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– 4 –

NOTE  ON  BEFORE  STARTING  REPAIR

Charging voltage (V)

Discharging

 Rated power (W)

Parts number

(C101, 102)

resistor (

)

25-48

100

3

87-A00-247-090

49-140

220

5

87-A00-232-090

Note:

The reference numbers (C101, C102) of the electrolytic capacitors can change depending on the models.  Be sure to check the
reference numbers of the charging capacitors on schematic diagram before starting the discharging work.

2. Check items before exchanging the MICROCOMPUTER

Be sure to check the following items before exchanging the MICROCOMPUTER.  Exchange the MICROCOMPUTER after confirming
that the MICROCOMPUTER is surely defective.

2-1. Regarding the HOLD terminal of the MICROCOMPUTER

When the HOLD terminal (INPUT) of the MICROCOMPUTER is “H”, the MICROCOMPUTER is judged to be operating correctly.
When this terminal is “L”, the main power cannot be turned on.  Therefore, be sure to check the terminal voltage of the HOLD
terminal before exchange.
When the MICROCOMPUTER is not defective, the HOLD terminal can also go “L” when the POWER AMPLIFIER has any
abnormalities that triggers the abnormality detection circuit on the MAIN C. B. that sets the HOLD terminal to “L”.

• Good or no good judgement of the MICROCOMPUTER

1

1

1

1

1

Turn on the AC main power.

2

2

2

2

2

Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the “H” level or not.

3

3

3

3

3

When the HOLD terminal is “L” level, the abnormality detection circuit is judged to be working correctly and the
MICROCOMPUTER is judged to be good.

1. Forced discharge of electrolytic capacitor of power supply block

When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across
the electrolytic capacitors (C101, 102) even though AC power cord is removed.  If repair is attempted in this condition, secondary defect
can occur.
In order to prevent the secondary trouble, perform the following measures before starting repair work.

Discharge procedure

1

1

1

1

1

Remove the AC power cord.

2

2

2

2

2

Connect a discharging resistor at an end of lead wire that
has clips at both ends.  Connect the other end of the lead
wire to metal chassis.

3

3

3

3

3

Contact the other end of the discharging resistor to the
positive (+) side (+VH) of C101. (For two seconds)

4

4

4

4

4

Contact the same end of the discharging resistor as step

3

3

3

3

3

 to the negative (-) side (-VH) of C102 in the same way.

(For two seconds)

5

5

5

5

5

Check that voltage across C101 and C102 has decreased
to 1 V or less using a multimeter or an oscilloscope.

Select a discharging resistor referring to the following table.

Fig-1

MAIN C.B

D101

C101

C102

2

2

3

4

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Содержание Z-L220

Страница 1: ...5 ZD3N1M Z L220 LH S M Code No 09 011 439 5R1 This Service Manual is the Revision Publishing and replaces Simple Manual of CX ZL220 LH S M Code No 09 00B 439 5T1 If requiring information about the CD...

Страница 2: ...ohms unbalanced AM tuner section Tuning range 531 kHz to 1602 kHz 9 kHz step 530 kHz to 1710 kHz 10 kHz step Usable sensitivity 350 V m Antenna Loop antenna Amplifier section Power output Rated 40 W...

Страница 3: ...s tt n vad som specificeras i denna bruksanvising kan anv ndaren uts ttas f r osynling laserstr lning som verskrider gr nsen f r laserklass 1 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING CAUTI...

Страница 4: ...m that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the H level or not 3 3 3 3 3 When the HOLD terminal is L level the abnormality detection circuit is judged to be wor...

Страница 5: ...c capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers 3 3 3 3 3 Connect the AC power cord again If the MICROCOMPUTER returns to the normal operation the MICROCOMPUTER is good No...

Страница 6: ...0 CAP E 47 16 SMG C36 87 010 381 080 CAP ELECT 330 16V C38 87 012 286 080 C CAP U 0 01 25 C60 87 A12 089 080 CAP E 3 3 50 SMG C61 87 A12 071 080 CAP E 47 25 SMG C83 87 A12 074 080 CAP ELECT 470 25V SM...

Страница 7: ...1 16F C814 87 012 286 080 CAP U 0 01 25 C815 87 A12 086 080 CAP E 0 47 50 SMG C816 87 A12 086 080 CAP E 0 47 50 SMG C821 87 A12 091 080 CAP E 10 50 SMG C823 87 010 986 080 C CAP S 820P 50 J CH C824 8...

Страница 8: ...R 220P 50V C130 87 010 405 040 CAP E 10 50 C135 87 A11 148 080 CAP TC U 0 1 50 Z F C201 87 018 118 080 CAP TC U 82P 50 B C202 87 018 117 080 CAP TC U 68P 50 SL C205 87 018 117 080 CAP TC U 68P 50 SL C...

Страница 9: ...8 A A CHIP RESISTOR PART CODE 0 55 Resistor Code Dimensions mm Symbol 1 16W 1005 5 CJ 1 0 0 5 0 35 104 L t W E C B DTA114ES 2SK360E DTC114ES E C B S D G 2SJ460 2SK2541 E C B CSC4115BC KTA1266GR KTC319...

Страница 10: ...10 FL 10 BT 224GNK GRID ASSIGNMENT ANODE CONNECTION PIN CONNECTION GRID ASSIGNMENT ANODE CONNECTION PIN CONNECTION All manuals and user guides at all guides com...

Страница 11: ...MAIN 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 11 A B C D E F G H I J K L M N O P Q R S T U All manuals and user guides at all guides com a l l g u i d e...

Страница 12: ...12 SCHEMATIC DIAGRAM 1 MAIN 1 2 All manuals and user guides at all guides com...

Страница 13: ...13 SCHEMATIC DIAGRAM 2 MAIN 2 2 TUNER All manuals and user guides at all guides com...

Страница 14: ...OTE SENSOR WIRING 2 FRONT 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 14 A B C D E F G H I J K L M N O P Q R S T U All manuals and user guides at all guides...

Страница 15: ...15 SCHEMATIC DIAGRAM 3 FRONT All manuals and user guides at all guides com...

Страница 16: ...3 PT 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 16 A B C D E F G H I J K L M N O P Q R S T U All manuals and user guides at all guides com a l l g u i d e s...

Страница 17: ...17 SCHEMATIC DIAGRAM 4 PT All manuals and user guides at all guides com...

Страница 18: ...WIRING 4 DECK 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H I J K L M N O P Q R S T U 18 All manuals and user guides at all guides com...

Страница 19: ...19 IC BLOCK DIAGRAM All manuals and user guides at all guides com...

Страница 20: ...SW I Deck mecha SW A D input 22 I CDSW I CD mecha SW matrix input 23 I DISH I CD turnable photo sensor 24 HOLD I Hold voltage level A D input 25 I RE_VOL I Rotary encorder A D input 26 I RDS SG I RDS...

Страница 21: ...90 VDD2 Connected to power supply 91 DISH RVS O CD dish reverse output Reserved for VCD Not used H REV 92 DISH FWD O CD dish forward output Reserved for VCD Not used H FWD 93 OPEN O CD tray open outp...

Страница 22: ...nt becomes maximum 6 AM IF Adjustment Settings Test point TP8 Lch TP9 Rch Adjustment location L802 450kHz 7 DC Balance Mono Distortion Adjustment Settings Test point TP3 TP4 DC TP8 Lch TP9 Rch Distort...

Страница 23: ...signal is 0dB 5dB 4 PB Sensitivity Check DECK 1 DECK 2 Settings Test tape TTA 200 Test point TP8 Lch TP9 Rch Method Play back the test tape and check that the output level of the test point is 140mV...

Страница 24: ...g Servo OFF ON Tracking balance check Mode button The OFF ON operation repeats each time the PAUSE button is pressed 5 Sled Mode FF button CD TEST PU moves to inner track 2 At the same time the lens i...

Страница 25: ...25 MECHANICAL EXPLODED VIEW 1 1 All manuals and user guides at all guides com...

Страница 26: ...7 NF4 221 010 HLDR CABLE 27 8B MA6 011 010 CABI REAR LH A6 28 87 A80 148 010 AC CORD ASSY E BLK 29 87 085 185 010 BUSHING AC CORD E 30 87 MA3 062 010 FOOT H17 31 8B MA3 047 010 PANEL SIDE L U 32 8B MA...

Страница 27: ...22 24 23 26 27 18 28 25 29 55 54 30 31 32 1 34 35 36 38 39 40 41 43 44 45 46 49 48 42 50 53 53 1 2 3 4 5 6 15 14 24 26 27 28 25 29 55 54 37 37 33 33 1 a b a b 34 61 38 39 60 40 10 7 8 9 11 12 10 43 4...

Страница 28: ...FF 29 8Z ZM1 206 010 LEVER REW 30 8Z ZM1 210 010 LEVER REC 31 87 A90 404 010 HEAD EH LE15B 32 8Z ZM2 218 010 LEVER REC LOCK ZZM 2 33 87 A91 492 010 SW LEAF MSW18560 34 8Z ZM1 226 010 GEAR REEL L 35 8Z...

Страница 29: ...kwise direction until click sound comes out Remove the grill frame and four pieces of rubber caps by pulling out with a flat bladed screwdriver Remove the screws from hole where installed rubber caps...

Страница 30: ...605 010 SPKR T 60 5 83 MSE 605 010 SPKR CERAMIC 6 8B MSG 612 010 CORD SPKR 7 8A NSJ 006 010 BADGE AIWA S35 ACCESSORIES PACKAGE LIST DESCRIPTION REF NO KANRI NO PART NO 1 8B MA6 902 010 IB LH ESP M 2...

Страница 31: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 2000068 9630472 0251431 All manuals and user guides at all guides com a l l g u i d e s c o m...

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