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Sony RM-785 Service Manual

Trinitron color video monitor.
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SERVICE MANUAL
Note: The service manuals for RM-785 have
been issued separately.
Color system
NTSC system
Picture tube
32-inch Trinitron tube
Approx. 80 cm picture measured
diagonally, 110-degree deflection.
AG pitch 0.9 mm
Resolution
VIDEO inputs: 650 TV lines
S VIDEO inputs: 650 TV lines
RGB inputs: 640 x 200 dots
(2000 characters)
Color temperature
9300 K
Horizontal linearity
Less than ±8%
Vertical linearity
Less than ± 7%
Line pull range
Horizontal: ±500 Hz
Vertical: -8 Hz
Overscan of the picture
Less than +7%
Input return loss
More than 35 dB up to 4 MHz
Zooming
Within 5%
Convergence
Zone I: within 1.3 mm
Zone II: within 1.7 mm
r��--4
Periphery: within 2.2 mm
Periphery
I
L���
1 -- x- '
•••
MICROFILM
SPECIFICATIONS
0.05y
II
0.05x
TRINITRO N
Canadian
Inputs
LINE A/B: BNC connector
Video input:
composite video, 1 Vp-p ±6 dB,
sync negative
automatic 75-ohm termination
VTR: 8-pin connector
1 Vp-p ±6 dB, sync negative.
75-ohm terminated
S video input:
LINE A/B: 4-pin MINI DIN corinector
Y (luminance signal): 1 Vp-p
± 6dB, sync negative
C (chrominance sigmil): 0.286 Vp-p
+6dB (burst signal)
automatic 75-ohm termination
RGB input:
ANALOG RGB: BNC connector
R.B 0.7 Vp-p ±6 dB
G/Sync on G 0.7 Vp-p
1 Vp-p. sync negative
automatic 75-ohm termination
DIGITAL RGB: TTL D-sub 9-pin
Audio input:
LINE A/B: phono jack. -5 dBs. high
impedance (stereo)
VTR: 8-pin connector. -5 dBs. high
impedance (monaural)
ANALOG RGB: phono jack, -5 dBs,
high impedance (stereo)
DIGITAL RGB: phono jack, -5 dBs.
high impedance (monaural)
External sync input:
BNC connector
4.0 Vp-p ±6 dB, negative
automatic 75-ohm termination
minijack. 5 Vp-p
CONTROL S input:
@
COLOR VIDEO MONITOR
SONY:
us
Model
Model
Chassis No. SCC-D39A-A
- Continued on next page -

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Table of Contents

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   Summary of Contents for Sony RM-785

  • Page 1 SERVICE MANUAL Model Canadian Model Chassis No. SCC-D39A-A SPECIFICATIONS Note: The service manuals for RM-785 have been issued separately. Inputs LINE A/B: BNC connector Video input: Color system NTSC system composite video, 1 Vp-p ±6 dB, Picture tube 32-inch Trinitron tube sync negative Approx.
  • Page 15: Operation

    PVM-3230 RM-785 1-3. OPERATION Displaying the Picture r- , � · � CJc'5c::DCI!JCDO== EJEJCJ , , i �! CJICJ CJ 1 6 ,CJ.CJ CJ U • CJ 1 C) CJ CJ CJ CJ Press the POWER switch to turn the powe� on.
  • Page 33: Focus Adjustment

    R M - 785 PVM - 3 2 3 0 P V M .. 3 2 3 0 ,, ,, M o no s cope pattern P V M - 3 2 3 0 A dj ust c o n v e rge n c e o f lower s c r e e n ce n t e r wi t h B.Y . B -r-r ..- ...
  • Page 38 PVM - 3 2 3 0 P V M - 3 2 3 0 RM -7 85 RM - 785 6 - 2 . C I R C U IT B O A R D S L O CA T ION ( P OW E R SU PPL Y ) ( R E AR PA N E L C O N T O R L 1 ) ( R E AR PA N E L C O N T R O L 2)
  • Page 44 PVM-3230 PVM-3230 PVM-3230 PVM-3230 RM-785 RM-785 RM-785 RM-785 (R.G.B OUT) (FBT, HV PROTECT] (VELOCITY MODULAT ION) ---- · -' - -C Board- -FBBoard- l!!�I lrt.J.B D,.!TJ �-�: � 1; l"D D -7 T,. S �, -- -- -- ..,..- - 1--- - -1r- '"'...
  • Page 51 PVM-3230 RM-785 � HEF. �U. PART NU. DES CR I PT I ON REMARK HEF.NO. PART NO. DES CR I PT I ON REHAR� ----------- ------- -------- ------- C3!9 CERAMIC 1-102-947-00 !OPF 0.5PF C464 ELECT !OOMF J-126-!0l-11 C 320 1-123-356-00...
  • Page 63 PVM-3230 RM-785 �@D REMARK DES CR I PT I ON REMARK :REF.NO. PART NO. DES CR I PT I ON REF. Nll. P,\RT NO. ----------- ------- -------- ------- -------- ----------- R2547 !-247-881-00 CARBON 120K !/4W CARBON 4 .7 K 1/4W...

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