Motorola bp 501 ce service manual

Page 1

SUPPLEMENT NO. 2 television MANUAL 68P65135A68
TO 15.597 SERVICE MANUAL

pm No. 68P65135A66 CHASSIS TS-597
MODEL BPSOICE

MOTOROLA service man UiIJ

GENERAL INFORMATION
This supplement introduces a new
receiver added to the Line since the
publication of the original TS-597
' Service Manual. A cabinet parts
¢ 3 a a list, unique chassis electrical and
< u: 5 mechanical parts listfor this model,
i g fl 2 and UHF tuner service instructions
2 n are included.
I ,3 .u
$< 8 For circuit information, refer to
a 5 S the D18TS-597 schematic diagram
< in TS-597 Supplement 1, Part
2 Number 68P65l35A67. For allother
information, refer to the original
z Ts-597 Service Manual, Part No.
3 68P65135A66. MODEL BP50ICE
'E' ,
3
2
MODEL BREAKDOWN CHART
i VHF UHF
MODEL 'CHASSIS TUNER TUNER CRT
BPSOICE lSTS-597 CMTT-393Y KTT-622 19GFP4
or or
v 1 5 3 KTT-éze 19GEP4
o 5 <
i Z i '5
Egg CHASSIS CODING CHANGES
: 2 g
a 2 Chassis . Chassis
Coding Chassis Coding Changes Coding Chassis Coding Changes
BTS-597A-05 TO PREVENT RADIATION FROM HTS-597A-08 RELIABILITY CHANGE: B+dr0pping
HORIZONTAL OUTPUT CIRCUIT: resistor R-803 changed from 3.3K,
Radiation shield added at rear of 7 Watt to 3K. 7 Watt, Part Number
flyback transformer. 175733877 to raise B+ voltage and
g increase reliability of neon pilot
6 ETS-597A-06 TO PREVENT REGENERATION IN lights.
VIDEO IF: B+ lead (blue wire
jumper) to 3rd IF stage divided into
two sections and mid-point bypassed 18TS-597A-09, RELIABILITY CHANGE: Added two
to ground with 1000 pf 20% ZSF C18TS-597A-O9 sparkgaps,Part No. 80668147A01, to
capacitor, C-125_ Part Number and prevent damage to power rectifiers in
215129821. D18TS-597A-O9 the event of an arc in the high Voltage
transformer or CRT. One gap is 10-
BTS-597A-D7 MECHANICAL CHANGE: Etched cared on the highvoltage transfdrmer
board changed from Part Number and connected from the negative AGC
84C681/10A02, to 84C68110A03 to ac- pulse winding to ground. The other
commodate three additional ca- gap is located at the B++focus lead
pacitors on top side of board. Ca- tap and is connected from B++ to
fl pacitors C-203, (2-520 and C-125 ground. This change is incorporated
relocated from bottom to top of board. in 182' receivers only.

MOTOROLA INC. 9401 WEST G RAN D AVENUE, FRAN KLI N PARK. I LLI N038
PART Moi 68P65135A68 10-66 PRICE IS cams PRINIED IN u.;.A.

Page 2

UHF TUNER ALIGNMENT - KTT-626

The UHF output signal is coupled to
VHF tuner with inter-connecting
cables. B+ Voltage of the UHF tuner
is obtained by an inter-connecting
lead between the UHF tuner and VHF
tuner.

The tuner is factory pre-aligned.
Alignment is not necessary or re-
commended.

The UHF tuner components are
rugged mechanisms and unless ob-
vious damage or tampering has oc-
cured, it should only be necessary
to adjust the mixer crystal current
for proper operating limits.

EQUIPMENT REQUIRED

UHF Sweep Generator: Tel-in-
strument type 1211, 12115 having a
30. ohm balanced matching pad such
an the RCA WG-224, WG-ZZ3, TIC-
1655 or equivalent instrument. In-
ternal marker not used.

External Marker Generator: Out-
,putwl volt ,or,more;,,£ixed,ireq_u,ency
44Mc; accuracy 1%.

Power Supply: TV chassis or other
shop supply (135V DC thru a 15K
resistor).

Milliammeter: 0-5 Ma range (20
ohms for total resistance of injec-
tion metering circuit).

TUNER CONNECTIONS

CAUTION: It is imperative that a
good ground connection exist be-
tween the power source andthe tuner
housing before applying power. This
procedure will prevent any possible
damage or failure of the mixer crys-
tal within the tuner.

1. Connect the UHF tuner B+ tie
point_(G-5) to the VHF tuners UHF
B+ T.P." through the series resistor
specified in the respective UHF
tuners schematic diagram.

HIE-ALIGNMENT NOTES

1. Disable the horizontal output sec-

FROM [12" 0F RG58IU
UHF (EL -

Tum J'I'

OUTPUT :-

CABLE

n

FIGURE I

UHF TUNER ALIGNMENT PROCEDURE

t'ion by disconnecting the screengrid
dropping resistor,

2. Use Figures #1 and #2 for test
equipment connections and adjust-
ment locations.

3. Cover must be in place during
adjustment,

4. Allow approximately 15 minutes
warm-up time before adjustment,

5. Connect UHF sweep generator
thru matching pad to tuner antenna
plugs.

RESISTOR
AND MEIER
TO HAVE A
COMBINED
RESISTANCE

T0 EXTERNAL
MARKER GENERATOR
(MC 6 1% ACCURACY)

? Jsvnzr

TEST EQUIPMENT CONNECTIONS

IMPORTANT NOTE: It is NOT recommended that any additional adjustments be made other than those

given below, otherwise, proper adjustment may be impossible. Remove oscillator cover; adjustments are
accessible through opening in oscillator cover.

TUNER KNOB SWEEP
STEP DRIVE SHAFT GENERATOR INDICATOR ADJUST ADJUST FOR AND/OR REMARKS

1. Fully counter- Sweep at 900Mc *Milliam- A Bend loop in or out for a reading of
clockwise and external meter (see ,5 to 4,0 milliamperes,
(Tuning gang marker set at Figure #1)
fully open) 44Mc

2. Turn slowly Track with tuner I' A Repeat Step #1 until crystal current
clockwise is within limits of .5 to 4.0 Me
across entire across band (1.0 to 2.0Ma is opti-
band to stop mum).

*Meter to be used for crystal current check should have a 0-5 milliampere range and the total meter cir-
cuit resistance should be 20 ohms.

W we. W

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