Service Manual - Keith
Contents
1. CO1 02 2 001 c02 ca2 c02 802 co2 2 3123 3124 3127 3128 3129 3130 3131 3132 3133 3135 3136 3138 3139 3140 3141 3144 3145 3146 3149 3150 3152 3155 3156 3160 3161 3162 3165 3166 3169 3170 3171 3172 6081 6082 6083 6084 6085 6101 6107 6111 6112 6113 6116 6117 002 002 E03 E03 E03 E03 004 005 04 B05 805 805 DOS cos cos COS COS COS C05 cos cos cos cos BOS D06 006 205 002 C04 CO4 C02 204 006 E02 E03 1101 002 3117 B02 2081 C04 3118 C02 2082 C04 3122 D02 2083 3123 2084 C04 3124 D03 2085 C03 3125 2086 C03 3127 E03 2101 01 3128 E03 2102 3129 E03 2103 C02 3130 D03 2104 BOL 3131 2105 BOS 3132 E03 2109 pos 3133 003 2110 BOS 3135 D04 2111 E03 3138 E04 2112 D04 3139 805 2113 D02 3140 BOS 2120 05 3141 BOS 2121 BOS 3144 COS 2122 05 3145 05 lae 2123 D02 3146 c05 I 2124 D02 3149 C05 mr sd E 3081 C03 3150 COS P 3082 3152 05 i 3083 C04 3155 C05 7 ER a i 3084 C04 3156 COS A 3085 3160 C05 3086 04 3161 05 3087 C04 3162 05 R3133 3088 03 3165 06 3090 3166 B05 3091 04 3169 D05 183135 3092 C04 3170 D06 76 3093 3171 005 at 3094 D03 3172 D02 3095 C03 3173 E04 EN 3096 6081 02. SOLDERING IRON SOLDER WICK 4822 321 40042 SOLDERING SOLDER WICK x NA CLEANING N el OPPER TRACK CHIP COMPONENT DISMOUNTING MOUNTING VACUUM PISTON eg A PAIR OF TW R 14822 395 10082 eg EEZERS SOLDER 205 08 SOLDERING N PRESSURE OR NN IRON wan SOLOER 205 08mm SOLDERING IRON SOLDERING TIME eg A PAIR OF TWEEZERS lt 3 sec side B t PRESSURE HEATING M HEATING EXAMPLES lt Sa PRECAUTIONS 27 012C12 CS 98 647 MECHANICAL MEASUREMENTS AND ADJUSTMENTS Height setting of the turntable For this alignment the unit should be in the position of normal end use The servicing supports 4822 395 30202 can be used here Playback track 1 of disc 4822 397 30096 Disc without defects Connect a D C voltmeter between the negative of the focus motor and earth of the preamplitier print Adjust the height of the turntable with bearing screw 51 in such a way that the voltage is 0 V 100 mV Seal hereafter the screw with sealing paint Checking the angle setting DISC TRANSPARENT 30 707 Place mirror 4822 395 90205 on the objective and glass disc 4822 395 90204 with disc hold down 4822 532 60906 on the turntable Locate the unit under a light source and under this light source a straight line should run e g fluorescent tube with grid Set the arm to mid positio
3. 13 M N a TO DECODER 182 ae AV eT Pri J E as n 1042 Vc HR 080 099 TO SERVO aav 1 081 Te 0082 aes E AU FOC ERROR TO gt SERVO 174 RAO ERROR 1 A173 RAO ERROR 2 FRAME 1 PLATE 12 1 TO SUPPLY 11V 3 12V 1 1 TO SUPPLY 12 1 TO SUPPLY 2A SUPPLY PCB i LASER ON OFF SERVO 0 0 SUPPLY 1 V STOP PLAY M C J 3 CV PLAY ONLY 1021 001 CD STOP ONLY ASSIS ASSY 12V X059 2A 7V 35 184E 21 12 A13 FOCUS RADIAL MOTOR MOTOR C07 8 7 65 43 21 12 A13 FOCUS RADIAL MOTOR MOTOR I C07 87654321 lt SE d 83162 gt 2 ran 4 i 5 N kat TT n sr 31171 191 Z f 3 219 NUNCA So 1S tS r ZS SSS O LOD
4. NE5514N uA714N BZX79 C15 BAW62 15E MR30 56E PR37 7 198 4 10 10 4822 218 10157 4822 209 80818 4822 209 81451 4822 209 80617 4822 130 40941 5322 130 44244 4822 130 34281 4822 130 30613 4822 100 10583 4822 100 20116 4822 100 20115 5322 116 54914 5322 116 54929 4822 111 90163 4822 111 90217 5322 111 90098 4822 111 90154 5322 111 90138 4822 111 90249 4822 111 90157 5322 111 90117 4822 111 90249 5322 111 90097 4822 111 90251 4822 111 90149 4822 111 90488 4822 122 31809 4822 122 31728 5 98 604 8 1984 10 10 C D E 1 2 3 4 38 14 1 ts Fs 11 9 7 2 ibi x foes ks d piu C A 5 A6 wir 4 6 34 987 C7 A B D E 12 Molor Coils A242 A092 2081 241 1 Motor Coils O A08 A142 o A082 CS 98 605 3513982 1101 2081 2082 2083 2084 2085 2086 2101 2102 2103 2104 2105 2109 2110 2111 2112 2113 2120 2121 2123 2124 3081 3082 3083 3084 3085 3086 3087 3088 3090 3091 3092 3093 3095 3096 3097 3098 3099 3101 3102 3103 3104 3105 3106 3114 3115 3116 3117 3118 3122 no2 CO4 C04 C03 C03 cor 502 CO1 801 cos 005 B05 E02 004 cot cos BOS 201 002 CO4 CO4 C03 co C04 cos CO4 C03 B04 604 col
5. laser simulator PCB nr 4 4822 395 30244 should be used here Takethe flex PCB out of socket A11 and connect the switch simulator PCB with the socket Remove plug A13 and insert in the socket on the simulator PCB Connect the plug with 4 wires to socket A13 Take out plug A14 and insert the plug with 1 wire in socket A14 Set the switch on the simulator PCB in the OFF position and the mains switch in the ON position Turn trimming resistor 3140 clockwise max R and mea sure the voltage between points V and V on the simula tor PCB The voltage should be lt 15 mV Check of laser supply control Setthe switch on the simulator PCB in the ON position and measure the voltages between points v and v on the simulator PCB Resistor 3140 clockwise max R U v v 225 mV 45 mV R3140 counterclockwise min R U v 750 mV 150 mV Set resistor 3140 in the mid position This is a preliminary adjustment After the simulator PCB has been removed the laser current must be adjusted See Service Manual CD player Adjusting the focus bandwidth See Service Manual CD player Checking the AGC and offset circuit See Service Manual CD player 3 1984 10 10 Motor control check Hall 1 Desolder the wire from point C152 on the preamplifier printed panel on the C D M 2 Connect channel A of a dual beam oscilloscope to the emitter of transistors 6082 6083 and channel B to the emitter of transistors
6. switch in the ON position Turn trimming resistor 3140 clockwise max R and measure the voltage between points and V on the simulator PCB The voltage should be lt 15 mV Check of laser supply control Set the switch on the simulator PCB in the ON position and measure the voltages between points v and v the simulator PCB Resistor 3140 clockwise max R U v v 225 mV 45 mV Resistor 3140 counterclockwise min R v 750 mV 150 mV Set resistor 3140 in mid position This is a preliminary adjustment After the simulator PCB has been removed the laser current must be adjusted see service manual CD player Adjusting the focus bandwidth see service manual CD player Checking the AGC and offset circuit see service manual CD player Motor control check Hall 1 Remove connector A09 from the motor on the CDM 2 Connect channel A of a dual beam oscilloscope to the emitter of transistors 6082 6083 and channel B to the emitter of transistors 6084 6085 Position of oscilloscope 2 V div 10 ms div 3 Connect pin 1 of connector A09 on the motor PCB to the ground of the set 4 Switch the set on Apply a negative voltage to pin 2 of connector 09 The voltage may not be applied until after the circuit has been connected to power supply voltage Start from and slowly proceed to 5 V Now the motor should run When the motor runs the voltage can be brought
7. to approx 2 5 V The motor should continue to run then 6 Theoscilloscope should display sinus see Fig A After approx 2 s they should lie symmetrically round the 0 and be shifted 90 relative to each other The maximum ratio of the amplitudes of these 2 signals is allowed to be 1 2 signals now 7 The amplitude depends on the applied voltage The V in V out ratio should lie between 1 2 and1 3 8 Determine at which V in the motor runs at 600 rpm At 600 rpm the frequency of V out is 30 Hz Atthis speed V in should liebetween 1 5 Vand 3 7 V Conclusion When all these conditions are present motor and PCB may be considered in order If points 5 6 and 7 are not correct the fault should most probably be found in the electronics If points 5 6 and 7 are correct and the voltage to be applied at point 8 is e g 4 5 V to obtain a motor speed of 600 rpm there will most probably be something wrong mechanically E g the bearing friction is too high 35 181 A 20 Fig A ELECTRICAL MEASUREMENTS AND ADJUSTMENTS Laser power supply Since the light pin is very sensitive to static charges care should be taken that during measurements and adjust ments of the laser power supply the potentials of aids and yourself equal the potential of the CD mechanism 12V TO 142 7 5 0 BAW62 BAW62 m cd DUREE gt P 2 TO A13 po A26 ED E PN cs e 36785 Check The
8. 121 Hg 3101 C3 3105 E4 3116 C3 2105 66 2112 012 2122 Hg 3102 C3 3106 87 3117 D3 2109 14 2113 013 2123 012 3103 03 3114 85 3118 D3 2110 0 2120 7 2124 3104 3115 BE 3122 1 e 3 4 6101 NE5514 0 6 RAFOC UNIT X060 X079 ju momm 5 3123 7 3128 8 3132 08 31 6 3124 7 3129 08 3133 DB 31 6 3125 7 3130 EB 3134 C9 31 6 3127 3131 8 3135 C9 31 5 6 7 3 1101 co74 Jana 47n 270 C072 All 1043 l 1 PRE AMP LASER ASSY i 100 199 3139 C073 jAll3 2105 100E 1k d LASER OUTPUT 1 1 680 1 12 12 12 bo B EPA g q 3152 Goa e C078 3140 680K RAD e MOTOR SD 3155 3156 3 cus LH 6 88 7t 223144 58 3213146 513150 0120 5 on 5 2 VD FOC 532 MOTOR 24 E EEE 7V TO SERVO us FOC MOTOR TO SERVO UE RAD MOTOR E EN RC P LU ALL RES ARE CHIP RES EXCEPT 3165 3166 ALL CAP ARE CHIP EXCEPT EL CAP SUB CF 1 3 4 5 8 7 1 E9 3141 63 3149 65 3156 H7 3165 69 3171 613 6111 69 6114 xI 5 3 ES 314 14 3150 15 3160 67 3166 H9 3172 6112 H9 6116 F13 63 3145 GS 3152 H5 3161 17 3169 610 6101 B4 6113 H10 6117 F13 H3 3146 15 3155 H6 3162 HB 3170 610 6107 C9 114 8 8 9 10 n 12
9. 3 3132 1101 87 2104 2111 2 2121 H9 3101 C3 3105 4 3116 ES 3123 7 3128 C8 08 2101 2105 G6 2112 012 2122 3102 3106 87 3117 E6 3124 7 3129 08 3133 08 313 2102 03 2109 14 2113 013 2123 012 3103 03 3114 BS 3118 06 3125 7 3130 3134 C9 313 2103 03 2110 2120 H7 2124 3104 3115 3122 3127 C8 3131 C8 3135 C9 314 3l 3 3122 MN 3125 680 1041 RAFOC UNIT X060 X079 1043 PRE AMP LASER P B ASSY X100 X199 LASER OUTPUT 3155 3156 TO SERVO PCA FOC MOTOR TO SERVO PUB RAD MOTOR _ E EESE S ee api ree ALL RES ARE CHIP RES EXCEPT 3165 3166 ALL CAP ARE CHIP CAP EXCEPT EL CAP SUB 8 9 0 E9 3141 03 3149 GS 3156 H7 3165 69 3171 613 6111 69 6114 a1 5 E9 3144 14 3150 15 3160 67 3166 3172 H13 6112 H9 6116 F13 63 3145 GS 3152 HS 3161 17 3169 GIO 6101 B4 6113 HIO 6117 H3 3146 15 3155 H6 3162 HB 3170 010 6107 C9 6114 H 8 TO DECODER PCB TO RAD ERROR 1 SERVO RAD ERROR 2 FRAME Mis PLATE 12 1 TO SUPPLY 11V 3 12 1 1 TO SUPPLY i 12 1A TO SUPPLY PCB 2 44 TO SUPPLY VS A142 L 1 0FF SERVO 0 0 prese e EE SUPPLY 1 12V STOP PLAY ILE J L3 PLAY ONLY 12V 1021 CAD
10. 4 SIN 3097 B04 6082 CO4 p 3098 C04 6083 C04 3099 04 6084 C03 3136 J 3101 01 6085 S S 1102 6101 C02 103 6107 D04 c 3104 B02 6111 006 3105 C02 6112 05 3106 001 6114 05 3113 06 6116 E02 3114 C02 6117 E03 3115 C02 3116 C02 36 645 C12 A 1n 36789 B12 SERVICING HINTS In orderto prevent loose metal objects from getting in the CD mechanism it will be necessary to 5 clean repair station The objective can be cleaned with a blow brush The CD mechanism is provided with self lubricating bearings and should thus NOT be lubricated Ensure that the player is not resting on the shaft of the turntable motor during repairs and measurements on the bottom Servicing the RAFOC unit Radial and Focusing unit pos 61 The RAFOC unit supplied by Service is the same one as in 0 the CDM 1 the bottom plate of this RAFOC unit has been replaced by frame item number 503 If the RAFOC unit is replaced carefully an accurately perform the following operations Take the two flex PCBs out of the connectors on the preamplifier PCB Disassemble the defective RAFOC unit by removing the 4 bolts M3x18 mm and shaft item number 504 Remove shaft item number 504 of the new RAFOC unit Pay attention to the 3 intermediate washers item number 502 and spring washer item number 505 they should assume the same positions after assembly Loosen the 4 bolt
11. 6084 6085 Position of oscilloscope 2 V div 10 ms div 3 Switch the set on 4 Apply a negative voltage to the wire desoldered The voltage may not be applied until after the circuit has been connected to power supply voltage Start from 0 V andslowly proceed to 5 V Now the motor should run When the motor runs the voltage can be brought to approx 2 5 V motor should continue to run then 5 The oscilloscope should display sinusoid signals now see Fig A After approx 2 s they should lie symmetrically round the 0 and be shifted 90 relative to each other The maximum ratio of the amplitude of these 2 signals is allowed to be 1 2 6 The amplitude depends on the applied voltage The V in V out pp ratio should lie between 1 2 and 1 3 7 Determine at which V in the motor runs at 600 rpm At 600 rpm the frequency of V out is 30 Hz Atthis speed V in should lie between 1 5 V and 3 7 V Conclusion When all these conditions are present motor and PCB may be considered in order If points 4 5 and 6 are not correct the fault should most probably be found in the electronics If points 4 5 and 6 are correct and the voltage to be applied at point 7 is e g 4 5 V to obtain a motor speed of 60 rpm there will most probably be something wrong mecha nically E g the bearing friction is too high M 35 181 A 20 Fig A CS 98 649 4 1984 10 10 5 98 601 A7 2104 2111 2 2
12. C D M 1 Compact disc player Service MECHANISM Service Service For reasons of production several versions of the C D mechanism have been applied The C D mechanisms are in most cases marked with a round yellow sticker provided with a letter impression The Table below indicates which exploded view and which DIGITAL AUDIO HF pre amplifier laser supply PCB should be consulted Pre amp laser supply circuit diagram Exploded vlew drawing Sticker C D M NEL C OMA I See Service Manual See Service Manual NE pepe coo on eee Service Marval COM See Service Manual 0 See Service Manual 0 See Service Manual 0 See Service Manual 0 bn CLASS 1 LASER PRODUCT 3122 10 03420 Safety regulations require thal the sel be restored to its original condition and thal parts which are identical with those specified be used DocumentationTechnique Service Dokumentation Documentazione di Servizio Huolte Ohje Manual de Servicio Manual de Servicic ject to ification 4822 725 20421 Printed in The Netherlands 532 5514 uAT14N 1 2 Bs aida 1 21 1 za d aad 4 Fogle w zl WY 60129 16 1 5 FOCUS ERROR A17 BZX79 C15 RADIAL ERROR BAW62 15E MR30 HF A18 56E PR37 TO SCREE
13. NING PLATE 34 986 07 5 1984 10 10 4822 209 80818 4822 209 81451 4822 209 80617 4822 130 40941 5322 130 44244 4822 130 34281 4822 130 30613 4822 100 10583 4822 100 20116 4822 100 20115 5322 116 54914 5322 116 54929 4822 111 90163 4822 111 90217 5322 111 90098 4822 111 90154 5322 111 90138 4822 111 90249 4822 111 90157 5322 111 90117 4822 111 90249 5322 111 90097 4822 111 90251 4822 111 90149 4822 111 90488 4822 122 31809 4822 122 31728 1101 Gos 2133 C05 3102 FOS 3133 3169 G01 2082 G03 3081 3103 FOS 3135 3170 CO1 J 2083 3082 3104 FOS 3136 co2 3171 2084 3083 F03 3105 FOS 3138 H03 3172 G05 2085 3084 3106 GOS 3139 F02 6081 C03 2086 C04 3085 FO4 3114 GOS 3140 E02 6083 F03 2101 FOS 3086 F03 3115 605 3141 E02 6084 04 2102 FOS 3087 3116 FOS 3144 C02 6085 004 2103 FOS 3088 G03 3117 FOS 3145 602 6092 F03 2104 05 3089 F03 3118 FOS 3146 G02 6101 605 2105 F02 3090 3122 C05 3149 6107 H03 2109 602 3091 F03 3123 H04 3150 F02 6111 001 2110 E02 3092 3124 3152 C02 6112 FO 2111 3093 3125 H04 3155 F02 6113 601 2112 603 3094 604 3127 04 3156 F02 6116 HOS 2113 GOS 3095 G04 3128 3160 G02 6117 HOS 2120 F02 3096 0 3129 3161 F02 2121 F02 3097 E03 3130 H04 3162 C02 2122 FOL 3099 3131 3165 col 2124 GOS 3101 FOS 3132 3166 F02 CS 98 602 6 1984 10 10 5 98 60
14. STOP ONLY HASSIS ASSY 10 059 22 V 36 623 12 12 TURNTABLE RAD FOCUS MOTOR MOTOR MOTOR 1 Ve jL j C07 gt gt gt 87654321 2 d 3 fei 191 Fx 121 1 30851 1 o 5 5 E 1101 GOS 2086 604 2105 02 2113 HOS 2124 GOS 3085 FO4 3090 04 3095 604 3102 FOS 3114 G05 2082 G03 2101 FOS 2109 602 2120 FO2 3081 F03 3086 F03 3091 3096 604 3103 FOS 3115 605 2083 C04 2102 FOS 2110 E02 2121 FO2 3082 F03 3087 603 3092 603 3097 E03 3104 F05 3116 F05 2084 C03 2103 FOS 2111 HOS 2122 FOl 3083 F03 3088 603 3093 G04 3099 603 3105 GOS 3117 F05 2085 G04 2104 E05 2112 603 2123 GOS 3084 F03 3089 F03 3094 604 3101 605 3106 605 3118 F05 3122 GOS 3128 04 3133 3140 E02 3149 602 3160 602 3169 GOl 6081 603 6106 FOS 6114 F02 3123 HOS 3129 HOS 3135 3141 02 3150 202 3161 FO2 3170 601 6083 6107 03 6116 3124 HOS 3130 04 3136 602 3144 602 3152 602 3162 GOl 3171 02 6084 604 6111 GOl 6117 3125 HOS 3131 3138 3145 602 3155 02 3165 GOl 3172 605 6085 604 6112 FOL 3127 H04 3132 3139 EOL 3146 GOI 3156 FO2 3166 02 3173 6092 6113 601 13 E 14 Qh 111 R3170 om 1 FOCUS ERROR 3165157109 RAO ERROR 1 ag wy 17 TO SCREENING PLATE 36 647 D12 A Thick film unit HF NE532N
15. n Turn the unit until the arm is parallel to the line under the light source see Fig Look in the direction and in the prolongation ofthis line to its reflection on glass disc and mirror These lines should not be more than 4 mm apart Position the set such a way that one line runs across the centre of the mirror When the other line remains inside the mirror s surface the distance is lt 4 mm DISC TRANSPARENT 30708 415 Rotate the CD mechanism through 90 relative to the previous position The arm must be kept in mid position see Fig Repeat the previous measurement Adjusting the angle setting With respect to the adjustment of the angle between disc and light path the factory has looked for a compromise between minimum angle deviation and minimum arm friction if the measurements show that the angle falls outside the tolerance given the angle should NOT be adjusted for minimum deviation but just within tolerance The new setting should lie between the old setting and the optimum setting After adjustment the friction of the arm should be checked This is done by means of a spring pressure gauge which is connected to the counterweight The friction of the arm measured over the total scanning deflection is not allowed to exceed 30 mN When the friction appears to betoo high the angle should be reset to its old value Then replace the arm by a new one and check the angle once more Adjustment of the a
16. ngle is performed as follows Place the set on the servicing supports 4822 395 30202 x 30705 15 Loosen screws C see Fig until bearing plate D can be shifted Correct the angle setting by shifting the bearing plate in the direction indicated on the Figure Tighten screws C ensuring that the setting does not drift Double check the angle setting in two directions Attention After setting the angle the height setting of the turntable should be checked prs d i r 1 pesa fis N 30 710 At5 ELECTRICAL MEASUREMENTS AND ADJUSTMENTS Laser power supply Since the light pin is very sensitive to static charges care should be taken that during measurements and adjust ments of the laser power supply the potentials of aids and yourself equal the potential of the CD mechanism 12 12V TO A172 BAW62 BAW62 hee SEP Beet e TO 16 2 26 34 530 A12 The laser simulator nr 3 4822 395 30229 should be used here Take the flex PCB out of socket A11 and connect the switch simulator PCB with the socket Remove plug A16 and insert it in the socket on the simulator PCB Connect the plug with 4 wires to socket A16 Take out plug A17 and insert the plug with 1 wire in socket A17 Set the switch on the simulator PCB in the OFF position and the mains
17. s M3x18 mm until the bottom plate can be removed Do not remove bolts M3x18 mm they hold the new RAFOC unit together Mount the new RAFOC unit on frame 503 Ensure that the 3 intermediate washers 502 and spring washer 505 are positioned correctly before fixing shaft item number 504 Check that the arm moves freely and the angle setting as well see check and possible adjustment of angle setting For replacing the light pin itis notnecessary to remove the RAFOC unit The light pin can be removed by turning it anti clockwise by means of an open ended spanner of 12 mm and afterwards pulling it out of the arm During mounting the light pin must be pushed into the arm as far as possible and turned clockwise Attention To prevent adjustments from changing NO SCREWS OTHER then those mentioned above should be loosened THE LIGHT PIN IS MUCH MORE SENSITIVE TO STA TIC CHARGE THAN A MOS IC CARELESS TREAT MENT DURING SERVICING MAY REDUCE LIFE EXPECTANCY DRASTICALLY FOR THIS REASON CARE SHOULD BE TAKEN THAT DURING SER VICING THE POTENTIALS OF THE AIDS AND YOUR SELF EQUAL THE POTENTIAL OF THE MECHANISM In the player chip components have been applied For insertion and removal of chip components see Fig SOLOER SOLDER PCB GLUE SOLDERING IRON SOLDERING IRON lt SERVICE PACKAGE SOLDERING IRON Y gt eg WELLER SOLOER TIP
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