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Service Manual
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ORDER No.MD0004056C2
CD Stereo System
SA-AK48
Colour
(S)........Silver Type
Areas
(E)........Europe and Russia.
(EB)......Great Britain.
(EG)......Germany, France and Italy.
TAPE SECTION : AR2 MECHANISM SERIES
CD SECTION : RAE0152Z-M TRAVERSE DECK SERIES
SYSTEM : SC-AK48
•AMPLIFIER SECTION
RMS power output
/Input sensitivity
Input inpedance
•FM TUNER SECTION
Frequency range
Sensitivity
Antenna terminal (s)
•AM TUNER SECTION
Frequency range
Sensitivity
•CASSETTE DECK SECTION
Track system
Heads
THD 10%, both channels driven
(HIGH) 40W per channel (6Ω)/(MID) 40W per channel (6Ω)/(LOW) 120W per channel (6Ω)/(TOTAL) 200W per channel (6Ω)
AUX
AUX
S/N 26dB
S/N 20dB (at 999kHz)
http://servis-manual.com/
Specifications
87.50 - 108.00MHz/(50kHz steps)
552 - 1629kHz (9kHz steps)
250mV
13.9kΩ
1.8μV (IHF)
1.5μV
75Ω (unbalanced)
560μV/m
4 track, 2 channel
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Summary of Contents for Panasonic MD0004056C2
- Page 1 Service Manual TOP NEXT ORDER No.MD0004056C2 CD Stereo System SA-AK48 Colour (S)..Silver Type Areas (E)..Europe and Russia. (EB)..Great Britain. (EG)..Germany, France and Italy. TAPE SECTION : AR2 MECHANISM SERIES CD SECTION : RAE0152Z-M TRAVERSE DECK SERIES SYSTEM : SC-AK48 Specifications •AMPLIFIER SECTION...
- Page 2 12.1 Error Detection for Cassette Mechanism block TOP PREVIOUS NEXT Error Error Problem Condition Display MODE SW detection error Faulty operation of cassette mechanism./Faulty contact or short-circuit of mechanism mode switch (S951, S971) REC INH SW detection Recording not possible./Faulty contact or short-circuit of REC INH switch (S974, S975) error HALF SW detection error Playback can not perform./Faulty contact or short-circuit of HALF switch (S952, S972)
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Page 3: Error Detection For Cd/Changer Block
12.2 Error Detection for CD/Changer block TOP PREVIOUS NEXT Error Error Problem Condition Display REST SW detection error CD dose not function./This error occurs when the Optical Pick Up REST SW (S701) is not detected within the specified time (about 8 seconds) CD tray opens automatically CLAMP switch (S4) NG (Check&... -
Page 4: Error Detection For Cassette Mechanism Block
12.3 Error Detection for Cassette Mechanism block TOP PREVIOUS NEXT Error Error Problem Condition Display POWER AMP output When POWER is switch on, power become off automatically./During normal operation, if DC DET become L, PCNT abnormal shall become L and the error display on the left shall be displayed (IC500) TOP PREVIOUS NEXT http://servis-manual.com/... -
Page 7: Schematic Diagram
SCHEMATIC DIAGRAM-1 NOTE: The number which noted at the connectors on the schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2" indicates the schematic diagram serial number located on the left corner in the schematic diagram. CD SERVO CIRCUIT :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE 3.3V OPTICAL PICKUP... - Page 8 SCHEMATIC DIAGRAM-2 :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE 3.3V 3.3V TP18 TP20 TP23 R717 C727 50V1 PLAY C731 6.3V220 2.2V 1kHz, 0dB C730 TP21 R718 C728 50V1 3.2V 2.1V 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 F=16.9344MHz 3.2V BCLK...
- Page 9 SCHEMATIC DIAGRAM-3 :TAPE PLAYBACK SIGNAL LINE MECHANISM CONTROL CIRCUIT :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE DECK1 CS1101 L ch PLAYBACK HEAD R ch C1193 1000P DECK2 Q1101 ((0V)) L ch 2SJ498CDTA CS1102 HEAD SELECT 0.1V R/P HEAD (REC:ON) ((0V)) ((4.4V)) R ch C1103 ((0V))
- Page 10 SCHEMATIC DIAGRAM-4 :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE Q1107 DTC144TKA146 P.B EQ/REC EQ (CrO /H.SPEED) ((0V)):CrO ((0V)) ((0V)) C1123 1800P C1129 C1131 C1135 C1146 820P 820P 1000P 16V10 R1146 R1115 390K C1115 R1109 0.033 C1127 R1117 4.3K 0.01 270K...
- Page 11 SCHEMATIC DIAGRAM-5 :TAPE PLAYBACK SIGNAL LINE :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE 14.6V R1151 C1165 16V10 Q1151,1152 ((10.6V)) DTC144TKA146 Q1153 SWITCHING (PLAY:ON) ((1.2V)) Q1115,1116 2SD2114K1V Q1151 ((0.5V)) ((0V)) MUTING R1152 C1166 0.7V ((4.0V)) ((0V)) 16V10 ((0.2V)) 0.2V Q1115 ((4.0V)) Q1154 0.1V ((10.6V)) ((1.2V))
- Page 12 SCHEMATIC DIAGRAM-6 :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE 14.6V H1100 Z1101 M.GND MO.GND +B(5) MAIN D.GND (DSC) +B(3) CIRCUIT R1144 Rch IN (CN304) on R1143 SCHEMATIC Lch IN DIAGRAM-9 A.GND Rch OUT Lch OUT TP10 CN1201 VREF(+) ADIN7 ADIN6...
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Page 13: Main(Tuner) Circuit
SCHEMATIC DIAGRAM-7 :FM SIGNAL LINE :AM SIGNAL LINE MAIN(TUNER) CIRCUIT :POSITIVE VOLTAGE LINE :FM OSC SIGNAL LINE :AM OSC SIGNAL LINE FM FRONT END (ENV17290GIY) 2SC2620 2SK238 FM MIXER RF AMP JK101 FM ANT (75 ) R103 2SK360 FM OSC 2SC2996 BUFFER AMP 2SC2996... - Page 14 SCHEMATIC DIAGRAM-8 :POSITIVE VOLTAGE LINE :FM SIGNAL LINE :AM SIGNAL LINE :AM OSC SIGNAL LINE R104 R109 R106 R108 CF202 470K 470K C105 (0V) 1000P (0V) CF201 C104 (0V) (0V) 1000P 0.7V 0.7V Q106 KRA102MTA Q101 Q102 POWER SUPPLY LINE (FM:ON) 2SC2058SPTA 2SC2058SPTA...
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Page 15: Motor Circuit
SCHEMATIC DIAGRAM - 9 :POSITIVE VOLTAGE LINE :TAPE PLAYBACK SIGNAL LINE :RECORDING SIGNAL LINE :FM SIGNAL LINE MAIN(DSC) CIRCUIT :CD PLAYBACK SIGNAL LINE :AM SIGNAL LINE R401 JK305 FL CIRCUIT (CP605) on SCHEMATIC DIAGURAM-15 L ch R201 18 19 R ch CN303 R411 2.2K... - Page 16 SCHEMATIC DIAGRAM-10 :NEGATIVE VOLTAGE LINE : RECORDING SIGNAL LINE :FM SIGNAL LINE :POSITIVE VOLTAGE LINE :AM SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE :CD SIGNAL LINE FL CIRCUIT(CP604) on SCHEMATIC DIAGRAM-15 C228 R225 R224 R248 R249 IC302 16V10 3.6K M5218AP C229 C230 BUFFER AMP 100P...
- Page 17 SCHEMATIC DIAGRAM-11 :NEGATIVE VOLTAGE LINE :FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :CD SIGNAL LINE :FRONT MID/HIGHT SP DRIVE SIGNAL LINE D401 1SS355TE17 - 7.9V R434 C440 2.2K 50V3.3 C322 R336 R337 0.068 8.2K C435 R431 6800P C321 10V33 R444 C441...
- Page 18 SCHEMATIC DIAGRAM-12 OPERATION (1) CIRCUIT :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE R606 R609 R613 R617 R631 R638 R644 R649 R653 R656 6.8K 4.7K 2.7K 2.2K 1.8K 1.2K H603 R660 D611-615 SLR325MCT31W OPERATION (2) CIRCUIT S600 R605 R608 R611 R616 R624 R633 R640...
- Page 19 SCHEMATIC DIAGRAM-13 :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE Q602 KTA12710YTA POWER SUPPLY 8.5V 8.5V 8.5V 7.8V H602 R693 R663 R682 4.7K R662 (0V) 1.3V 3.6V 0.2V IC601 BU2090AF-E2 LED DRIVE R658 0.2V 4.4V 6.9V 6.9V 6.9V 6.9V 0.6V 5.1V D605 D604 SLI325URCT31...
- Page 20 SCHEMATIC DIAGRAM-14 :NEGATIVE VOLTAGE LINE :POSITIVE VOLTAGE LINE L603 D625 3.3 H D620 D618,620,625 RVD1SS133TA D618 C642 16V10 84 83 82 81 D646 R961 RVD1SS133TA 4.9V -23.5V CRT/SER4 SEG14 5.0V -23.5V SEG15 (3.6V) 3.9V -7.7V DECK1 SEG16 4.6V IC600 -21.2V DECK2 SEG17 R689...
- Page 21 SCHEMATIC DIAGRAM-15 :NEGATIVE VOLTAGE LINE :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE FL600(RSL0295- F) D636 L605 MA4020LTA 100 H FL DISPLAY 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49...
- Page 22 SCHEMATIC DIAGRAM-16 :NEGATIVE VOLTAGE LINE :FRONT LOW SP DRIVE SIGNAL LINE POWER AMP CIRCUIT :POSITIVE VOLTAGE LINE :FRONT MID/HIGHT SP DRIVE SIGNAL LINE IC500 RSN311W64A-P POWER AMP(HIGH,MID,LOW) -28.5V 60.2V -30V 29.5V -0.2V 0.2V -29.7V 29.1V -60.7V R552 R502 R553 4.7K C500 470P R505...
- Page 23 SCHEMATIC DIAGRAM-17 :NEGATIVE VOLTAGE LINE :FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :FRONT HIGHT SP DRIVE SIGNAL LINE IC501 R604A STK470-040 REGULATOR JK501 L505 R602A HIGHT L503 14.5V 9.8V 10.4V 5.1V -27.8V -8.5V -7.9V 7.7V 14.8V 16.0V 28.0V 60V 29.2V 0V -29.7V -60.7V L501...
- Page 24 SCHEMATIC DIAGRAM-18 POWER TORANSFORMER CIRCUIT Q978 KRC102MTA SWITCHING R976 2.8V D979,980 D978 D981 985,986 R980 R981 [E,EG] 1D3E 1D3E 1D3E AC IN CIRCUIT [EB] R985 Q977 2SC3940AQSTA C978 0.01 REGULATOR W500 W500 10.4V 5.8V 6.5V T502 R984A CN502 SYNC CIRCUIT(H601) on SCHEMATIC R978 SYS6V...