connected Terminal To Monitor for CTLAMPout CTL AMP Output...
LEAD IDENTIFICATIONS 2SC1815-BL(TPE2) LTV-817(B.C)-F BN1L4M-T 2SC1815-Y(TPE2) EL817(A,B,C) BN1F4M-T 2SC1815-GR(TPE2) BA1F4M-T 2SC3266-Y (TPE2) KTA1266(GR) 2SC2120-Y(TPE2) KTC3199(Y,GR,BL) KTC3203(Y) 2SC2785(J.H.F.K) 2SC1815-BL(TPE2) KRA103M 2SA1020(Y) KRC103M KTC3205(Y) KRA104M 2SA1015-GR(TPE2) KTA1281(Y) E C B E C B PT204-6B-12 CAT24WC04JI LC74793JM-TRM MID-32A22 PT-6958-FN-TP BR24C04F-W MSP3407G-QG-B8 KTA1504GR-RTK MSP3407G-QG-B8-V3 RN1511(TE85R) KTA1504Y-RTK FMG4A T148...
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DECK MECHANISM SECTION VIDEO CASSETTE RECORDER 27A-650/27A-654 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 27A-650/27A-654 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.
0VMN03519 Parts that are not assigned part numbers (---------) are SERVICE CENTER LIST HC2C0ED 0VMN03071 not available. Comparison Chart of Models and Marks Model Mark 27A-650 27A-654 Ref. No. Mark Description Part No. FRONT ASSEMBLY HE450ED 0VM204197 CASE, TOP(ANTHRACITE) HE240ED...
CHD1JZ3FZ104 C157 ELECTROLYTIC CAP . 1µF/50V M H7 CE1JMAVSL1R0 Model Mark C158 CHIP CERAMIC CAP . B K 1000pF/50V CHD1JK30B102 27A-650 C251 ELECTROLYTIC CAP . 10µF/16V M H7 CE1CMAVSL100 27A-654 C252 CHIP CERAMIC CAP . B K 1000pF/50V CHD1JK30B102 C253 ELECTROLYTIC CAP .
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C321 CHIP CERAMIC CAP . F Z 0.1µF/50V or CHD1JZ30F104 C415 ELECTROLYTIC CAP . 10µF/16V M H7 CE1CMAVSL100 CHIP CERAMIC CAP . F Z 0.1µF/25V or CHD1EZ30F104 C416 CHIP CERAMIC CAP .
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C478 ELECTROLYTIC CAP . 4.7µF/25V M H7 CE1EMAVSL4R7 C561 CHIP CERAMIC CAP . B K 0.022µF/50V or CHD1JK30B223 C479 ELECTROLYTIC CAP . 4.7µF/25V M H7 CE1EMAVSL4R7 CHIP CERAMIC CAP . B K 0.022µF/25V CHD1EK30B223 C480 CHIP CERAMIC CAP .
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 IC640 IC:VPS/PDC SLICER LC74793JM-TRM QSZBA0TSY018 D008 SWITCHING DIODE 1N4148M or NDTZ01N4148M COILS SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 L001 BEAD CORE B16 RH 3.5X10X1.3 XL03010XM001 D009 SWITCHING DIODE 1N4148M or NDTZ01N4148M L002...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 22k Ω TRANSISTOR 2SA1020(Y) QQSY02SA1020 R018 RRXAJR5Z0223 CHIP RES.(1608) 1/10W J 22k Ω Q058 RES. BUILT-IN TRANSISTOR KRC103M or NQSZ0KRC103M R021 RRXAJR5Z0223 CHIP RES.(1608) 1/10W J 1.5k Ω RES.
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 10k Ω CHIP RES.(1608) 1/10W J 10k Ω R331 RRXAJR5Z0103 R475 RRXAJR5Z0103 CHIP RES.(1608) 1/10W J 33 Ω R332 CHIP INDUCTOR MLG1608B18NJT000 or LLACJB3TE18N R476 RRXAJR5Z0330 CHIP RES.(1608) 1/10W J 33 Ω...
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Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 10k Ω R556 RRXAJR5Z0103 TACT SWITCH TC-1104(H=9.5) SST0101DNG01 CHIP RES.(1608) 1/10W J 10k Ω R557 RRXAJR5Z0103 MISCELLANEOUS CHIP RES.(1608) 1/10W J 56k Ω R566 RRXAJR5Z0563 HEAD SHIELD ASSEMBLY HE470ED 0VM414333...
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Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/6W J 680 Ω or CHIP CERAMIC CAP . CG J 470pF/50V CHD1JJ3CG471 R125 RCX6JATZ0681 CARBON RES. 1/4W J 680 Ω C104 CHIP CERAMIC CAP . CH J 470pF/50V or CHD1JJ3CH471 RCX4JATZ0681 CHIP RES.(1608) 1/10W J 220 Ω...
DECK PARTS LIST NOTE: Ref. No. Description Part No. Four different, but interchangeable, types of B558 B414 M BRAKE(SP) ASSEMBLY(HI) MK12 0VSA13655 (LOADING MOTOR) may be installed in these models. B416 M BRAKE(TU) ASSEMBLY(HI) MK12 0VSA13449 Please confirm B558 (LOADING MOTOR) type by a B417 TENSION SPG(3002654) MK12 0VM414221E...