This service menu also for: Admiral TV CS 322 C2, CS 322 C16, C 322C3, C 322 C2, C 322 C17, CS322 C17, CS322 C26, C 322 C26, LC 322 C37, C 322 CZ7, CS 322 C27, LG 322C36, LCS322 C37, LC 322 C39, LCS 322 C39.
CHASSIS TYPE 29Z1, 29SZ1, 29Z1, 29SZ1, 29Z1, 29SZ1, 29Z1, 29SZ1, 29Z1, 29SZ1, 29Z1, 29SZ1, 29Z1B, 29SZ1B, 29Z1B, 29SZ1B, 29Z1B, 29SZ1B.
SPECIFICATIONS PICTURE TUBE
Type 21AXP22A round 21" three gun shadow mask type --aluminized tricolor phosphor dot
screen. Magnetic deflection--magnetic convergence--electrostatic focus.
OPERATING VOLTAGE
110-120 volts, 60 cycles, AC only
WATTAGE
380 watts
INPUT IMPEDANCE
300 ohms balanced to ground.
ANTENNA
See "ANTENNA REQUIREMENTS" on page 4.
IF FREQUENCIES
Intercarrier IF: Video 45.75 MC; Sound 41.25 MC
Sound IF: 4. 5 MC
FUSE LOCATION
See "Tube Location Diagram"
TUBE COMPLEMENT 29Z1
V101 6BN4 VHF RF Amp,
V102 6CG8 VHF Mixer-Osc.
V201 6BZ6 1st IF Amplifier
V202 6BZ6 2nd IF Amplifier
V203 6BZ6 3rd IF Amplifier
V204 6CB6 4th IF Amplifier
V205 12BY7 Luminance (Y) Amplifier
V206 6AU6 Gated AGC
V301 6U8 Sound IF - 1st Audio Amp.
V302 6AL5 Ratio Detector
V303 6V6GT Audio Output
V401 6AW8 1st Chroma Amp.-Color Killer
V402 6CL6 Chroma Amplifier
V403 12BH7 Chroma Demodulator
V404 21AXP22A Picture Tube
V501 6BH8 Burst Amp.-Pulse Shaper
V502 6AL5 Color Phase Discriminator
V503 6U8 3.58 MC Osc. - Osc. Control
V601 6CS6 Sync Separator
V602 6CG7 Sync Inv. - Vert. Osc.
V603 6AQ5 Vertical Output
V604 6CG7 Horizontal Oscillator
V605 6CB5A Horizontal Output
V606 6AU4GTA Damper
V607 1V2 Focus Rectifier
V608 3A3 H. V. Rectifier
V609 6BK4 Shunt Regulator
V701 5U4GB L. V. Rectifier
V702 5U4GB L. V. Rectifier
TUBE COMPLEMENT 29Z1B
Chassis 29Z1B uses the same above tube complement but with the following exceptions:
Tube type 6BV8 -- Ratio detector and separate additional audio amplifier.
Tube type 6L6GB Audio Output.
ADDITIONAL SERVICE ADJUSTMENTS ADMIRAL TM1021
Turn on your Television, press button DISPLAY> MUTE> SLEEP> FUZZY(PRESET)
REQUIRING TEST INSTRUMENTS
The following test instruments are required for the following adjustments.
1. VTVM with 30 KV high voltage probe.
2. Milliammeter (0-1 ma range).
3. Milliammeter (0-500 ma range).
HORIZONTAL LINEARITY
IMPORTANT: Unlike the adjustment on black and white TV receivers, the HORIZONTAL LINEARITY
control on the color receiver is much more critical and requires a different adjustment procedure. Mis-adjustment of the HORIZONTAL LINEARITY control on a color receiver will have very little effect upon the actual horizontal linearity, but can result in dam - age to the 6CB5A (horizontal output tube) or associated components. For this reason, the adjustment is accu-rately set at the factory and normally should not re-quire adjustment by the service technician. However, replacement of the horizontal output tube, linearity coil, etc. in the field may require adjustment of the HORIZONTAL LINEARITY control by the service technician. If adjustment is required, the follow-ing method is recommended.
Note: A DC milliammeter (0-500 ma range) is required for this adjustment.
Adjust as follows:
Remove fuse, F604 from its holder. See "Tube Location Diagram" page 66 for fuse location.
Insert a DC milliammeter between fuse holder terminals (positive terminal of meter connected to top cap).
Tune in Black and White picture. Adjust BRIGHTNESS, CONTRAST, FOCUS, VER-
TICAL, and HORIZONTAL controls for a normal picture.
Adjust the HORIZONTAL DRIVE control to the point where the vertical drive line(s)
just disappears, or at maximum (clockwise) if no drive line is present.
Adjust the HORIZONTAL LINEARITY control for minimum current reading. (Mini-mum cathode current of horizontal output tube).
Repeat step 4 for optimum drive setting.
Adjust the HORIZONTAL CENTERING control to center the pic
HIGH VOLTAGE REGULATOR- HORIZONTAL LINEARITY
A line voltage of 117 volts should be maintained during this adjustment. See Figure 3 fc adjustment locations.
8. Set the BRIGHTNESS and CONTRAST controls to minimum, ( for beam cutoff).
9. Connect a DC milliammeter (0-1 ma) in series with the cathode (Pin #1) of the 6BK4 regulator tube (positive lead to cathode). A test jumper is provided for meter insertion.
Caution: Milliammeter leads will be at B plus potential (380 volts). Be sure to isolate meter from chassis.
10. Readjust the HORIZONTAL LINEARITY coil in the direction of less inductance, (slug moving outward from coil) until the cathode current of the Horizontal Output tube is approximately 200 milliamperes. Do not exceed 210 milliamperes as lin-earity is disrupted above this value of current. The High Voltage should read in
the range of 18. 5 to 21. 5 KV, with regulator current of 750 to 1000 microamperes.
Optimum setting is 200 milliamperes output tube current with 20 KV high voltage
and regulator current of 950 microamperes.
PRELIMINARY SERVICE ADJUSTMENTS
It is important that any preliminary service adjustments be made before the color set-up adjustments to prevent upsetting color purity or convergence.
Carefully check, and if necessary, make the following adjustments in the order listed be-low.
CHANNEL SLUGS
The setting of the Fine Tuning control and Channel Slugs are much more critical for col-or reception.
Be sure the correct point of tuning, as described below, occurs at approximately mid-rotation of the Fine Tuning control.
IMPORTANT: If the Channel Slug or Fine Tuning control is slightly misadjusted for a black and
white program, the picture and sound may still be acceptable. With the same Channel Slug and Fine
Tuning control setting for a color program, the picture may not be in color.
The customer should be familiarized with the importance of correctly setting the Fine Tuning control.
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Admiral TM1021 TV Service Menu (All TV Service Menu Code)
5
stars -
"Admiral TM1021 TV Service Menu"
by Admin 2
Admiral TM1021 TV Service Menu,
This service menu also for: Admiral TV CS 322 C2, CS 322 C16, C 322C3, C 322 C2, C 322 C17, CS322 C17, CS322 C26, C 322 C26, LC 322 C37, C 322 CZ7, CS 322 C27, LG 322C36, LCS322 C37, LC 322 C39, LCS 322 C39. Written on May 04, 2020