Kenwood KRC-19A, Руководство по обслуживанию

Страница: 3 / 19

3
KRC-19A/G,289
COMPONENT DESCRIPTION
Ref.No. Component Name Application/Function Operation/Condition/Compatibility
IC1 LC75853E LCD driver with key-matrix
Q DTA114EK or UN2111 Key-matrix permission SW Ready on key-matrix
Ref.No. Component Name Application/Function Operation/Condition/Compatibility
IC1 LC72366-9592 System MI-COM. System control
IC2 TDA7461ND E-VOL. & N.C. MPX Controls sound volume. Selects each source.
IC3 HD74HC27FP Mute logic 3-input NOR gate x 3
IC4 TDA7384A Power IC
Amplifies power so that the speaker
can drive audio signal.
IC5 LA3161 Equalizer amplifier Equalizer amplifier for cassette tape sound
Q50 2SC2412K or 2SD601A
BACK-UP detection (Momentary While BACK-UP is added, a base becomes Hi,
power down detection) SW and Q50 is turned on.
Q51 2SB1443
BACK-UP 5V AVR
While BACK-UP is added, AVR o5V.
Q52 2SC2412K or 2SD601A Inverted Darlington connection.
Q53 DTA114YK P.ON 5V SW While a base becomes Lo, Q53 is turned on.
Q54 DTC144EK or UN2213
COM+B SW
Q55 is turned on while Q54's base becomes Hi.
Q55 DTA124EK or UN2112 Works during POWER ON mode.
Q56
2SB1548(P) or 2SB1565(E,F)
Q56 is turned on while Q57's base becomes Hi.
or 2SB1655(E,F) COM+B AVR
Q57 2SC2412K or 2SD601A
Inverted Darlington connection.
Q58 DTC144EK or UN2213 Q59 is turned on while Q58's base becomes Hi.
Q59 DTA124EK or UN2112
ILLUMIB SW Works during POWER ON mode with a panel
attached to the set.
Q60
2SB1548(P) or 2SB1565(E,F)
Q60 is turned on while Q61's base becomes Hi.
or 2SB1655(E,F) ILLUMIB DRIVER
Q61 2SC2412K or 2SD601A
Inverted Darlington connection.
When BACK-UP detection SW or CHANGER
Q150 DTC124EK or UN2212 ELECTRIC VOLUME MUTE SW RESET SW or MI-COM.'s mute works, a base
becomes Hi, and Q150 is turned on.
Q151 DTC114YK or UN2214 SVR DISCHARGE SW
When POWER IC RESET is activated, a base
becomes Hi, Q151 is turned on.
When BACK-UP detection SW or CHANGER
Q153 DTA124EK or UN2112 PRE OUT MUTE DRIVER RESET SW or MI-COM.'s mute works, a base
becomes Lo, and Q153 is turned on.
Q200 DTC124EK or UN2212 FM +B SW Q201 is turned on when Q200's base becomes Hi.
Q201 2SB1277(Q,R) FM +B DRIVER Works during FM reception mode.
Q202 DTC124EK or UN2212 AM +B SW Q203 is turned on when Q202's base becomes Hi.
Q203 2SB1277(Q,R) AM +B DRIVER Works during AM reception mode.
Q260 DTC114YK or UN2214 MOTOR +B SW Q261 is turned on when Q260's base becomes Hi.
Q261 2SB1443 MOTOR +B DRIVER Works during TAPE mode.
Q301 DTA144EK or UN2213 CHANGER RESET SW When a base becomes Lo, Q301 is turned on.
Q320 2SA1037K PANEL 5V SW
While a panel is attached to the set,
a base becomes Lo, and Q320 is turned on.
Q350 2SB1277(Q,R) P-CON. DRIVER Q350 is turned on when Q353's base becomes Hi.
Q351 2SA1037K P-CON. PROTECTION SW
Works when P-CON is being
short-circuited on GND.
Q352 DTA124EK or UN2112
P-CON. PROTECTION Inhibits protection SW function when P-CON
INHIBIT SW works momentary.
Q353 DTC114YK or UN2214 P-CON. SW
Q353 is turned on when a base becomes Hi.
Works during POWER ON mode.
Q370 2SB1277(Q,R) ANT-CON. DRIVER Q370 is turned on when Q371's base becomes Hi.
Q371 DTC114YK or UN2214 ANT-CON. SW Works during TUNER mode.
When BACK-UP detection SW or CHANGER
Q450 DTC143TK or UN2216 PRE OUT MUTE SW(R ch.) RESET SW or MI-COM.'s mute works,
a base becomes Hi, and Q450,451 are turned on.
Q451 DTC143TK or UN2216 PRE OUT MUTE SW(L ch.)
SWITCH UNIT(X13-965X-XX)
SYNTHESIZER UNIT(X14-6570-2X)
www. xiaoyu163. com
QQ 376315150
9 9
2
8 9
4 2
9 8
TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299