Block Diagram Zvm-133 And Zvm-136 - Zenith ZVM-131 Service Manual

POWER
CORD
yn
MONITOR
MAIN BOARD
9-227-05
(SEE FIGURES 16. 17. AND 18)
cn~D~*~'C~~~C~~~-~~E~*--~~,---------------------~~~r-~~~~~~~--------~~----~~~~~~~------~~~~~~~~~pI
X
cp;;I
303
t:;::I
3F~ 3~i=l2Af,r 2B~;;;I 2~ ~ ~-MED 3T~ 3W~? 3vRs~
DB-25**
CONNECTOR
NEGATIVE
HORIZONTAL
COMPOSITE
SYNC
POSITIVE
HORIZ'ONTAL -'"
VERTICAL ..... ""'-
COMPOSITE
SYNC
RGBI
+12VDC
+26VDC
....-'
....
]-02*
n
8E7
*
~
RGB AND
DINTENSITY
..... _.3A7*
THE REFERENCED FIGURES ARE
COMPONENT LOCATIONS. WAVEFORMS.
AND SCHEMATICS FOR THE
APPLICABLE BOARD OR ASSEMBLY.
VIDEO B+
60 VPP
+26VDC
SUPPLY
170Vpp
APL
+12VDC /
SUPPLY /
START UP
AND
VIDEO B
(JUMPER) (JUMPER) (JUMPER)
~
RGB SiGNAL
GI. BASE
120VDC
I'-
VERTICAL DRIVE
I '.
AND BASE
(HORIZONTAL)
5A2* DRIVE 5C2*
==-
t=!=i
A-11161-04(ZVM-133)
A-11161-02(ZVM-136)
CRT. DEFLECTION YOKE.
VIDEO OUTPUT BOARD
9-155-12
(SEE FIGURES 25. 26.
AND 27)
AND BEAM BENDER ASSEMBLY
~DA~G~
________
2~~
CRT . /
SOCKET.- . /
,
,
~::=1'YOKE
CRT
DEGAUSSING
COIL
5X3t;=1
G2
~
'-
'"
.. t;:;;I5H3
FIL.
HIGH
VOLTAGE
/~S3
(JUMPERS)
~
1
P..!.::::a
HORIZ'ON-
WIDTH STEP ASSEMBLY
-
FLECTION (SEE FIGURES 22 AND 23)
TAL DE- A-15030
V
rvERTICAL~~~~~~3~T-3------------~ ~
DEFLECTION ,/' POWER
,..---
---- ---- ---- ------- ------ --
-
--------- --------------------- Y
SWITCH
2A3
1:::'
H.O.T.
V:
f-:
A-l1105
TRANSISTOR AND
BRACKET ASSEMBLY
(SEE FIGURE 21)
HIGH VOLTAGE AND HORIZONTAL SWEEP BOARD
9-247A
CX3204 &
CX3204A
I -
r+::-:
!---..r-I~]
PO WE R SWITCH
+150VDC
8
POWER INDICATOR
(SEE FIGURES 19. 20. AND 21>
r--
~----------------------~
SWEEP MODULE AND POWER SUPPLY ASSEMBLY A-lll 06-03
I
A-l0632-03
HIGH VOLTAGE
POWER SUPPLY
(SEE FIGURE 24)
--
~----------------------------------------------------- ----------------
RGB GAIN CONTROL MODULE
9-356
(SEE FIGURES 13. 14. AND 15)
Figure 9
Block Diagram ZVM-133 and ZVM-136
- BRIGHTNESS CONTROL
I _ _
PRIMARY CONTROL BOARD
A-12800
(SEE FIGURES .30 AND 31)
CONTRAST CONTROL
P
GREEN-WHITE SWITCH
Page 30
*CABLE PIN ASSIGNMENTS
D25
1
2
3
4
5
6
7
8
9
10
1 1
12
13
14
15
16
17
18
19
20
21
22
23
24
25
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
BA7
5
4
3
1
2
2A5
- -
1
2
3
4
8E? E D2 D
3
1 1
2 2
.2 2
5A2 2B5
5C2
- -
--
- -
4 1 5
3 2 4
2 3
3
1 4 2
5 1
**
DB-25 RGB INPUT CONNECTOR
PIN ASSIGNMENTS
NEGATIVE HORIZONTAL OR NEGATIVE COMPOSITE SYNC'
POSITIVE HORIZONTAL OR POSITIVE COMPOSITE SYNC'
NC (RESERVED FOR MIXED MODE)
POSITIVE VERTICAL OR POSITIVE COMPOSITE SYNC
GREEN INPUT
BLUE INPUT
RED INPUT
NC (RESERVED FOR VERTICAL HEIGHT SELECT)
NC (RESERVED)
GREEN FEEDTHROUGH
APPLE X 1 INPUT
APPLE X2 INPUT
APPLE X3 INPUT
NEGATIVE VERTICAL OR NEGATIVE COMPOSITE SYNC
IBM INTENSITY
GROUND
NC
AUDIO INPUT
GROUND
COMPOSITE VIDEO INPUT
RED FEEDTHROUGH
BLUE FEEDTHROUGH
NC
NC
APPLE X8 INPUT
'NOTE: COMPOSITE SYNC MUST BE SUPPLIED TO BOTH THE HORIZ'ONTAL
AND VERTICAL SYNC INPUTS.
Servicing