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PAT-4
DYNACO PAT-4 Manuals
Manuals and User Guides for DYNACO PAT-4. We have
3
DYNACO PAT-4 manuals available for free PDF download: Assembly Manual
DYNACO PAT-4 Assembly Manual (23 pages)
PHONO UPGRADE
Brand:
DYNACO
| Category:
Amplifier
| Size: 4.83 MB
Table of Contents
Table of Contents
2
Table of Figures
2
Section 1: about this Manual
3
Who Should Attempt These Projects
3
Tools and Supplies You'll Need
4
Recommended Solder
4
Project Overview
4
Important Safety Notes
4
Section 2: about the Phono Preamp Upgrade
5
Effects of the Modification
5
Before You Begin
5
Prerequisites
5
Preparing to Remove the Circuit Boards
6
PC Board Modifications
7
Figure 1-Stock PCB (before Upgrade)
8
Figure 2-Stock PCB (after Upgrade)
8
Figure 3-Detail of R2-C3-White-Wire Connection
9
Figure 4-Preparing C4 for Installation
10
Adding R30 if Your PCB Doesn't Have a Place for It
11
Installing the DRD4 Kit
11
PAT-4 PWR Modifications (Optional)
11
Figure 5-Insert R30 in from the Back of the Board
11
Figure 6-Final Step of R30 Installation in those Cases Where Holes Don't Already Exist on
11
Inspection and Preliminary Reassembly
12
Figure 7-Both Pcbs Reassembled Onto U Brackets, Ready for Installation
12
Final Wiring and Reassembly
13
If You Want 5 High Level Inputs and 1 Phono Input
13
Figure 8-Changes to Grounds for 5 High Level Input Version of PAT-4
14
Figure 9-Adding Shielded Cable as Part of the 5 High Level Input Modification
16
Final Sanity Checks
17
Prepare to Reconnect Your PAT-4 to Your Music System
17
Appendix 1: the Toothpick Trick
17
Appendix 2: First Class De-Soldering
18
Schematics
19
Figure 10-Schematic Shows Phono Preamp with Modifications
19
Figure 11-Schematic When Modified for 1 Phono and 5 High Level Inputs
20
Record Playing Reminders
21
Appendix 3 - Preparing a Shielded Cable End
22
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DYNACO PAT-4 Assembly Manual (20 pages)
UPGRADES for Line amp distortion reducer Tone control switch
Brand:
DYNACO
| Category:
Amplifier
| Size: 3.2 MB
Table of Contents
Table of Contents
2
Table of Figures
2
Section 1: about this Manual
3
Who Should Attempt These Projects
3
Tools You'll Need
3
Project Overview
4
Line Amp Distortion Reducer
4
Tone Control Switch
4
Important Safety Notes
4
Section 2: Line Amp Distortion Reducer
5
Line Amp Characteristics
5
How the Distortion Reduction Works
5
The Modification in a Nutshell
5
Preparing to Remove the Circuit Boards
5
Modifying the Left Channel Circuit Board
6
Figure 1-Applying Thermal Compound and Installing the Heat Sink
7
Figure 2-New Transistor with Heatsink Installed on PCB
8
Figure 3-MPSW45A Pinout
8
Figure 4-Circuit Board as Seen from Solder Side. the Modification Replaces Q4
8
Modifying the Right Channel Circuit Board
9
Inspection and Reassembly
9
Section 3: Tone Control Switch
10
Before You Begin
10
Pre-Wiring the Tone Control Switch
10
Figure 5-Switch Wiring Diagram. the Gray Dashed Lines Indicated Relations between
12
Optional Gain Reducing Resistors
13
Disassembling the PAT-4 Preamp
13
Removing the HI FILTER Switch
14
Mounting the Tone Control Switch
14
Wiring in the Tone Control Switch
14
Installing the Treble No-Click Resistors
16
Reassemble the PAT-4
16
Figure 6-Installing the Treble No-Click Resistors on Eyelets 16, 17, and 18
16
Using the Tone Control Switch
17
Pops and Clicks
17
Gain Trim Resistors
18
Figure 7-Tone Control Switch Installed and Wired to Bass Control, Treble Control and Pcb's (Green Wires Called out in the Assembly Directions Are Blue in the Pictures Above)
18
Figure 8-Schematic of the Preamp High Level Stage Showing the Addition of the Tone
19
Schematic
19
Appendix: the Toothpick Trick
20
DYNACO PAT-4 Assembly Manual (16 pages)
POWER SUPPLY
Brand:
DYNACO
| Category:
Amplifier
| Size: 1.97 MB
Table of Contents
Table of Contents
2
Table of Figures
2
Section 1: about this Manual
3
Other PAT-4 Upgrades
3
Who Should Attempt These Projects
3
Tools You'll Need
4
Project Overview
4
Section 2: Building the Power Supply PC Board
5
First, Get a Soup Bowl
5
Install the Resistors
5
Figure 1-Component Locating Guide
6
Resistor Notes
7
Install the Diodes
8
Diode Notes
8
Install the TO-92 Package Transistors
8
Install the TO-92 Package Integrated Circuits
9
Install the TO-220 Power Transistors
9
Figure 2-Front and Back Views of Q6 Mounted on Heat Sink
9
Install the Capacitors
10
Remove the Old Power Supply
11
Figure 3-Showing Wires to Cut and Screws to Remove
12
Install the New Power Supply
13
Connect the New Power Supply
13
Figure 4-Mounting the Power Supply to the PAT-4
13
Final Test and Assembly
14
Figure 5-New Power Supply Installed in PAT-4
14
Figure 6-Schematic of PAT-4 Electronically Regulated Power Supply (Rev B)
15
Schematic
15
Resistor Color Code
16
Figure 7-Demonstrating the Resistor Color Code
16
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