Sony MHC-RG550 Service Manual ▷ View online
21
MHC-RG550
SEÇÃO 4
AJUSTES ELÉTRICOS
SEÇÃO CD
Note:
1. O bloco do CD é desenvolvido para operar sem ajustes. Apesar disso, ve.
rifique os itens na ordem dada.
2. Use YEDS-18 (3-702-101-01) a menos que outro seja indicado.
3. Use um osciloscopio com impedancia maior que 10M ohms .
4. Limpe as lentes objetivas com detergente neutro quando o nÌvel de
3. Use um osciloscopio com impedancia maior que 10M ohms .
4. Limpe as lentes objetivas com detergente neutro quando o nÌvel de
sinal estiver mais baixo que o especificado no teste a seguir.
VERIFICAÇÃO DA CURVA S
Procedure :
1. Conecte o osciloscopio ao TP (FE) e TP (VC).
2. Ligue o aparelho.
3. Insira o disco (YEDS-18) e deixe procura de foco atuar·.
1. Conecte o osciloscopio ao TP (FE) e TP (VC).
2. Ligue o aparelho.
3. Insira o disco (YEDS-18) e deixe procura de foco atuar·.
(Em consequencia do abre e fecha da bandeja de discos).
4. Confirme se a forma de onda no osciloscopio (S-curve) é
simetrica entre A e B. E confirme o nivel pico-a-pico de até
3 ± 0.5 Vp-p.
3 ± 0.5 Vp-p.
Note:
• Tente medir varias vezes para ter certeza que a razao entre
A : B ou B : A é maior que a razao de 10 : 7.
• Aumente a varredura e a iluminacao da tela do osciloscopio
para obter a melhor forma de onda.
VERIFICAÇÃO DO NÍVEL DE RF
Procedimento:
1. Conecte o osciloscopio ao TP (RF) e ao TP(VC).
2. Ligue o aparelho.
3. Insira o disco (YEDS-18)) e reproduza.
4. Confirme se a forma de onda no osciloscopio é clara e se o
1. Conecte o osciloscopio ao TP (RF) e ao TP(VC).
2. Ligue o aparelho.
3. Insira o disco (YEDS-18)) e reproduza.
4. Confirme se a forma de onda no osciloscopio é clara e se o
nivel de RF esta correto ou nao.
Note:
Uma forma de onda clara de RF é aquela onde a forma “
◊ ” pode
ser claramente identificada no centro da forma de onda.
Localização do Ajuste: Placa BD
Placa BD
Osciloscópio
TP(FE)
TP(VC)
TP(VC)
simetria
forma de onda (curva-S)
até 3
±
0.5Vp-p
A
B
TP(RF)
Placa BD
osciloscópio
TP(VC)
Forma de onda do sinal RF
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
nível: 1.3
±
0.3Vp-p
TP (VC)
TP (RF)
TP (FE)
IC721
– Placa BD (lado condutor) –
TP (TE)
22
MHC-RG550
SEÇÃO 5
DIAGRAMAS
5-1. DESCRIÇÕES DOS PINOS DE IC
• IC309 BU2099FV (MULTI CONTROLLER) (PLACA PRINCIPAL)
Pin No.
Pin Name
I/O
Pin Description
1
VSS
—
Ground pin
2
NC
—
Not used. (Open)
3
DATA
I
Serial data input from the tape mechanism controller
4
CLOCK
I
Serial data transfer clock signal input from the system controller
5
LCK
I
Serial data latch pulse clock signal input from the system controller
6
REC
O
Recording on/off control signal output “L”: recording
7
BIAS
O
Recording bias on/off control signal output “L”: bias on
8
A/B
O
Deck-A/B selection signal output to the deck-A/B select switch
“L”: deck-B, “H”: deck-A
9
PB MUTE
O
Playback muting on/off control signal output to the recording/playback equalizer
amplifier “H”: muting on
10
REC MUTE
O
Recording muting on/off control signal output to the recording/playback equalizer
amplifier “L”: muting on
11
TUNER MUTE
O
Tuner muting on/off control signal output to the tuner unit “H”: muting on
12
LM-R (CD)
O
Loading motor drive signal output
13
LM-L (CD)
O
Loading motor drive signal output
14
TM-R (CD)
O
Table motor drive signal output
15
TM-L (CD)
O
Table motor drive signal output
16
SP RERAY
O
Front speaker on/off relay drive control signal output “L”: front speaker on
17
LINK/MATRIX
O
Surround speaker on/off relay drive control signal output “H”: surround speaker on
18
SO
O
Serial data output to the bass boost controller
19
OE
—
Not used. (Connect to ground.)
20
VDD
—
Power supply pin (+3.3 V)
23
MHC-RG550
• IC310 BU2099FV (BASS BOOST CONTROLLER) (PLACA PRINCIPAL)
Pin No.
Pin Name
I/O
Pin Description
1
VSS
—
Ground pin
2
NC
—
Not used. (Open)
3
DATA
I
Serial data input from the multi controller
4
CLOCK
I
Serial data transfer clock signal input from the system controller
5
LCK
I
Serial data latch pulse clock signal input from the system controller
6 to 8
NC
—
Not used. (Open)
9
MOTOR VCC
O
Motor power control signal output “L”: motor power on
10
SOL A
O
SOL-A control signal output
11
SOL B
O
SOL-B control signal output
12
LINE OUT MUTE
O
Line out mute signal output terminal “H”: mute on
13
CD MUTE
O
CD mute signal output terminal “H”: mute on
14 to 16
CONT 1 to 3
O
Bass boost control signal output “H”: bass boost
17
NC
—
Not used. (Open)
18
SO
O
Serial data output Not used. (Open)
19
OE
—
Not used. (Connect to ground.)
20
VDD
—
Power supply pin (+3.3 V)
24
MHC-RG550
• IC601 LC876696B-51Y1-E (SYSTEM CONTROL, FLD CONTROL) (PLACA PAINEL)
Pin No.
Pin Name
I/O
Pin Description
1
SYS MUTE
O
System mute signal output
2
BU1924 DATA
I
Not used in this set. (Connected to ground.)
3
PWR DOWN
I
Power down signal input
4
LC78646 RESET
O
CD reset signal output
5
LC78646 CE
O
CD CE signal output
6
LC78684 CE (MP3)
O
CD CE (MP3) signal output
7
M61519 CLK
O
Clock signal output
8
BU2099FV LCK
O
LCK signal output
9
LC72121 CE
O
CE signal output
10
LC78684 SYNC
I
SYNC signal input
11
RESET
I
Reset signal input from the IC603
12
XT1
I
Oscillater connect pin (32.768 kHz)
13
XT2
O
Oscillater connect pin (32.768 kHz)
14
VSS1
—
Ground pin
15
CF1
I
Ceramic vibrator connect pin (8.64 MHz)
16
CF2
O
Ceramic vibrator connect pin (8.64 MHz)
17
VDD1
—
Power supply pin (+3.3 V)
18
TAPE A STAT
I
Tape A start signal input
19
TAPE B STAT
I
Tape B start signal input
20
CD ENCODER
I
CD encoder switch signal input
21
SW ON/OFF SENSOR
I
Switch control on/off signal input
22
STREAM IN
I
Stream in signal input
23
VACS
I
VACS signal input
24
KEY2
I
Key signal input 2
25
KEY1
I
Key signal input 1
26
KEY0
I
Key signal input 0
27
PROTECTOR (HOLD)
I
Protector (Hold) signal input
28
REMOCON IN
I
Remote control signal input from the RM601
29
BU1924 CLK
I
Not used in this set. (Connected to ground.)
30 – 41
G12 – G1
O
FLD control signal output
42 – 45
P1 – P4
O
FLD control signal output
46
VDD3
—
Power supply pin (+3.3 V)
47 – 50
P5 – P8
O
FLD control signal output
51
VPP
—
Ground pin
52 – 55
P9 – P12
O
FLD control signal output
56
SW1 (a) P13
O
FLD control signal output
57
SW2 (b) P14
O
FLD control signal output
58
SW3 (c) P15
O
FLD control signal output
59
SW4 (d) P16
O
FLD control signal output
60
SW5 P17
O
FLD control signal output
61
SW6 P18
O
FLD control signal output
62
SW7 P19
O
FLD control signal output
63
SW8 P20
O
FLD control signal output
64, 65
P21, P22
O
FLD control signal output
66
ENTER LED
O
Not used in this set. (Open)
67
MD/VIDEO LED
O
GAME LED (LED610) drive signal output
68
GAME LED
O
MD/VIDEO LED (LED612) drive signal output
69
TAPE LED
O
TAPE A/B LED (LED609) drive signal output
70
TUNER LED
O
TUNER/BAND LED (LED608) drive signal output
71
CD LED
O
CD LED (LED607) drive signal output
72
VDD4
—
Power supply pin (+3.3 V)
73
CD VDD
O
CD power control signal output
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