1. Remove the six screws A attaching the side grille on the left side of the body and pull out the side grille from the body. 2. Similarly, remove the side grille on the right side.
Side grille (left)
A
A
Fig.1
Side grille (right)
A
Removing the front cabinet assembly and the rear cabinet assembly (See Fig.3 and 3a)
Prior to performing the following procedure, remove the right and left side grilles. 1. Remove the battery cover on the back of the body. 2. Remove the eight screws B on the back of the body and detach the front cabinet assembly and the rear cabinet assembly. Disconnect the connector CN904 on the LED (Illumination) board. Attention: When reassembling, make sure that connector CN633 on the rear cabinet is connected to the speaker terminal on the front cabinet. Fig.2
A
B
B
CN904
Push
Push
LED (Illumination) board
Fig.3a
B
Battery cover
B
Fig.3
1-6
RV-B550BU Removing the cassette mechanism assembly (See Fig.4 and 5)
Prior to performing the following procedure, remove the right and left side grilles and the front cabinet assembly. 1. Disconnect the card wires from connector CN405 and CN406 on the microcomputer board located on the underside of the CD unit of the rear cabinet assembly. 2. Remove the four screws C attaching head shield and the cassette mechanism assembly.
CN406 CN405
Cassette mechanism assembly Microcomputer board
Removing the CD unit assembly (See Fig.6 to 8)
The CD unit assembly cannot be removed if the cassette mechanism assembly has not been removed. Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly and the cassette mechanism assembly. 1. Remove the cassette chassis (See Fig.6). 2. Disconnect the card wires from connector CN631 and CN632 on the amplifier board. 3. Disconnect the card wires from connector CN403 on the microcomputer board. 4. Remove the two screws D attaching the CD mechanism assembly on the back of the rear cabinet (See Fig.8). 5. Pull out the CD unit assembly toward the front.
Head shield
Fig.4
C
C
Cassette chassis Cassette mechanism assembly
Fig.5
CD unit assembly Microcomputer board CN403
Cassette chassis
Fig.6
CD unit assembly
D
amplifier board CN632 CN631 Rear cabinet
Fig.7
Fig.8 1-7
RV-B550BU Removing the tuner board (See Fig.9)
Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly. 1. Disconnect the card wire from connector CN403 on the microcomputer board. 2. Remove the screw E attaching the tuner board holder and pull out the tuner board holder together with the tuner board. Disconnect the antenna wire from TP1.
Microcomputer board CN403 Antenna wire
TP1
Tuner board holder
E
Fig.9
Tuner board
Remove the power transformer assembly (See Fig.10)
Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly, the cassette mechanism assembly and the cassette chassis. 1. Disconnect the harness from connector CN192 and CN193 on the power supply board respectively. 2. Remove the four screws F attaching the power transformer assembly.
Power supply board
F
CN193
Remove the amplifier board, the power supply board and the battery board (See Fig.11)
Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly, the cassette mechanism assembly, the cassette chassis and the CD unit assembly. 1. Disconnect the 5pin harness from connector CN191 on the power supply board. 2. Remove the two screws G and the one screw H attaching the amplifier board. 3. Disconnect the harness from connector CN192 and CN193 on the power supply board respectively. 4. Remove the two screws I attaching the power supply board. 5. Pull out the battery board.
CN191
CN191
F
CN192 Power transformer assembly
Fig.10
Power supply board CN192 CN193
I
H
G
CN631
Amplifier board CN631
Fig.11 1-8
Battery board
RV-B550BU
1. Disconnect the card wire from connector CN251 and CN252 on the key switch board on the front side of the CD unit assembly. 2. Remove the four screws J attaching the microcomputer board on the underside of the CD unit assembly. 3. Disconnect the card wire or the harness from connector CN601, CN602 and CN907 on the microcomputer board respectively.
CN252 Microcomputer board CN251 Key switch board
Fig.12
J
J
Microcomputer board CN601 CN907
J
CN602
J
Fig.13
Removing the key switch board (See Fig.14 and 15)
Prior to performing the following procedure, remove the microcomputer board. 1. Release the four tabs a fixing the right and left function buttons and the three tabs b by the key switch board.
a Push b Push
a
Push a
Push
Push
b Push tabs a and b in the directions of the arrows Key switch board carefully not to damage the function buttons Function switch buttons Function switch buttons (power)
2. Remove the six screws K attaching the key switch board. 3. Pull out the key switch board from two tabs c.
Fig.14
(volume)
K
K
c
Key switch board
c
Fig.15 1-9
RV-B550BU
Removing the CD door switch board (See Fig.16)
Prior to performing the following procedure, remove the microcomputer board. 1. Release the two tabs d fixing the CD door switch board on the back of the CD unit assembly.
L
CD door switch board
CD mechanism Assembly
d
Removing the CD mechanism assembly (See Fig.16)
Prior to performing the following procedure, remove the microcomputer board. 1. Remove the four screws L attaching the CD mechanism holder on the back of the CD unit assembly. 2. Remove the CD mechanism holder, the CD cushion and the CD mechanism assembly respectively. Fig.16
CD cushion
L
CD mechanism holder
M
Removing the pickup assembly (See Fig.17 to 19)
Prior to performing the following procedure, remove the CD mechanism assembly. 1. Remove the four screws M attaching the pickup cover. 2. Push the shaft stopper by the turn table in the direction of the arrow and pull out the shaft. The pickup assembly comes off.
M
M
Pickup cover
Fig.17
Shaft Turn table
Pickup assembly
Turn table
Pickup assembly
Shaft stopper
Shaft
Shaft stopper
Fig.18
Fig.19
1-10
RV-B550BU
Prior to performing the following procedure, remove the front cabinet assembly and the rear cabinet assembly. 1. Remove the two screws N and two screws O attaching the LED boards on the speaker. 2. Disconnect the harness from connector FW251 and N FW261.
FW261 FW251 Speaker Speaker
P
Q
P
O
Removing the speakers (See Fig.20)
Prior to performing the following procedure, remove the front cabinet assembly and the rear cabinet assembly. 1. Remove the eight screws P attaching the right and left speakers on the inside of the front cabinet assembly. 2. Remove the screw Q attaching the speaker terminal.
P
LED board LED board Speaker terminal
P
Fig.20
1-11
RV-B550BU <
1. While shifting the trigger arms seen on the right side of the head mount in the arrow direction, Flywheel R turn the flywheel R in counterclockwise direction until the head mount has gone out with a click (See Fig. 1). 2. When the flywheel R is rotated in counterclockwise direction, the playback/recording & eraser head will be turned in counterclockwise direction from the position in Fig. 2 to that in Fig. 3. 3. At this position, disconnect the flexible P.C. board Head mount Trigger arm (outgoing from the playback/recording & eraser head) Fig. 1 from the connector CN31 on the head amplifier & mechanism control P.C. board. Playback/recording & 4. After dismounting the FPC holder, remove the flexible eraser head Spring a P.C. board. Frexible 5. Remove the flexible P.C. board from the chassis base. Trigger arm 6. Remove the spring a from behind the playback/recording board & eraser head. 7. Loosen the reversing azimuth screw retaining the playback /recording & eraser head. 8. Take out the playback/recording & eraser head from the front of the head mount. 9. The playback/recoring & eraser head should also be removed similarly according to Steps 1 ~ 8 above. Head amplifier & mechanism control P.C. board Fig. 2 Flywheel R
Cassette mechanism
Reassembling the playback/recording & eraser head
1. Reassemble the playback head from the front of the head mount to the position as shown in Fig. 3. 2. Fix the reversing azimuth screw. 3. Set the spring a from behind the Playback/Recording & Eraser head. 4. Attach the flexible P.C. board to the chassis base, and fix it with the FPC holder as shown in Fig. 3. 5. The playback/recording & eraser head should also be reassembled similarly to Step 1 ~ 4 above.
Playback/recording & eraser head
Reversing azimuth screw Head mount Frexible board
Spring "a"
FPC holder Fig. 3
Head amplifier & mechanis control P.C. board
1-12
RV-B550BU Removing the head amplifier & mechanism control P.C. board (See Fig. 4)
1. Remove the cassette mechanism assembly. 2. After turning over th cassette mechanism assembly, remove the three screws A retaining the head amplifier & mechanism control P.C. board. 3. Disconnect the connector CN32 on the P.C. board including the connector CN 1 on the reel pulse P.C. board. 4. When necessary, remove the 4 pin parallel wire soldered to the main motor. Head amplifier & mechanism control P.C. board
A
A
Belt Main motor assembly
B
B A
4pin parallel wire Main moteor assembly
Flexible P.C. board
Removing the main motor assembly (See Fig. 4~6)
1. Remove the two screws B retaining the main motor assembly (See Fig. 4, 4a). 2. While raising the main motor, remove the capstan belt from the motor pulley (See Fig. 4a). Caution 1: Be sure to handle the capstan belt so carefully that this belt will not be stained by grease and other foreign matter. Moreover, this belt should be hanged while referring to the capstan belt hanging method in Fig. 5, 6.
Fig. 4
Main motor assembly Capstan belt
Motor pulley
Fig. 4a Mechanism motor assembly Main motor assembly Capstan belt Motor pulley Flywheel
Capstan belt Fig. 5 Fig. 6
Motor pulley
1-13
RV-B550BU Removing the flywheel (See Figs. 7 and 8)
Flywheel R
Flywheel L
1. Remove the head amplifier & mechanism control P.C. board. 2. Remove the main motor assembly. 3. After turning over the cassette mechanism, remove the slit washers b and c fixing the capstan shafts R and L, and pull out the flywheel R and L respectively from behind the cassette mechanism. Capstan shaft R C
Capstan shaft L b
Slit washer Fig.7
Slit washer
Flywheel R Fig. 8
Flywheel L
Removing the reel pulse P.C. board and solenoid (See Fig. 9)
1. Remove the five pawls d~h and screw C reataining the reel pulse P.C. board. 2. From the surface of the reel pulse P.C. board parts, remove the two pawls i and j retaining the solenoid. C h d e f g Reel pulse P.C. board
j Solenoid
i
Fig. 9
1-14
RV-B550BU
Adjustment method
Measuring devices necessary for adjustment
1. Low-frequency oscillator It must have the ability to output 600ohm from 0 dBs at an oscillation frequency of 20 Hz 50 Hz. 2.Attenuator impedance: 600ohm 3.Electronic voltmeter
Tuner section
Voltage input to the tuner .......................... +B: DC 5.7 V VT: DC 12 V Standard measuring output ...... 26.1 mV (0.28 V) /3ohm Input locations ..................... AM: standard loop antenna FM: TP1 (hot) and TP2 (GND)
Standard settings for measuring volume
4.Distortion meter 5.Frequency counter 6.Wow and flutter meter 7.Test tapes VT-712: tape speed and rotational distortion (3 kHz) VT-724: standard level (1 kHz) VT-703: head angle adjustment (10 kHz), or use VT-73 VT-739: reproduction of frequency characteristics (1 kHz, 63 Hz, 10 kHz) 8.Blank tape Type I : AC-225 (TDK-AD) Type II : AC-514 (TDK-SA) 9.Torque gauge: Tension gauge for playback, fast-forward and rewind. FWD (TW211A), REW (TW212A) and FF/REW (TW2231A) Sound ..................................................................... OFF Effective hyper bass ............................................... OFF Volume adjustment ........................................... VOL. 23
Precautions for measuring
1.Input 30 pF and 33 kohm to the IF sweeper output and 0.082 F and 100 kohm to the sweeper input, respectively. 2.Lower the output level of the IF sweeper as much as possible in the adjustable range. 3.The IF sweeper needs no adjustment as it is a fixed component. 4.It is not necessary to perform any kind of adjustment on the MPX, as a ceramic oscillator is used for measuring. 5.FM tracking adjustment is not necessary as a fixed coil is used. 6.The grounding circuit is separate from the input and output. Therefore, be sure to connect to ground carefully when measuring both the input and output voltages simultaneously using 2 channels of the electronic voltmeter. 7.The speaker's minus terminal cannot be connected to ground when using a BTL format amplifier. Therefore, do not connect any type of ground wire to this terminal. The OTL format is used with this system. 8.Use a large wire to connect to the dummy impedance generator when measuring the output. 9.Be sure to use a band pass filter (DV-12) when using mixed tape.
Specifications for measurement
Power supply voltage ................... AC 100 V (50/60 Hz) Standard output ........................ Speaker: 0.775V/4ohm Headphone:0.245V/32ohm Standard frequency and input level ................... 1 kHz: AUX: -8 dBs Input level for reproduction of recording characteristics ................... AUX: -28 dBs Measuring output terminal ................... Speaker: CN633 Load resistance .................................................... 4ohm
Radio input signal
AM frequency ..................................................... 400 Hz Degree of modulation in AM band .......................... 30% FM frequency ...................................................... 400 Hz Frequency deviation in FM band ..................... 22.5 kHz
1-15
RV-B550BU Location of parts to be adjusted Cassette handling mechanism
Head for recording, playing and erasing the tape
Cassette handling mechanism (reverse side)
Head azimuth adjusting screw (fast-forward) Head azimuth adjusting screw (rewind)
CN31
Head azimuth adjusting screw (rewind) Head azimuth adjusting screw (fast-forward)
Head for recording, playing and erasing the tape
Location of parts to be adjusted
VR37 Motor speed TP Bias oscillation frequency (wide pattern) L301 Bias oscillation frequency VR31 Lch recording frequency (bias adjustment) VR32 Rch recording frequency (bias adjustment)
1-16
RV-B550BU Adjustment of cassette handling mechanism
Items Condition Method for adjustment and confirmation Standard value Maximum output Parts to be adjusted Adjust the head azimuth screws when changing the head.
(1) Play back the VT-703 test tape. Confirmation Test tape: VT-703 (10 kHz) (2) Adjust the head azimuth screws so of head angle Measuring output terminal: that the tape playback mechanism Speaker terminal, speaker (R) records the maximum output level in (Load resistance: 4 ), both the fast-forward and rewind headphone terminal direction. (3) In all cases, both the fast-forward and rewind direction should be adjusted using head azimuth screws. Confirmation Test tape: VT-712 (3 kHz) of tape speed Measuring output terminal: Headphone terminal Adjust VR37 so that the frequency counter records 3,015 Hz 15 Hz when playing back the end of the VT-712 test tape (3 kHz) in the fast-forward direction.
Tape speed VR37 of cassette deck: 3,015 Hz 15 Hz
Items to be confirmed and standard values
Items Difference in speed between fastforward and rewind Wow and flutter Condition Test tape: VT-712 (3 kHz) Measuring output terminal: Speaker terminal, speaker (R) (Load resistance: 4 ), headphone terminal Test tape: VT-712 (3 kHz) Measuring output terminal: Headphone terminal Method for adjustment and confirmation Standard value Parts to be adjusted Should be confirmed when changing the motor.
The difference between fast-forward and Less than 60 rewind should be less than 60 Hz on the Hz frequency counter when playing back the beginning of the VT-712 test tape (3 kHz) in both directions. Wow and flutter should be recorded at less than 0.25% (WRMS) when playing back the VT-712 test tape (3 kHz) in the fast-forward direction. Less than 0.25% (WRMS)
Electronic performance
Items Confirmation of output Condition Measuring output terminal: CN34-5 or 7-terminal preamp base Test tape: VT-724 Method for adjustment and confirmation Confirm that the output from the CN34-5 or 7-terminal preamp base connector is 25 dBs 3 dB when playing back the VT724 test tape. Reference value: The output from the headphone terminal is -7 dB 4 dB. Confirm that the 10 kHz reproduction level is -1 dB 5 dB compared to the 1 kHz reproduction level when playing back the VT-739 test tape. Standard value Output of CN345 terminal: -25 dBs 3 dB Difference between Lch and Rch: within 3 dB Difference between 10 kHz and 1 kHz should be -1 dB 5 dB. 6 kHz Parts to be adjusted
Confirmation Measuring output terminal: Headphone terminal of reproduction Test tape: VT-739 of frequency characteristics Recording bias frequency Fast-forward or rewind direction: Test tape: TYPE II (AC514) Measuring terminal: Bias TP on the base
Switch the bias (beat cut switch) between 100 kHz 1 and 2 to confirm that the frequency changes. Load the test tape (AC-514 for TYPE II) into the mechanism and preset it to the record-pause mode. Confirm that the bias TP frequency on the base is 100 kHz 6 kHz.
1-17
RV-B550BU Standard values for confirmation of electronic performance
Items Erasing current (standard and reference value) Condition Method for adjustment and confirmation Standard value Parts to be adjusted
Fast-forward and Load the test tape (AC-514 for TYPE II, TYPE II: 110 rewind direction: AC-225 for TYPE I) into the tape mA Recording mode playback mechanism and preset it to the TYPE I: 75 mA AC-514 for TYPE II, record-pause mode. AC-225 for TYPE I After setting it to the recording mode, Measuring terminal: send 1 M in series to the erase head and Both erase head ter measure the erasing current from both minals erase head terminals. Standard frequencies: 1 kHz and 10 kHz (REF: -20 dB) Test tape: TYPE II: AC-514 Measuring input terminal: OSC IN Load the test tape (AC-514 for TYPE II, AC-225 for TYPE I) into the tape playback mechanism and preset it to the record-pause mode. Input the standard value of -20 dB and the standard frequencies of 1 kHz and 10 kHz repeatedly to the microphone input from the transmitter in the recording mode. Adjust VR31 for Lch and VR32 for Rch so that the difference in level between 10 kHz and 1 kHz is -1 dB 5 dB. Repeat the above for TYPE I and confirm that the difference in level is -XdB dB. Difference in Lch: VR31 output Rch: VR32 between 1 kHz and 10 kHz: -1 dB 5 dB
Adjustment of reproduction of frequency characteristics
(U version only) Sensitivity of reproduction of microphone mixing Microphone input Based on the reproduction level of the terminal: 1 kHz, -65 dB VT-724 test tape, confirm that the Test tape: VT-724 microphone level is 0 dBs 3 dB when a 1 kHz, 65 dBs signal is input. (The mixing volume and sound volume should be at maximum.) 0 dBs 3 dB (Based on the reproduction level of the VT-724)
1-18
RV-B550BU
Flow of functional operation until TOC read
Check Point
Power ON
Power Key
Slider turns REST SW ON.
Check that the voltage at the pin 5 of CN602 (or pin 5 of IC901) is 0V (a moment)?
Automatic tuning of TE offset
Laser ON
Check that the voltage at the pin3 of IC601 + side is + 5V?
Detection of disc
Automatic tuning of Foucus offset Confirm that the Focus error S-cuve siganl at the pin27 of IC601 is approx.2Vp-p Confirm that the siganl from pin24 IC603 is 0V as a accelerated pulse during approx.400ms.
Automatic measurement of Focus A-curve amplitude
Disc is rotated
Tracking error waveform at TOC reading Approx.3sec
pin 25 of IC601(TE)
Focus servo ON (Tracking servo ON) Confirm the waveform of the Tracking error signal at the pin25 of IC601 (R612) (See fig-1)
Approx 1.8V VREF
Automatic measurement of Tracking error amplitude
Tracking Disc to be servo braked to stop on statas TOC reading finishes Automatic measurement of TE amplitude and automatic tuning of 500mv/div TE balance 2ms/div Fig.1 Tracking servo off statas
Disc statas to rotate
Automatic tuning of Tracking error balance
Automatic tuning of Focus error balance
Automatic tuning of Focus error gain
Automatic tuning of Tracking error gain
TOC reading
Confirm the eys-pattern at the lead of TP602
Play a disc
1-19
RV-B550BU
Maintenance of laser pickup
(1) Cleaning the pick up lens Befor you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode (Fig.1) When the life of the laser diode has expired, the following symptoms wil appear. (1) The level of RF output (EFM output:ampli tude of eye pattern) will below.
Replacement of laser pickup
Turn off the power switch and,disconnect the power cord from the ac outlet.
Replace the pickup with a normal one.(Refer to " Pickup Removal " on the previous page)
Is RF output 1.1 0.15Vp-p?
NO Replace it.
Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.
YES O.K (Fig.1) Check the eye-pattern at TP1. Play a disc.
(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged due to excessive current.
Finish.
1-20
RV-B550BU
Description of major ICs
AN8806SB (IC601) : RF&Servo AMP
1.Terminal Layout
PD LD LDON LDP VCC RFRF OUT RF IN C.AGC ARF C.ENV C.EA CS BDO BDO CS BRT OFTR /NRFDET GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 PDAC PDBD PDF PDE PDER PDFR TBAL FBAL EFEF OUT TETE OUT CROSS TE BPF VDET LD OFF VREF ENV
2.Block Diagram
6 7 29 28 27 8 9 10 17 11 12 19
-+ -- +
-+
EQ AGC
RF DET
ENV CURCUIT
36
-+
+ VCBA --
-+
OFTR
13
BDO
14 15 16
35
-+
+ VCBA --VCBA +
31
34
-+ -VCBA + -+ + -+ -30 24 25 26 23 22 1 4 3
-+
20
32
-+ -- +
-- +
-- +
21
33
2
1-21
RV-B550BU
3. Functions
Pin No. 1 2 3 4 5 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 Symbol
PD LD LD ON LDP VCC RFRF OUT RF IN C.AGC ARF C.ENV C.EA CS BDO BDO CS BRT OFTR /NRFDET GND ENV VREF LD OFF VDET TE BPF CROSS TE OUT TEFE OUT FEFBAL TBAL PDFR PDER PDF PDE PD BD PD AC
I/O I O I --I O I I/O O I/O I/O I/O O I/O O O -O O -O I O O I O I I I I/O I/O I I I I
APC amp input terminal APC amp output terminal APC ON/OFF control terminal
Functions and operations
Connect to ground Power supply Inverse input pin for RF amp RFamp output RF input Connecting pin of AGC loop filter RF output A capacitor is connected to this terminal to detect the envelope of RF signal A capacitor is connected to this terminal to detect the envelope of RF signal A capacitor is connected to detect the lower envelope of RF signal BDO output pin A capacitor is connected to detect the lower envelope of RF signal Of-track status signal output RF detection signal output Ground Envelope output Reference voltage output Connect to ground Vibration detection signal output Input pin of tracking error through BPF Tracking error cross output Tracking error signal output Inverse input pin for tracking error amp Output pin of focus error Inverse input pin for focus error amp Focus balance control Tracking balance control F I-V amp gain control E I-V amp gain control I-V amp input I-V amp input I-V amp input I-V amp input
1-22
RV-B550BU BA6897FP-W (IC602) : 4channel driver
D.BUF CH1-OUTA 1 D.BUF CH1-OUTB 2 D.BUF CH1-INA CH1-INB TEST1 TEST2 MUTE 3 4 5 6 7 -+ T.S.D ++ Level shift + Level shift 26 CH4-OUTB D.BUF 25 CH4-INA 24 CH4-INB 23 BIAS IN 22 Vcc 27 CH4-OUTA 28 GND
BA15218N (IC801/IC831) : Dual op amplifier
BA15218N + 1 + 2
1 2 OUT1 -IN1
3 +IN1
4 5 VEE +IN2
6 -IN2
7 8 OUT2 Vcc
-+
8 CH2-INB 9 +CH2-INA 10 D.BUF CH2-OUTB 11 CH2-OUTA 12 D.BUF GND 13
-+
21 Vcc DRIVER MUTE 20 CH3-INB -+ 19 CH3-INA Level shift - + Level shift + D.BUF 18 CH3-OUTB 17 CH3-OUTA D.BUF 16 OP IN(+) 15 OP IN(-)
OP-OUT 14
LA4705NA (IC631) : power amplifier
NC
3
RIPPLE FILTER PREDRIVER POWER
Vcc1
18
1
OUTPUT PIN TO Vcc SHORT PROTECTOR
LA4705N
2
IN LOAD SHORT PROTECTOR
17 16 POWER
GND1
PREDRIVER
15
GND 4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
POWER BIAS CIRCUIT OVER VOLTAGE/ SURGE PROTECTOR THERMEL SHUTDOWN POWER
Vcc
OUTPUT PIN TO GND SHORT PROTECTOR OUTPUT PIN TO GND SHORT PROTECTOR
5
STANDBY SW
14
IN
7
PREDRIVER
LOAD SHORT PROTECTOR
13 12
POWER GND2
POP NOISE PREVENTION CIRCUIT
PREDRIVER
POWER OUTPUT PIN TO Vcc SHORT PROTECTOR
6
8
9
10
11
NC
NC
Vcc2
1-23
RV-B550BU
BH3852S (IC501) : E.Volume
1.Block diagram
FILTER BVO2 OUT2 BVN2 TVO2 BIN2 TIN2
NF2
IN2
VC
24
23
22
21
20
19
2k
18
17
16
15
10M
14
10M
13
10M
(BASS) (TREBLE) TONE CONTROL
20k
Vcc 20k 47k
+
47k 20k
MATRIX SURROUND SOUND
+
CONTROL
VOLUME
VOLUME
VOLUME
VOLUME
+
Vcc
20k
(BASS) (TREBLE) TONE CONTROL
2k
1
GND
2
IN1
3
NF1
4
BVN1
5
BIN1
6
BVO1
7
TIN1
8
TVO1
9
OUT1
10
Vcc
+
10M
11
SC
12
VREF
2.Pin function
Pin No. Pin name I/O Function Pin No. Pin name I/O Function
Ref.Voltage
BC
TC
1 2 3 4 6
GND IN1 NF1 BASS1 TRE1 OUT1 VCC LIVE VREF
I I -
Grand terminal Terminal for 1ch volume input Terminal for gain adjustment of input step amp. Terminal for connection of 1ch low-frequency filter Terminal for connection of 1ch
7.8 9 10 11 12
High frequency filter O Terminal for 1ch volume output - Terminal for power supply - Terminal for surround control O Terminal for reference voltage output
1-24
+
13 14 15 16 17.18 19
BASS TRE VOL OUT2 TRE2
I I I O I I -
Terminal for bass control Terminal for treble control Terminal for volume control Terminal for 2ch volume output Terminal for connection of 2ch high-frequency filter Terminal for connection of 2ch low-frequency filter Terminal for gain adjustment of input step amp. Terminal for 2ch volume output Terminal for filter
21 BASS2 NF2 IN2 VSET
22 23 24
RV-B550BU LC72136N(IC2):PLL Frequency synthesizer
1. Layout
XT FM/AM CE DI CLOCK DO FM/ST/VCO AM/FM 1 2 3 4 5 6 7 8 9 10 SDIN 11 22 21 20 19 18 17 16 15 14 13 12 XT GND LPFOUT LPFIN PD VCC FMIN AMIN IFCONT IFIN
2. Block
Phase Detector Charge Pump
1 22
Reference Driver
18 19 20
16
1/2
Swallow Counter 1/16,1/17 4bit
Unlock Detector
15
12bit Programmable DriverS 12
3 4 5 6 17 21 Power on Reset C2B I/F Universal Counter
Data Shift Register & Latch
3. Function
Pin No. 1 2 3 Symbol XT FM/AM CE I/O I O I
7
8
2
11 13
Function X'tal oscillator connect (75kHz) LOW:FM mode When data output/input for 4pin(input) and 6pin(output): H
Pin No. 12 13 14
Symbol IFIN IFCONT
I/O I O -
Function IF counter signal input IF signal output Not use
4
DI
I
Input for receive the sirisl data from controller
15
AMIN
I
AM Local OSC signal output
5 6
CLOCK DO
I O
Sync signal input use Data output for Controller Output port
16 17
FMIN VCC
I -
FM Local OSC signal input Power suplly(VDD=4.5-5.5V) When power ON:Reset circuit move
7
FM/ST/VCO
O
"Low": MW mode
18
PD
O
PLL charge pump output(H: Local OSC frequency Height than Reference frequency. L: Low Agreement: Height impedance)
8 9 10 11
AM/FM
O -
Not use Not use Input/output port Data input/output
19 20 21 22
LPFIN LPFOUT GND XT
I O I
Input for active lowpassfilter of PLL Output for active lowpassfilter of PLL Connected to GND X'tal oscillator(75KHz)
SDIN
I/O
1-25
RV-B550BU
TA78DL06S(IC390) : Regulator
INPUT 1
SHORT PROTECTION
BA44W12ST-V5/Z1(IC310):Regulator
VCC 2
+
1 OUT1
CTL 5 OUTPUT 2
+
GND 3
OVER VOLTAGE/ THERMAL SHUT DOWN PROTECTION
GND 3
+
4 OUT2
GP1U281X(IC903) : Remocon sensor
+
Limiter Amp. B.P.F Demodulator Integrator Comparator
GND
VCC
Vout
TA2008AN (IC 1): FM/AM,IF/DET
Block diagram
VT OSC Buff OUT IF OUT IF REQ AM FM MONO SY VCC
AM ANTENNA
AM RF IN
24 23
FM RF OUT
22
AM OSC
FM OSC 21
20
VCC1
OSC 0UT 19 AM REQ SW
+ IF OUT LPF 1 DET OUT MPX IN /REQ 18 17 16 15
LPF 2
14 13
VCO
AM RF
AM OSC
FM OSC
FM MPX Buff Buff IF Buff AF Buff AM/FM ST/MONO SW
1/8 DIV FM MIX AM MIX AM DET
FM RF FM ANTENNA
1 2 3 4
AGC
FM IF
AM IF
LEVEL DET
FM DET
ST LED MUTE
5
FM RF IN BPF
GND 1
MIX OUT
AGC
VCC2
6
7
8
FM IF
AM IF
GND 2
9
FM DET
10 ST IIND
11
12
L OUT
R OUT
+ +
L OUT
+ -
R OUT
-
1-26
RV-B550BU MN35510(IC603):DIGITAL SERVO&DIGITAL SIGNAL PROCESSER
1. Terminal Layout
21 ~ 40 41 ~ 60 20 ~ 1 80 ~ 61
2.Block Diagram
LRCKIN(MSEL) BCLK(SSEL) SRDATAIN (PSEL) IOSEL CLVS CRC BLKCK CLDCK SBCK SUBC DEMPH RESY FLAG6(RESY) SSEL SQCK SUBQ AVDD2 AVDD2 PCK EFM PLLF DSLF IREF DRF ARF RSEL PSEL MLD MCLK MDATA CK384(EFM) VCOF BYTCK SMCK FCLK CSEL MSEL X2 X1 ÊSTAT OUTPUT PORT MICRO COMPUTER INTERFACE CLV SERVO D/A CONVERTER SUB CODE BUFFER EFM DEMODULATION SYNC INTERPOLATION SUBCODE DEMODULATION CIRC ERROR CORRECTION DEINTERLEVE 16k SRAM 8TIMES OVER SAMPUNC DIGITAL FILTER PEM (R) 1BIT DAC LOGIC S PEM (L) AVSS1 AVDD1 OUTR
DIGITAL DEEMPHSIS
OUTL
FLAG IPFLAG DIGITAL AUDIO INTERFASE DIGITAL AUDIO INTERFASE INTER POLATION SOFT MUTING DIGITAL ATTENUATION PEAK DETECTIVE AUTO CUE TX
ECM PC LRCK SRDATA BCLK DMUTE TRKV KICK VREF TRVSTR ECS TVD TRD FOD TBAL FBAL TOFS TES /TLOCK /FLOCK PLAY LDON WVEL SENSE
DSL. PLL VCO
VCO ITUNING GENERATION PITCH CONTROL
A/D COVERTER
INPUT
SERVO TIMING GENERATOR
V V D S D S
D V D D 1
D / / V R T S S E S T S 1 T
F E
T E
R F E N V
T R C R S
V D E T
B D O
/ R F D E
O F T
1-27
RV-B550BU
3. Description
Pin No. 1 2 3 4 5 6 7 8 9 symbol I/O BCLK LRCK O Not used O Not used Description Pin No. 41 symbol TES I/O Description O Tracking error shunt signal output(H:shunt) Not used Not used RF signal input Reference current input pin Bias pin for DSL I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
42 PLAY 43 44 WVEL ARF
SRDATA O Not used DVDD1 DVSS1 TX MCLK MDATA MLD Power supply (Digital) Connected to GND I
45 IREF 46 DRF 47 DSLF 48 PLLF 49 VCOF 50 51 52 53 54 AVDD2 AVSS2 EFM PCK PDO
O Digital audio interface output Micom command clock signal input I (Data is latched at signal's rising point) I Micom command data input
I
I/O Loop filter pin for DSL I/O Loop filter pin for PLL Not used Power supply(Analog) Connected to GND(Analog) Not used Not used Not used Not used Not used Connected to GND(for X'tal oscillation circuit) Input of 16.9344MHz X'tal oscillation circuit
I Micom command load signal input O Sence signal output O Focus lock signal output Active :Low O Tracking lock signal output Active :Low O sub-code - block - clock signal output I Outside clock for sub-code Q resister input O Sub-code Q -code output Connected to GND I
10 SENSE 11 12 13 15 FLOCK TLOCK BLKCK SUBQ
14 SQCK
55 SUBC 56 SBCK 57 58 VSS XI
16 DMUTE
Status signal 17 STATUS O (CRC,CUE,CLVS,TTSTOP,ECLV,SQOK) 18 19 20 21 22 23 RST SMCK PMCK TRV TVD PC I I Reset signal input (L:Reset) Not used Not used
59 X2 60 61 VDD BYTCK
O Output of X'tal oscillation circuit Power supply(for X'tal cscillation circuit) Not used Not used Not used Not used Not used Not used Not used Not used Not used pull up pull up Power supply(Digital)
O Traverse enforced output O Traverse drive output Not used Spindle motor drive signal (Enforced mode output) 3-State Spindle motor drive signal (Servo error O signal output) O Kick pulse output I
I
62 CLDCK 63 FLAG 64 IPPLAG 65 FLAG
24 ECM 25 26 ECS KICK
O
66 CLVS 67 68 CRC DEMPH
27 TRD 28 FOD
O Tracking drive output O Focus drive output I Reference voltage input pin for D/A output block (TVD,FOD,FBA,TBAL)
29 VREF 30 31 32 33 34 35 36 FBAL TBAL FE TE RF ENV VDET OFT
69 RESY 70 IOSEL 71 72 73 74 75 TEST AVDD1 OUT L AVSS1 OUT R
O Focus Balance adjust signal output O Tracking Balance adjust signal output I I I I I I I I Focus error signal input(Analog input) Tracking error signal input(Analog input) RF envelope signal input(Analog input) Vibration detect signal input(H:detect) Off track signal input(H:off track) Track cross signal input RF detect signal input(L:detect) BDO input pin(L:detect)
O Lch audio output Connected to GND pull up Connected to GND Connected to GND Connected to GND Pull up
O Rch audio output
76 RSEL 77 CSEL 78 PSEL 79 MSEL
37 TRCRS 38 39 40 RFDET BDO LDON
O Laser ON signal output(H:on)
80 SSEL
1-28
RV-B550BU BA15218F-XE(IC401/751):OP AMP.
OUT1 1 -IN1 2 +IN1 3 VEE 4 1 + 2 + -
8 VCC 7 OUT2 6 -IN2 5 +IN2
1-29
RV-B550BU
VICTOR COMPANY OF JAPAN, LIMITED AUDIO DIVISION,10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.20826C)
Printed in Japan 200101 (V )