Read Sony DCR-TRV900 Service Manual online
1
DCR-TRV900
OPERATION MANUAL
2
Contents
1.
SYSTEM CONTROL CIRCUIT .................................................................
3
1-1. Outline ....................................................................................................................... 3
1-2. System Control Block Description ............................................................................. 4
1-2-1. HI Controller (IC2204) ..................................................................................... 4
1-2-2. Mechanism Controller (IC2401) ....................................................................... 4
1-2-3. Camera Controller (IC302) ............................................................................... 4
1-2-4. Digital Still Controller (IC751) ......................................................................... 4
1-2-5. System Control Block Diagram ........................................................................ 5
1-3. Clock Signal Block Description ................................................................................. 6
Clock Signal Block Description Diagram ................................................................... 7
1-4. Power Reset Description ............................................................................................ 8
Power Reset Description Diagram .............................................................................. 9
2.
CAMERA CIRCUIT ................................................................................
10
2-1. Record Mode ........................................................................................................... 10
Dichroic Prism ..................................................................................................... 10
CCD Imager (IC100, IC101, IC102) ................................................................... 10
Sample-and-hold, AGC (IC203) .......................................................................... 10
A/D Converter (IC206, IC205, IC207) ................................................................ 10
Digital Camera Processor (IC300) ...................................................................... 10
Timing Generator (IC204) ................................................................................... 10
AE (Auto Exposure) ............................................................................................ 10
ND Filter .............................................................................................................. 10
Camera Block Diagram ....................................................................................... 11
2-2. Progressive System .................................................................................................. 10
2-2-1. Principle of Progressive System ..................................................................... 12
2-2-2. Loading Progressive Picture to Memory ......................................................... 13
2-2-3. Reading Progressive Picture from Memory to VFD ........................................ 13
2-3. New SteadyShot Function (Active Lens System) ..................................................... 14
Operating Principle .............................................................................................. 14
New SteadyShot Correction Circuit .................................................................... 15
2-4. New Imager ............................................................................................................. 16
2-4-1. Dichroic Prism ................................................................................................ 16
2-4-2. New 3-CCD Imager ........................................................................................ 16
2-4-3. Continuous Recording .................................................................................... 17
3.
MAIN SIGNAL CIRCUIT ........................................................................
18
3-1. MAIN IC Major Function Description ..................................................................... 18
VFD (IC1501), SFD (IC1600) ............................................................................ 18
TFD (IC1601), TRX (IC1900) ............................................................................ 18
BBI (IC1200), BIRDS (IC300) ........................................................................... 18
3-2. IC Connection Diagram ........................................................................................... 19
3-3. MAIN Signal Flow Description ............................................................................... 20
HONEY (IC756), VFD (IC1501) ........................................................................ 20
SFD (IC1600), TFD (IC1601) ............................................................................. 20
TRX (IC1900) ..................................................................................................... 20
3-4. MAIN Signal Circuit ................................................................................................ 21
4.
VIDEO CIRCUIT ....................................................................................
22
4-1. Recording System ................................................................................................... 22
5.
AUDIO CIRCUIT ....................................................................................
22
5-1. Recording System .................................................................................................... 22
5-2. Playback System ...................................................................................................... 22
5-2-1. Playback System (1) ....................................................................................... 22
5-2-2. Playback System (2) ....................................................................................... 22
6.
SERVO CIRCUIT ...................................................................................
24
6-1. Drum Servo Circuit .................................................................................................. 24
6-2. Capstan Servo Circuit .............................................................................................. 24
6-3. ATF Circuit .............................................................................................................. 26
7.
OTHERS ................................................................................................
28
7-1. Synchronization System During Recording with LINE Input ................................... 28
7-2. Synchronization System During Normal Playback (VTR Mode) .............................. 29
7-3. Synchronization System During Stop without Camera Input .................................... 30
8.
EEPROM ADJUSTMENT PAGES AND ADJUSTMENT ITEMS ............
31
9.
MS & PC CARD ADAPTER ...................................................................
32
3
1. SYSTEM CONTROL CIRCUIT
1-1. Outline
The DCR-TRV900 consists of its system with the four microprocessors (HI: Hu-
man Interface Controller, PCMCIA Digital Still Controller, Camera Controller
and Mechanism Controller). The data transfer system and its block diagram are
shown in Fig. 1-1.
Relation between the above described controllers is that the HI controller (Human
Interface Controller that is abbreviated as HI controller hereafter) functions as the
master microprocessor while the other microprocessors work as the slave micro-
processors. The HI controller establishes communication with other controllers
(IC302, IC2401 and IC751) using the clock synchronous serial communication.
When the HI controller detects any key input, it sends the corresponding mode
command to the camera controller and mechanism controller in accordance with
the contents of key input. The desired functions are realized by the camera and
VTR in accordance with the commands.
At the same time, status of camera and VTR is always sent to the HI controller
through the respective controller so that the HI controller monitors and controls
the operating mode of the DCR-TRV900 all the time.
The control data of the HI controller and that of the mechanism controller have
already been stored in the EEPROM (IC2404).
The control data of the camera controller is saved in the EEPROM (IC301) and
that of the PCMCIA digital still controller is saved in the EEPROM (IC760).
Fig. 1-1
IC2204
HI
CONTROL
µ
P
IC2404
EEPROM
(D)
IC302
CAMERA
CONTROL
µ
P
IC751
DIGITAL
STILL
CONTROL
µ
P
IC2401
MECHA
CONTROL
µ
P
IC301
EEPROM
IC760
EEPROM
IC2404
EEPROM
(E, F)
(B)
(C)
4
1-2. System Control Block Description
1-2-1. HI Controller (IC2204)
The HI controller is always monitoring the input signal from the keyboard, LANC,
SIRCS and chime, and issues the corresponding command to mechanism control-
ler, camera controller, OSD, LCD driver and others. The HI controllers and the
DCR-TRV900 system start up in the following sequence.
1 When a battery is installed, the main power is always supplied to the HI
controller as long as the main power is turned on. The DCR-TRV900 entire
system is reset by the HI controller. The HI controller monitors the input
signals all the time.
2 When the POWER ON command is issued from the HI controller as acti-
vated by the key input or any other input signals, the power is supplied to the
mechanism controller, camera controller and digital still controller.
3 Then the respective ICs that are connected to each controller are reset and
start their operations.
1-2-2. Mechanism Controller (IC2401)
…
To be called as mechanism controller hereafter
When the mechanism controller receives the mode transition commands from the
HI controller, it issues the commands to control the I/F that uses the i.- LINK, to
control the tape format (TFD), to control the LINE OUT signal (A01) and to con-
trol I/F (ABC) the microphone input signal. The respective ICs perform their
function in accordance with the commands. Status of these ICs are fed back to the
HI controller through the input controller so that the HI controller monitors and
controls the operating mode at all times.
1-2-3. Camera Controller (IC302)
…
To be called as camera controller hereafter
When the camera controller receives the mode transition commands from the HI
controller, it performs the following functions.
1 EEPROM (IC757) data reading and writing
2 Timing generator (IC204) control
3 VAP (IC302) control
4 FOCUS, ZOOM and ND filter control and motor control
5 Defects compensation and others
2 Timing generator (IC204) control
3 VAP (IC302) control
4 FOCUS, ZOOM and ND filter control and motor control
5 Defects compensation and others
At the same time when the above controls are performed, status of each controller
is fed back to the HI controller through the camera controller.
The mechanism controller and the camera controller are connected in parallel
with respect to the HI controller. Therefore, when any communication between
the mechanism controller and the camera controller is desired, a command needs
to be sent through the HI controller. For example, to send a command from the
mechanism controller to the camera controller, it needs to be sent from the mecha-
nism controller to the HI controller first, then from the HI controller to the camera
controller.
1-2-4. Digital Still Controller (IC751)
…
To be called as digital still controller hereafter
When the digital still controller receives the mode transition commands from the
HI controller, it performs the following functions.
1 It controls the file name and the header information when writing the com-
pressed data into the PC card and others.
2 It controls the file name and the header information when reading the com-
pressed data from the PC card and others.
