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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MA094B 2005/3 CASSETTE RECEIVER MA094B20053 KS-F185,KS-F185S,KS-F185G TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2、 . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. . . . . . 1-5 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . 1-17 Area suffix UN - Indonesia KS-F185S Area suffix UN - Indonesia KS-F185G Area suffix KS-F185 UH - Thailand UN - Indonesia U - Other Areas RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA094B) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SE
5、CTION Maximum Power OutputFront45 W per channel Rear45 W per channel Continuous Power Output (RMS) Front17 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear17 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load I
6、mpedance4 (4 to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance1.0 V/20 k load (250 nWb/m) TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 602 kHz FM TunerUsable Sens
7、itivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation35 dB Capture Ratio2.0 dB AM TunerSensitivity20 V Selectivity35 dB CASSETTE DECK SECTION Wow & Flutter0.15% (WRMS) Fast-Wind
8、Time190 sec. (C-60) Frequency Response50 Hz to 14 000 Hz (Normal tape) Signal-to-Noise Ratio52 dB Stereo Separation40 dB GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installati
9、on Size (approx.)182 mm 52 mm 150 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.3 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA094B)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay atten
10、tion to such burrs in the case of preforming repair of this system. RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA094B) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1HOW TO IDENTIFY MODELS 2.1.1NAME PLATE Discernment sign (No.MA094B)1-5 SECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the front panel assembly (See
11、 Fig.1) (1) Push the detach button and remove the front panel assem- bly. Fig.1 3.1.2Removing the bottom cover (See Fig.2) Prior to performing the following procedures, remove the front panel assembly. (1) Turn the body upside down. (2) Insert a screwdriver under the joints to release the two joints
12、 a on the left side, the two joints b on the right side and the joint c on the back of the body, then remove the bottom cover from the body. CAUTION: When releasing the joints using a screwdriver, do not damage the board. Fig.2 3.1.3Removing the front chassis assembly (See Fig.3) Prior to performing
13、 the following procedures, remove the front panel assembly and bottom cover. (1) Remove the two screws A on each side of the body. (2) Release the two joints d and the two joints e on the sides, then remove the front chassis assembly toward the front. Fig.3 Front panel assembly Detach button Bottom
14、cover Joint b Joint b Joint c Joint a Joint a Joint d Front chassis assembly A Joint e Joint dJoint e 1-6 (No.MA094B) 3.1.4Removing the heat sink (See Fig.4) Prior to performing the following procedure, remove the front panel assembly. (1) Remove the screw B and two screws C attaching the heat sink
15、on the left side of the body, and remove the heat sink. Fig.4 3.1.5Removing the rear panel (See Fig.5) Prior to performing the following procedure, remove the front panel assembly and bottom cover. (1) Remove the two screws D , screw E and three screws F at- taching the rear panel on the back of the
16、 body. Fig.5 3.1.6Removing the main board (See Fig.6) Prior to performing the following procedures, remove the front panel assembly, bottom cover, front chassis assembly, heat sink and rear panel. (1) Remove the two screws G attaching the main board on the top chassis. (2) Disconnect the two connect
17、ors (CN901 and CN721) on the main board from the cassette mechanism assembly. Fig.6 Heat sink CBC D FRear panelF E D G G Main board CN901 CN721 (No.MA094B)1-7 3.1.7Removing the cassette mechanism assembly (See Fig.7) Prior to performing the following procedure, remove the front panel assembly, botto
18、m cover, front chassis assembly, heat sink, rear panel and main board. (1) Remove the four screws H attaching the cassette mecha- nism assembly from the top chassis. Fig.7 3.1.8Removing the head amplifier board (See Fig.8) Prior to performing the following procedures, remove the front panel assembly
19、, bottom cover, front chassis assembly, heat sink, rear panel, main board and cassette mechanism assem- bly. (1) Disconnect the wire from CJ901 on the head amplifier board. (2) Remove the one screw J attaching the head amplifier board. (3) Move the head amplifier board in the direction of the arrow
20、to release the two joints f, the head amplifier board can be removed. Fig.8 3.1.9Removing the relay board (See Fig.9) Prior to performing the following procedures, remove the front panel assembly, bottom cover, front chassis assembly, heat sink, rear panel, main board and cassette mechanism assem- b
21、ly. (1) Disconnect the wire from CP722 on the relay board. (2) Remove the one screw K attaching the relay board. (3) Move the relay board in the direction of the arrow to release the joint g, the relay board can be removed. Fig.9 H H HH Top chassis Cassette mechanism assembly J CJ901 Head amplifier
22、board Joint f Joint f To head relay board K CP722Relay board Joint g 1-8 (No.MA094B) 3.1.10 Removing the mecha bracket (See Fig.10) Prior to performing the following procedure, remove the front panel assembly, bottom cover, front chassis assembly, heat sink, rear panel, main board, cassette mechanis
23、m assembly, head amplifier board and relay board. (1) Remove the four screws L attaching the mecha bracket. Fig.10 3.1.11 Removing the front board (See Fig.11 to 13) Prior to performing the following procedures, remove the front panel assembly. (1) Remove the four screws M attaching the rear cover o
24、n the back of the front panel assembly. (See Fig.11) (2) Release the nine joints h, the front panel and the rear cover become separate. (See Fig.12) (3) Remove the front board from the rear cover. (See Fig.13) Caution: Take care not to lose the springs. Fig.11 Fig.12 Fig.13 Mecha bracket L L L L MFr
25、ont panel assembly MM M Joint h Joint h Joint h Front board (No.MA094B)1-9 3.2Cassette mechanism assembly Prior to performing the following procedures, remove the head amplifier board, the relay board and the mechanism bracket. 3.2.1Removing the direction switch board (See Fig.1) (1) Unsolder the th
26、ree wires a on the direction switch board. (2) Remove the one screw A attaching the direction switch board. 3.2.2Removing the FF / REW lever assembly (See Fig.1) (1) Remove the screw B attaching the FF / REW lever assem- bly on the back of the cassette mechanism assembly. (2) Remove the screw C on t
27、he upper side of the FF / REW lever assembly. (3) Lift and pull forward the FF / REW lever assembly to disen- gage the joints b, c, d and e. 3.2.3Reattaching the FF / REW lever assembly (See Fig.1) (1) Reattach the FF / REW lever assembly to the joint c on the back of the chassis. (2) Reattach the p
28、inch-roller shaft e, the change lever d and the return link e to the chassis. Fig.1 3.2.4Removing the playback head (See Fig.2) Prior to performing the following procedure, remove the direc- tion switch board and the FF / REW lever assembly. (1) Remove the screw D attaching the playback head. (2) Re
29、move the C washer and pull out the FF roller. (3) Remove the S support plate, the A arm spring (a) and (b), the playback head. ATTENTION: The A arm spring (a) differs from the A arm spring (b). 3.2.5Removing the pinch-roller (R) and (F) assembly (See Fig.2) Prior to performing the following procedur
30、e, remove the direc- tion switch board and the FF / REW lever assembly. (1) Remove the P arm spring (f) in the pinch-roller (F) assem- bly from the chassis. (2) Remove the P arm spring (r) in the pinch-roller (R) assem- bly from the chassis. (3) Draw out the pinch roller (F) and (R) assembly from th
31、e shaft. ATTENTION: The P arm spring (f) differs from the P arm spring (r). ATTENTION: The pinch roller (F) assembly differs from the pinch roller (R) assembly. Fig.2 C FF / REW lever assembly Joint c Joint b B A Direction switch board Joint d Joint e Soldering a A arm spring (b) A arm spring (a) Pi
32、nch-roller (R) assembly Pinch-roller (F) assembly Shaft Shaft S support plate D C washer P arm spring (f)P arm spring (r) Remove the P arm spring (f) from the chassis. Remove the P arm spring (r) from the chassis. Playback head FF roller 1-10 (No.MA094B) 3.2.6Removing the cassette hanger / cassette
33、holder (See Fig.3) Prior to performing the following procedure, remove the FF / REW lever assembly. (1) From the rear of the unit, bend the two tabs f outwards and disengage the two joints g in the direction of the arrow. (2) Push the eject lever and remove the cassette holder from the playback head
34、. Disengage the two joints h of the cas- sette hanger / cassette holder and the eject lever in the di- rection of the arrow. (3) Lift the cassette hanger / cassette holder and disengage the joint i of the return link and the eject lever. Fig.3 3.2.7Removing the reel disc assembly (See Fig.4) Prior t
35、o performing the following procedure, remove the FF / REW lever assembly and the cassette hanger / cassette hold- er. (1) Remove the C washer and pull out reel disc assembly. ATTENTION: Replace with a new C washer when reattaching. Fig.4 3.2.8Removing the motor assembly (See Fig.5) (1) Unsolder the
36、two wires j on the motor assembly. (2) Turn over the cassette mechanism assembly and remove the main belt and the sub-belt from the motor pulley. ATTENTION: The main belt can now be removed. (3) Remove the two screws G attaching the motor assembly. Fig.5 Cassette holder Cassette hanger Return link J
37、oint i Eject lever Joint h Joint h Joint g Joint g Tab f Tab f Chassis Reel disc assembly C washer C washer Flywheel (BF) Flywheel (BR) E E E F G G Main-belt Reel base assembly Sub-belt Motor assembly Motor pulley Soldering j (No.MA094B)1-11 3.2.9Removing the Flywheel (BF) and (BR) assembly (See Fig
38、.4 and 5) Prior to performing the following procedure, remove the cas- sette hanger / cassette holder. (1) From the upper side of the cassette mechanism assembly, remove the C washer from each shaft of the flywheel (BF) and (BR). (2) Turn over the cassette mechanism assembly and remove the main belt
39、. Pull out the flywheel (BF) and (BR) down- ward respectively. Fig.4 Fig.5 3.2.10 Removing the reel base assembly (See Fig.5 and 6) (1) Raise the part k of the reel base assembly slightly and re- move the selector link (B) on the front side of the cassette mechanism assembly by turning it as shown i
40、n Fig.6. (2) Remove the three screws E and the one screw F on the underside of the cassette mechanism assembly. ATTENTION: The reel base assembly is not repairable. Handle with care. Fig.6 Fig.7 Reel disc assembly C washer C washer Flywheel (BF) Flywheel (BR) E E E F G G Main-belt Reel base assembly
41、 Sub-belt Motor assembly Motor pulley Soldering j Selector link (B). Pinch-roller (R) assembly Turn the selector link (B). k Inside of the reel base assembly 1-12 (No.MA094B) 3.2.11 Removing the mute switch board (See Fig.8) (1) Unsolder the two wires l on the mute switch board on the back of the ca
42、ssette mechanism assembly. (2) Remove the screw H attaching the mute switch board. Fig.8 3.2.12 Removing the power switch (See Fig.9) Prior to performing the following procedure, remove the motor assembly. (1) Unsolder the two wires m on the power switch on the side of the cassette mechanism assembl
43、y. (2) Remove the screw I attaching the power switch. Fig.9 Cassette mechanism assembly Soldering l H Mute switch board Rower switch Motor assembly Soldering m I Power switch Cassette mechanism assembly (No.MA094B)1-13 SECTION 4 ADJUSTMENT 4.1Adjustment method ? ? Test instruments required for adjus
44、tment (1) Digital oscilloscope (100MHz) (2) Frequency counter meter (3) Electric voltmeter (4) Wow & flutter meter (5) Test tapes VT724 : For DOLBY level measurement VT739 : For playback frequency measurement VT712 : For wow flutter & tape speed measurement VT703 : For head azimuth measurement (6) T
45、orque gauge : Cassette type for CTG-N (Mechanism adjustment) ? ? Standard volume position Balance and Bass, Treble volume, Fader : Center (Indication 0) Loudness, Dolby NR, Sound, Cruise : Off Volume position is about 2V at speaker output with following conditions, Playback the test tape VT721. ? ?
46、Measuring conditions (Amplifier section) AM mode999kHz/62dB, INT/400Hz, 30% modulation signal on receiving. FM mono mode97.9MHz/66dB, INT/400Hz, 22.5kHz deviation pilot off mono FM stereo mode1kHz, 67.5kHz dev. pilot 7.5kHz dev. Output level0dB (1V,50/open terminal) Power supply voltage: DC14.4V (11
47、V to 16V) Load impedance: 4 (4 to 8 allowance) Line out: 1.0V/20kload (250 nWb/m) 1-14 (No.MA094B) ? ? Information for using a car audio service jig (1) Were advancing efforts to make our extension cords common for all car audio products. Please use this type of extension cord as follows. (2) As a U
48、-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly after disassembly. (3) Extension cord : EXTKSRT002-6P ( 6 pin extension cord ) For connection between mechanism assembly3. Extension cord : EXTKSRT002-6P ( 6 pin extension cord ) For
49、 connection between mechanism assembly and main board. (4) Check for mechanism driving section such as motor ,etc. ? ? Disassembly method (1) Remove the front panel assembly. (2) Remove the bottom cover. (3) Remove the front chassis assembly. (4) Remove the heat sink. (5) Remove the main board. (6) Reattach the heat sink with the screw B. (Refer to Disassembly method.) (7) Reattach the front panel assembly. (8) Confirm that current is being carried b
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