Sony RM-B750 User manual

REMOTE CONTROL UNIT
RM-B750
MAINTENANCE MANUAL
1st Edition (Revised 1)
Serial No. 100001 and Higher

RM-B750
!WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so. Refer all servicing to
qualified service personnel.
!WARNUNG
Die Anleitung ist nur für qualifiziertes Fachpersonal bestimmt.
Alle Wartungsarbeiten dürfen nur von qualifiziertem Fachpersonal ausgeführt werden. Um die
Gefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei
Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen. Andere als die angegeben
Wartungsarbeiten dürfen nur von Personen ausgeführt werden, die eine spezielle Befähigung
dazu besitzen.
!AVERTISSEMENT
Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin
de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les
réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres.
Pour toute réparation faire appel à une personne compétente uniquement.

RM-B750 1 (P)
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according to the
manufacturer’s instructions.
Vorsicht!
Explosionsgefahr bei unsachgemäßem Austausch
der Batterie.
Ersatz nur durch denselben oder einen vom
Hersteller empfohlenen ähnlichen Typ. Entsorgung
gebrauchter Batterien nach Angaben des
Herstellers.
ATTENTION
Il y a danger d’explosion s’il y a remplacement
incorrect de la batterie.
Remplacer uniquement avec une batterie du même
type ou d’un type équivalent recommandépar le
constructeur.
Mettre au rebut les batteries usagées conformément
aux instructions du fabricant.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig
håndtering.
Udskiftning måkun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Lithiumbatteri - Eksplosjonsfare.
Ved utskifting benyttes kun batteri som
anbefalt av apparatfabrikanten.
Brukt batteri returneres
apparatleverandøren.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ
som rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande
föreskrifter.
VAROITUS
Paristo voi räjähtää jos se on virheellisesti
asennettu.
Vaihda paristo ainoastaan laitevalmistajan
suosittelemaan tyyppiin.
Hävitäkäytetty paristo valmistajan ohjeiden
mukaisesti.

RM-B750
Für Kunden in Deutschland
Entsorgungshinweis: Bitte werfen Sie nur entladene
Batterien in die Sammelboxen beim Handel oder den
Kommunen. Entladen sind Batterien in der Regel dann,
wenn das Gerät abschaltet und signalisiert “Batterie
leer”oder nach längerer Gebrauchsdauer der Batterien
“nicht mehr einwandfrei funktioniert”. Um
sicherzugehen, kleben Sie die Batteriepole z.B. mit
einem Klebestreifen ab oder geben Sie die Batterien
einzeln in einen Plastikbeutel.
2 (P)
For the customers in the Netherlands
Voor de klanten in Nederland
Hoe u de batterijen moet verwijderen, leest u in de tekst
van deze handleiding.
Gooi de batterij niet weg maar lever deze in als klein
chemisch afval (KCA).

1 (E)
RM-B750
Table of Contents
Manual Structure
Purpose of this manual ........................................................................................ 3 (E)
Relative manuals ................................................................................................. 3 (E)
Contents ............................................................................................................... 4 (E)
1. Service Overview
1-1. Connector Input/Output Signals ............................................................ 1-1 (E)
1-2. Connection Connector/Cable ................................................................ 1-1 (E)
1-3. Opening the RM-B750 .......................................................................... 1-1 (E)
1-4. Board Layouts ....................................................................................... 1-2 (E)
1-5. Functions of Internal Switches .............................................................. 1-2 (E)
1-6. Flexible Card Wire ................................................................................ 1-3 (E)
1-6-1. Disconnecting/Connecting the Flexible Card Wire ............. 1-3 (E)
1-6-2. Shaping the Flexible Card Wire ........................................... 1-4 (E)
1-7. Replacing the LCD Unit........................................................................ 1-5 (E)
1-8. Replacing the Touch Panel and Backlight ............................................ 1-7 (E)
1-9. Installing the IRIS Knob Assembly and WHITE Knob Assembly .......1-8 (E)
1-9-1. Installing the IRIS Knob Assembly ..................................... 1-8 (E)
1-9-2. Installing the WHITE Knob Assembly ................................ 1-9 (E)
1-10. Note on Service ..................................................................................... 1-9 (E)
1-10-1. Information of the Software Version ................................... 1-9 (E)
1-10-2. Description on Backup Battery ............................................ 1-9 (E)
1-10-3. Writing and Rewriting the PLD Internal Data ................... 1-10 (E)
1-10-4. Note on Replacing the FRAM ............................................1-11 (E)
1-10-5. Checking the Software Version ......................................... 1-11 (E)
1-10-6. Updating the Software ........................................................1-11 (E)
1-10-7. Touch Panel Calibration ..................................................... 1-12 (E)
1-10-8. Diagnosis ............................................................................ 1-13 (E)
1-10-9. Circuit Protective Elements ................................................ 1-14 (E)
1-10-10. Unleaded Solder .................................................................1-14 (E)
1-11. Recommended Replacement Parts ...................................................... 1-15 (E)
2. Electrical Alignment
2-1. Preparation ............................................................................................ 2-1 (E)
2-2. Adjusting the Video Level .................................................................... 2-2 (E)

2 (E) RM-B750
3. Spare Parts
3-1. Notes on Repair Parts .................................................................................. 3-1
3-2. Exploded Views .......................................................................................... 3-2
3-3. Electrical Parts List ..................................................................................... 3-6
4. Semiconductor Pin Assignments
5. Block Diagram
Overall .................................................................................................................... 5-1
6. Schematic Diagrams
MPU-124 ................................................................................................................ 6-2
VA-211 ................................................................................................................... 6-8
VR-277 ................................................................................................................. 6-10
LED-385 ............................................................................................................... 6-13
LED-389 ............................................................................................................... 6-14
CN-2278 ............................................................................................................... 6-15
CN-2308 ............................................................................................................... 6-15
Frame Wiring ........................................................................................................ 6-15
7. Board Layouts
MPU-124 ................................................................................................................ 7-2
VA-211 ................................................................................................................... 7-4
VR-277 ................................................................................................................... 7-5
CN-2278 ................................................................................................................. 7-6
CN-2308 ................................................................................................................. 7-6
LED-385 ................................................................................................................. 7-6
LED-389 ................................................................................................................. 7-6

3 (E)
RM-B750
Manual Structure
Purpose of this manual
This manual is the maintenance manual for Remote Control Unit RM-B750.
This manual is intended for use by the trained system enginneers and sevice engin-
neers, and describes information (service overview, parts lists, schematic diagram
and board layout) on the premise of component level service.
Relative manuals
Besides this maintenance manual the following manuals are available for this unit.
..
..
.Operation Manual (Supplied with this unit)
This manual is necessary for application and operation of this unit.
Part number: 3-620-577-XX
..
..
.System Manual (Available on request)
This manual is necessary for connection and operation of this unit and other
peripheral equipment.
If this manual is required, please contact your local Sony Sales Office/Service
Center.
..
..
.“Semiconductor Pin Assignments” CD-ROM (Available on request)
This “Semiconductor Pin Assignments” CD-ROM allows you to search for
semiconductors used in B&P Company equipment.
Semiconductors that cannot be searched for on this CD-ROM are listed in the
maintenance manual for the corresponding unit. The maintenance manual contains
a complete list of all semiconductors and their ID Nos., and thus should be used
together with the CD-ROM.
Part number: 9-968-546-XX

4 (E) RM-B750
Contents
The following are summaries of the each section for understanding the manual.
Section 1 Service Overview
Describes information about connector input/output signals, function of internal
switches board locations, replacement of part and notes on services.
Section 2 Electrical Alignment
Describe video level adjustment procedure.
Section 3 Spare Parts
Describes parts list, exploded views and frame list used in the unit.
Section 4 Semiconductor Pin Assignments
Contains information on semiconductors used for the unit.
It includes a complete list of the semiconductors and their ID Nos. for retrieving
information on “Semiconductor Pin Assignments”CD-ROM, which is available
separately.
Please refer to this section together with the “Semiconductor Pin Assignments”
CD-ROM.
Information on the semiconductors not contained in the CD-ROM at the time of
issue of this manual, if any, is given in this section as well.
Section 5 Block Diagram
Describe overall block diagram.
Section 6 Schematic Diagrams
Describes schematic diagrams for every circuit board and frame wiring.
Section 7 Board Layouts
Describes board layouts for every circuit board.

1-1 (E)
RM-B750
Section 1
Service Overview
1-1. Connector Input/Output Signals
MONITOR*
(BNC Type)
SDTV (NTSC/PAL) : VBS output (1.0 V p-p, 75 Z)
HDTV : Y signal output (1.0 V p-p, 75 Z)
*: This signal is output all the time.
CAMERA
(8P, FEMALE)
No. Signal Specification
1 TX (+) RM SERIAL DATA
2 TX (_)
3 RX (+) CAMERA SERIAL DATA
4 RX (_)
5 VIDEO (GND) GND for VIDEO
6 POWER (+) IN RM POWER
7 POWER (_) IN GND for POWER
8 VIDEO (X) OUT VBS 1.0 V p-p, Zo = 75 Z
C CHASSIS GND CHASSIS GND
1-2. Connection Connector/Cable
Connection made with the connector panels during instal-
lation or service, should be made with the connectors/
complete cable assemblies specified in the following list,
or equivalent parts.
Connector function Connection connector/Cable
CAMERA 1-706-848-11 PLUG, 8P MALE or
(8P, FEMALE) 1-783-372-11 Connection cord
(10 m) (supplied)
MONITOR 1-569-370-12 PLUG, BNC
(BNC)
(External View)
17
6
4
8
5
2
3
1-3. Opening the RM-B750
1. Loosen the screw (with drop-safe) and open the RM
connector cover in the direction of the arrow.
2. Loosen the four screws (with drop-safe) and open the
operation panel assembly and the bottom cover in the
direction of the arrow respectively.
RM connector cover
Screw
(with drop-safe)
Operation panel assembly
Bottom cover
Screws
(with drop-safe)
Screws
(with drop-safe)

1-2 (E) RM-B750
1-5. Functions of Internal Switches
MPU-124 Board
.S201
This switch is not used.
Factory-setting: OFF
.S205 (BUZZER ON/OFF)*1
This switch selects whether the buzzer sounds (ON) or
not (OFF) when the CALL signal is input.
Factory-setting: ON
*1: S205 is not used on the MPU-124 board with suffix -21 and higher.
.S206 (CCU-PW ON/OFF)
This switch turns on/off the power to the front panel.
Factory-setting: ON
1-4. Board Layouts
VR-277 board
CN-2278 board
LED-385 board
LED-389 board
MPU-124 board
CN-2308 board
VA-211 board
LCD unit
1-4. Board Layouts
1-5. Functions of Internal Switches
S206
S201
S205
12 3
A
B
C
*1
MPU-124 board (A side)