Sansui RZ-3700-AV, RZ-5700-AV, RZ-7700-AV Service manual
AV RECEIVER
RZ-3700AV/RZ-5700AV/RZ7700AV
SERVICE
Manual
AV RECEIVER
CONTENTS
1. Specifications
2. Adjustment
3. Block Diagrams
4. Schematic Diagrams
5. Wiring Diagram
6. PCB Diagrams
7. Mechanical Parts List
8. Electrical Parts List
PHONO
INPUT SELECTOR
ANA/DIG
PRO LOGIC/DSP
MEMORY TUNING
PRESET
SOUND EDIT
STANDBY
OVERLOAD
SPEAKER MODE
CD LD TAPE/MD DVD AUX/TV VCR TUNER/BAND
ON/STANDBY
SPEAKERS
A
B
AV SURROUND RECEIVER RZ-7700AV
PHONES
POWER
MASTER VOLUME
DOWN UP
BASS/TREBLE
TONE CONTROL
DOLBY
D I G I T A L
DIGITAL
SURROUND
DIGITAL
MULTI
CHANNEL
DTS
R
PHONO
S.BASS PRO LOGIC DSP MEMORY TUNING
PRESET
SOUND EDIT
STANDBY
SLEEP
SPEAKER MODE
CD LD TAPE/MD DVD AUX/TV VCR TUNER/BAND
DVD 5.1ch
ON/STANDBY
SPEAKERS
A
B
AV SURROUND RECEIVER
PHONES
POWER
MASTER VOLUME
DOWN UP
BASS/TREBLE
TONE CONTROL
DOLBY SURROUND
PRO. LOGIC
*Design and specifications are subject to change without notice for improvements
*CAUSION : Parts identified the SAFETY symbol( ) on the schematic diagram and
the parts list are critical for safety.
Use only replacement parts that have critical characteristics recommended
by the manufacturer.
DOLBY DIGITAL SURROUND
Dolby Laboratories spearheaded home theater with the introduction of Dolby Surround, and then defined it with the follow-up
format Dolby Pro-Logic Surround. They have continued the evolution of home theater with the introduction of Dolby Digital
Pro-Logic, a Multi-Channel Digital delivery system. Just as Dolby Surround found it’s beginnings in the cinema, so does Dolby
Digital. This advanced multi-channel digital sound, although originally conceived for and later chosen for HDTV, made it prectical to implement in the cinema because it enabled the film to retain the analog soundtrack. With backwards compatibility a
priority so the film could be played in any cinema, it was decided to place the new digital optical track between the sprocket
holes, which was a key factor in defining its maximum practical bit rate (see illustration).
In 1992 Dolby Surround Digital, the film sound format with Dolby Digital as its keystone, made its debut in the cinema. In less
than three years, more than 300 feature films had been released in this new format, and nearly 1,500 cinemas had been
equipped for playback of the digital soundtrack. Furthermore, Dolby Digital can now be brought to the consumer’s home today
via the LaserDisc.
Traditional Pulse Code Modulation (PCM), which is utilized on compact discs and LD’s 4-channel matrixed digital audio
tracks, uses a 16-bit word to “describe” the sampled point in the original analog wave. By sampling this analog wave 44,100
times per second for each channel, the system will yield a dynamic range of 96 dB from the loudest sound to the noise floor.
However, this process creates an immense amount of data which is too large for multi-channel systems. Thus, a form of data
reduction must be employed to reduce the total amount of information without serious degradation of the sound quality –
hence the introduction of Dolby Digital.
The premise of Dolby Digital is simple, it reproduces the full bit resolution (16-bit) when a lower resolution will not result in the
same sound quality. However, when a lower resolution is acceptable, it will utilize this lower resolution opting instead for psychoacoustical theories and digital noise filtering technologies to help insure acceptable sound quality.
4–Channel Analog
Soundtrack (Matrixed)
AC-3
ENCODING
AC-3 IN THE CINEMA
5.1 – Channel
Digital Soundtrack
Code no. AH68-00036A
AMPLIFIER
OUTPUT POWER RZ-5700AV/RZ-7700AV
STEREO (6OHM, 0.09%, 1KHz) 130W + 130W
5CH (6OHM, 0.3%, 1KHz)
FRONT L, R 100W + 100W
CENTER 100W
REAR L,R 100W + 100W
OUTPUT POWER RZ-3700AV
STEREO (6OHM, 0.09%, 1KHz) 70W + 70W
5CH (6OHM, 0.3%, 1KHz)
FRONT L, R 50W + 50W
CENTER 50W
REAR L,R 50W + 50W
S/N RATIO(INPUT SHORT, IHF A FILTER) 90dB(RZ3700AV/RZ5700AV),95dB(RZ7700AV)
SEPARATION(INPUT SHORT, 1KHz) 72dB
MINIMUM NOISE 0.3mV
CROSSTALK(1KHz) 73dB
TUNER
FM
USABLE SENSITIVITY(DISTORTION 3%) 2dBu
IMAGE REJECTION RATIO 80dB
S/N MONO 80dB
S/N STEREO 70dB
SEPARATION 40dB
TOTAL HARMONIC DISTORTION (MONO) 0.30%
AM
USABLE SENSITIVITY 51dB
S/N RATIO 50dB
TOTAL HARMONIC DISTORTION 0.6%
VIDEO Section
Input sensitivity and impedance 1.0 V P-P/75 ohms
Output level and impedance 1.0 V P-P/75 ohms
SURROUND Section
Delay time RZ-3700AV/RZ-5700AV
DOLBY SURROUND 15~30mS
THEATER SURROUND 5~50mS
HALL, DOME, NATURAL SURROUND 5~100mS
Delay time RZ-7700AV
DOLBY PRO LOGIC
REAR SPEAKER 15~30mS
DOLBY DIGITAL
CENTER SPEAKER 0~5mS
REAR SPEAKER 0~15mS
Others
Power requirements. 230V, 50/60 Hz
For Taiwan 120V (60 Hz)
For Europe 230V, 50 Hz
Power consumption 390 watts 490 VA
560 watts Maximum / 1,300 watts Maximum(RZ-7700AV)
Dimensions 420 mm (16~15/16˝) W
130 mm (5~11/16˝) H
343 mm (13~13/16˝) D
Weight 14 kg (RZ-3700AV),15 kg (RZ-5700AV),13.5 kg (RZ-7700AV)
1. Specifications
1-1
2. Adjustment(RZ-3700AV/RZ-5700AV/RZ-7700AV)
2-1 Instrument
2-1
Fig 2-1 Location of Adjustment Point
2-1-1 Test Equipment
2-1-2 Pre-Adjustment
1. AM/FM Standard Signal Generator (S.S.G)
- FM : 1KHz, 75KHz(MOD) - AM :400Hz , 30% MOD - OUTPUT LEVEL : 50mW
2. Oscilloscope
3. VTVM
4. Frequency counter
5. Loop antenna
6. Dummy load (6½)
7. DC voltmeter
8. FM Stereo Modulator
1. Check the source voltage
2. Press TUNER/BAND to select the AM(MW) function.
3. Set the volume control to mid position.
4. Set volume control to approximaterly 50mW(6ohm)
2-2
2-2-2 AM Adjustment(2BAND)
AM tracking
adjustment
1
Fig 2-3
594 KHz
Fig . 2-3 AM Adjustment
594 KHz
TL2
(BLK)
Maximum output
Remark
FREQ. Setting
Adjust. Point
SSG.FREQ.Item
Step
Connection
Fig. 2-2 FM Adjustment
FM
SSG
75Ω
Dummy
Stereo
Modulator
(Pilot 10%)
OUT
Oscilloscope
FM antenna : FTP1
SET
Speaker
OUT
EXT
GND
VTVM
GND
6 ohm load
SET
60 cm
AM Signal
Generator
Loop
Antenna
Speaker
OUT
VTVM
IN
OUT
GND
Oscilloscope
AM ANT
Dummy Load
(6 ohm)
AUDIO
ANALYZER
2-2 Tuner Section
THD
Adjustment
FM Auto
Serach Level
Fig 2-2
1
2
Fig 2-2
98 MHz
TL2
Remark
THD/AUTO
SEARCH
Adjustment
Adjust. Point
SSG.FREQ.
Item
Step
Connection
Minimum
0.5%
Best resonating
point of SSG
98 MHz
-
TSVR1
2-2-1 FM Adjustment
Turn SSG
output 29dB
3-1
3. Block Diagram
PIC13
PIC3
PIC15
PIC1
PIC8
UIC1
PIC2
BA4560
BA4560
BA4560
BA4560
BA4560
PIC5
PIC6
PIC4
BA4560
RZ-3700AV/RZ-5700AV BLOCK
3-2
RZ-3700AV/RZ-5700AV FRONT
4-1
4. Schematic Diagram
4-1 Front Part
4-2
RZ-7700AV FRONT
RZ-3700AV/RZ-5700AV MAIN
4-3
4-2 Main Part
4-4
RZ-7700AV MAIN
RZ-3700AV/RZ-5700AV PROLOGIC
4-5
4-3 ProLogic Part(Only RZ-3700AV/RZ-5700AV)
4-6
4-4 SIDE Part(Only RZ-7700AV)
RZ-7700AV SIDE
RZ-3700AV/RZ-5700AV/RZ-7700AV TUNER
4-7
4-5 Tuner Part
4-8
4-6 DSP Part(Only RZ-7700AV)
RZ-7700AV DSP
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