100 Minute Master Up/Down Timer

100 Minute Master Up/Down Timer

Preliminary Information
Release Year	1994
Leak Risk	Low
Batteries	None
Mounting Technology	Through Hole, Sockets
Capacitor Types	Aluminum Electrolytic, Ceramic, Trimmer (some models)
Destructive Entry	No

This is a standalone timer used in studios for synchronizing coundown/countup clocks. Manufactured by ESE. Model ES-362A. Uses Intel 8749-CT4 as the microcontroller.

Known Issues

The linear power supply runs hot and relies on electrolytic capacitors.

Symptom or Problem Encountered

• No display
• No timing signal

Causes

• Dried out electrolytic capacitors and a blown linear regulator IC.

Solutions

• Replace faulty parts.

Disassembly Notes

This device is easy to disassemble. The case is held together with screws and the PCB can be detached from the plastic standoffs easily. Make sure to snip the cable ties to make the wires long enough to flip over the board.

Original Parts

Main PCB

ES362A - PCB UCT-1 Logic

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Lead Spacing	Temp	Type	Brand	Series
C1	1	4700 µF	10	Through Hole, Axial	12mm		85 °C	Electrolytic	Shoei	CE
C2, C3	2	3300 µF	16	Through Hole, Radial	16mm	0.3"	105 °C	Electrolytic	Shoei	CEW
C4	1	10 µF	35	Through Hole, Radial	5mm	0.1"	105 °C	Electrolytic	Shoei	CEW
C5	1	100 µF	25	Through Hole, Radial	6mm	0.1"	105 °C	Electrolytic	Shoei	CEW
C6, C7	2	10 pF	50	Through Hole, Radial	4mm	0.2"		Ceramic Disc
C7 (option C models only)		5-30 pF		Through Hole				Trimmer Capacitor
C8, C10	3	0.01 µF	50	Through Hole, Radial	6mm	0.2"		Ceramic Disc
C9	1	4.7 µF	50	Through Hole, Radial	4mm	0.1"	105 °C	Electrolytic	Shoei	CEW
C11	1	0.1 µF	50	Through Hole, Radial	5mm	0.2"		Ceramic Disc

Other Passive Component Specifications and Footprint Information

Part	RefDes	Qty	Value	Power	Mount	Temp	Type	Tolerance
Resistor	R1, R2	2	75Ω	½ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R3	1	51kΩ	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R4	1	120kΩ	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R5, R6, R9-R16	10	22kΩ	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R7 (option Y and Z models only)	1	5.1kΩ	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R9-R46	27	220Ω	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R47-R53 (option T models only)	7	220Ω	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R62 (option T models only)	1	330Ω	¼ Watt	Through Hole, Axial		Carbon Film	10%
Resistor	R63	1	18Ω	¼ Watt	Through Hole, Axial		Carbon Film
Resistor	R64	1	150Ω	½ Watt	Through Hole, Axial		Carbon Film
Resistor	R65-R69	1	510Ω	¼ Watt	Through Hole, Axial		Carbon Film
Crystal	X1	1	1.8432 MHz		Through Hole, HC-49/U
Transformer	T1	1	6.3V CT	7.6 VA	Chassis Mount		P6134
Transformer	T1, T2 (option P models only)	2	6.3V CT	3.8 VA	Chassis Mount		P6465
Relay	K1 (option Y and Z models only)	1	1A 5A		Through Hole

Active Component Specifications and Footprint Information

Part	RefDes	Qty	Device	Type	Voltage	Current	Mount
IC	Z1	1	8749-CT4	Microcontroller			Through Hole, DIP
IC	Z2	1	4503	Hex non-inverting buffer with three-state outputs			Through Hole, DIP
IC	Z3	1	LM330T-5.0	5 volt linear regulator	5V	0.150A	Through Hole
IC	Z6-Z9	4	4511	BCD to 7-segment latch/decoder/driver			Through Hole, DIP
IC	Z10 (option T models only)	1	4511	BCD to 7-segment latch/decoder/driver			Through Hole, DIP
Transistor	Q1	1	PN2222	NPN BJT transistor	VCEO: 30V	IC: 0.6A	Through Hole
Transistor	Q3 (option Y and Z models only)	1	2N2907	PNP BJT transistor	VCEO: 60V	IC: 0.6A	Through Hole
Diode	D1-D5	5	1N4003	Rectifier Diode	VR: 200V	IO: 1A	Through Hole
Diode	D6 (option Y and Z models only)	1	1N4003	Rectifier Diode	VR: 200V	IO: 1A	Through Hole
Diode	D7-D23	17	1N4148	Small Signal Diode	VR: 75V	IO: 0.2A	Through Hole
Diode	DJT (option T models only)	1	1N4148	Small Signal Diode	VR: 75V	IO: 0.2A	Through Hole
Diode	DJZ (option Z models only)	1	1N4148	Small Signal Diode	VR: 75V	IO: 0.2A	Through Hole
Diode	DJN (option N models only)	1	1N4148	Small Signal Diode	VR: 75V	IO: 0.2A	Through Hole

Display PCB

ES362A - PCB UCT Display

Active Component Specifications and Footprint Information

Part	RefDes	Qty	Device	Type	Voltage	Current	Mount
Display	N1, N2	2	LTD6840Y	Two-digit amber LED display	VF: 2.1V	IF: 0.02A	Through Hole, DIP
Display	N3 (option T models only)	1	LTD6840Y	Two-digit amber LED display	VF: 2.1V	IF: 0.02A	Through Hole, DIP

Replacement Parts

Main PCB

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
C1	1	478TTA010M-ND	Digikey
C2, C3	2	UPW1C332MHD	Digikey Mouser
C4	1	UPS1C100MDD1TD	Digikey Mouser
C5	1	UFW1C101MDD1TD	Digikey Mouser
C6, C7	2	K100J15C0GF5TH5	DigiKey Mouser
C8, C10, C11	3	K103K10X7RF5UH5	DigiKey Mouser
C9	1	UVZ1H4R7MDD1TD	Digikey Mouser

Active Components

RefDes	Qty	Compatible Part Number	Order Links
Z3	1	LM330T-5.0/NOPB	Digikey Mouser
Q1	1	PN2222ABU	DigiKey Mouser
D1-D5	5	1N4003G	DigiKey Mouser
D7-D23	16	1N4148	DigiKey Mouser
DJT/DJZ/DJN	1	1N4148	DigiKey Mouser

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Connector Pinouts

DE-9

Pin	Function
1	Up
2	Stop
3	Reset
4	Down
5	Preset
6	Relay contact (dry contact, option "Z")
7	Relay contact (dry contact, option "Z")
8	N/C
9	Ground

BNC

Pin	Function
Center	Serial Time Signal Out
Shield	Ground

Related Links

• Current replacement device