Tandy CM-8 User Manual

NO VERTICAL SWEEP
Circuits Checked:
• IC601 and its related circuits
• I C501 and its related circuits
Apply a ripple cu rrent signal, across a resistor
( 1 Kohm)
and capacitor ( 1 OµF) in series, to pin
@ of IC601 .
Sweep
occurs vertically on the raster.
No sweep occurs.
r--- ---
- -....,
IC501 C510 I
R507 C512 :
~ 1c601 R508 - R5111 Caution: When inspectin g, reduce
I R504 R510 R512 I the brightness level to protect the
I R505 C503 R513 I CRT from damage.
I R507 C506 R514 1
IC601
OY601
0504
R522
L - - - - - -~~J
L - -
Note: Ripple current signal is
represented at the junction of D
703
and 0704.
Circuits Checked:
• IC451 and its related circuits
• 0851 and its related circuits
• 0861 and its related circuits
• 0871 and its related circuits
The raster
is colored
in red or cyan.
Check the red video
circuit (0851 ).
r- - - - - - - - - 1
I IC451 C850 I
I 0851 R865 I
I C853
R868 I
1 R856
I R862
L_ __ - - _I
NO SPECIFIC COLOR
The raster is colored
in green or magenta .
Check the green video
circuit (0861 ).
r- --
1 IC451
I 0861
1 R863
L_ -
23
--,
R866 I
R869 I
C851
C854 I
- - _J
R505
0502
R503
R504
R508 I
I
_ _J
The raster is colored in
blue or yellow.
Check
the blue video
circuit (0871 ).
~C45l RS70
1
I 0871 C?52 :
l R858 C855
1
LC~6~ _ ~~4_J

Tandy CM-8 Specifications

General

Brand	Tandy
Model	CM-8
Category	Monitor
Language	English