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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND
DESCRIPTION
The M62498AFP is an optimum digital sound controller IC for home audio. It has a 5ch input selector,input volume,surround(3 variation),tone control(3 band),loudness and 2ch master volume. It can control all of these functions with serial data.
FEATURES PACKAGE
Built-in 5ch input selector. Built-in input volume (2dB step/3bit) IC for Dolby-pro-logic Interface Built-in Surround (ON/OFF,High/Middle/Low(3 variation)) Tone control (Bass/Mid/Treble) Built-in Loudness. Main Volume (36 step (0 to -80dB,- ) Microcomputer Interface
Outline 42P2R-A
0.8mm Pitch 450mil SSOP (8.4mm x 17.5mm x 2.0mm)
RECOMMENDED OPERATING CONDITIONS
Supply voltage range ....Vcc= 4.5~5.5 Rated supply voltage.....Vcc=5V
SYSTEM CONFIGURATION
IC for Dolby-pro-logic
IN A1 IN B1 IN C1 IN D1 IN E1
INPUT VOLUME
MAIN VOLUME
A1 &
LOUDNESS
TONE CONTROL
MAIN VOLUME B1
VOL OUT1
IN A2 IN B2 IN C2 IN D2 IN E2
INPUT VOLUME
MAIN VOLUME
A2 &
LOUDNESS
SURROUND
MAIN VOLUME B2
VOL OUT2
-com INTERFACE
IC for Dolby-pro-logic
CLK
DATA
MITSUBISHI ELECTRIC
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
CLOCK 22 GND 23 VOL OUT2 24 VOL IN2 25 VSELB OUT2 26 TRE2 27 MO2 28 MI2 29 BO2 30 BI2 31 LOUD2 32 VSELA OUT2 33
VSELA IN2 34 /REC-C2 IN VOL 35 OUT2 IN 2E 36
100k TONE SELECT2 TONE SELECT1 VOLUME SELECT B2 VOLUME SELECT B1 MAIN VOLUME 2 -0 to -64dB,-dB
21 DATA 20 VCC 19 VOL OUT1
50k 50k
MAIN VOLUME1 -0 to -64dB,-dB
18 VOL IN1 17 VSELB OUT1
B
A
A
B
16 TRE1 15 MO1 14 MI1 13 BO1 12 BI1
B
A
A
B
11 LOUD1 10 VSELA OUT1
50k
MAIN VOLUME2 0to -16dB VOLUME SELECT A2 VOLUME SELECT A1
50k
MAIN VOLUME1 0 to -16dB
100k
9 8
100k 9.5k
100k
B
REC-C SW
A
A
B
REC-C SW
VSELA IN1 /REC-C1 IN VOL OUT1
9.5k
IN 2D 37 12k IN 2C 38 IN 2B 39 IN 2A 40
REC-B2/SUR1 41 REC-B1/SUR2 42
D,E INPUT ATT SW
REC-A SW
REC-A SW D,E INPUT ATT SW
7 6
IN 1E IN 1D IN 1C IN 1B IN 1A REF OUT REF IN
9.5k
9.5k
50k
100k 100k 100k SW41 200k SW42 200k INPUT VOLUME 2
50k
INPUT VOLUME 1 100k 100k
5 4 3 2 1
A B A B
REC-B SW REC-B SW
100k
25k REF AMP. 25k
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND PIN DESCRIPTION
Pin No. 1 2 3,4,5,6,7, 36,37,38,39,40 8,35 9,34 10,33 11,32 12,31 13,30 14,29 15,28 16,27 17,26 18,25 19,24 20 21 22 23 41 42 Symbol REF IN REF OUT IN 1A,1B,1C,1D,1E 2A,2B,2C,2D,2E INVOL OUT1,2
VSELA IN1,2/REC-C1,2
Function Input pin of the reference Amp. Output pin oh the reference Amp. Input pin of the input selector Ch1 and Ch2 Output pin of the input volume 1 and 2
Input pin of the volume input selector A1 and A2 /Output pin of the REC-C1 and 2 Capacitor connection pin for the volume changing noise reduction Frequency characteristic setting pin in the loudness part Frequency characteristic setting pin in the tone control(Bass).
VSELA OUT1,2 LOUD1,2 BI1,2 BO1,2 MI1,2 MO1,2 TRE1,2 VSELB OUT1,2 VOL IN1,2 VOL OUT1,2 VCC DATA CLOCK GND REC-B2/SUR1 REC-B1/SUR2
Frequency characteristic setting pin in the tone control(Mid). Frequency characteristic setting pin in the tone control(Treble). Output pin of the volume input selector B1 and 2
Input pin of the main volume Output pin of the main volume The power supply Input pin of the serial data
Clock input pin for the serial data forwarding
GND
Output pin of the REC-B2/Device connection pin for the surround external parts Output pin of the REC-B1/Device connection pin for the surround external parts
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Supply voltage Power dissipation Thermal derating Operating temperature Storage temperature Ta25C Ta>25C Conditions Limits 6.0 960 9.6 -20 to +75 -40 to +125
Units V mW mW/C C C
VCC Pd K Topr Tstg
THERMAL DERATING
1000 960
500 480
0 0 25 50 75 80 100 125 150 AMBIENT TEMPERATURE Ta [C]
MITSUBISHI ELECTRIC
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND RECOMMENDED OPERATING CONDITION
(Ta=25C,unless otherwise noted) Parameter Supply voltage Logic"H"level input voltage Logic"L"level input voltage Symbol Conditions MIN TYP MAX Units
VCC GND reference GND reference
4.5
5.0
5.5
V
VIH VIL
2.4
VCC 0.7
V V
GND
RELATIONSHIP BETWEEN DATA AND CLOCK
CLOCK
D0 D1 D2 D3 DD DE DF
DATA
Data signal is read at the rising edge of clock.
Signal is latched at the rising edge of the latch signal.
Latch signal: H
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND DATA CONTROL SPECIFICATION
Four kinds of input format options are availably by changing slot settings of DC,DD.
(When the IC is powered up,the internal setting are not fixed.) (x is optional setting) D04 D14 D24 D34 D44 D54 D64 D74 D84 D94 DA4 DB4 DC DD DE DF X X X 0 X 1 X X X X X X 1100
Chip address
DD DE DF
(1)
D01
D11
D21
D31
D41
D51
D61
D71
D81
D91
DA1 DB1 DC
TONE CONTROL TREBLE
TONE CONTROL MID
TONE CONTROL BASS
0
0
0
0
(2)
DO2 D12 D22 D32 D42 D52 D62 D72 D82 D92
INPUT D ATT SW
DA2 DB2 DC
INPUT E ATT SW
DD
DE
DF
A1 VOLUME CH 1
B1 VOLUME CH 1
0
0
1
0
0
(3)
DO3 D13
D23
D33
D43
D53
D63
D73
D83
D93
LOUD NESS SW
DA3 DB3 DC
TONE INPUT SELE CTOR
DD
DE
DF
A1 VOLUME CH 2
B1 VOLUME CH2
0
1
0
0
0
(4)
Note1)
DO4 D14
SURROUND OF OUTSIDE SETTING
D24
D34
Note) Mute
D44
REC-B ON:1 OFF:0
D54
D64
D74
D84
D94
A INPUT VOLUME
SELECTOR
DA4 DB4 DC
DD
DE
DF
1
INPUT VOLUME
INPUT SELECTOR SURROUND OF INSIDE SETTING
B INPUT VOLUME
SELECTOR
REC-A ON:1 OFF:0
1
1
0
0
SURROUND
0
REC-C ON:1 OFF:0
Note1) Surround of outside setting, It becomes"D54=1"--->SW41 and 42 setting = B fixation.Surround of inside setting (Surround of outside non setting), It becomes "D54=0--->SW41 and 42 setting = A fixation,It becomes volume input selector A setting = A fixation. Note2) In power supply investing to Mute an output pin,it becomes setting like the following.Input selector = ALL OFF,Outside surround mode setting,REC-A~C SW=OFF,B1 main volume=- setting.The similar MUTE setting can be done by setting D34=D54=1 to DC=DD=1,DE=DF=0.
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND SETTING CODE
(1)TONE CONTROL (TREBLE/MID/BASS)
ATT TREBLE D01 MID D41 BASS D81 1 + 8dB + 6dB + 4dB + 2dB 0dB - 2dB - 4dB - 6dB - 8dB 1 1 1 0 0 0 0 0 D11 D51 D91 1 0 0 0 0 0 0 0 1 D21 D61 DA1 0 1 1 0 0 0 1 1 0 D31 D71 DB1 0 1 0 1 0 1 0 1 0
(10)INPUT SELECTOR
INPUT A ch B ch C ch D ch E ch ALL OFF
D04 0 0 0 0 1 1
D14 0 0 1 1 0 1
D24 0 1 0 1 0 1
(11) REC-A SWITCH
REC-A OUTPUT
DB4 0 1
(2)LOUDNESS
LOUDNESS
(3)A VOL SELECTOR
D93 0 1
AVOL SELECTOR BYPASS
OUTSIDE SURROUND INPUT
Note) It is possible to control only at D54="1"setting.
OFF ON
D94 0 1
OFF ON
(12)SURROUND
SURROUND
Note) It is possible to control only at D54="0"setting.
D34 0 1 0 1
D44 0 0 1 1
(4)B VOL SELECTOR
BVOL SELECTOR BYPASS TONE
(5)TONE INPUT SELECTOR
TONE INPUT
BYPASS
INSIDE SURROUND INPUT
OFF L M H
DA4 0 1
DA3 0 1
(13)INPUT VOLUME (6) E INPUT ATT SW
E INPUT ATT SW 0dB -5/-8dB
(7) D INPUT ATT SW
D INPUT ATT SW 0dB -5/-8dB
DA2 0 1
D92 0 1
INPUT VOLUME 0 dB -2 dB -4 dB -6 dB -8 dB -10 dB -12 dB -14 dB
D64 0 0 0 0 1 1 1 1
D74 0 0 1 1 0 0 1 1
D84 0 1 0 1 0 1 0 1
(8) D/E INPUT ATT SW
D/E INPUT ATT SW -8dB -5dB
(9) VOCAL CUT SW
VOCAL CUT SW
OFF ON
DB3 0 1
DB2 0 1
Note:Do not input other data than the above.
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND
(14)A MAIN VOLUME A T T
FRONT STEP VOL. CH 1 FRONT STEP VOL. CH 2
D02 D03 0 0 0 0 0 0 0 0 1
D12 D13 0 0 0 0 1 1 1 1 0
D22 D23 0 0 1 1 0 0 1 1 0
D32 D33 0 1 0 1 0 1 0 1 0
0 dB -2 dB -4 dB -6 dB -8 dB -10 dB -12 dB -14 dB -16 dB
(15)B MAIN VOLUME A T T
BACK STEP VOL. CH 1 BACK STEP VOL. CH 2
D42 D43 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
D52 D53 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1
D62 D63 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1
D72 D73 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
D82 D83 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 ( 8 / 17 )
0 dB -2 dB -4 dB -6 dB -8 dB -10 dB -12 dB -14 dB -16 dB -18 dB -20 dB -22 dB -24 dB -26 dB -28 dB -32 dB -36 dB -40 dB -44 dB -48 dB -52 dB -56 dB -60 dB -61 dB -62 dB -63 dB -64 dB - dB
MITSUBISHI ELECTRIC
MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND ELECTRICAL CHARACTERISTICS
(Ta=25C,VCC=5.0V,f=1kHz,unless otherwise noted. INPUT VOLUME=0dB,SURROUND,LOUDNESS=OFF,VOL.INPUT SELECTOR A,B setting=Bypass,TONE INPUT SELECTOR=Bypass. Refer to the application circuit example.)
(1)Power supply characteristics
Parameter
Circuit current
Symbol AIdd
Test condition
No signal setting
Limits MIN TYP MAX Units 35 60 mA
(2)Input/Output characteristics (Total) Ta=25C
Parameter
Input impedance
Symbol
Rin VIMt
Test condition
3~5pin,38~40pin
(Input pin to3~5,38~40) Output pin to 19,24,A main Vol=-2dB RL=10K,THD=1%
Limits MIN TYP MAX 22 1.2 2.8 1.0 -2.0 33 1.4 3.1 1.25 0 2.0 48
Units
K Vrms
Maximum input Amplitude VIMtDE Maximum output Amplitude Gain VOMt Gvt THDA Total harmonic distortion THDB NoA Output noise level NoB CT
(Input pin to 6,7,36,37)Output pin to 19,24 Note) Rin=12K,RL=10 ,THD=1%
D,Ech ATT SW=-8dB,Input VOL=-2dB
Vrms Vrms dB % % Vrms Vrms Vrms Vrms dB dB
(Input pin~3,40)Output pin to19,24 RL=10,THD=1%
Vi=0.5Vrms,FLAT, Pin(3~6,37~40pin)-19,24gains (Input pin to 3,40) Output pin to19,24 DIN-AUDIO,Vi=0.5Vrms ,RL=30 B Volume input selector THDA:Bypass THDB:Tone
19,24pin,Rg=0,JIS-A, Main volume=- 19,24pin,Rg=0,JIS-A, Main volume=0dB 19,24pin,Rg=0,JIS-A, B Volume input selector:Tone 19,24pin,Rg=0,JIS-A,B Volume input select:Tone,Tone input select:Surround
0.006 0.07 0.009 0.09 2.5 5 7 10 -80 6 10 15 20 -65 -80
Cross talk between channels Volume maximum attenuation quantity
Vo=0.5Vrms , RL=10K,JIS-A Pin19 to 24gains Rg=10K
ATTmax Vi=1Vrms ,JIS-A
Main volume= -
Note) Insert 12K Input Resistance to the pins in series.
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND (3)Tone control characteristics
Vi=0.2Vrms,Input pin to 9 and 34,Output pin to 17 and 26, A VOL input selector:Input to outside surround,Tone input selector:Bypass,B VOL input selector:Tone,unless otherwise noted.
Parameter
Value of Boost(Bass) Value of Cut(Bass) Value of Boost(Mid) Value of Cut(Mid) Value of Boost(Treble) Value of Cut(Treble) Balance between channels
Symbol
G(BASS)B
Test conditions
f=100Hz Tone bass setting +8dB
Limits MIN TYP MAX 6 -10 6 -10 6 -10 -2 8 -8 8 -8 8 -8 0 10 -6 10 -6 10 -6 +2
Units
dB dB dB dB dB dB dB
G(BASS)C f=100Hz Tone bass setting -8dB G(MID)B G(MID)B G(TRE)B G(TRE)B BALT f=1kHz Tone mid setting +8dB f=1kHz Tone mid setting -8dB f=10kHz Tone treble setting +8dB f=10kHz Tone treble setting -8dB boost condition +8,-8dB
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND FUNCTION DESCRIPTION
(1)Main volume This IC has 2 system independence electron volume of low warp percentage and low noise. 0dB~ -dB attenuation quantity can be set with 36 steps(0dB~ -44dB:2dB step,-44dB~ -76dB:4dB step, -77dB ~ -80dB:1dB step). The attenuation quantity to 0~ -16dB can be set in A1 Vol. The attenuation quantity to 0~ -64dB can be set in B1 Vol.They are possible to control.
Equivalent circuit of MAIN VOLUME block
Tone & Surround block
VSELB OUT1,2 VOL IN1,2 17,26pin 18,25pin VOL OUT1,2 19,24pin
A VOL input selector
+ -
0dB~ -16dB: 2dB step
VSELA OUT1,2 17,26pin
B VOL input selector
+ 0dB~ -28dB:2dB step -28dB~ -60dB:4dB step -61dB~ -64dB:1dB step
Condenser for the changing noise reduction
(2)Input selector,Input volume This IC has 5 input selector of 2ch and Input volume of 2ch for Input TRIMMER. The input selector D, E input is either of -8 dB of 0dB/ a choice in the input level with ATT SW at Input Registance 12k. The input volume of 0~-14dB can be set with the 2 dB step. 100k
A
Note1) When inputting a signal above the power supply voltage in D, E input choice, make ATT SW ON. Note2)The setting of ATT SW changes the input resistance of D, E input like the following. ATT -8dB of D,E input setting: 20k(TYP value) 0dB setting : 60k(TYP value) 0dB~ -14dB:2dB step
100k 100k
B
C
12k
D
12k
E
9.5k
50k
+ -
9.5k D Input ATT SW (0dB/-8dB)
To volume input selector A
E Input ATT SW (0dB/-8dB)
Note3) At the time of input selector A~C, E or ALL OFF D input ATT SW becomes -8dB setting. At the time of input selector A~D or ALL OFF D input ATT SW becomes -8dB setting.
Note4)D,E Input ATT is shown at connecting the input resistance Rin=12k to the pins. Note5)When delete the external resistance 12k, D,E Input ATT is as follows ATT SW 0dB setting : 1.87dB -8dB setting : 0dB MITSUBISHI ELECTRIC
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND (3)Equivalent circuit of tone control 3-1Bass,Mid (Boost mode)
IN
OUT
R3
R2
f0 = 2
1 R1(R2+R3)C1C2
(Hz)
Q= C1 R1 C2
1 C1C2R2 C1+C2 R1 R2+R3 +2 R1 R3 +2 R1
Gv = 20log
(dB)
3-2 Bass,Mid (Cut mode)
IN OUT
R2 f0 = 2 1 R1(R2+R3)C1C2 (Hz) R3
Q=
1 C1C2R2 C1+C2 R1 R3 +2 R1 R2+R3 +2 R1
C2 R1 (dB)
C1
Gv = 20log
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND 3-3 Treble (Boost)
IN
OUT
Gv = 20log
R1+R2 (dB) R1 R1
R2
C1
3-4 Treble (Cut) IN
R2 Gv = 20log R1 R1+R2 (dB) R1
OUT
C1

Bass +8dB
Mid
Treble
setting +8dB
0dB
-8dB 100 1k 10k
setting -8dB
Frequency f(Hz)
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND (4) Equivalent circuit of Vocal cut
This IC incorporates the circuit which realizes a vocal cut function simply by lowering gain in the area using the mid circuit of the tone control. But be careful because vocal cut ON setting,the mid of the tone control can not used. VOCAL CUT SW
VOCAL CUT ON setting :SW OFF VOCAL CUT OFF setting:SW ON
IN
OUT
R2 R3
R2+R3=200K
f0 = 1 2 R1(R2+R3)C1C2 2 Gv = 20log R2+R3 +2 R1 (dB) R1 (Hz) C2 C1
At vocal cut ON setting, the frequency characteristic can be set like the following,by the resistance of putting outside:The fixed number of R1 and C1,C2. 1.Vocal cut characteristic f0=550Hz edition R=3K,C1=C2=0.012F Gv=-30dB
8dB setting
Tone mid corrugation at Vocal cut OFF setting +10dB 0dB -10dB -20dB Tone mid corrugation at Vocal cut ON setting -30dB 550 1k Frequency f(Hz)
2.Tone control mid characteristic edition
f0=530Hz R=10K,C1=C2=6800pF Gv=-20dB
8dB setting
Tone mid corrugation at Vocal cut OFF setting
+10dB 0dB -10dB -20dB -30dB 550 1k
Tone mid corrugation at Vocal cut ON setting
100
10k
100
10k
Frequency f(Hz)
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND (5) LOUDNESS
This IC built-in a center tap -type loudness circuit.
A VOL input selector
0dB~ -16dB: 2dB step Tone & Surround block
+ -
VSELB OUT1,2 17,26pin VOL IN1,2 18,25pin VOL OUT1,2 19,24pin
B VOL input selector
+ -
LOUD1,2 11,32pin
LOUDNESS SW LOUDNESS PART
0dB~ -28dB:2dB step -28dB~ -60dB:4dB step -61dB~ -64dB:1dB step
(6)Equivalent circuit of surround block
5k
5k
Ch2
Out2
1k
1
200k 10k 5k
5k
external parts
5k 200k
Out1
5k
Ch1
5k
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND APPLICATION EXAMPLE
(1)Surround of outside setting(for Dolby-Pro-logic) <"D54=1"--->SW41, 42 setting = B fixation.> But, in case of this specification inside surround can not be used. CLOCK 22 23 24
MAIN VOLUME2 -0~ -64dB,-dB MAIN VOLUME1 -0~ -64dB,-dB
Units Resistance: Capacitance:F
21 DATA 20 19
50k 50k
25
2.2 2700p
18 17
VOLUME SELECTOR B2
26 27
B A
VOLUME SELECTOR B1
2.2 2700p
16
A B
8200p 7.5k 8200p 0.1 7.5k 0.1 0.1
28 29 30 31 32 33
INOUT TONE SELECTOR 2
15 14 13 12
B A A B
INPUT TONE SELECTOR 1
8200p 7.5k 8200p 0.1 7.5k 0.1 0.1
11 10
10
10
34
IC for Dolby-Plologic
100k
50k
MAIN VOLUME2 0~-16dB VOLUME SELECTOR A2 VOLUME SELECTOR A1
50k
MAIN VOLUME1 0~-16dB
100k
9
IC for Dolby-Plologic
35
REC-A2
100k 12k
B
REC-C SW
A
A
B
REC-C SW
8
100k
36
9.5k
12k
37
9.5k
REC-A SW D,E INPUT ATT SW
REC-A SW
7
9.5k
12k
REC-A1
D,E INPUT ATT SW
6
9.5k
12k
38 39 40
REC-B2 REC-B1
100k 100k 100k SW41 200k SW42 200k
50k
INPUT VOLUME2
50k
INPUT VOLUME1 100k 100k
5 4 3 2
10
A B A
REC-B SW
100k
41 42
51k
REC-B SW
REF Amp. 51k
B
1
10
MITSUBISHI ELECTRIC
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MITSUBISHI SOUND PROCESSORS
M62498AFP
DIGITAL SOUND CONTROLLER WITH SURROUND
(2)Surround of outside non setting(for Dolby-Pro-logic) <"D54=0"--->SW41, 42 setting = A fixation, Volume input selector A setting=A fixation.>
Units Resistance: Capacitance:F
CLOCK 22 23 24 25
2.2 2700p 8200p 7.5k 8200p 0.1 7.5k 0.1 0.1 10
REC-C2 REC-A2
12k MAIN VOLUME2 -0~ -64dB,-dB
21 DATA 20
50k 50k
MAIN VOLUME1 -0~ -64dB,-dB
19 18 17
2.2 2700p
26 27 28 29 30 31 32 33
100k INPUT TONE SELECTOR2
B
A
VOLUME SELECTOR B2
VOLUME SELECTOR B1
A
B
16 15 14 13 12
8200p 7.5k 8200p 0.1 7.5k 0.1 0.1 10
REC-C1 REC-A1
12k 9.5k
B
A
A
B
INPUT TONE SELECTOR1
11 10
50k
MAIN VOLUME2 0~ -16dB VOLUME SELECTOR A2 VOLUME SELECTOR A1
50k
MAIN VOLUME1 0~ -16dB
100k
34 35 36 37
9.5k 100k
9
100k
B
REC-C SW
A
A
B
REC-C SW
8 7
12k
9.5k
D,E INPUT ATT SW
REC-A SW
REC-A SW D,E INPUT ATT SW
12k
6
9.5k
38 39 40
1k
100k 100k 100k SW41 200k SW42 200k
50k
INPUT VOLUME2
50k
INPUT VOLUME1 100k 100k
5 4 3
A B A
REC-B SW
100k
41
1
51k
REC-B SW
2 1
10 10
42
REF Amp. 51k
B
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