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KRC-1054R
CIRCUIT DESCRIPTION
1. Description of Component
1-1. Audio Unit (X09-5042-70)
[RefNo | Semi.name | __Useandfunction | _
Operation
IC1
IC2
ici | TA2025F
Tape EQ amp
Playback equalize, head amplifier.
ies
=| HA12161FP
Dolby B.C
Dolby B/C type decoder, source switching.
NJM4565MD _| CD-CH isolation amp
Input buffer for IC4. Isolation amplifier.
IC11
TC9233FK
E-VOL
Sound volume, loudness, tone control, fader balance, attenuator.
Tone
ifi
:
1-2. Synthesizer Unit (X14-5002-70)
ic
IC
IC.
Buffer between Dolby IC and E. Volume IC.
IC
T.ADV amp
IC
RDS Demodulator IC
IC
IC
IC
IC
|_ Ref
No." |
pici
fics
pica
fos
eee
Code/security data memory
fica
fico | ucaseaam-10_['s-RAM
pici2 |
Licis |
2
3
4.
5
6
7
8
Sub-motor drive IC
ree
ee
Te
|
9
Latch
1
2
5
7
3-terminal-IC
For 8 V AVR.
IC12
Reset IC
Lo when the main unit is detached.
IC15
Inverter
For CD-CH data.
Master p-COM
Mechanism COM
ee ee
iFINCIMPX
IC52
TA75S393F
Comparator
During K2! operation, switches the adjacent interference detection
sensitivity by detecting over-modulation.
for
ascasi2k | BU detect
|03,4 |
Q
a3.4
Wim W
Pas xocrz4ex | toi sw
a
Fore |
Si a i
a i E M
F amp
Q3: IF ampltier for Wide.
Q4: IF amplifier for Narrow.
2SA1428
FM+B SW
2S8A1428
AM+B SW
Q10
2SK536
Vt LPF
For AM.
XDC144EK
IC 2 control
2SA1037K
2SK536
FM Vt LPF
2SC2412K
CRSC SW
Qié
2SC2412K
CRSC drive
2SC2412K
2SA1037K
2SC2412K
XDC144EK
DTA144EK
XDC144EK
XDC144EK
XDC144EK
S-meter buff
S-meter drive
AM SD SW
FM mute SW
Narrow SW
K2I/wide SW
T.ADV circuit gain SW
T.ADV circuit time constant SW
In test mocé.
Switches the gain for playback and fast winding.
Switches is time constant for playback and fast winding.
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